CN214665328U - Evaporation type water chilling unit - Google Patents
Evaporation type water chilling unit Download PDFInfo
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- CN214665328U CN214665328U CN202120118383.8U CN202120118383U CN214665328U CN 214665328 U CN214665328 U CN 214665328U CN 202120118383 U CN202120118383 U CN 202120118383U CN 214665328 U CN214665328 U CN 214665328U
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- heat exchanger
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- cold source
- inlet
- outlet
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 38
- 238000001704 evaporation Methods 0.000 title abstract description 12
- 230000008020 evaporation Effects 0.000 title abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 90
- 238000005057 refrigeration Methods 0.000 claims abstract description 59
- 230000006835 compression Effects 0.000 claims abstract description 33
- 238000007906 compression Methods 0.000 claims abstract description 33
- 239000000498 cooling water Substances 0.000 claims abstract description 32
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 13
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims description 4
- 239000008400 supply water Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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Abstract
The utility model provides an evaporation formula cooling water set, evaporation formula cooling water set includes: the evaporator is communicated with a compression refrigeration loop and a natural cold source loop; the compression refrigeration loop comprises a compressor, a first heat exchanger and an expansion valve; the natural cold source loop comprises a cooling water pump and a second heat exchanger; and the cooling chamber is internally provided with a cooling fan, the first heat exchanger and the second heat exchanger are arranged in the cooling chamber, and the cooling fan is configured to increase the air volume flowing through the first heat exchanger and/or the second heat exchanger. The utility model discloses an evaporation formula cooling water set can realize utilizing the nature cold source under the low ambient temperature operating mode, utilizes the compressor refrigeration under the high temperature operating mode, then adopts compression refrigeration and self-heating cold source refrigeration to move simultaneously in transition season, saves cooling water set's energy resource consumption. The compression refrigeration and natural cold source refrigeration heat exchanger is designed in the same chamber, and the cooling fan can simultaneously work for the compression refrigeration and the natural cold source refrigeration, so that the energy efficiency level of the whole machine is improved.
Description
Technical Field
The utility model belongs to the technical field of refrigeration plant, concretely relates to evaporation formula cooling water set.
Background
The evaporation water chilling unit has more and more market demands due to huge potential in the aspect of energy efficiency, but because the evaporation water chilling unit needs to be refrigerated all the year round, the consumed energy is higher, and because the compressor refrigeration equipment runs all the year round, the reliability cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model is to utilize natural cold source under can realizing low ambient temperature operating mode, utilize the compressor refrigeration under the high temperature operating mode to an evaporation formula cooling water set is provided.
In order to solve the above problem, the utility model provides an evaporative water chilling unit, include:
the evaporator is communicated with a compression refrigeration loop and a natural cold source loop;
the compression refrigeration loop comprises a compressor, a first heat exchanger and an expansion valve; the natural cold source loop comprises a cooling water pump and a second heat exchanger;
and the cooling chamber is internally provided with a cooling fan, the first heat exchanger and the second heat exchanger are arranged in the cooling chamber, and the cooling fan is configured to increase the air volume flowing through the first heat exchanger and/or the second heat exchanger.
The purpose of the utility model and the technical problem thereof can be further realized by adopting the following technical measures.
In some embodiments, the first heat exchanger comprises at least one evaporative condenser comprising a shell and tube heat exchanger, a spray device configured to spray moisture onto the shell and tube heat exchanger.
In some embodiments, the spray device includes a circulation pump configured to supply water to the spray device.
In some embodiments, the second heat exchanger includes at least one cooling coil configured to cool the cooling medium in the natural cold source loop.
In some embodiments, there is at least one cooling fan, each cooling fan corresponding to at least one evaporative condenser and at least one cooling coil.
In some embodiments, the natural cold source loop includes a plate heat exchanger, the plate heat exchanger includes a first inlet, a first outlet, a second inlet, and a second outlet, the first inlet and the first outlet are communicated, the second inlet and the second outlet are communicated, the first inlet is connected to a chilled water inlet end, the first outlet is communicated to the natural cold source inlet of the evaporator, the second outlet is connected to an inlet of the cooling coil through a cooling water pump, an outlet of the cooling coil is communicated to the second inlet, and a circulation loop formed by the second outlet, the cooling water pump, the cooling coil, and the second inlet circulates a cold-carrying medium.
In some embodiments, the cold carrier medium comprises a glycol solution.
The utility model provides an evaporation formula cooling water set has following beneficial effect at least:
the utility model discloses an evaporation formula cooling water set has compression refrigeration and the dual cooling function of natural cold source refrigeration, can realize utilizing the natural cold source under the low ambient temperature operating mode, utilizes the compressor refrigeration under the high temperature operating mode, then adopts compression refrigeration and from the operation simultaneously of heat cold source refrigeration in transition season, saves cooling water set's energy resource consumption. The compression refrigeration and natural cold source refrigeration heat exchanger is designed in the same chamber, and the cooling fan can simultaneously perform compression refrigeration and natural cold source refrigeration work, so that the heat exchange efficiency is improved and the energy efficiency level of the whole machine is improved by increasing the air quantity flowing through the heat exchanger.
Drawings
Fig. 1 is a schematic structural diagram of an evaporative water chilling unit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of COP curves according to an embodiment of the present invention.
The reference numerals are represented as:
1. a compressor; 2. an evaporative condenser; 3. an expansion valve; 4. an evaporator; 5. a plate heat exchanger; 6. A circulation pump; 7. a cooling water pump; 8. a cooling coil; 9. a cooling fan; 10. a first inlet; 11. a first outlet; 12. a second inlet; 13. a second outlet.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides an evaporative water chilling unit, including: the evaporator 4 is communicated with a compression refrigeration loop and a natural cold source loop; the compression refrigeration loop comprises a compressor 1, a first heat exchanger and an expansion valve 3; the natural cold source loop comprises a cooling water pump 7 and a second heat exchanger; and a cooling chamber in which a cooling fan 9 is arranged, the first heat exchanger and the second heat exchanger are arranged in the cooling chamber, and the cooling fan 9 is configured to increase the air volume flowing through the first heat exchanger and/or the second heat exchanger.
The utility model discloses an evaporation formula cooling water set has compression refrigeration and the dual cooling function of natural cold source refrigeration, can realize utilizing the natural cold source under the low ambient temperature operating mode, utilizes compressor 1 refrigeration under the high temperature operating mode, then adopts compression refrigeration and from the operation simultaneously of heat cold source refrigeration in transition season, saves cooling water set's energy resource consumption. The cooling fan 9 can simultaneously perform compression refrigeration and natural cold source refrigeration, and the heat exchange efficiency and the energy efficiency level of the whole machine are improved by increasing the air quantity flowing through the heat exchanger.
In some embodiments, the first heat exchanger comprises at least one evaporative condenser 2, the at least one evaporative condenser 2 comprising a shell and tube heat exchanger, a spray device configured to spray moisture onto the shell and tube heat exchanger. The shell and tube heat exchanger is matched with the spraying device, so that the heat exchange efficiency of the shell and tube heat exchanger is improved.
In some embodiments, the spray device comprises a circulation pump 6, the circulation pump 6 being configured to supply water to the spray device. The circulating pump 6 improves the water supply performance of the spraying device and ensures the heat exchange efficiency of the shell-and-tube heat exchanger.
In some embodiments, the second heat exchanger includes at least one cooling coil 8, the cooling coil 8 configured to cool the cooling medium in the natural cold source loop. The refrigeration of the natural cold source cools the circulating secondary refrigerant through the cooling coil 8, reduces the temperature of the chilled water flowing through the evaporator 4, and increases the refrigeration capacity of the refrigeration of the natural cold source.
In some embodiments, there is at least one cooling fan 9, and each cooling fan 9 corresponds to at least one evaporative condenser 2 and at least one cooling coil 8. This embodiment is through carrying out the heat dissipation cooling for evaporative condenser 2 and cooling coil 8 simultaneously at a cooling blower 9, the efficiency level of the promotion complete machine of maximize.
In some embodiments, the natural cold source loop includes a plate heat exchanger 5, the plate heat exchanger 5 includes a first inlet 10, a first outlet 11, a second inlet 12, and a second outlet 13, the first inlet 10 and the first outlet 11 are communicated, the second inlet 12 and the second outlet 13 are communicated, the first inlet 10 is connected to a chilled water inlet, the first outlet 11 is communicated to the natural cold source inlet of the evaporator 4, the second outlet 13 is connected to the inlet of the cooling coil 8 through the cooling water pump 7, the outlet of the cooling coil 8 is communicated to the second inlet 12, and a circulation loop formed by the second outlet 13, the cooling water pump 7, the cooling coil 8, and the second inlet 12 circulates a cold carrying medium. Chilled water circulates along a loop of a first inlet 10, a plate heat exchanger 5, a first outlet 11, an evaporator 4 and the first inlet 10, a cold-carrying medium circulates along a loop of a cooling water pump 7, a cooling coil 8, a second inlet 12, the plate heat exchanger 5, a second outlet 13 and the cooling water pump 7, the chilled water and the cold-carrying medium exchange heat in the plate heat exchanger 5, firstly, the cooling coil 8 absorbs external environment cold into the cold-carrying medium, the cold-carrying medium carries the cold to the plate heat exchanger 5 and transmits the cold to the chilled water in the plate heat exchanger 5, and the chilled water carries the cold to the evaporator 4 to finish refrigeration of a natural cold source.
In some embodiments, the cold carrier medium comprises a glycol solution. The glycol solution as the secondary refrigerant has the advantages of large cold requirement and quick heat exchange.
Referring to fig. 2, this embodiment provides a control method using the evaporative water chilling unit, including:
and when T is more than T1, the component operates in a high ambient temperature condition. A compression refrigeration circulation mode is operated, and refrigeration capacity is supplied to the evaporator 4 through a compression refrigeration loop; the refrigerant runs through a circulation loop formed by the compressor 1, the evaporative condenser 2, the expansion valve 3 and the compressor 1, and 100% of output is output for running; at this time, the natural cooling circulation circuit is stopped and closed.
In some embodiments, the chilled water may be passed through the first inlet 10-plate heat exchanger 5-first outlet 11-evaporator 4-chilled water outlet; and performing cold compensation on the compression refrigeration cycle.
Component operation control mode: the circulating pump 6, the cooling fan 9, the compressor 1 and the expansion valve 3 are opened, and the cooling water pump 7 is closed.
When T1 is more than T2, the unit operates in a transition season working condition. Simultaneously operating a compression refrigeration circulation mode and a natural cooling circulation mode, and supplying cold energy to the evaporator 4 through a compression refrigeration loop and a natural cold source loop;
natural cooling circulation mode: a cold-carrying medium (glycol solution) runs at 100% output power through a cooling water pump 7-cooling coil 8-plate heat exchanger 5-cooling water pump 7 circulation loop;
compression refrigeration cycle mode: the refrigerant operation is a circulation loop formed by a compressor 1, an evaporative condenser 2, an electronic expansion valve 3, an evaporator 4 and the compressor 1, and the refrigerant operation is controlled to operate at partial load output power in an interval range of 0-25% -50% -75% -100% by frequency conversion; the chilled water is discharged through the first inlet 10, the plate heat exchanger 5, the first outlet 11, the evaporator 4 and the chilled water, and natural cooling circulation cold energy is conveyed.
Component operation control mode: and the cooling fan 9, the cooling water pump 7 and the plate heat exchanger 5 are started, and the circulating pump 6, the compressor 1 and the expansion valve 3 perform frequency conversion partial load operation.
And when T is less than or equal to T2, the unit operates under the working condition of low ambient temperature. A natural cooling circulation mode is operated, and cold energy is supplied to the evaporator 4 through a natural cold source loop;
natural cooling circulation mode: a cold-carrying medium (glycol solution) runs at 100% output power through a cooling water pump 7-cooling coil 8-plate heat exchanger 5-cooling water pump 7 circulation loop; at this time, the compression refrigeration cycle is stopped and closed. The chilled water is discharged through the first inlet 10, the plate heat exchanger 5, the first outlet 11, the evaporator 4 and the chilled water, and natural cooling circulation cold energy is conveyed.
Component operation control mode: the cooling fan 9, the cooling water pump 7 and the plate heat exchanger 5 are started, and the circulating pump 6, the compressor 1 and the expansion valve 3 are closed; the cooling water pump 7 is used as a power source, heat in the plate heat exchanger 5 is transported to the outdoor cooling coil 8 side through a natural cooling circulation cold carrying medium (glycol solution), and is discharged outdoors through the cooling fan 9, so that refrigeration is realized.
Wherein T is the ambient temperature, T1 is the first preset temperature, T2 is the second preset temperature, and T1 > T2. Preferably, T1 is 15 ℃ and T2 is 2 ℃.
In some embodiments, simultaneously operating the compression refrigeration cycle mode, the free cooling cycle mode comprises: and controlling the working frequency of the cooling fan according to COP curves of the compression refrigeration loop and the natural cold source loop.
Under the working condition of a transition season, the natural cooling circulation mode is preferred under the condition that the cold load demand is lower. The refrigeration capacity can not meet the set requirement or the outlet water temperature of the chilled water can not meet the set requirement, the compression refrigeration circulation mode is started, but the air chambers of the refrigeration mode and the natural cooling mode of the compressor 1 are the same. The air volume of the fan is large in the 100% natural cooling mode, the power consumption of the fan is large and is 2-4 times of the air volume of the fan in the compressor 1 machine cooling mode, and the power of the fan is low. The compression refrigeration mode is prioritized at high temperature, so that the overall energy consumption is prevented from being overlarge.
Meanwhile, the problem of landscape caused by the fact that spray water flows out along with the cooling fan 9 in the compression refrigeration circulation mode of section operation when the air quantity of the cooling fan 9 is too large in the natural cooling circulation mode of priority operation is prevented.
The running of the unit is guided and controlled by the COP optimal energy efficiency curve, the problem of no floating water is solved, and under the same cooling capacity, the running frequency of the cooling fan 9 is adjusted according to the natural cooling mode or the cooling mode of the compressor 1 is adjusted.
In some embodiments, the step of controlling the working frequency of the evaporative water chilling unit according to the COP curve of the compression refrigeration circuit and the natural cold source circuit comprises: and determining an optimal energy efficiency point in the COP curve, taking the temperature corresponding TO the optimal energy efficiency point as a reference temperature TO, when T is less than or equal TO TO, operating the cooling fan at the working frequency meeting the output power requirement of the natural cold source loop, and when T is more than TO, operating the cooling fan at the working frequency meeting the output power requirement of the compression refrigeration loop.
Examples are: at 10 ℃, a is the optimal energy efficiency point, B is the water flying point of the compressor 1 during the cooling operation, and B may be on the left side or the right side of a due to different working conditions and loads.
And when the point B is on the right side of the point A, preferentially operating the mode with the highest energy efficiency, namely controlling the cooling fan to operate at the working frequency meeting the output power requirement of the compression refrigeration loop.
And when the point B is on the left side of the point A, the operation mode of no water flying is preferentially ensured, and the cooling fan operates at the working frequency meeting the output power requirement of the natural cold source loop.
Therefore, the problems that the running energy consumption of the fan is high and the energy-saving effect of the whole machine is poor due to the fact that the cooling fan runs at a large working frequency required by natural cooling circulation all the time in a transition season of the evaporative water chilling unit with the natural cooling circulation can be solved.
The utility model discloses a control method can carry out the operation of optimizing of best efficiency under different operating modes and the operational mode, and the high-efficient operation of full operating mode, full ring temperature is realized to the refrigeration proportion of adjustment compressor 1 refrigeration cycle and natural cooling circulation.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. An evaporative water chilling unit, comprising:
the evaporator (4) is communicated with a compression refrigeration loop and a natural cold source loop;
the compression refrigeration loop comprises a compressor (1), a first heat exchanger and an expansion valve (3); the natural cold source loop comprises a cooling water pump (7) and a second heat exchanger;
a cooling chamber, wherein a cooling fan (9) is arranged in the cooling chamber, the first heat exchanger and the second heat exchanger are arranged in the cooling chamber, and the cooling fan (9) is configured to increase the air quantity flowing through the first heat exchanger and/or the second heat exchanger.
2. The evaporative water chilling unit according to claim 1, wherein the first heat exchanger comprises at least one evaporative condenser (2), the at least one evaporative condenser (2) comprising a shell and tube heat exchanger, a spray device configured to spray moisture onto the shell and tube heat exchanger.
3. Evaporative water chilling unit according to claim 2, characterized in that the spray device comprises a circulation pump (6), the circulation pump (6) being configured to supply water to the spray device.
4. The evaporative water chilling unit according to claim 1, wherein the second heat exchanger includes at least one cooling coil (8), the cooling coil (8) being configured to cool down and dissipate heat from the cooling medium in the natural cold source circuit.
5. Evaporative water chilling unit according to claim 4, characterised in that the number of cooling fans (9) is at least one, each cooling fan (9) corresponding to at least one evaporative condenser (2) and at least one cooling coil (8).
6. The evaporative water chilling unit according to claim 4, wherein the natural cold source loop comprises a plate type heat exchanger (5), the plate type heat exchanger (5) comprises a first inlet (10), a first outlet (11), a second inlet (12) and a second outlet (13), the first inlet (10) and the first outlet (11) are communicated, the second inlet (12) and the second outlet (13) are communicated, the first inlet (10) is connected with a chilled water inlet end, the first outlet (11) is communicated to the natural cold source inlet of the evaporator (4), the second outlet (13) is connected to the inlet of the cooling coil (8) through a cooling water pump (7), the outlet of the cooling coil (8) is communicated to the second inlet (12), and the second outlet (13), the cooling water pump (7), the cooling coil (8), The circulation circuit formed by the second inlet (12) is circulated with the cooling medium.
7. The evaporative water chilling unit according to claim 6, wherein the cold carrying medium includes a glycol solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120118383.8U CN214665328U (en) | 2021-01-15 | 2021-01-15 | Evaporation type water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120118383.8U CN214665328U (en) | 2021-01-15 | 2021-01-15 | Evaporation type water chilling unit |
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| Publication Number | Publication Date |
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| CN214665328U true CN214665328U (en) | 2021-11-09 |
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| CN202120118383.8U Active CN214665328U (en) | 2021-01-15 | 2021-01-15 | Evaporation type water chilling unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682976A (en) * | 2021-01-15 | 2021-04-20 | 珠海格力电器股份有限公司 | Evaporative water chilling unit and control method thereof |
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2021
- 2021-01-15 CN CN202120118383.8U patent/CN214665328U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682976A (en) * | 2021-01-15 | 2021-04-20 | 珠海格力电器股份有限公司 | Evaporative water chilling unit and control method thereof |
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