CN104236020B - Method and device for controlling air conditioning system - Google Patents

Abstract

The invention provides a method and device for controlling an air conditioning system and relates to the technical field of air conditioners. The method includes the steps that the real-time sensible heat load and the real-time latent heat load of a building are acquired and the rated sensible heat and the rated latent heat of the tail end of the air conditioning system of the building are acquired; according to the real-time sensible heat load and the rated sensible heat, the sensible heat load percent of the real-time sensible heat load to the rated sensible heat is acquired; according to the real-time latent heat load and the rated latent heat, the latent heat load percent of the real-time latent heat load to the rated latent heat is acquired; according to the real-time sensible heat load percent and the real-time latent heat load percent, real-time chilled water boundary temperature is determined; according to the real-time chilled water boundary temperature, the chilled water average temperature of the air conditioning system is adjusted, so that the chilled water average temperature is smaller than or equal to the real-time chilled water boundary temperature. According to the method and device, the problems that the refrigeration capacity and the dehumidification capacity of the air conditioning system are affected and energy consumption is large due to an existing control strategy of the air conditioning system can be solved.

Description

The control method of a kind of air conditioning system and device

Technical field

The present invention relates to air-conditioning technical field, particularly relate to control method and the device of a kind of air conditioning system.

Background technology

At present, the default chilled water leaving water temperature with the central air-conditioning of chilled water system is generally 7 DEG C, presets backwater temperature Degree is 12 DEG C, and chilled water mean temperature is 9.5 DEG C in this case, and this chilled water mean temperature can ensure that under design conditions Refrigeration and dehumidification requirements.Most current central air conditioner system keeps chilled water leaving water temperature to be 7 DEG C in actual moving process Constant, and chilled-water flow also keeps constant, under this control mode, during air conditioning system sub-load, return water temperature may Can be less than presetting return water temperature, i.e. 12 DEG C, the most only 9 to 10 DEG C, chilled water mean temperature now is 8 to 8.5 DEG C, and this is cold Although freezing water mean temperature to disclosure satisfy that the demand of load, but energy-saving effect being bad.

In order to realize the energy-saving effect of air conditioning system, a kind of common Energy Saving Strategy is that the water pump to air conditioning system becomes Frequently, to regulate chilled-water flow, it is ensured that return water temperature reaches 12 DEG C such that it is able to maintain 7 DEG C chilled water leaving water temperature and The state of the return water temperature of 12 DEG C, i.e. can maintain chilled water mean temperature is 9.5 DEG C.Now in the situation ensureing cooling needs The energy-saving run of air conditioning system can be realized down.Another kind of common Energy Saving Strategy is to improve the water outlet of air conditioning system freezing unit Temperature, generally the efficiency of air-conditioning refrigeration system can be along with chilled water leaving water temperature, or the raising of refrigerant evaporating temperature And raise, therefore conventional in building energy conservation a kind of Energy Saving Strategy is to improve chilled water supply water temperature, to realize improving refrigeration The performance of main frame, reduces the purpose of main frame energy consumption.Furthermore it is also possible to consider above two mode, to realize air conditioning system Energy-conservation purpose.

But, current Energy Saving Strategy can affect the exchange capability of heat of the end air treatment system of air conditioning system, thus shadow Ring refrigeration and the dehumidifying effect of air conditioning system, it is impossible to meet the heat exchange demand of the air conditioning terminal of air conditioning system；Meanwhile, architectural The load most time of central air-conditioning is less than design load, and carries out freezing and dehumidifying according to the design condition under design load Room can be caused supercool, cause energy waste.

Summary of the invention

Embodiments of the invention provide control method and the device of a kind of air conditioning system, to solve currently to regulate chilled water flow The strategy of amount and improve the refrigeration affecting air conditioning system that the strategy of leaving water temperature of air conditioning system freezing unit caused and remove The problem of wet ability, and can solve the problem that and for a long time carry out freezing according to the design condition under design load and dehumidifying can cause room Between supercool, problem that energy consumption is bigger.

For reaching above-mentioned purpose, the present invention adopts the following technical scheme that

A kind of control method of air conditioning system, including:

Obtain the real-time sensible heat load of building and real-time latent heat load, and obtain the specified sensible heat of air conditioning system end of building Amount and specified amount of latent heat；

According to described real-time sensible heat load and described air conditioning system end specified sensible heat amount, obtain described real-time sensible heat load Real-time sensible heat load percentage ratio with described air conditioning system end specified sensible heat amount；

According to described real-time latent heat load and the described specified amount of latent heat of air conditioning system end, obtain described real-time latent heat load Real-time latent heat load percentage ratio with the described specified amount of latent heat of air conditioning system end；

The most freezing waterside is determined according to described real-time sensible heat load percentage ratio and described real-time latent heat load percentage ratio Boundary's temperature；

According to the chilled water mean temperature of described real-time freezing water boundaries temperature regulation air conditioning system, so that described freezing Water mean temperature is less than or equal to described real-time freezing water boundaries temperature.

Concrete, described determine that one is real according to described real-time sensible heat load percentage ratio and described real-time latent heat load percentage ratio Time chilled water boundary temperature, including:

According to described real-time sensible heat load percentage ratio, with described real-time sensible heat load hundred in acquisition air conditioning system characteristic The first minimum chilled water mean temperature that proportion by subtraction is corresponding；

According to described real-time latent heat load percentage ratio, obtain in described air conditioning system characteristic and bear with described real-time latent heat The second minimum chilled water mean temperature that lotus percentage ratio is corresponding；

Described first minimum chilled water mean temperature is contrasted with the second minimum chilled water mean temperature, with described One minimum chilled water mean temperature and the minima of the second minimum chilled water mean temperature are as described real-time freezing water boundaries temperature Degree；

The described chilled water mean temperature according to described real-time freezing water boundaries temperature regulation air conditioning system, including:

The chilled water supply water temperature of regulation air conditioning system and/or chilled water water supply flow, average to regulate described chilled water Temperature is to described real-time freezing water boundaries temperature.

Further, the control method of described air conditioning system, also include:

Obtain building the whole year by time sensible heat load and the whole year by time latent heat load；

According to the described whole year by time sensible heat load and described air conditioning system end specified sensible heat amount, obtain the described whole year by time The whole year of sensible heat load and described air conditioning system end specified sensible heat amount by time sensible heat load percentage ratio；

According to the described whole year by time latent heat load and the specified amount of latent heat of air conditioning system end, obtain the described whole year by time latent heat The whole year of load and the described specified amount of latent heat of air conditioning system end by time latent heat load percentage ratio；

According to the described whole year by time sensible heat load percentage ratio and the described whole year by time latent heat load percentage ratio determine that one is annual By time chilled water boundary temperature；

According to the described whole year by time chilled water boundary temperature, annual by time total heat load and chilled-water flow calculate determine cold Freeze water supply water temperature；

According to the cooling water return water temperature pre-set, air conditioning system refrigeration host computer rate of load condensate function and described chilled water Supply water temperature, the refrigerating efficiency COP of acquisition air conditioning system refrigeration host computer:

$COP=\frac{273+T_{chwout}}{T_{cwin}-T_{chwout}}f\left(ld\right)$

Wherein, COP is the refrigerating efficiency of described air conditioning system refrigeration host computer；T_chwoutFor described chilled water supply water temperature； T_cwinFor described cooling water return water temperature；F (ld) is described air conditioning system refrigeration host computer rate of load condensate function；

Operating load according to refrigeration host computer and described refrigerating efficiency, determine described refrigeration host computer energy consumption, be formulated For:

E_chiller=Q₁÷COP

Wherein, E_chillerFor described refrigeration host computer energy consumption；Q₁Operating load for described refrigeration host computer；

Pump energy consumption, cooling tower energy consumption and described refrigeration host computer energy consumption according to the air conditioning system pre-set, determines Described chilled water mean temperature be the described whole year by time chilled water boundary temperature time air conditioning system by time energy consumption, each little to the whole year Time by time energy consumption add up, acquire the first annual energy consumption of air conditioning system；

Obtain that described chilled water supply water temperature is air conditioning system during refrigeration host computer nominal condition leaving water temperature second is complete Year energy consumption；

According to described second annual energy consumption and the described first annual energy consumption, determine described chilled water mean temperature be described entirely Year by time chilled water boundary temperature time the annual amount of energy saving of air conditioning system, be formulated as:

E_as=E_at,r-E_at,s

Wherein, E_asFor described annual amount of energy saving；E_at,rFor the described second annual energy consumption；E_at,sFor the described first annual energy Consumption.

Concrete, the control method of described air conditioning system, also include:

According to the described whole year by time sensible heat load percentage ratio, obtain in described air conditioning system characteristic with the described whole year by Time the 3rd minimum chilled water mean temperature corresponding to sensible heat load percentage ratio；

According to the described whole year by time latent heat load percentage ratio, obtain in described air conditioning system characteristic with the described whole year by Time the 4th minimum chilled water mean temperature corresponding to latent heat load percentage ratio；

Described 3rd minimum chilled water mean temperature and the 4th minimum chilled water mean temperature are carried out by time contrast, with institute State the minima of the 3rd minimum chilled water mean temperature and the 4th minimum chilled water mean temperature as the described whole year by time freezing Water boundaries temperature.

Concrete, the described real-time sensible heat load obtaining building and in real time latent heat load, including:

Obtain the real-time sensible heat load of building, be formulated as:

Q=Q_t+Q_r+Q_i+Q_f

Q_t=α A₁(T_out-T_in)+βA₂(T_out-T_in)

Q_r=0.899CI

Q_i=Q_h+Q_d

Q_f=F ρ C_p(T_out-T_in)

Wherein, Q is described real-time sensible heat load；Q_tFor body of wall and the heat output of window；α is the heat transfer coefficient of body of wall；A₁For wall The heat transfer area of body；β is the heat transfer coefficient of window；A₂Heat transfer area for window；T_inFor temperature in building；T_outFor Outer Environment Temperature；Q_rFor radiant heat transfer amount；C is the comprehensive shaded coefficient of window；I is solar irradiance；Q_iFor the dissipating of human body and equipment in building The sum of heat；Q_fFor new wind and air penetration cause refrigeration duty；F is to enter the air mass flow in building；ρ is that air is close Degree；C_pFor heat capacity of air；

Obtain the real-time latent heat load of building, be formulated as:

Q '=Q '_f+Q′_i

Q′_f=rF (G_out-G_in)

Wherein, Q '_fThe latent heat load caused for new wind and infiltration wind；G_outWater capacity for Outer Environment air；G_inFor The water capacity of air in building；Q′_iThe latent heat load caused for wet dissipation such as building interior human body and plants；F is for entering in building Air mass flow；R is the gasification latent heat of default temperature.

A kind of control device of air conditioning system, including:

First computing unit, for obtaining the real-time sensible heat load of building and real-time latent heat load, and obtains the sky of building Adjusting system end specified sensible heat amount and the specified amount of latent heat of air conditioning system end；According to described real-time sensible heat load and described air-conditioning system System end specified sensible heat amount, obtains described real-time sensible heat load negative with the real-time sensible heat of described air conditioning system end specified sensible heat amount Lotus percentage ratio；According to described real-time latent heat load and the described specified amount of latent heat of air conditioning system end, obtain described real-time latent heat and bear Lotus and the real-time latent heat load percentage ratio of the described specified amount of latent heat of air conditioning system end；

Chilled water boundary temperature computing unit, for the real-time sensible heat load percentage obtained according to described first computing unit The most freezing water boundaries temperature is determined than with described real-time latent heat load percentage ratio；

Regulation unit, for the described real-time freezing water boundaries temperature determined according to described chilled water boundary temperature computing unit The chilled water mean temperature of degree regulation air conditioning system, so that described chilled water mean temperature is less than or equal to described real-time chilled water Boundary temperature.

Additionally, described chilled water boundary temperature computing unit, including:

First enquiry module, for according to described real-time sensible heat load percentage ratio, obtain in air conditioning system characteristic with The first minimum chilled water mean temperature that described real-time sensible heat load percentage ratio is corresponding；

Second enquiry module, for according to described real-time latent heat load percentage ratio, obtains described air conditioning system characteristic In the second minimum chilled water mean temperature corresponding with described real-time latent heat load percentage ratio；

First contrast module, for by described first minimum chilled water mean temperature and the second minimum chilled water mean temperature Contrast, using the minima of described first minimum chilled water mean temperature and the second minimum chilled water mean temperature as described The most freezing water boundaries temperature；

Described regulation unit, specifically for:

The chilled water supply water temperature of regulation air conditioning system and/or chilled water water supply flow, average to regulate described chilled water Temperature is to described real-time freezing water boundaries temperature.

Additionally, described first computing unit, be additionally operable to the whole year obtaining building by time sensible heat load and the whole year by time latent heat Load；According to the described whole year by time sensible heat load and described air conditioning system end specified sensible heat amount, obtain the described whole year by time aobvious The whole year of thermic load and described air conditioning system end specified sensible heat amount by time sensible heat load percentage ratio；According to the described whole year by time latent Thermic load and the specified amount of latent heat of air conditioning system end, obtain the described whole year by time latent heat load specified with described air conditioning system end The whole year of amount of latent heat by time latent heat load percentage ratio；

Described chilled water boundary temperature computing unit, be additionally operable to according to the described whole year by time sensible heat load percentage ratio and described Annual by time latent heat load percentage ratio determine a whole year by time chilled water boundary temperature；

The control device of described air conditioning system, also includes:

Chilled water supply water temperature determines unit, for according to the described whole year by time chilled water boundary temperature, annual by time complete Thermic load and chilled-water flow calculate and determine chilled water supply water temperature；

Refrigerating efficiency acquiring unit, for bearing according to the cooling water return water temperature pre-set, air conditioning system refrigeration host computer Lotus rate function and described chilled water supply water temperature, the refrigerating efficiency COP of acquisition air conditioning system refrigeration host computer:

$COP=\frac{273+T_{chwout}}{T_{cwin}-T_{chwout}}f\left(ld\right)$

Wherein, COP is the refrigerating efficiency of described air conditioning system refrigeration host computer；T_chwoutFor described chilled water supply water temperature； T_cwinFor described cooling water return water temperature；F (ld) is described air conditioning system refrigeration host computer rate of load condensate function；

Refrigeration host computer energy consumption determines unit, for the operating load according to refrigeration host computer and described refrigerating efficiency, determines institute State refrigeration host computer energy consumption, be formulated as:

E_chiller=Q₁÷COP

Wherein, E_chillerFor described refrigeration host computer energy consumption；Q₁Operating load for described refrigeration host computer；

First annual energy consumption determines unit, for according to the pump energy consumption of air conditioning system pre-set, cooling tower energy consumption And described refrigeration host computer energy consumption, determine described chilled water mean temperature be the described whole year by time chilled water boundary temperature time sky Adjusting system by time energy consumption, to annual each hour by time energy consumption add up, acquire the first annual energy consumption of air conditioning system；

Second annual energy consumption acquiring unit, being used for obtaining described chilled water supply water temperature is refrigeration host computer nominal condition water outlet The annual energy consumption of second of air conditioning system during temperature；

Annual amount of energy saving determines unit, for according to the described second annual energy consumption and the described first annual energy consumption, determining institute State chilled water mean temperature be the described whole year by time chilled water boundary temperature time the annual amount of energy saving of air conditioning system, use formula table It is shown as:

E_as=E_at,r-E_at,s

Wherein, E_asFor described annual amount of energy saving；E_at,rFor the described second annual energy consumption；E_at,sFor the described first annual energy Consumption.

It addition, described chilled water boundary temperature computing unit, also include:

3rd enquiry module, for according to the described whole year by time sensible heat load percentage ratio, obtain described air conditioning system feature In data with the described whole year by time the 3rd minimum chilled water mean temperature corresponding to sensible heat load percentage ratio；

4th enquiry module, for according to the described whole year by time latent heat load percentage ratio, obtain described air conditioning system feature In data with the described whole year by time the 4th minimum chilled water mean temperature corresponding to latent heat load percentage ratio；

Second contrast module, for by described 3rd minimum chilled water mean temperature and the 4th minimum chilled water mean temperature Carry out by time contrast, using the minima of described 3rd minimum chilled water mean temperature and the 4th minimum chilled water mean temperature as The described whole year by time chilled water boundary temperature.

Concrete, described first computing unit, it is used for:

Obtain the real-time sensible heat load of building, be formulated as:

Q=Q_t+Q_r+Q_i+Q_f

Q_t=α A₁(T_out-T_in)+βA₂(T_out-T_in)

Q_r=0.899CI

Q_i=Q_h+Q_d

Q_f=F ρ C_p(T_out-T_in)

Wherein, Q is described real-time sensible heat load；Q_tFor body of wall and the heat output of window；α is the heat transfer coefficient of body of wall；A₁For wall The heat transfer area of body；β is the heat transfer coefficient of window；A₂Heat transfer area for window；T_inFor temperature in building；T_outFor Outer Environment Temperature；Q_rFor radiant heat transfer amount；C is the comprehensive shaded coefficient of window；I is solar irradiance；Q_iFor the dissipating of human body and equipment in building The sum of heat；Q_fFor new wind and air penetration cause refrigeration duty；F is to enter the air mass flow in building；ρ is that air is close Degree；C_pFor heat capacity of air；

Described first computing unit, is additionally operable to obtain the real-time latent heat load of building, is formulated as:

Q '=Q '_f+Q′_i

Q′_f=rF (G_out-G_in)

Wherein, Q '_fThe latent heat load caused for new wind and infiltration wind；G_outWater capacity for Outer Environment air；G_inFor The water capacity of air in building；Q′_iThe latent heat load caused for wet dissipation such as building interior human body and plants；F is for entering in building Air mass flow；R is the gasification latent heat of default temperature.

The control method of the air conditioning system that the embodiment of the present invention provides and device, by real-time sensible heat load percentage ratio and institute State real-time latent heat load percentage ratio and determine the most freezing water boundaries temperature such that it is able to according to the most freezing water boundaries temperature The chilled water mean temperature of regulation air conditioning system, so that described chilled water mean temperature is less than or equal to described real-time freezing waterside Boundary's temperature so that this chilled water mean temperature be closer to this in real time freezing water boundaries temperature or with this most freezing water boundaries temperature Spend identical, thus avoid the strategy of current regulation chilled-water flow and the plan of the leaving water temperature of raising air conditioning system freezing unit The refrigeration affecting air conditioning system slightly caused and the problem of dehumidifying effect, and long-time according to the design condition under design load Carry out freezing and dehumidifying can cause room supercool, the problem that energy consumption is bigger.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used To obtain other accompanying drawing according to these accompanying drawings.

The flow chart one of the control method of a kind of air conditioning system that Fig. 1 provides for the embodiment of the present invention；

The flowchart 2 of the control method of a kind of air conditioning system that Fig. 2 (a) provides for the embodiment of the present invention；

The flow chart 3 of the control method of a kind of air conditioning system that Fig. 2 (b) provides for the embodiment of the present invention；

Fig. 3 is the air conditioning system schematic diagram in the embodiment of the present invention；

The structural representation one controlling device of a kind of air conditioning system that Fig. 4 provides for the embodiment of the present invention；

The structural representation two controlling device of a kind of air conditioning system that Fig. 5 provides for the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of protection of the invention.

The embodiment of the present invention provides the control method of a kind of air conditioning system, as it is shown in figure 1, include:

Step 101, the real-time sensible heat load obtaining building and real-time latent heat load, and obtain the air conditioning system end of building Specified sensible heat amount and specified amount of latent heat.

Step 102, according to real-time sensible heat load and air conditioning system end specified sensible heat amount, obtain real-time sensible heat load with empty The real-time sensible heat load percentage ratio of adjusting system end specified sensible heat amount.

Step 103, according to real-time latent heat load and the specified amount of latent heat of air conditioning system end, obtain real-time latent heat load with empty The real-time latent heat load percentage ratio of the specified amount of latent heat of adjusting system end.

Step 104, according to real-time sensible heat load percentage ratio and in real time latent heat load percentage ratio determine the most freezing waterside Boundary's temperature.

The chilled water mean temperature of step 105, basis the most freezing water boundaries temperature regulation air conditioning system, so that freezing Water mean temperature is less than or equal to the most freezing water boundaries temperature.

The control method of the air conditioning system that the embodiment of the present invention provides, by real-time sensible heat load percentage ratio and real-time latent heat Load percentage ratio determines the most freezing water boundaries temperature such that it is able to regulate air-conditioning system according to the most freezing water boundaries temperature The chilled water mean temperature of system, so that chilled water mean temperature is less than or equal to the most freezing water boundaries temperature so that this freezing Water mean temperature is closer to this most freezing water boundaries temperature or identical with this most freezing water boundaries temperature, thus avoids The impact that the strategy of the strategy of current regulation chilled-water flow and the leaving water temperature of raising air conditioning system freezing unit is caused is empty The refrigeration of adjusting system and the problem of dehumidifying effect, and carry out freezing and dehumidifying according to the design condition under design load for a long time Room can be caused supercool, the problem that energy consumption is bigger.

In one embodiment, above-mentioned step 104 is according to real-time sensible heat load percentage ratio and real-time latent heat load percentage ratio Determine the most freezing water boundaries temperature, can be accomplished in that

According to real-time sensible heat load percentage ratio, obtain in air conditioning system characteristic corresponding with real-time sensible heat load percentage ratio The first minimum chilled water mean temperature.

According to real-time latent heat load percentage ratio, obtain in air conditioning system characteristic corresponding with real-time latent heat load percentage ratio The second minimum chilled water mean temperature.

First minimum chilled water mean temperature is contrasted with the second minimum chilled water mean temperature, minimum cold with first Freeze water mean temperature with the minima of the second minimum chilled water mean temperature as the most freezing water boundaries temperature.

Such as, it is expressed as by publicity: T_b=min (T_s,T_l)；

Wherein, T_sFor meeting the minimum chilled water mean temperature of real-time sensible heat load demand, the i.e. first minimum freezing level All temperature；T_lFor meeting the minimum chilled water mean temperature of real-time latent heat load demand, the i.e. second minimum chilled water mean temperature.

This air conditioning system characteristic can be to dispatch from the factory in data in air conditioning system, the most as shown in table 1 below:

In air conditioning system characteristic, preset the chilled water return water temperature corresponding to each chilled water supply water temperature, cold Freeze water mean temperature and enter backwater temperature difference.It addition, each chilled water supply water temperature is also (permissible to there being total heat load percentage ratio Real-time total heat load percentage ratio, it is also possible to be annual by time total heat load percentage ratio), sensible heat load percentage ratio (can be real Time sensible heat load percentage ratio, it is also possible to be annual by time sensible heat load percentage ratio), and latent heat load percentage ratio (can be real Time latent heat load percentage ratio, it is also possible to be annual by time latent heat load percentage ratio).If it addition, having data the most not remember Carrying, then can be obtained by interpolation calculation method, such as chilled water supply water temperature often differs from 1 degree Celsius, total heat load percentage ratio phase Difference about 8%, sensible heat load percentage ratio difference about 5%, latent heat load percentage ratio difference about 14%, chilled water return water temperature differs about 0.6 degree Celsius, chilled water mean temperature differs about 0.8 degree Celsius.

The chilled water mean temperature according to the most freezing water boundaries temperature regulation air conditioning system in above-mentioned step 105, Can be accomplished in that

The chilled water supply water temperature of regulation air conditioning system and/or chilled water water supply flow, to regulate chilled water mean temperature To the most freezing water boundaries temperature.

Additionally, the real-time sensible heat load obtaining building in above-mentioned steps 101 and real-time latent heat load, can be by as follows Formula realizes:

Q=Q_t+Q_r+Q_i+Q_f

Q_t=α A₁(T_out-T_in)+βA₂(T_out-T_in)

Q_r=0.899CI

Q_i=Q_h+Q_d

Q_f=F ρ C_p(T_out-T_in)

Wherein, Q is real-time sensible heat load；Q_tFor body of wall and the heat output of window；α is the heat transfer coefficient of body of wall；A₁For body of wall Heat transfer area；β is the heat transfer coefficient of window；A₂Heat transfer area for window；T_inFor temperature in building；T_outFor Outer Environment temperature； Q_rFor radiant heat transfer amount；C is the comprehensive shaded coefficient of window；I is solar irradiance；Q_iFor human body and the heat dissipation capacity of equipment in building Sum；Q_fFor new wind and air penetration cause refrigeration duty；F is to enter the air mass flow in building；ρ is atmospheric density；C_pFor Heat capacity of air.

Q '=Q '_f+Q′_i

Q′_f=rF (G_out-G_in)

Wherein, Q '_fThe latent heat load caused for new wind and infiltration wind；G_outWater capacity for Outer Environment air；G_inFor The water capacity of air in building；Q′_iThe latent heat load caused for wet dissipation such as building interior human body and plants；F is for entering in building Air mass flow；R is the gasification latent heat of default temperature.

The real-time sensible heat load of above-mentioned acquisition building and the mode of real-time latent heat load can emulate soft by building load Part (such as Dest, Energyplus etc.) calculates, but is not only limited to this.

In order to make those skilled in the art be better understood by the present invention, a more specifically embodiment is set forth below, As shown in Fig. 2 (a), the embodiment of the present invention provides the control method of a kind of air conditioning system, including:

Step 201, the real-time sensible heat load obtaining building and real-time latent heat load, and obtain the air conditioning system end of building Specified sensible heat amount and specified amount of latent heat.

Wherein, the mode of the real-time sensible heat load and real-time latent heat load that obtain building may refer to above-mentioned steps 101 institute Showing, here is omitted.

And the air conditioning system end specified sensible heat amount built and the specified amount of latent heat of air conditioning system end can be in air conditioning systems Precalculate acquisition when design and erection, such as, can use building load simulation software (such as Dest, Energyplus etc.) Calculate.

Step 202, according to real-time sensible heat load and air conditioning system end specified sensible heat amount, obtain real-time sensible heat load with empty The real-time sensible heat load percentage ratio of adjusting system end specified sensible heat amount.

Step 203, according to real-time latent heat load and the specified amount of latent heat of air conditioning system end, obtain real-time latent heat load with empty The real-time latent heat load percentage ratio of the specified amount of latent heat of adjusting system end.

Step 204, according to real-time sensible heat load percentage ratio, obtain in air conditioning system characteristic with real-time sensible heat load hundred The first minimum chilled water mean temperature that proportion by subtraction is corresponding.

This air conditioning system characteristic can be as listed in Table 1, and the most calculated real-time sensible heat load percentage ratio is 70%, then the first of its correspondence the minimum chilled water mean temperature should be 14.3 degrees Celsius.

Step 205, according to real-time latent heat load percentage ratio, obtain in air conditioning system characteristic with real-time latent heat load hundred The second minimum chilled water mean temperature that proportion by subtraction is corresponding.

The most calculated real-time latent heat load percentage ratio is 43%, then the second of its correspondence cold water mean temperature should It it is 12.7 degrees Celsius.

Step 206, the first minimum chilled water mean temperature is contrasted with the second minimum chilled water mean temperature, with One minimum chilled water mean temperature and the minima of the second minimum chilled water mean temperature are as the most freezing water boundaries temperature.

Such as, above-mentioned sensible heat load percentage ratio is 70%, when latent heat load percentage ratio is 43%, and the first minimum chilled water Mean temperature should be 14.3 degrees Celsius, and the second cold water mean temperature should be 12.7 degrees Celsius, then should determine that 12.7 degrees Celsius are This most freezing water boundaries temperature.

Step 207, the chilled water supply water temperature of regulation air conditioning system and/or chilled water water supply flow, to regulate chilled water Mean temperature is to this most freezing water boundaries temperature.

By regulation chilled water mean temperature to the most freezing water boundaries temperature, it is possible to realize air conditioning system and i.e. meet sensible heat Load and the work requirements of latent heat load, again can be the most energy-conservation.

It addition, as shown in Fig. 2 (b), the mode of concrete determination amount of energy saving illustrates as follows:

Step 208, obtain building the whole year by time sensible heat load and the whole year by time latent heat load.

Wherein, the whole year of building by time sensible heat load and the whole year by time latent heat load can pass through building load simulation software (such as Dest, Energyplus etc.) calculate.

Step 209, according to the whole year by time sensible heat load and air conditioning system end specified sensible heat amount, obtain annual by time sensible heat The whole year of load and air conditioning system end specified sensible heat amount by time sensible heat load percentage ratio.

Step 210, according to the whole year by time latent heat load and the specified amount of latent heat of air conditioning system end, obtain annual by time latent heat The whole year of load and the specified amount of latent heat of air conditioning system end by time latent heat load percentage ratio.

Step 211, according to the whole year by time sensible heat load percentage ratio and the whole year by time latent heat load percentage ratio determine that one is annual By time chilled water boundary temperature.

Wherein it is possible to be accomplished in that according to the whole year by time sensible heat load percentage ratio, obtain air conditioning system feature In data with the whole year by time the 3rd minimum chilled water mean temperature corresponding to sensible heat load percentage ratio；According to the whole year by time latent heat bear Lotus percentage ratio, obtain in air conditioning system characteristic with the whole year by time the 4th minimum freezing level corresponding to latent heat load percentage ratio All temperature；3rd minimum chilled water mean temperature is contrasted with the 4th minimum chilled water mean temperature, minimum cold with the 3rd Freeze the minima of water mean temperature and the 4th minimum chilled water mean temperature as the whole year by time chilled water boundary temperature.It is concrete Implementation is similar to step 204-206, and here is omitted.

Step 212, according to the whole year by time chilled water boundary temperature, annual by time total heat load and chilled-water flow calculate really Determine chilled water supply water temperature.

Step 213, the cooling water return water temperature according to pre-setting, air conditioning system refrigeration host computer rate of load condensate function and cold Freeze water supply water temperature, obtain the refrigerating efficiency of air conditioning system refrigeration host computer.

Concrete, the process of step 213, can be formulated as:

$COP=\frac{273+T_{chwout}}{T_{cwin}-T_{chwout}}f\left(ld\right)$

Wherein, COP is the refrigerating efficiency of air conditioning system refrigeration host computer；T_chwoutFor chilled water supply water temperature；T_cwinFor cooling Water return water temperature；F (ld) is air conditioning system refrigeration host computer rate of load condensate function.What deserves to be explained is, the public affairs of above-mentioned steps 213 correspondence Formula unique formula of non-computational refrigerating efficiency, the refrigerating efficiency of this air conditioning system refrigeration host computer can also obtain by other means ?.

Step 214, according to the operating load of refrigeration host computer and refrigerating efficiency, determine refrigeration host computer energy consumption.

Concrete, the process of step 214, can be formulated as:

E_chiller=Q₁÷COP

Wherein, E_chillerFor refrigeration host computer energy consumption；Q₁Operating load for refrigeration host computer.

The pump energy consumption of air conditioning system, cooling tower energy consumption and the refrigeration host computer energy consumption that step 215, basis pre-set, Determine chilled water mean temperature be annual by time chilled water boundary temperature time air conditioning system by time energy consumption, to annual each hour By time energy consumption add up, acquire the first annual energy consumption of air conditioning system.

Wherein, annual 8760 hours within each hour, are referred to the whole year.

Wherein, the pump energy consumption of air conditioning system, cooling tower energy consumption can be to count in advance according to respective power and operation time Determining, here is omitted.

Step 216, acquisition chilled water supply water temperature are the air conditioning system second during refrigeration host computer nominal condition leaving water temperature Annual energy consumption.

Can also calculate chilled water supply water temperature by the formula in above-mentioned steps 213 and mode is refrigeration host computer name volunteer The annual energy consumption of air conditioning system second during condition leaving water temperature.It addition, chilled water supply water temperature is refrigeration host computer nominal condition water outlet Temperature belongs to the conventional setting in air conditioning system field, and therefore the annual energy consumption of its correspondence can also be by the money of dispatching from the factory of air conditioning system Directly obtaining in material etc., this refrigeration host computer nominal condition leaving water temperature can be typically 7 degrees Celsius.

Step 217, according to the annual energy consumption of the second annual energy consumption and first, determine chilled water mean temperature for annual by time cold The annual amount of energy saving of air conditioning system when freezing water boundaries temperature.

Above-mentioned steps 217, can be formulated as:

E_as=E_at,r-E_at,s

Wherein, E_asFor annual amount of energy saving；E_at,rIt it is the second annual energy consumption；E_at,sIt it is the first annual energy consumption.

What deserves to be explained is, " first ", " second " in the embodiment of the present invention etc. is merely to carry out the district of identical noun Point, do not represent priority.It addition, what deserves to be explained is, by the regulation chilled water supply water temperature of air conditioning system and/or cold Freeze water water supply flow, to regulate the chilled water mean temperature chilled water boundary temperature to the present invention, all at the protection model of the present invention Within enclosing.

It addition, the present invention can also use the return water temperature boundary condition as control air conditioning system of chilled water, or cold Freeze the supply water temperature of water with that enter backwater temperature difference and be used as boundary condition.

The air conditioning system that the embodiment of the present invention is applied is as it is shown on figure 3, include refrigeration host computer 31, the fan unit being connected two-by-two Pipe 32 and chilled water pump 33.

The control method of the air conditioning system that the embodiment of the present invention provides, by sensible heat load percentage ratio and latent heat load percentage Ratio determines a chilled water boundary temperature such that it is able to the chilled water according to chilled water boundary temperature regulation air conditioning system is the warmest Degree, so that chilled water mean temperature is less than or equal to chilled water boundary temperature so that this chilled water mean temperature is closer to this Chilled water boundary temperature or identical with this chilled water boundary temperature, thus avoid the strategy of current regulation chilled-water flow and carry The refrigeration affecting air conditioning system that the strategy of the leaving water temperature of high air conditioning system fridge group is caused and the problem of dehumidifying effect, With for a long time carry out freezing according to the design condition under design load and dehumidifying can cause room supercool, bigger the asking of energy consumption Topic.

Corresponding to above-mentioned embodiment of the method, the embodiment of the present invention also provides for the control device of a kind of air conditioning system, such as Fig. 4 Shown in, including:

First computing unit 41, can obtain the real-time sensible heat load of building and real-time latent heat load, and obtain building Air conditioning system end specified sensible heat amount and the specified amount of latent heat of air conditioning system end；According to real-time sensible heat load and air conditioning system end Specified sensible heat amount, obtains the real-time sensible heat load percentage ratio of real-time sensible heat load and air conditioning system end specified sensible heat amount；According to Latent heat load and the specified amount of latent heat of air conditioning system end in real time, obtains real-time latent heat load and the specified amount of latent heat of air conditioning system end Real-time latent heat load percentage ratio.

Chilled water boundary temperature computing unit 42, the real-time sensible heat load percentage that can obtain according to the first computing unit 41 The most freezing water boundaries temperature is determined than with real-time latent heat load percentage ratio.

Regulation unit 43, can adjust according to the most freezing water boundaries temperature that chilled water boundary temperature computing unit 42 determines The chilled water mean temperature of joint air conditioning system, so that chilled water mean temperature is less than or equal to the most freezing water boundaries temperature.

Additionally, in one embodiment, this chilled water boundary temperature computing unit 42, including:

First enquiry module 421, can be according to real-time sensible heat load percentage ratio, with reality in acquisition air conditioning system characteristic Time the first minimum chilled water mean temperature corresponding to sensible heat load percentage ratio.

Second enquiry module 422, can be according to real-time latent heat load percentage ratio, with reality in acquisition air conditioning system characteristic Time the second minimum chilled water mean temperature corresponding to latent heat load percentage ratio.

First contrast module 423, can be by the first minimum chilled water mean temperature and the second minimum chilled water mean temperature Contrast, using the first minimum chilled water mean temperature with the minima of the second minimum chilled water mean temperature as the most freezing Water boundaries temperature.

Regulation unit 43, specifically can regulate chilled water supply water temperature and/or the chilled water water supply flow of air conditioning system, with Regulation chilled water mean temperature is to the most freezing water boundaries temperature.

It addition, this first computing unit 41, it is also possible to obtain whole year of building by time sensible heat load and the whole year by time latent heat Load；According to the whole year by time sensible heat load and air conditioning system end specified sensible heat amount, obtain annual by time sensible heat load and air-conditioning The whole year of system end specified sensible heat amount by time sensible heat load percentage ratio；According to the whole year by time latent heat load and air conditioning system end Specified amount of latent heat, obtain annual by time latent heat load and the specified amount of latent heat of air conditioning system end the whole year by time latent heat load percentage Ratio.

It addition, this chilled water boundary temperature computing unit 42, it is also possible to according to the whole year by time sensible heat load percentage ratio and complete Year by time latent heat load percentage ratio determine a whole year by time chilled water boundary temperature.

It addition, as it is shown in figure 5, the control device of above-mentioned air conditioning system, also include:

Chilled water supply water temperature determines unit 44, can according to the whole year by time chilled water boundary temperature, annual by Shi Quanre Load and chilled-water flow calculate and determine chilled water supply water temperature.

Refrigerating efficiency acquiring unit 45, can be according to the cooling water return water temperature pre-set, air conditioning system refrigeration host computer Rate of load condensate function and chilled water supply water temperature, obtain the refrigerating efficiency of air conditioning system refrigeration host computer.

It is formulated as:

$COP=\frac{273+T_{chwout}}{T_{cwin}-T_{chwout}}f\left(ld\right)$

Wherein, COP is the refrigerating efficiency of air conditioning system refrigeration host computer；T_chwoutFor chilled water supply water temperature；T_cwinFor cooling Water return water temperature；F (ld) is air conditioning system refrigeration host computer rate of load condensate function.

Refrigeration host computer energy consumption determines unit 46, can determine refrigeration according to the operating load of refrigeration host computer and refrigerating efficiency Main frame energy consumption.

It is formulated as:

E_chiller=Q₁÷COP

Wherein, E_chillerFor refrigeration host computer energy consumption；Q₁Operating load for refrigeration host computer.

First annual energy consumption determines unit 47, can be according to the pump energy consumption of the air conditioning system pre-set, cooling tower energy Consumption and refrigeration host computer energy consumption, determine chilled water mean temperature be annual by time chilled water boundary temperature time air conditioning system by time Energy consumption, to annual each hour by time energy consumption add up, acquire the first annual energy consumption of air conditioning system.

Second annual energy consumption acquiring unit 48, can obtain chilled water supply water temperature is that refrigeration host computer nominal condition goes out water temperature The annual energy consumption of second of air conditioning system when spending.

Annual amount of energy saving determines unit 49, can determine freezing level according to the second annual energy consumption and the first annual energy consumption All temperature be annual by time chilled water boundary temperature time the annual amount of energy saving of air conditioning system.

It is formulated as:

E_as=E_at,r-E_at,s

Wherein, E_asFor annual amount of energy saving；E_at,rIt it is the second annual energy consumption；E_at,sIt it is the first annual energy consumption.

Concrete, as it is shown in figure 5, this chilled water boundary temperature computing unit 42, it is also possible to including:

3rd enquiry module 424, can according to the whole year by time sensible heat load percentage ratio, obtain in air conditioning system characteristic With the whole year by time the 3rd minimum chilled water mean temperature corresponding to sensible heat load percentage ratio.

4th enquiry module 425, can according to the whole year by time latent heat load percentage ratio, obtain in air conditioning system characteristic With the whole year by time the 4th minimum chilled water mean temperature corresponding to latent heat load percentage ratio.

Second contrast module 426, can be by the 3rd minimum chilled water mean temperature and the 4th minimum chilled water mean temperature Carry out by time contrast, using the minima of the 3rd minimum chilled water mean temperature and the 4th minimum chilled water mean temperature as the whole year By time chilled water boundary temperature.

Concrete, this first computing unit 41, the real-time sensible heat load of building can be obtained, be formulated as:

Q=Q_t+Q_r+Q_i+Q_f

Q_t=α A₁(T_out-T_in)+βA₂(T_out-T_in)

Q_r=0.899CI

Q_i=Q_h+Q_d

Q_f=F ρ C_p(T_out-T_in)

Wherein, Q is real-time sensible heat load；Q_tFor body of wall and the heat output of window；α is the heat transfer coefficient of body of wall；A₁For body of wall Heat transfer area；β is the heat transfer coefficient of window；A₂Heat transfer area for window；T_inFor temperature in building；T_outFor Outer Environment temperature； Q_rFor radiant heat transfer amount；C is the comprehensive shaded coefficient of window；I is solar irradiance；Q_iFor human body and the heat dissipation capacity of equipment in building Sum；Q_fFor new wind and air penetration cause refrigeration duty；F is to enter the air mass flow in building；ρ is atmospheric density；C_pFor Heat capacity of air；

First computing unit 41, it is also possible to obtain the real-time latent heat load of building, be formulated as:

Q '=Q '_f+Q′_i

Q′_f=rF (G_out-G_in)

Wherein, Q '_fThe latent heat load caused for new wind and infiltration wind；G_outWater capacity for Outer Environment air；G_inFor The water capacity of air in building；Q′_iThe latent heat load caused for wet dissipation such as building interior human body and plants；F is for entering in building Air mass flow；R is the gasification latent heat of default temperature.

The specific implementation controlling device of the air conditioning system that the embodiment of the present invention provides may refer to above-mentioned method Embodiment, here is omitted.

The control device of the air conditioning system that the embodiment of the present invention provides, by real-time sensible heat load percentage ratio and real-time latent heat Load percentage ratio determines the most freezing water boundaries temperature such that it is able to according to chilled water boundary temperature regulation air conditioning system Chilled water mean temperature, so that chilled water mean temperature is less than or equal to the most freezing water boundaries temperature so that this freezing level All temperature are closer to this most freezing water boundaries temperature or identical with this most freezing water boundaries temperature, thus avoid current What the strategy of the strategy of regulation chilled-water flow and the leaving water temperature of raising air conditioning system freezing unit was caused affects air-conditioning system The refrigeration of system and the problem of dehumidifying effect, and for a long time carry out freezing according to the design condition under design load and dehumidifying can be led Cause room is supercool, the problem that energy consumption is bigger.

Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or computer program Product.Therefore, the reality in terms of the present invention can use complete hardware embodiment, complete software implementation or combine software and hardware Execute the form of example.And, the present invention can use at one or more computers wherein including computer usable program code The upper computer program product implemented of usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.) The form of product.

The present invention is with reference to method, equipment (system) and the flow process of computer program according to embodiments of the present invention Figure and/or block diagram describe.It should be understood that can the most first-class by computer program instructions flowchart and/or block diagram Flow process in journey and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided Instruction arrives the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce A raw machine so that the instruction performed by the processor of computer or other programmable data processing device is produced for real The device of the function specified in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame now.

These computer program instructions may be alternatively stored in and computer or other programmable data processing device can be guided with spy Determine in the computer-readable memory that mode works so that the instruction being stored in this computer-readable memory produces and includes referring to Make the manufacture of device, this command device realize at one flow process of flow chart or multiple flow process and/or one square frame of block diagram or The function specified in multiple square frames.

These computer program instructions also can be loaded in computer or other programmable data processing device so that at meter Perform sequence of operations step on calculation machine or other programmable devices to produce computer implemented process, thus at computer or The instruction performed on other programmable devices provides for realizing at one flow process of flow chart or multiple flow process and/or block diagram one The step of the function specified in individual square frame or multiple square frame.

The present invention applies specific embodiment principle and the embodiment of the present invention are set forth, above example Explanation be only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, According to the thought of the present invention, the most all will change, in sum, in this specification Hold and should not be construed as limitation of the present invention.

Claims (10)

1. the control method of an air conditioning system, it is characterised in that including:

Obtain real-time sensible heat load and the real-time latent heat load of building, and obtain building air conditioning system end specified sensible heat amount and Specified amount of latent heat；

According to described real-time sensible heat load and described air conditioning system end specified sensible heat amount, obtain described real-time sensible heat load and institute State the real-time sensible heat load percentage ratio of air conditioning system end specified sensible heat amount；

According to described real-time latent heat load and the specified amount of latent heat of air conditioning system end, obtain described real-time latent heat load and described sky The real-time latent heat load percentage ratio of the specified amount of latent heat of adjusting system end；

The most freezing water boundaries temperature is determined according to described real-time sensible heat load percentage ratio and described real-time latent heat load percentage ratio Degree；

According to the chilled water mean temperature of described real-time freezing water boundaries temperature regulation air conditioning system, so that described freezing level All temperature is less than or equal to described real-time freezing water boundaries temperature.

The control method of air conditioning system the most according to claim 1, it is characterised in that described negative according to described real-time sensible heat Lotus percentage ratio and described real-time latent heat load percentage ratio determine the most freezing water boundaries temperature, including:

According to described real-time sensible heat load percentage ratio, with described real-time sensible heat load percentage ratio in acquisition air conditioning system characteristic The first corresponding minimum chilled water mean temperature；

According to described real-time latent heat load percentage ratio, obtain in described air conditioning system characteristic with described real-time latent heat load hundred The second minimum chilled water mean temperature that proportion by subtraction is corresponding；

Described first minimum chilled water mean temperature is contrasted with the second minimum chilled water mean temperature, with described first Low chilled water mean temperature and the minima of the second minimum chilled water mean temperature are as described real-time freezing water boundaries temperature；

The described chilled water mean temperature according to described real-time freezing water boundaries temperature regulation air conditioning system, including:

The chilled water supply water temperature of regulation air conditioning system and/or chilled water water supply flow, to regulate described chilled water mean temperature To described real-time freezing water boundaries temperature.

The control method of air conditioning system the most according to claim 2, it is characterised in that also include:

Obtain building the whole year by time sensible heat load and the whole year by time latent heat load；

According to the described whole year by time sensible heat load and described air conditioning system end specified sensible heat amount, obtain the described whole year by time sensible heat The whole year of load and described air conditioning system end specified sensible heat amount by time sensible heat load percentage ratio；

According to the described whole year by time latent heat load and the specified amount of latent heat of air conditioning system end, obtain the described whole year by time latent heat load With whole year of the described specified amount of latent heat of air conditioning system end by time latent heat load percentage ratio；

According to the described whole year by time sensible heat load percentage ratio and the described whole year by time latent heat load percentage ratio determine a whole year by time Chilled water boundary temperature；

According to the described whole year by time chilled water boundary temperature, annual by time total heat load and chilled-water flow calculate and determine chilled water Supply water temperature；

Supply water according to the cooling water return water temperature pre-set, air conditioning system refrigeration host computer rate of load condensate function and described chilled water Temperature, the refrigerating efficiency COP of acquisition air conditioning system refrigeration host computer:

$COP=\frac{273+T_{chwout}}{T_{cwin}-T_{chwout}}f\left(ld\right)$

Wherein, COP is the refrigerating efficiency of described air conditioning system refrigeration host computer；T_chwoutFor described chilled water supply water temperature；T_cwinFor Described cooling water return water temperature；F (ld) is described air conditioning system refrigeration host computer rate of load condensate function；

Operating load according to refrigeration host computer and described refrigerating efficiency, determine described refrigeration host computer energy consumption, be formulated as:

E_chiller=Q₁÷COP

Wherein, E_chillerFor described refrigeration host computer energy consumption；Q₁Operating load for described refrigeration host computer；

Pump energy consumption, cooling tower energy consumption and described refrigeration host computer energy consumption according to the air conditioning system pre-set, determines described Chilled water mean temperature be the described whole year by time chilled water boundary temperature time air conditioning system by time energy consumption, to annual each hour By time energy consumption add up, acquire the first annual energy consumption of air conditioning system；

Obtain the second annual energy that described chilled water supply water temperature is air conditioning system during refrigeration host computer nominal condition leaving water temperature Consumption；

According to described second annual energy consumption and the described first annual energy consumption, determine described chilled water mean temperature be the described whole year by Time chilled water boundary temperature time the annual amount of energy saving of air conditioning system, be formulated as:

E_as=E_at,r-E_at,s

Wherein, E_asFor described annual amount of energy saving；E_at,rFor the described second annual energy consumption；E_at,sFor the described first annual energy consumption.

The control method of air conditioning system the most according to claim 3, it is characterised in that also include:

According to the described whole year by time sensible heat load percentage ratio, obtain in described air conditioning system characteristic with the described whole year by time aobvious The 3rd minimum chilled water mean temperature that thermic load percentage ratio is corresponding；

According to the described whole year by time latent heat load percentage ratio, obtain in described air conditioning system characteristic with the described whole year by time latent The 4th minimum chilled water mean temperature that thermic load percentage ratio is corresponding；

Described 3rd minimum chilled water mean temperature and the 4th minimum chilled water mean temperature are carried out by time contrast, with described the The minima of three minimum chilled water mean temperatures and the 4th minimum chilled water mean temperature as the described whole year by time freezing waterside Boundary's temperature.

The control method of air conditioning system the most according to claim 2, it is characterised in that the real-time sensible heat of described acquisition building Load and in real time latent heat load, including:

Obtain the real-time sensible heat load of building, be formulated as:

Q=Q_t+Q_r+Q_i+Q_f

Q_t=α A₁(T_out-T_in)+βA₂(T_out-T_in)

Q_r=0.899CI

Q_i=Q_h+Q_d

Q_f=F ρ C_p(T_out-T_in)

Wherein, Q is described real-time sensible heat load；Q_tFor body of wall and the heat output of window；α is the heat transfer coefficient of body of wall；A₁For body of wall Heat transfer area；β is the heat transfer coefficient of window；A₂Heat transfer area for window；T_inFor temperature in building；T_outFor Outer Environment temperature； Q_rFor radiant heat transfer amount；C is the comprehensive shaded coefficient of window；I is solar irradiance；Q_iFor human body and the heat dissipation capacity of equipment in building Sum；Q_fFor new wind and air penetration cause refrigeration duty；F is to enter the air mass flow in building；ρ is atmospheric density；C_pFor Heat capacity of air；

Obtain the real-time latent heat load of building, be formulated as:

Q '=Q '_f+Q′_i

Q′_f=rF (G_out-G_in)

Wherein, Q '_fThe latent heat load caused for new wind and infiltration wind；G_outWater capacity for Outer Environment air；G_inFor building The water capacity of interior air；Q′_iThe latent heat load caused for wet dissipation such as building interior human body and plants；F is to enter the sky in building Throughput；R is the gasification latent heat of default temperature.

6. the control device of an air conditioning system, it is characterised in that including:

First computing unit, for obtaining the real-time sensible heat load of building and real-time latent heat load, and obtains the air-conditioning system of building System end specified sensible heat amount and the specified amount of latent heat of air conditioning system end；According to described real-time sensible heat load and described air conditioning system end Hold specified sensible heat amount, obtain the real-time sensible heat load hundred of described real-time sensible heat load and described air conditioning system end specified sensible heat amount Proportion by subtraction；According to described real-time latent heat load and the described specified amount of latent heat of air conditioning system end, obtain described real-time latent heat load with The real-time latent heat load percentage ratio of the described specified amount of latent heat of air conditioning system end；

Chilled water boundary temperature computing unit, for according to described first computing unit obtain real-time sensible heat load percentage ratio and Described real-time latent heat load percentage ratio determines the most freezing water boundaries temperature；

Regulation unit, adjusts for the described real-time freezing water boundaries temperature determined according to described chilled water boundary temperature computing unit The chilled water mean temperature of joint air conditioning system, so that described chilled water mean temperature is less than or equal to described real-time freezing water boundaries Temperature.

The control device of air conditioning system the most according to claim 6, it is characterised in that described chilled water boundary temperature calculates Unit, including:

First enquiry module, for according to described real-time sensible heat load percentage ratio, obtains in air conditioning system characteristic with described The first minimum chilled water mean temperature that sensible heat load percentage ratio is corresponding in real time；

Second enquiry module, for according to described real-time latent heat load percentage ratio, obtain in described air conditioning system characteristic with The second minimum chilled water mean temperature that described real-time latent heat load percentage ratio is corresponding；

First contrast module, for carrying out described first minimum chilled water mean temperature with the second minimum chilled water mean temperature Contrast, using the minima of described first minimum chilled water mean temperature and the second minimum chilled water mean temperature as described in real time Chilled water boundary temperature；

Described regulation unit, specifically for:

The chilled water supply water temperature of regulation air conditioning system and/or chilled water water supply flow, to regulate described chilled water mean temperature To described real-time freezing water boundaries temperature.

The control device of air conditioning system the most according to claim 7, it is characterised in that described first computing unit, also uses In obtain building the whole year by time sensible heat load and the whole year by time latent heat load；According to the described whole year by time sensible heat load and described Air conditioning system end specified sensible heat amount, obtain the described whole year by time sensible heat load and described air conditioning system end specified sensible heat amount Annual by time sensible heat load percentage ratio；According to the described whole year by time latent heat load and the specified amount of latent heat of air conditioning system end, obtain The described whole year by time latent heat load and the described specified amount of latent heat of air conditioning system end the whole year by time latent heat load percentage ratio；

Described chilled water boundary temperature computing unit, be additionally operable to according to the described whole year by time sensible heat load percentage ratio and the described whole year By time latent heat load percentage ratio determine a whole year by time chilled water boundary temperature；

The control device of described air conditioning system, also includes:

Chilled water supply water temperature determines unit, for according to the described whole year by time chilled water boundary temperature, annual bear by Shi Quanre Lotus and chilled-water flow calculate and determine chilled water supply water temperature；

Refrigerating efficiency acquiring unit, for according to the cooling water return water temperature pre-set, air conditioning system refrigeration host computer rate of load condensate Function and described chilled water supply water temperature, the refrigerating efficiency COP of acquisition air conditioning system refrigeration host computer:

$COP=\frac{273+T_{chwout}}{T_{cwin}-T_{chwout}}f\left(ld\right)$

Wherein, COP is the refrigerating efficiency of described air conditioning system refrigeration host computer；T_chwoutFor described chilled water supply water temperature；T_cwinFor Described cooling water return water temperature；F (ld) is described air conditioning system refrigeration host computer rate of load condensate function；

Refrigeration host computer energy consumption determines unit, for the operating load according to refrigeration host computer and described refrigerating efficiency, determines described system Cold main frame energy consumption, is formulated as:

E_chiller=Q₁÷COP

Wherein, E_chillerFor described refrigeration host computer energy consumption；Q₁Operating load for described refrigeration host computer；

First annual energy consumption determines unit, for according to the pump energy consumption of air conditioning system pre-set, cooling tower energy consumption and Described refrigeration host computer energy consumption, determine described chilled water mean temperature be the described whole year by time chilled water boundary temperature time air-conditioning system Unite by time energy consumption, to annual each hour by time energy consumption add up, acquire the first annual energy consumption of air conditioning system；

Second annual energy consumption acquiring unit, being used for obtaining described chilled water supply water temperature is refrigeration host computer nominal condition leaving water temperature Time the second annual energy consumption of air conditioning system；

Annual amount of energy saving determines unit, for according to the described second annual energy consumption and the described first annual energy consumption, determining described cold Freeze water mean temperature be the described whole year by time chilled water boundary temperature time the annual amount of energy saving of air conditioning system, be formulated For:

E_as=E_at,r-E_at,s

Wherein, E_asFor described annual amount of energy saving；E_at,rFor the described second annual energy consumption；E_at,sFor the described first annual energy consumption.

The control device of air conditioning system the most according to claim 8, it is characterised in that described chilled water boundary temperature calculates Unit, also includes:

3rd enquiry module, for according to the described whole year by time sensible heat load percentage ratio, obtain described air conditioning system characteristic In with the described whole year by time the 3rd minimum chilled water mean temperature corresponding to sensible heat load percentage ratio；

4th enquiry module, for according to the described whole year by time latent heat load percentage ratio, obtain described air conditioning system characteristic In with the described whole year by time the 4th minimum chilled water mean temperature corresponding to latent heat load percentage ratio；

Second contrast module, for carrying out described 3rd minimum chilled water mean temperature with the 4th minimum chilled water mean temperature By time contrast, using the minima of described 3rd minimum chilled water mean temperature and the 4th minimum chilled water mean temperature as described Annual by time chilled water boundary temperature.

The control device of air conditioning system the most according to claim 7, it is characterised in that described first computing unit, uses In:

Obtain the real-time sensible heat load of building, be formulated as:

Q=Q_t+Q_r+Q_i+Q_f

Q_t=α A₁(T_out-T_in)+βA₂(T_out-T_in)

Q_r=0.899CI

Q_i=Q_h+Q_d

Q_f=F ρ C_p(T_out-T_in)

Wherein, Q is described real-time sensible heat load；Q_tFor body of wall and the heat output of window；α is the heat transfer coefficient of body of wall；A₁For body of wall Heat transfer area；β is the heat transfer coefficient of window；A₂Heat transfer area for window；T_inFor temperature in building；T_outFor Outer Environment temperature； Q_rFor radiant heat transfer amount；C is the comprehensive shaded coefficient of window；I is solar irradiance；Q_iFor human body and the heat dissipation capacity of equipment in building Sum；Q_fFor new wind and air penetration cause refrigeration duty；F is to enter the air mass flow in building；ρ is atmospheric density；C_pFor Heat capacity of air；

Described first computing unit, is additionally operable to obtain the real-time latent heat load of building, is formulated as:

Q '=Q '_f+Q′_i

Q′_f=rF (G_out-G_in)

Wherein, Q '_fThe latent heat load caused for new wind and infiltration wind；G_outWater capacity for Outer Environment air；G_inFor building The water capacity of interior air；Q′_iThe latent heat load caused for wet dissipation such as building interior human body and plants；F is to enter the sky in building Throughput；R is the gasification latent heat of default temperature.