CN101688704A - Be used to expand the method and system of the adjusting ratio of absorption chiller - Google Patents

Abstract

A kind ofly be used for improving the method for operating of absorption chiller (10) and the circulation that system has changed cold-producing medium and/or absorbent solution with evaporimeter (12), absorber (14), generator (16) and condenser (20), with allow absorption chiller (10) low cool off and/or low demand for heat during carry out continuous operation.Overflow closed circuit (46,50,54) is configured to change the circulation of absorbent solution, and excessive absorbent solution is recycled to the absorber (14) from generator (16).Refrigerant circulation loop (34,52,58,60) is configured to change the circulation of the cold-producing medium in the evaporimeter (12), turns round when evaporimeter (12) comprises minimum cold-producing medium to avoid refrigerated medium pump (36).This absorption chiller (10) can be single-action, economic benefits and social benefits or three-effect absorption-type cooler.In certain embodiments, absorption chiller (10) can carry out heating and cooling simultaneously.

Description

Be used to expand the method and system of the adjusting ratio of absorption chiller

Background technology

[0001] disclosure relates to a kind of absorption chiller system.More particularly, the disclosure relates to the feature of the adjusting ratio that is used to expand the absorption chiller system.

[0002] absorption chiller comprises evaporimeter, absorber, generator and condenser, and it uses absorbent solution and cold-producing medium that cooling and/or heating are provided.Absorption chiller may have limited adjusting ratio, and it is the ratio of heap(ed) capacity to minimum capacity.This restriction may partly change with the confined space that is used for excessive absorbent solution in the energy heat of supplying with generator or the absorber.In addition, lower cold-producing medium level may hinder absorption chiller and obtained higher adjusting ratio in the evaporimeter.

[0003] needs improve the operation of absorption chiller system, and the adjusting that makes cooler have expansion is compared and can continued operation in wideer operating condition scope.

Summary of the invention

[0004] disclosure relates to a kind of method of operating and system that is used to improve the absorption chiller with evaporimeter, absorber, generator and condenser.The disclosure relates to the circulation that changes cold-producing medium and/or absorbent solution, to allow the continuous operation of absorption chiller during low cooling and/or low demand for heat.The overflow closed circuit is configured to change the circulation from the absorbent solution of generator, and optionally makes excessive absorbent solution be recycled to absorber from generator.Refrigerant circulation loop is configured to change the circulation of the cold-producing medium in the evaporimeter, turns round when preventing that the cold-producing medium of refrigerated medium pump in the storage tank of evaporimeter is less than minimum.Absorption chiller can be single-action, economic benefits and social benefits or three-effect absorption-type cooler.In certain embodiments, absorption chiller can carry out heating and cooling simultaneously.

Description of drawings

[0005] Fig. 1 is the schematic diagram that can expand the exemplary embodiment of the absorption chiller system that regulates ratio.

[0006] Fig. 2 is the schematic diagram of the system's part shown in Fig. 1, and its overflow line and vapour trap that has shown that use is positioned between absorber and the high-stage generator is back in the absorber excessive absorbent solution recirculation.

[0007] Fig. 3 is the schematic diagram of the system's part shown in Fig. 1, and it has shown and uses liquid level sensor to monitor the cold-producing medium level of evaporimeter inside, with the operation of control refrigerated medium pump.

The specific embodiment

[0008] Fig. 1 is the schematic diagram of absorption chiller system 10, and it comprises evaporimeter 12, absorber 14, high-stage generator 16, low stage generator 18, condenser 20, high-temperature solution heat exchanger 22, cryogenic fluid heat exchanger 24 and secondary unit 26.In the exemplary embodiment of Fig. 1, chiller system 10 is a kind of double effect absorption coolers with the ability of heating and cooling simultaneously, so system 10 can be used for building is carried out heat supply and cooling.Should understand, the method and system that is used to expand the adjusting ratio of chiller system 10 as herein described also can be applicable to the absorption chiller of any kind, including, but not limited to single-action or three-effect absorption-type cooler, be configured to only to be used to the absorption chiller that cools off and/or be disposed for the separately absorption chiller of heating and cooling.

[0009] chiller system 10 is configured to the temperature at the water source 28 that can be frozen by reduction and cooling is offered building, and this water source is by evaporimeter 12.System 10 can offer heating building simultaneously by rising thermal water source 30 temperature, and this water source is by secondary unit 26.Usually the system 10 that uses for absorption chiller also comprises cooling water loop 32, is used to make water to flow through absorber 14 and condenser 20 from cooling tower, makes cooling water be used for heat radiation.

[0010] such as known in the art, the absorption chiller system as system 10, is configured to use for example absorbent solution of lithium bromide and the cold-producing medium of for example water, in order to cooling to be provided and/or to add thermal effect.Though described chiller system 10 uses lithium bromide and water, should understand in system 10 can other combination of alternative use (for example water as absorbent and ammonia as cold-producing medium).

[0011] evaporimeter 12 is configured to receive from condenser 20 cold-producing medium (being water) of liquid form, and water is stored in the evaporimeter storage tank 34.By means of using refrigerated medium pump 36, evaporimeter 12 with water from storage tank 34 pumps to the injector 38 that is positioned evaporimeter 12 tops, or pump is in the water-dropper system of evaporimeter 12.Because chilled water 28 is by the pipe of evaporimeter 12 inside, be evaporated from the water of injector 38, and chilled water 28 has reduced temperature.As shown in the figure, system 10 is a kind of closed-loop systems, and keeps in a vacuum, and feasible water from injector 38 seethes with excitement under lower temperature.Cold-producing medium (water) moves to absorber 14 with the form of steam by arrester 40 now, absorbs water at absorber 14 by the lithium-bromide solution that concentrates that the injector 42 that is positioned at absorber 14 tops is sprayed.Utilize solution pump 44 to send the lithium-bromide solution of dilution to high-stage generator 16 then.High temperature and cryogenic fluid heat exchanger 22 and 24 send lithium-bromide solution to low stage generator 18 and transmit from low stage generator 18, heat exchanger 22 and 24 has improved the temperature of the lithium-bromide solution of the dilution that flows to generator 16, thereby and has improved the efficient of generator 16.

[0012] high-stage generator 16 is supplied with in exhaust, so that seethe with excitement from the water of lithium-bromide solution, thereby produce steam.In the exemplary embodiment of Fig. 1, exhaust is supplied to from prime mover of Microturbine or another type.The benefit of system 10 is its used heat that utilizes employed another member in the building.Should understand, can use the thermal source of other type to be used for heat energy is supplied with generator 16.For example, in alternative, generator 16 can be direct-fired, steam-heated or hot water drives.The steam that generator 16 is produced can be guided to afterwards in low stage generator 18 and the secondary unit 26.In addition, the steam from generator 16 also may rest in the overflow line 46.

[0013] from the tube side of the low stage generator 18 of the steam flow of high-stage generator 16.Lithium-bromide solution from high-stage generator 16 flows through heat exchanger 22, flows to the shell side of low stage generator 18 afterwards.Lithium-bromide solution in the generator 18 is owing to the heat of the steam transmission from the tube side of generator 18 seethe with excitement other steam then.The steam of other in the shell side of generator 18 moves in the condenser 20 by the arrester 48 that is positioned between generator 18 and the condenser 20 then.In condenser 20, cooling water 32 flows through the tube side of condenser 20.When the steam from generator 18 enters the shell side of condenser 20, the steam condensation, condensate is recycled and is back in the evaporimeter 12.

[0014] the steam condensation in the tube side of generator 18, and condensate is recycled with the condensate from condenser 20 be back in the evaporimeter 12.The lithium bromide from generator 18 that is in once more under the high concentration flows through heat exchanger 24, and recirculation is back in the absorber 14.This circulation is sprayed in absorber 14 along with the lithium bromide that concentrates and is repeated, thereby absorbs the water in the flash-pot 12.

[0015] in the exemplary embodiment of Fig. 1, because system 10 is absorption chillers of a kind of while heating and cooling, so system 10 also comprises secondary unit 26, it can be used for heating.Move to the shell side of secondary unit 26 from the steam of high-stage generator 16, steam condensation herein, thereby heat transferred is flow through the thermal water source 30 of the tube side of heat exchanger 26.After the steam condensation, liquid condensate recirculation is back in the generator 16, and it can be absorbed by the lithium-bromide solution in the generator 16 again herein.

[0016] in the shown embodiment of Fig. 1, system 10 comprises three main valve-flow dividers 70 (being also referred to as CV1), heat exchanger control valve 72 (being also referred to as CV2) and the low stage generator control valve (being also referred to as CV3) of the operation that is used for control system 10.Valve 70 (CV1) is configured to the amount of regulating the exhaust of supplying with high-stage generator 16 based on to the heating of system 10 and/or cooling requirement.Valve 72 (CV2) is configured to regulate according to demand for heat the amount of the liquid condensate in the heat exchanger 26 that recirculation is back to generator 16.Valve 74 (CV3) is configured to regulate based on the interior condition of heating and/or cooling requirement and high-stage generator 16 amount of the liquid condensate in the low stage generator 18 that recirculation is back to evaporimeter 12.System 10 also comprises bypass loop 80 and the valve 82 with heat exchanger 26 configurations in parallel.Should understand that bypass loop 80 and valve 82 not necessarily, but can be used for the operation of improvement system 10 in chiller system 10, particularly do not having under the situation of demand for heat.Should understand, compare that the absorption chiller system can comprise more or less valve according to the particular type of absorption chiller with the embodiment shown in Fig. 1.

[0017] when the cooling of system 10 or heating load is low, for example during the weather condition of the gentleness in spring or autumn, load may drop under the minimum cooling or heating efficiency of system 10, and may require system 10 to shut down or enter the recirculation " shut " mode".Externally environment temperature is relatively low, and building still has under the situation of minimum cooling requirement, the level of the lithium-bromide solution in the high-stage generator 16 may be elevated to undesirable level, and system 10 may shut down (or entering recirculation mode).This will be described in more detail below.As alternative or as additional, low cooling requirement may cause the cold-producing medium (water) in the storage tank 34 of evaporimeter 12 to reach the level that exhausts, as described below.Low cold-producing medium level in the evaporimeter storage tank 34 may cause the refrigerated medium pump 36 of evaporimeter 12 to be evacuated, and finally causes the destruction of pump 36.The absorption chiller system 10 of Fig. 1 is configured to change the circulation from the lithium-bromide solution of high-stage generator 16, and changes the circulation of the cold-producing medium in the evaporimeter 12, thereby allows the continued operation of absorption chiller system 10 during low cooling requirement.Therefore, system 10 can improve adjusting than (being the ratio of heap(ed) capacity to minimum capacity).

[0018] have low cooling requirement when building, and the air themperature of exterior circumferential from the cooling water flow supercooled water loop 32 of cooling tower, thereby is in lower temperature when still low.Cooling water increases assimilation effect in the absorber 14 in its lower temperature when the absorber 14, and the lithium-bromide solution that makes the more water of flash-pot 12 to be absorbed in the device 14 absorbs.As a result, the lithium-bromide solution that has increased the dilution of volume flows to high-stage generator 16.In addition, under low cooling load, reduced heat input (exhaust) to greatest extent to generator 16.Because it receives less energy, the less steam so the lithium-bromide solution of generator 16 from generator 16 seethes with excitement.

[0019] the steam output that reduces in assimilation effect that increases in the absorber 14 and the generator 16 all causes the lithium-bromide solution of more volume to reside in the generator 16.In the absorption system of standard, on some point,, perhaps need solution pump to stop in case when in the high-stage generator, having the solution of the liquor capacity more volume that can bear than the sluice in the generator, will need system to shut down.In addition, because the water in the absorber 14 absorbs the reduction of the steam output in increase and the generator 16, so the recirculation of less water is back to (by low stage generator 18 and condenser 20) in the evaporimeter 12.Thereby low cooling requirement also causes the cold-producing medium level in the evaporimeter storage tank 34 to reduce.If refrigerated medium pump 36 turned round in system 10 operating periods continuously, the cold-producing medium in the storage tank 34 may be not enough so, and pump 36 may not have enough net positive suction heads (NPSH), and it may cause pump 36 to be evacuated.

[0020] shown design feature intention solves the restriction of the above-mentioned low adjusting that may suppress system 10 among described herein and Fig. 1-3.Design feature comprise the overflow line 46 that is installed between high-stage generator 16 and the absorber 14, with vapour trap 50 and liquid level sensor 52 that overflow line 46 is installed in series, it is used for monitoring and controlling the cold-producing medium level of evaporimeter storage tank 34.

[0021] shown overflow line 46, vapour trap 50 and the liquid level sensor 52 that is provided in the absorption chiller system 10 of heating and cooling at the same time among Fig. 1.Should understand that pipeline 46, trap 50 and sensor 52 can be incorporated in the absorption chiller of any kind.For example, the adjustment feature of these expansions can be contained in the absorption chiller of changing between heating mode and refrigerating mode rather than be disposed for heating and cooling simultaneously.As described herein, these features are devoted to realize the continued operation of chiller system 10 during low cooling requirement.Should understand that pipeline 46, trap 50 and sensor 52 strengthen adjusting during also being used in low demand for heat.

[0022] as shown in fig. 1, overflow line 46 is connected on the generator 16.During system's 10 normal runnings (being medium paramount cooling and/or demand for heat), when steam evaporates in generator 16, and when removing from lithium-bromide solution, concentrated lithium-bromide solution flows through the sluice of generator 16 inside, flows to low stage generator 18 by heat exchanger 22 afterwards.In this, a part of steam in the generator 16 may flow in overflow line 46, secondary unit 26 and the low stage generator 18.

[0023] opposite, if low cooling requirement is arranged, comprise the lithium-bromide solution of more volume in generator 16 inside so, and produce less steam.In addition, may reduce the interior pressure of high-stage generator 16 to the low heat input of generator 16 and the lower cooling water temperature in the cooling water loop 32.The reduction of this internal pressure can hinder lithium-bromide solution and flow to low stage generator 18 from high-stage generator 16.Along with system 10 continues operation, lithium-bromide solution may continue to be elevated to inappropriate level in generator 16, makes solution be higher than level predetermined in the sluice.At certain a bit, under the condition that does not have overflow line 46, overflow may take place in lithium-bromide solution in generator 16, cause system 10 to close.

[0024] system 10 has the overflow circulation loop of absorbent, and it comprises overflow line 46, is configured to change based on the condition in the system 10 especially generator 16 circulation of absorbent solution.During the normal running of system 10, lithium-bromide solution flows to low stage generator 18 from high-stage generator 16.Yet as mentioned above, operating condition, for example low cooling requirement exists, if absorbent solution is elevated to more than the level predetermined in the sluice of high-stage generator 16, the circulation that changes lithium-bromide solution so may be necessary or useful.When lithium-bromide solution reached predetermined level in generator 16, the excessive lithium-bromide solution in the generator 16 was directed being back in the absorber 14 by overflow line 46.This allows that chiller system 10 resides in the absorbent solution that may cause more volume and continues operation under the condition in the generator 16.Because the steam from generator 16 also may reside in the overflow line 46, so system 10 comprises the vapour trap 50 between absorber 14 and generator 16, as following with reference to Fig. 2 in greater detail.

[0025] Fig. 2 is the part of overflow line 46 of Fig. 1 and the schematic diagram of vapour trap 50.As the part of circulation loop of absorbent, overflow line 46 can be used for removing excessive lithium-bromide solution from generator 16, and prevents the overflow of the absorbent solution in the device 16.Overflow line 46 is configured to make the excessive lithium-bromide solution recirculation in the generator 16 to be back in the absorber 14.

[0026] in the operating period of generator 16, overflow line 46 can only comprise steam, only comprises lithium bromide, or lithium bromide and steam.Because steam is useful energy, do not wish to allow that any steam flow back into the absorber 14 from generator 16 with absorbent solution.Vapour trap 50 is configured to allow selectively that lithium-bromide solution recirculation is back in the absorber 14, prevents that simultaneously steam is by flowing to absorber 14.

[0027] as shown in Figure 2, can be connected on the bottom 50a of vapour trap 50 from the overflow line 46 of generator 16, and can be connected to from the pipeline 54 that absorber 14 extends out on the top 50b of vapour trap 50.The excessive lithium bromide that is back in the absorber 14 by pipeline 54 recirculation can be included in the storage tank of absorber 14 afterwards.In exemplary embodiment, vapour trap 50 can be the trap of falling the bucket type.Should understand that the vapour trap of other type can alternatively be used for system 10, comprise constant temperature for example, machinery and thermodynamic (al) vapour trap.

[0028] Fig. 3 is the schematic diagram of the part of the evaporimeter 12 of Fig. 1 and absorber 14, and it has shown the refrigerant circulation loop that comprises sensor 52, in order to change the circulation of the cold-producing medium in the evaporimeter 12.Refrigerant circulation loop is configured to prevent turn round when the water of pump 36 in storage tank 34 is not enough.During system's 10 normal runnings, cold-producing medium (water) is back to the evaporimeter 12 from condenser 20 recirculation afterwards owing to the absorption of the lithium bromide in the absorber 14 continues to be removed from evaporimeter 12.As explained above, when system 10 had low cooling requirement, more cold-producing medium was absorbed in the absorber 14, and less cold-producing medium turns back in the evaporimeter 12, caused the cold-producing medium level in the evaporimeter storage tank 34 to descend.Under these conditions, when the water level in the storage tank 34 drops to floor level when following, may need to end the operation of pump 36.

[0029] as shown in Figure 3, container 56 is connected on the evaporimeter 12, and comprises liquid level sensor 52.Liquid refrigerant from condenser 20 moves to evaporimeter 12 by pipeline 58, is included in afterwards in storage tank 34 and the container 56.The level of the cold-producing medium in the container 56 is associated with cold-producing medium level in the storage tank 34.Liquid level sensor 52 is configured to detect the cold-producing medium level in the container 56.Sensor 52 comprises low level sensor 52a, high-level sensor 52b and share sensor 52c.Container 56 is arranged such that sensor 52 can be removed and change as required and easily.In a preferred embodiment, sensor 52 is connected on the controller of system 10, the operation of this controller control pump 36.In alternative, pump 36 can be based on from the signal of sensor 52 and manually control.

[0030] when detecting water level in the storage tank 34, low level sensor 52a dropped to floor level when following, signal from sensor 52a causes controller to end the operation of pump 36, and its stop liquid cold-producing medium is sent to the injector 38 from storage tank 34 via pipeline 60.In case the water level that high-level sensor 52b detects in the storage tank 34 has turned back to predetermined level, pump 36 is restarted from the signal of sensor 52b.Share sensor 52c extends to farthest in the container 56, makes that the water level in the storage tank 34 will be higher than the sensor ends of share sensor 52c all the time.Therefore, share sensor 52c is as the datum mark of sensor 52a and 52b.Should understand, in container 56, can comprise more than three sensors.

[0031], there is not liquid refrigerant to supply with the injector 38 of evaporimeter 12 in 36 down periods of pump.As a result, during pump 36 shut down, it may be brought up to more than set point in freezing water source 28.Because pump 36 can be reset after the short time cycle usually, thus minimum entire effect should be had to cooling capacity, especially under low cooling requirement.Minimum influence to cooling is more more suitable than damage pump 36 or necessary complete shutdown system 10.

[0032] in the shown exemplary embodiment of Fig. 1, chiller system 10 comprises the combination of overflow line 46 (having vapour trap 50) and liquid level sensor 52.The circulation that overflow line 46 and vapour trap 50 change from the absorbent solution of generator 16 is to allow that chiller system 10 is in low cooling or the continued operation during the demand for heat.Liquid level sensor 52 changes the circulation of the cold-producing medium in the evaporimeter 12, to allow that chiller system 10 is in low cooling or the continued operation during the demand for heat.Overflow line 46 and liquid level sensor 52 can one be used from the circulation that changes cold-producing medium and absorbent solution, so that the adjusting of increase system 10 ratio.Should understand that chiller system can comprise overflow line 46 and vapour trap 50, and get rid of liquid level sensor 52; As alternative, chiller system can comprise liquid level sensor 52, and does not have overflow line 46 and vapour trap 50.In a preferred embodiment, and in order to reach the optimum operation of absorption chiller system, overflow line, vapour trap and liquid level sensor should be used in combination.

[0033] though the present invention has been described with reference to preferred embodiment, those of skill in the art should be realized that, can change aspect form and the details under the condition that does not break away from the spirit and scope of the present invention.

Claims (36)

1. one kind is used to the system that heats and/or cool off is provided, and described system comprises:

Absorption chiller comprises:

Evaporimeter, described evaporator arrangement becomes to receive the cold-producing medium of liquid form, and makes the part evaporation of described cold-producing medium;

Absorber, described absorber is configured to comprise absorbent solution, and receives the cold-producing medium of vapor form from described evaporimeter, makes described absorbent solution absorb described cold-producing medium, to form the absorbent solution of dilution;

Generator, described generator are configured to receive the absorbent solution and the thermal source of described dilution, thereby evaporate cold-producing medium from the absorbent solution of described dilution; With

Condenser, described condenser arrangement becomes the cold-producing medium that receives vapor form from described generator, makes described condensation of refrigerant, and makes the described cold-producing medium recirculation of liquid form be back to described evaporimeter; And

Be used for changing at least one the device of circulation of described cold-producing medium and described absorbent solution, thereby carry out continuous operation during allowing at least one in low cooling requirement and low demand for heat of described absorption chiller.

2. system according to claim 1 is characterized in that, the described device that is used to change circulation comprises the overflow closed circuit, and described overflow closed circuit is configured to optionally make excessive absorbent solution to be recycled to described absorber from described generator.

3. system according to claim 2 is characterized in that, described overflow closed circuit comprises:

First group of pipeline between described absorber and described generator;

Pump, described pump are used for by described first group of pipeline the absorbent solution of described dilution being sent to described generator from described absorber;

Second group of pipeline between described generator and described absorber, described second group of pipeline is configured to receive the cold-producing medium of described absorbent solution and vapor form; With

Trap, described trap are connected on described second group of pipeline, and are configured to optionally allow that described absorbent solution flow back in the described absorber, and prevent that the cold-producing medium of described evaporation from passing through described trap.

4. system according to claim 1 is characterized in that, the described device that is used to change circulation comprises refrigerant circulation loop, and described refrigerant circulation loop is used for controlling the circulation of the described cold-producing medium of described evaporimeter.

5. system according to claim 4 is characterized in that, described refrigerant circulation loop comprises:

Storage tank in the described evaporimeter, described storage tank are used to receive and store the described cold-producing medium from the liquid form of described condenser;

Pump, described pump are configured to send described cold-producing medium in the described evaporimeter injector;

At least one sensor is used for monitoring the level of the described cold-producing medium of described storage tank, to control the operation of described pump.

6. system according to claim 5 is characterized in that, described at least one sensor comprises low level sensor, and when described low level sensor detects cold-producing medium level in the described storage tank and is lower than floor level, closes described pump.

7. system according to claim 5 is characterized in that, described at least one sensor comprises high-level sensor, and cold-producing medium level in the described storage tank is positioned at or when being higher than predetermined level, start described pump when described high-level sensor detects.

8. one kind is used to the system that heats and/or cool off is provided, and described system comprises:

Absorption chiller comprises:

Evaporimeter, described evaporator arrangement becomes to receive the cold-producing medium of liquid form, and makes the part evaporation of described cold-producing medium;

Absorber, described absorber is configured to comprise absorbent solution, and receives the described cold-producing medium of vapor form from described evaporimeter, makes described absorbent solution absorb described cold-producing medium, to form the absorbent solution of dilution;

Generator, described generator are configured to receive the absorbent solution and the thermal source of described dilution, thereby evaporate cold-producing medium from the absorbent solution of described dilution; With

Condenser, described condenser arrangement becomes the cold-producing medium that receives vapor form from described generator, makes described condensation of refrigerant, and makes the described cold-producing medium recirculation of liquid form be back to described evaporimeter; And

Closed circuit is configured to change at least one in described cold-producing medium and the described absorbent solution, and makes and can carry out continuous operation during at least one in low cooling requirement and low demand for heat of described absorption chiller.

9. system according to claim 8 is characterized in that described closed circuit is a circulation loop of absorbent, and described circulation loop of absorbent comprises:

First group of pipeline between described absorber and described generator is used for the absorbent solution of described dilution is sent to described generator from described absorber; With

Second group of pipeline between described generator and described absorber is configured to receive the described cold-producing medium of described absorbent solution and vapor form.

10. system according to claim 9 is characterized in that, described circulation loop of absorbent also comprises the trap that is connected on described second group of pipeline, and described trap is configured to optionally make described absorbent solution recirculation to get back to described absorber.

11. system according to claim 8 is characterized in that, described closed circuit is a refrigerant circulation loop, and described refrigerant circulation loop comprises:

Storage tank in the described evaporimeter is used to receive and store the described cold-producing medium from the liquid form of described condenser;

Pump, described pump are configured to send described cold-producing medium in the described evaporimeter injector; With

At least one sensor is used for monitoring the level of the cold-producing medium of described storage tank, wherein, when the cold-producing medium level in the described storage tank is lower than floor level, close described pump, when the cold-producing medium level in the described storage tank is positioned at or is higher than predetermined level, start described pump.

12. system according to claim 11 is characterized in that, described at least one sensor comprises low level sensor, and when described low level sensor detects cold-producing medium level in the described evaporimeter and is lower than floor level, closes described pump.

13. system according to claim 11, it is characterized in that, described at least one sensor comprises high-level sensor, and cold-producing medium level in the described evaporimeter is positioned at or when being higher than predetermined level, start described pump when described high-level sensor detects.

14. system according to claim 8 is characterized in that, described absorption chiller also comprises at least one solution heat exchanger, and described solution heat exchanger is configured to receive described absorbent solution.

15. system according to claim 8 is characterized in that, described absorption chiller also comprises secondary unit, and described secondary unit is configured to improve the temperature by the thermal water source of described secondary unit.

16. system according to claim 8 is characterized in that, described cold-producing medium is a water, and described absorbent solution is lithium bromide.

17. system according to claim 8 is characterized in that, described absorption chiller is the double effect absorption cooler, and comprises second generator.

18. system according to claim 8 is characterized in that, described absorption chiller is the three-effect absorption-type cooler.

19. system according to claim 8 is characterized in that, described absorption chiller is disposed for providing heating and cooling simultaneously.

20. an operation has the method for the absorption chiller of evaporimeter, absorber, generator and condenser, described method comprises:

Making cold-producing medium and absorbent solution flow through described absorption chiller provides cooling and adds at least one of pining for;

Change at least one the circulation in described cold-producing medium and the described absorbent solution, thereby make and to carry out continuous operation during at least one in low cooling requirement and low demand for heat of described absorption chiller.

21. method according to claim 20, it is characterized in that, change the level that circulation comprises the cold-producing medium in the described evaporimeter of monitoring, with the operation of control pump, described pump is configured to send cold-producing medium to the water-dropper system of described evaporimeter and at least one in the injector.

22. method according to claim 21 is characterized in that, monitors the level of the cold-producing medium in the described evaporimeter and is carried out by at least one sensor.

23. method according to claim 22 is characterized in that, described at least one sensor comprises:

Low level sensor is configured to detect the level of the cold-producing medium in the storage tank of described evaporimeter, wherein, closes described pump when described low level sensor determines that described cold-producing medium level in the described storage tank is lower than floor level; With

The high level sensor is configured to detect the level of the cold-producing medium in the described storage tank, wherein, and when described high-level sensor is determined that described cold-producing medium level in the described storage tank is positioned at or started described pump when being higher than predetermined level.

24. method according to claim 20 is characterized in that, changes circulation and comprises that the excessive absorbent solution recirculation that makes in the described generator gets back to described absorber.

25. method according to claim 24 is characterized in that, makes excessive absorbent solution recirculation get back to described absorber by providing overflow line to realize between described generator and described absorber.

26. method according to claim 25 is characterized in that, makes excessive absorbent solution recirculation get back to described absorber and comprises that the cold-producing medium that prevents vapor form flows back to described absorber.

27. an operated system that is used to improve the absorption chiller with evaporimeter, absorber, generator and condenser, described system comprises:

Pump is configured to the cold-producing medium of liquid form is sent to from the storage tank of described evaporimeter the top of described evaporimeter;

Low level sensor is configured to detect the level of the cold-producing medium in the described storage tank, wherein, closes described pump when described low level sensor determines that described cold-producing medium level in the described storage tank is lower than floor level; With

The high level sensor is configured to detect the level of the cold-producing medium in the described storage tank, wherein, and when described high-level sensor is determined that described cold-producing medium level in the described storage tank is positioned at or started described pump when being higher than predetermined level.

28. system according to claim 27 is characterized in that, described system also comprises:

Be connected to the container on the described evaporimeter, described container is configured to receive and store the part from the cold-producing medium of described condenser, wherein, described low level sensor and described high-level sensor are positioned at the inside of described container, and the level of the cold-producing medium in the described storage tank of the level of the cold-producing medium in the described container and described evaporimeter is associated.

29. system according to claim 27 is characterized in that, described system also comprises:

Overflow system is disposed for optionally allowing that the excessive absorbent solution in the described generator flows back to described absorber.

30. system according to claim 29 is characterized in that, described overflow system comprises:

Be positioned at the overflow line between described generator and the described absorber, described overflow line is configured to receive the described cold-producing medium of described absorbent solution and vapor form; With

Be connected the trap on the described overflow line, be configured to optionally make described absorbent solution can flow back into described absorber, and prevent that the cold-producing medium of described evaporation from passing through described trap.

31. an operation has the method for the absorption chiller of evaporimeter, absorber, generator and condenser, described method comprises:

Detect the level of the cold-producing medium in the storage tank of described evaporimeter;

When the level of the described cold-producing medium in the described storage tank is lower than floor level, end the operation of the pump of described evaporimeter; With

When the cold-producing medium level in the described storage tank is positioned at or is higher than predetermined level, continue the operation of described pump.

32. method according to claim 31 is characterized in that, described method also comprises:

Make the excessive absorbent solution in the described generator can flow back to described absorber.

33. an overflow system that is used to improve the operation of the absorption chiller with evaporimeter, absorber, generator and condenser, described overflow system comprises:

Be positioned at the pipeline between described generator and the described absorber, described pipeline is configured to receive steam and absorbent solution; With

Be connected to the vapour trap on the described pipeline, described vapour trap is configured to optionally allow described absorbent solution by described vapour trap and flow into described absorber, and prevents that steam from passing through described vapour trap.

34. overflow system according to claim 33 is characterized in that, described pipeline is configured to remove excessive absorbent solution from described generator, and makes described excessive absorbent solution recirculation be back to described absorber.

35. overflow system according to claim 33 is characterized in that, described overflow system also comprises:

At least one sensor is disposed for monitoring the level of the cold-producing medium in the described evaporimeter, and with the operation of control pump, described pump is configured to cold-producing medium is sent to the water-dropper system of described evaporimeter and at least one in the injector.

36. an improvement has the method for operating of the absorption chiller of evaporimeter, absorber, generator and condenser, described method comprises:

When having excessive absorbent solution in the described generator, guide the absorbent solution in the described generator to flow back into described absorber; With

Prevent that vapor stream from getting back to described absorber.

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