CN102620364A - Indirect cooling water storage air-conditioning system and operation method of indirect cooling water storage air-conditioning system - Google Patents
Indirect cooling water storage air-conditioning system and operation method of indirect cooling water storage air-conditioning system Download PDFInfo
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- CN102620364A CN102620364A CN2012100975036A CN201210097503A CN102620364A CN 102620364 A CN102620364 A CN 102620364A CN 2012100975036 A CN2012100975036 A CN 2012100975036A CN 201210097503 A CN201210097503 A CN 201210097503A CN 102620364 A CN102620364 A CN 102620364A
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Abstract
The invention discloses an indirect cooling water storage air-conditioning system. The water storage air-conditioning system comprises a cold accumulation refrigeration host, a cold accumulation water tank, a plate heat exchanger, a direct cooling refrigeration host, an air-conditioning tail end, a cold accumulation pump, a cold release pump, a cooling pump and a chilled water pump, wherein electrically operated valves F2 and F1 are respectively arranged on outlet pipelines of the cold accumulation refrigeration host and the cold accumulation water tank; the second inlet pipeline on the plate heat exchanger is provided with an electric control valve V3; the first outlet pipeline on the plate heat exchanger is provided with an electrically operated valve and an outlet water temperature sensor T1; the inlet pipeline of the chilled water pump is provided with a mixed water temperature sensor T2; a bypass pipe on the inlet pipeline of the chilled water pump is connected with the first outlet formed on the plate heat exchanger; and the bypass pipe is provided with an electrically operated valve F5. The invention also discloses an operation method of the indirect cooling water storage air-conditioning system. According to the indirect cooling water storage air-conditioning system and the operation method thereof, the utilization rate of the cold accumulation water tank is improved, and the energy efficiency of secondary side direct cooling refrigeration host of the plate heat exchanger is improved.
Description
Technical field
The present invention relates to water chilling air conditioning system technical field, is the technology of a kind of indirect cooling formula water chilling air conditioning system and operation method thereof specifically.
Background technology
The water cold accumulation air-conditioner is meant and utilizes valley power that cold is stored in the cold-storage groove, a kind of technology that when peak of power consumption, discharges cold again.Along with the positive enforcement of power department time-of-use tariffs, the water cold-storage is used as the cold-storage mode of economy more and more widely, and water cold-storage technology is also increasingly mature.
Indirect cooling formula chilled water storage system is used comparatively general in the air conditioner water cold accumulation system, and indirect cooling formula chilled water storage system commonly used is as shown in Figure 1, and heavy line partly is an operating loop, and there is following problem in this system:
1) mesolimnion in the cold-storage tank is released when cold, when the plate exchanger secondary side leaving water temperature does not reach design temperature T1, can not utilize again, causes in the cold-storage tank mesolimnion not use up, and has reduced the utilization rate of cold-storage tank.
2) do not improve of the measure of the direct cooling of plate exchanger secondary side with the refrigeration host computer efficiency.
Summary of the invention
The purpose of this invention is to provide a kind of energy-conserving and environment-protective; The indirect cooling formula water chilling air conditioning system and the operation method thereof of ability overall improved system efficient; Effectively improve the utilization rate of cold-storage tank, simultaneously, improve the efficiency of the direct cooling of plate exchanger secondary side with refrigeration host computer.
The present invention realizes through following technical scheme.
A kind of indirect cooling formula water chilling air conditioning system; Comprise cold-storage with refrigeration host computer, cold-storage tank, plate type heat exchanger, directly cooling with refrigeration host computer, air conditioning terminal, cold-storage pump, release cold pump, cooling pump and chilled water pump; Directly cooling is connected with the chilled water delivery side of pump with the inlet of refrigeration host computer; Cold-storage is connected with the cold-storage delivery side of pump with the inlet of refrigeration host computer; It is characterized in that: be provided with cold-storage group heat exchanger channels and cooling group heat exchanger channels in the said plate type heat exchanger; On plate type heat exchanger, be provided with first inlet and first outlet, second inlet and second outlet, first inlet is connected with the cooling group heat exchanger channels of first outlet through plate type heat exchanger; Second inlet is connected with the cold-storage group heat exchanger channels of second outlet through plate type heat exchanger; First inlet of said plate type heat exchanger is connected with the cooling delivery side of pump, second inlet of plate type heat exchanger with release cold delivery side of pump and be connected, direct cooling is with first export pipeline of the export pipeline of refrigeration host computer and plate type heat exchanger and connect and then be connected with the entrance pipe of air conditioning terminal; The entrance pipe of chilled water pump is connected with the export pipeline of air conditioning terminal with cooling pump intake piping road and after connecing; Cold-storage is with the export pipeline of the export pipeline of refrigeration host computer and cold-storage tank and connect the back and is connected with the inlet of releasing cold pump, and the entrance pipe of cold-storage pump intake piping road and cold-storage tank also connects back the outlet with second of plate type heat exchanger and is connected, and on the export pipeline of said cold-storage with refrigeration host computer motor-driven valve F2 is installed; Motor-driven valve F1 is installed on the export pipeline of cold-storage tank; On second entrance pipe of plate type heat exchanger electric control valve V3 is installed, motor-driven valve F4 and leaving water temperature sensor T1 are installed on first export pipeline of plate type heat exchanger, the entrance pipe of chilled water pump is equipped with mixing water temperature sensor T2; The entrance pipe of said chilled water pump is provided with bypass pipe and is connected with first outlet that plate type heat exchanger is provided with, and on bypass pipe, is provided with motor-driven valve F5.
The said setting that utilizes bypass pipe through mesolimnion; By the cold-storage tank, release the cold-storage tank that cold pump, plate type heat exchanger, motor-driven valve F1, electric control valve V3 connect into and release cold loop; When closing motor-driven valve F4; Cold is given the backwater of air conditioning terminal higher temperature in the cold-storage tank through the plate type heat exchanger indirect transfer; Chilled water in the said cold-storage tank is through the backwater of plate type heat exchanger indirect transfer to the air conditioning terminal higher temperature, and its mixing temperature T2 is lower than the return water temperature of air conditioning terminal, and mixed water gets into cold-storage and uses refrigeration host computer; Cold-storage unloads with refrigeration host computer, and wherein plate type heat exchanger, motor-driven valve F1, direct cooling connect into plate type heat exchanger system loop with refrigeration host computer, chilled water pump, cooling pump.
A kind of said indirect cooling formula water chilling air conditioning system operation method is characterized in that:
1) cold-storage is used the refrigeration host computer operating condition: motor-driven valve F1, motor-driven valve F2 open, and cold-storage is with refrigeration host computer, cold-storage pump operation.When cold-storage tank cold-storage temperature reached, cold-storage finished;
2) cold-storage groove cooling operating condition: motor-driven valve F1 opens, and releases cold pump and opens, and electric control valve V3 regulates according to plate exchanger secondary side cooling design temperature T1; To keep constant cooling temperature, the cooling pump always supplies the pressure reduction of return pipe to carry out variable frequency adjustment according to end system cooling loop, to reach energy-conservation effect; When the cold-storage tank is released when being chilled to mesolimnion and surpassing cooling temperature T1 aspect; This operating mode stops, and wherein mesolimnion is meant that in the cold-storage tank, cold water is positioned at the bottom of cold-storage tank; Warm water is positioned at the top of cold-storage tank, and mesolimnion is meant the transition zone between cold water and warm water;
3) mesolimnion utilizes operating condition in the cold-storage tank: release when being chilled to mesolimnion and can not making cooling temperature T1 reach setting value through plate type heat exchanger when the cold-storage tank, move this pattern, under this pattern; The cold-storage tank still continues cooling, and motor-driven valve F1 opens, and releases cold pump and opens; With the low-limit frequency operation, increase the tank temperature difference, chilled water pump is opened with refrigeration host computer with direct cooling; Open motor-driven valve F5; Close motor-driven valve F4, the cooling pump carries out Flow-rate adjustment according to design temperature T2, and this moment, mixing temperature T2 was lower than the return water temperature of air conditioning terminal; Mixing water gets into direct cooling and is cooled to cooling temperature with refrigeration host computer, makes direct cooling be offloaded to efficient running status with refrigeration host computer.
The present invention compared with prior art has the following advantages.
Adopt technical scheme of the present invention; Particularly on the entrance pipe of chilled water pump is provided with bypass pipe and plate type heat exchanger, being provided with first outlet is connected; On bypass pipe, be provided with motor-driven valve F5, release under the cold operation pattern at the cold-storage tank like this, when the plate exchanger secondary side leaving water temperature does not reach design temperature T1; Open mesolimnion and utilize the valve F5 on the bypass pipe; Valve-off F4 makes the plate exchanger secondary side water outlet mix the back direct cooling of entering with the air conditioning terminal backwater and freezes with handpiece Water Chilling Units, resupplies end.At this moment, the operation of plate exchanger secondary side cooling pump frequency conversion makes temperature T 2 reach constant setting value, so that directly cooling is in efficient operating condition with the refrigeration host computer unloading.It is thus clear that the present invention has improved the utilization rate of cold-storage tank, simultaneously,, improved the efficiency of the direct cooling of plate exchanger secondary side with refrigeration host computer through to thermoclinic utilization in the cold-storage tank.
Description of drawings
Fig. 1 is the functional-block diagram of the indirect cooling formula of prior art water chilling air conditioning system;
The functional-block diagram of the indirect cooling formula of Fig. 2 the present invention water chilling air conditioning system;
The operation logic block diagram of the indirect cooling formula of Fig. 3 the present invention water chilling air conditioning system.
The specific embodiment
Below in conjunction with accompanying drawing the indirect cooling formula of the present invention water chilling air conditioning system is described in further detail.
Like Fig. 2, Fig. 3; The indirect cooling formula of the present invention water chilling air conditioning system; Comprise cold-storage with refrigeration host computer 1, cold-storage tank 2, plate type heat exchanger 3, directly cooling with refrigeration host computer 4, air conditioning terminal 5, cold-storage pump 6, release cold pump 7, cooling pump 8 and chilled water pump 9; Directly cooling is connected with the outlet of chilled water pump 9 with the inlet of refrigeration host computer 4; Cold-storage is connected with the outlet of cold-storage pump 6 with the inlet of refrigeration host computer 1, in plate type heat exchanger 3, is provided with cold-storage group heat exchanger channels and cooling group heat exchanger channels, on plate type heat exchanger 3, is provided with first inlet and first outlet; Second inlet and second outlet; First inlet is connected with the cooling group heat exchanger channels of first outlet through plate type heat exchanger 3, and second inlet is connected with the cold-storage group heat exchanger channels of second outlet through plate type heat exchanger 3, and first inlet of plate type heat exchanger 3 is connected with the outlet of cooling pump 8; Second inlet of plate type heat exchanger 3 is connected with the outlet of releasing cold pump 7; Directly cooling is with first export pipeline of the export pipeline of refrigeration host computer 4 and plate type heat exchanger 3 and connect the back and be connected with the entrance pipe of air conditioning terminal 5, the entrance pipe of the entrance pipe of chilled water pump 9 and cooling pump 8 and connect after be connected with the export pipeline of air conditioning terminal 5, cold-storage is with the export pipeline of the export pipeline of refrigeration host computer 1 and cold-storage tank 2 and connect and then be connected with the inlet of releasing cold pump 7; The entrance pipe of the entrance pipe of cold-storage pump 6 and cold-storage tank 2 also connects the back and exports with second of plate type heat exchanger 3 and be connected; On the export pipeline of cold-storage, motor-driven valve F2 is installed, motor-driven valve F1 is installed on the export pipeline of cold-storage tank 2, on second entrance pipe of plate type heat exchanger 3 electric control valve V3 is installed with refrigeration host computer 1; Motor-driven valve F4 and leaving water temperature sensor T1 are installed on first export pipeline of plate type heat exchanger 3, and the entrance pipe of chilled water pump 9 is equipped with mixing water temperature sensor T2.
On the entrance pipe of chilled water pump 9 is provided with bypass pipe 10 and plate type heat exchanger 3, be provided with first outlet and be connected, on bypass pipe 10, be provided with motor-driven valve F5.Utilize the setting of bypass pipe 10 through mesolimnion; By cold-storage tank 2, release the cold-storage tank that cold pump 7, plate type heat exchanger 3, motor-driven valve F1, electric control valve V3 connect into and release cold loop; When closing motor-driven valve F4; Cold is given the backwater of air conditioning terminal 5 higher temperatures in the cold-storage tank 2 through plate type heat exchanger 3 indirect transfer; Chilled water in the cold-storage tank 2 is through the backwater of plate type heat exchanger 3 indirect transfer to air conditioning terminal 5 higher temperatures, and its mixing temperature T2 is lower than the return water temperature of air conditioning terminal 5, and mixed water gets into cold-storage with refrigeration host computer 1; Cold-storage is with refrigeration host computer 1 unloading, and wherein plate type heat exchanger 3, motor-driven valve F1, direct cooling connect into plate type heat exchanger system loop with refrigeration host computer 4, chilled water pump 9, cooling pump 8.Wherein release cold pump 7 and be also referred to as plate type heat exchanger primary side cooling pump; Cooling pump 8 is called plate exchanger secondary side cooling pump; The temperature T 1 of leaving water temperature sensor T1 is called plate exchanger secondary side cooling design temperature T1, and direct cooling is called the direct cooling of plate exchanger secondary side with refrigeration host computer and uses refrigeration host computer.
Like Fig. 3, heavy line partly is an operating loop, and the operation method of the indirect cooling formula of the present invention water chilling air conditioning system is following:
1) cold-storage is used the refrigeration host computer operating condition: motor-driven valve F1, motor-driven valve F2 open, and cold-storage is with refrigeration host computer 1,6 operations of cold-storage pump, and when cold-storage tank cold-storage temperature reached, cold-storage finished;
2) cold-storage groove cooling operating condition: motor-driven valve F1 opens, and releases cold pump 7 and opens, and electric control valve V3 regulates according to plate type heat exchanger 3 secondary side cooling design temperature T1; To keep constant cooling temperature, cooling pump 8 always supplies the pressure reduction of return pipe to carry out variable frequency adjustment according to end system cooling loop, to reach energy-conservation effect; When cold-storage tank 2 is released when being chilled to mesolimnion and surpassing cooling temperature T1 aspect; This operating mode stops, and wherein mesolimnion is meant that in the cold-storage tank 2, cold water is positioned at the bottom of cold-storage tank 2; Warm water is positioned at the top of cold-storage tank 2, and mesolimnion is meant the transition zone between cold water and warm water;
3) mesolimnions utilize operating condition in the cold-storage tank 2: release when being chilled to mesolimnion and can not making cooling temperature T1 reach setting value through plate type heat exchanger 3 when cold-storage tank 2, move this pattern, under this pattern; Cold-storage tank 2 still continues cooling, and motor-driven valve F1 opens, and releases cold pump 7 and opens; With the low-limit frequency operation, increase the tank temperature difference, chilled water pump 9 is opened with refrigeration host computer 4 with direct cooling; Open motor-driven valve F5; Close motor-driven valve F4, cooling pump 8 carries out Flow-rate adjustment according to design temperature T2, and this moment, mixing temperature T2 was lower than the return water temperature of air conditioning terminal 5; Mixing water gets into direct cooling and is cooled to cooling temperature with refrigeration host computer 4, makes direct cooling be offloaded to efficient running status with refrigeration host computer 4.
Claims (3)
1. indirect cooling formula water chilling air conditioning system; Comprise cold-storage with refrigeration host computer (1), cold-storage tank (2), plate type heat exchanger (3), directly cooling with refrigeration host computer (4), air conditioning terminal (5), cold-storage pump (6), release cold pump (7), cooling pump (8) and chilled water pump (9); Directly cooling is connected with the outlet of chilled water pump (9) with the inlet of refrigeration host computer (4); Cold-storage is connected with the outlet of cold-storage pump (6) with the inlet of refrigeration host computer (1), it is characterized in that: be provided with cold-storage group heat exchanger channels and cooling group heat exchanger channels in the said plate type heat exchanger (3), on plate type heat exchanger (3), be provided with first inlet and first outlet; Second inlet and second outlet; First inlet is connected with the cooling group heat exchanger channels of first outlet through plate type heat exchanger (3), and second inlet is connected with the cold-storage group heat exchanger channels of second outlet through plate type heat exchanger (3)
First inlet of said plate type heat exchanger (3) is connected with the outlet of cooling pump (8); Second inlet of plate type heat exchanger (3) is connected with the outlet of releasing cold pump (7); Directly cooling is with first export pipeline of the export pipeline of refrigeration host computer (4) and plate type heat exchanger (3) and connect and then be connected with the entrance pipe of air conditioning terminal (5); The entrance pipe of the entrance pipe of chilled water pump (9) and cooling pump (8) also connects the back and is connected with the export pipeline of air conditioning terminal (5); Cold-storage is with the export pipeline of the export pipeline of refrigeration host computer (1) and cold-storage tank (2) and connect the back and be connected with the inlet of releasing cold pump (7); The entrance pipe of the entrance pipe of cold-storage pump (6) and cold-storage tank (2) also connects the back and exports with second of plate type heat exchanger (3) and be connected, and on the export pipeline of said cold-storage with refrigeration host computer (1) motor-driven valve F2 is installed, and on the export pipeline of cold-storage tank (2) motor-driven valve F1 is installed; On second entrance pipe of plate type heat exchanger (3) electric control valve V3 is installed; Motor-driven valve F4 and leaving water temperature sensor T1 are installed on first export pipeline of plate type heat exchanger (3), and the entrance pipe of chilled water pump (9) is equipped with mixing water temperature sensor T2
The entrance pipe of said chilled water pump (9) is provided with bypass pipe (10) and is connected with first outlet that plate type heat exchanger (3) is provided with, and on bypass pipe (10), is provided with motor-driven valve F5.
2. indirect cooling formula water chilling air conditioning system according to claim 1; It is characterized in that: the said setting that utilizes bypass pipe (10) through mesolimnion; By cold-storage tank (2), release the cold-storage tank that cold pump (7), plate type heat exchanger (3), motor-driven valve F1, electric control valve V3 connect into and release cold loop; When closing motor-driven valve F4, the interior cold of cold-storage tank (2) is given the backwater of air conditioning terminal (5) higher temperature through plate type heat exchanger (3) indirect transfer
Chilled water in the said cold-storage tank (2) is given the backwater of air conditioning terminal (5) higher temperature through plate type heat exchanger (3) indirect transfer; Its mixing temperature T2 is lower than the return water temperature of air conditioning terminal (5); Mixed water gets into cold-storage with refrigeration host computer (1); Cold-storage is with refrigeration host computer (1) unloading, and wherein plate type heat exchanger (3), motor-driven valve F1, direct cooling connect into plate type heat exchanger system loop with refrigeration host computer (4), chilled water pump (9), cooling pump (8).
3. claim 1 or 2 described indirect cooling formula water chilling air conditioning system operation methods is characterized in that:
1) cold-storage is used the refrigeration host computer operating condition: motor-driven valve F1, motor-driven valve F2 open, and cold-storage is with refrigeration host computer (1), cold-storage pump (6) operation, and when cold-storage tank cold-storage temperature reached, cold-storage finished;
2) cold-storage groove cooling operating condition: motor-driven valve F1 opens, and releases cold pump (7) and opens, and electric control valve V3 regulates according to plate type heat exchanger (3) secondary side cooling design temperature T1; To keep constant cooling temperature, cooling pump (8) always supplies the pressure reduction of return pipe to carry out variable frequency adjustment according to end system cooling loop, to reach energy-conservation effect; When cold-storage tank (2) is released when being chilled to mesolimnion and surpassing cooling temperature T1 aspect; This operating mode stops, and wherein mesolimnion is meant that cold water is positioned at the bottom of cold-storage tank (2) in the cold-storage tank (2); Warm water is positioned at the top of cold-storage tank (2), and mesolimnion is meant the transition zone between cold water and warm water;
3) the interior mesolimnion of cold-storage tank (2) utilizes operating condition: release when being chilled to mesolimnion and can not making cooling temperature T1 reach setting value through plate type heat exchanger (3) when cold-storage tank (2), move this pattern, under this pattern; Cold-storage tank (2) still continues cooling, and motor-driven valve F1 opens, and releases cold pump (7) and opens; With the low-limit frequency operation, increase the tank temperature difference, chilled water pump (9) and direct cooling are opened with refrigeration host computer (4); Open motor-driven valve F5; Close motor-driven valve F4, cooling pump (8) carries out Flow-rate adjustment according to design temperature T2, and this moment, mixing temperature T2 was lower than the return water temperature of air conditioning terminal (5); Mixing water gets into direct cooling and is cooled to cooling temperature with refrigeration host computer (4), makes direct cooling be offloaded to efficient running status with refrigeration host computer (4).
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| CN103234250A (en) * | 2013-05-15 | 2013-08-07 | 新奥科技发展有限公司 | Chilled water storage air conditioning system and operation method thereof |
| CN104180479A (en) * | 2014-08-29 | 2014-12-03 | 深圳华森建筑与工程设计顾问有限公司 | Cold accumulation air-conditioning system and control method thereof |
| CN105444316A (en) * | 2016-01-18 | 2016-03-30 | 深圳市海吉源科技有限公司 | Huge-temperature-difference single tube long distance conveying chilled water storage and cooling system |
| CN107062480A (en) * | 2017-04-18 | 2017-08-18 | 海南佩尔优科技有限公司 | A kind of air-conditioning equipment and its control method |
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| CN103234250B (en) * | 2013-05-15 | 2015-09-16 | 新奥科技发展有限公司 | A kind of water cool-storage technology system and operation method thereof |
| CN103234250A (en) * | 2013-05-15 | 2013-08-07 | 新奥科技发展有限公司 | Chilled water storage air conditioning system and operation method thereof |
| CN104180479A (en) * | 2014-08-29 | 2014-12-03 | 深圳华森建筑与工程设计顾问有限公司 | Cold accumulation air-conditioning system and control method thereof |
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| CN107514723A (en) * | 2017-10-11 | 2017-12-26 | 成都歆雅春风科技有限公司 | A kind of cold automatic regulating system and air-conditioning |
| CN108224643A (en) * | 2018-02-07 | 2018-06-29 | 杨伟国 | By-pass flow thermostat and the water energy-storage system using the thermostat |
| CN109945299A (en) * | 2019-03-20 | 2019-06-28 | 珠海格力电器股份有限公司 | Air-conditioning and its control method |
| CN109945299B (en) * | 2019-03-20 | 2021-02-05 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
| CN110671772A (en) * | 2019-11-06 | 2020-01-10 | 昆山璟赫机电工程有限公司 | Constant temperature and humidity water system |
| CN112178846A (en) * | 2020-09-24 | 2021-01-05 | 北京佩尔优能源科技有限公司 | Air conditioning system and control method thereof |
| CN112229052A (en) * | 2020-11-16 | 2021-01-15 | 广东美的制冷设备有限公司 | Dehumidifier |
| CN112665049A (en) * | 2020-12-28 | 2021-04-16 | 无锡市工业设备安装有限公司 | Novel efficient chilled water storage operation method |
| CN114294737A (en) * | 2021-12-23 | 2022-04-08 | 珠海格力电器股份有限公司 | Refrigeration system, control method and air conditioner |
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