CN102620365A - Direct cooling type water cold storage air-conditioning system and operating method thereof - Google Patents
Direct cooling type water cold storage air-conditioning system and operating method thereof Download PDFInfo
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- CN102620365A CN102620365A CN2012100975125A CN201210097512A CN102620365A CN 102620365 A CN102620365 A CN 102620365A CN 2012100975125 A CN2012100975125 A CN 2012100975125A CN 201210097512 A CN201210097512 A CN 201210097512A CN 102620365 A CN102620365 A CN 102620365A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The invention discloses a direct cooling type water cold storage air-conditioning system, which comprises a refrigerating host, a cold storage water tank, a cold storage pump, a cooling pump, an air-conditioning tail end and a bypass pipe, wherein an inlet of the refrigerating host is connected with an outlet of the cold storage pump; the outlet of the refrigerating host is connected with an electric valve F2 through a pipeline and then divided into two branches by the electric valve F2; one branch is an air-conditioning tail end branch, and the other branch is a cold storage water tank branch; the air-conditioning tail end and the cold storage water tank are respectively connected with an inlet pipeline of the cold storage pump; an electric regulating valve V6 is arranged on the inlet pipeline of the cold storage pump; the air-conditioning tail end branch is connected with the bypass pipe in parallel; and an electric regulating valve V5 is arranged on the bypass pipe. The invention also discloses an operating method for the direct cooling type water cold storage air-conditioning system. By the invention, the return water temperature of a refrigerating unit is reduced, the refrigerating unit is unloaded to operate in the optimum energy efficiency, the aim of improving the efficiency of a water chilling unit is fulfilled, the efficiency of the system can be integrally improved, the cold storage amount of a water cold storage device is completely utilized, and the operating cost is reduced to the greatest extent.
Description
Technical field
The present invention relates to water chilling air conditioning system technical field, is the technology of a kind of direct cooling formula water chilling air conditioning system and operation method thereof specifically.
Background technology
The water cold accumulation air-conditioner is meant that utilizing valley power that cold is stored in cold-storage groove is in the cold-storage tank, 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.
Direct cool water supply cool-storage system uses comparatively general in the air conditioner water cold accumulation system, and directly the cool water supply cool-storage system is just like Chinese patent 200710028741, and as shown in Figure 1, heavy line partly is an operating loop.There is following problem in system shown in Figure 1:
When 1) the mesolimnion temperature in the cold-storage tank is higher than design temperature T1, can not utilize again, and cause the mesolimnion that is lower than air conditioning terminal 5 return water temperatures not use up, reduce the utilization rate of cold-storage tank;
2) can't improve 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; Can overall improved system the direct cooling formula water chilling air conditioning system and the operation method thereof of efficient, effectively improve the utilization rate of cold-storage tank, simultaneously; Through to the thermoclinic utilization in the cold-storage tank, improve the efficiency of refrigeration host computer.
The present invention realizes through following technical scheme.
A kind of direct cooling formula water chilling air conditioning system; Comprise refrigeration host computer, cold-storage tank, cold-storage pump, cooling pump and air conditioning terminal; The import of refrigeration host computer is connected with the cold-storage delivery side of pump; It is characterized in that: said direct cooling formula water chilling air conditioning system also comprises a bypass pipe, and the outlet of refrigeration host computer is connected and behind motor-driven valve F2, is divided into two branch roads through pipeline with motor-driven valve F2, branch road be by cooling pump and air conditioning terminal be connected to form the air-conditioning end branch; Another branch road be by motor-driven valve F1 and cold-storage tank be connected to form cold-storage tank branch road; Air conditioning terminal, cold-storage tank all are connected with the inlet ductwork of cold-storage pump, on the inlet ductwork of cold-storage pump, are provided with electric control valve V6
One end of said bypass pipe is connected on the inlet ductwork of the cold-storage pump between said electric control valve V6 and the cold-storage pump; The other end of bypass pipe is connected on the pipeline between said cold-storage tank and the motor-driven valve F1; On bypass pipe, be provided with electric control valve V5; Temperature sensor T2 is installed on the inlet ductwork of cold-storage pump, and temperature sensor T2 is connected with electric control valve V5 signal.
The two ends of said air conditioning terminal branch road are provided with communicating pipe; Temperature sensor T1 and electric control valve V4 are installed on cooling pump intake piping road; Temperature sensor T1 is near the inlet of cooling pump; Wherein the end of communicating pipe is connected on the pipeline of temperature sensor T1 and electric control valve V4, and electric control valve V3 was installed on said communicating pipe, and electric control valve V3, electric control valve V4 all are connected with temperature sensor T1 signal.
A kind of operation method of aforementioned direct cooling formula water chilling air conditioning system; It is characterized in that: through the setting of bypass pipe; The loop structure that connects into by refrigeration host computer, cold-storage tank, cold-storage pump, electric control valve V5, electric control valve V6, motor-driven valve F2; When closing motor-driven valve F1, constitute the cooling loop of connecting of cold-storage tank and refrigeration host computer, institute's cold storage capacity obtains utilization in the non-electricity low ebb phase in the cold-storage tank.
A kind of operation method of aforementioned direct cooling formula water chilling air conditioning system; It is characterized in that: when being released into cold-storage tank temperature and being higher than temperature sensor T1 design temperature T1; Open cold-storage pump and refrigeration host computer this moment, unlatching electric control valve V5, electric control valve V6 regulate, and close motor-driven valve F1; Regulate the water flow of cold-storage tank more jointly through electric control valve V5, electric control valve V6; Make water outlet of cold-storage tank and air conditioning terminal backwater be mixed to the design temperature T2 of temperature sensor T2, this moment, mixing temperature T2 was lower than the return water temperature of air conditioning terminal, and mixing water gets into refrigeration host computer and is cooled to T1; Be delivered to air conditioning terminal through the cooling pump, make refrigeration host computer be offloaded to efficient running status.
A kind of operation method of said direct cooling formula water chilling air conditioning system is characterized in that:
1) refrigeration host computer cold-storage operating condition: motor-driven valve F1, motor-driven valve F2 open, refrigeration host computer, cold-storage pump 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; Electric control valve V3 and electric control valve V4 regulate according to cooling temperature T1, and to keep constant cooling temperature, the cooling pump always supplies the pressure reduction of return pipe to carry out variable frequency adjustment according to the cooling loop; 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 fully: release being chilled to mesolimnion above cooling temperature T1 aspect when the cold-storage tank, move this pattern, open cold-storage pump and refrigeration host computer; Unlatching electric control valve V5, electric control valve V6 regulate; Close motor-driven valve F1, regulate the water flow of cold-storage tank again through electric control valve V5, electric control valve V6 jointly, make water outlet of cold-storage tank and air conditioning terminal backwater be mixed to the design temperature T2 of temperature sensor T2; This moment, mixing temperature T2 was lower than the return water temperature of air conditioning terminal; Mixing water gets into refrigeration host computer and is cooled to T1, is delivered to air conditioning terminal through the cooling pump, makes refrigeration host computer be offloaded to efficient running status.
The present invention compared with prior art has the following advantages.
Adopt technical scheme of the present invention; In system, be provided with the bypass pipe that mesolimnion in the cold-storage tank utilizes, make chilled water in the natural layering cold-storage tank mesolimnion scope, at the non-electricity low-valley interval; Mode through direct hybrid air-conditioning end system backwater; Reduce the return water temperature of refrigeration unit, make refrigeration unit be offloaded to best efficiency operation, reach the purpose that improves chiller efficiency; Simultaneously, the electric power low ebb phase institute's cold storage capacity in the cold-storage tank mesolimnion also can be fully used in the non-electricity low ebb phase, had improved the utilization rate of water cold accumulation device.System according to the invention ability overall improved system efficient is utilized water cold accumulation device institute cold storage capacity fully, at utmost reduces operating cost.
Description of drawings
Fig. 1 is the functional-block diagram of the direct cooling formula of prior art water chilling air conditioning system;
The functional-block diagram of the direct cooling formula of Fig. 2 the present invention water chilling air conditioning system;
The operation logic block diagram of the direct cooling formula of Fig. 3 the present invention water chilling air conditioning system.
The specific embodiment
Below in conjunction with accompanying drawing the direct cooling formula of the present invention water chilling air conditioning system is described in further detail.
Like Fig. 2, Fig. 3; The direct cooling formula of the present invention water chilling air conditioning system comprises refrigeration host computer 1, cold-storage tank 2, cold-storage pump 3, cooling pump 4, air conditioning terminal 5 and a bypass pipe 6; The import of refrigeration host computer 1 is connected with the outlet of cold-storage pump 3; The outlet of refrigeration host computer 1 is connected and behind motor-driven valve F2, is divided into two branch roads through pipeline with motor-driven valve F2; Article one, branch road be by cooling pump 4 and air conditioning terminal 5 be connected to form the air-conditioning end branch, another branch road be by motor-driven valve F1 and cold-storage tank 2 be connected to form cold-storage tank branch road, air conditioning terminal 5, cold-storage tank 2 all are connected with the inlet ductwork of cold-storage pump 3; On the inlet ductwork of cold-storage pump 3, be provided with electric control valve V6; One end of bypass pipe 6 is connected on the inlet ductwork of the cold-storage pump 3 between said electric control valve V6 and the cold-storage pump 3, and the other end of bypass pipe 6 is connected on the pipeline between said cold-storage tank 2 and the motor-driven valve F1, on bypass pipe 6, is provided with electric control valve V5; Temperature sensor T2 is installed on the inlet ductwork of cold-storage pump 3, and temperature sensor T2 is connected with electric control valve V5 signal.
Two ends at the air conditioning terminal branch road are provided with communicating pipe; Be also referred to as the profit and loss pipe; Temperature sensor T1 and electric control valve V4 are installed on the entrance pipe of cooling pump 4, and temperature sensor T1 is near the inlet of cooling pump 4, and wherein the end of communicating pipe is connected on the pipeline of temperature sensor T1 and electric control valve V4; Electric control valve V3 was installed on said communicating pipe, and electric control valve V3, electric control valve V4 all are connected with temperature sensor T1 signal.
The operation method of the direct cooling formula of the present invention water chilling air conditioning system: through the setting of bypass pipe 6; The loop structure that connects into by refrigeration host computer 1, cold-storage tank 2, cold-storage pump 3, electric control valve V5, electric control valve V6, motor-driven valve F2; When closing motor-driven valve F1; Constitute the cooling loop of connecting of cold-storage tank 2 and refrigeration host computer 1, institute's cold storage capacities obtained utilizing in the non-electricity low ebb phase in the cold-storage tank 2, with the utilization rate of raising cold-storage tank 2.
As shown in Figure 3, heavy line partly is an operating loop, releases under the cold operation pattern at cold-storage tank 2; When being released into cold-storage tank 2 temperature and being higher than temperature sensor T1 design temperature T1, open cold-storage pump 3 and refrigeration host computer 1 this moment, open electric control valve V5, electric control valve V6 regulates; Close motor-driven valve F1; Regulate the water flow of cold-storage tank 2 again through electric control valve V5, electric control valve V6 jointly, make 2 water outlets of cold-storage tank and air conditioning terminal backwater be mixed to the design temperature T2 of temperature sensor T2, this moment, mixing temperature T2 was lower than the return water temperature of air conditioning terminal 5; Mixing water gets into refrigeration host computer 1 and is cooled to T1; Be delivered to air conditioning terminal 5 through cooling pump 4, make refrigeration host computer 1 be offloaded to efficient running status, improve the Energy Efficiency Ratio of refrigeration host computer 1.Technical scheme according to the invention is innovated on Chinese patent 200710028741 bases, and the present invention has improved the utilization rate of cold-storage tank effectively, simultaneously, through to the thermoclinic utilization in the cold-storage tank, has improved the efficiency of refrigeration host computer.Wherein in the natural layering water cold accumulation groove, cold water is positioned at the bottom of tank, and warm water is positioned at the top of tank, and mesolimnion is meant the transition zone between cold water and warm water.
More describe operation principle below in detail:
1) refrigeration host computer cold-storage operating mode: motor-driven valve F1, motor-driven valve F2 open, refrigeration host computer 1,3 operations of cold-storage pump.When cold-storage tank cold-storage temperature reached, cold-storage finished.
2) cold-storage groove cooling operating mode: motor-driven valve F1 opens, and electric control valve V3 and electric control valve V4 regulate according to cooling temperature T1, to keep constant cooling temperature.Cooling pump 4 always supplies the pressure reduction of return pipe to carry out variable frequency adjustment according to the cooling loop, to reach energy-conservation effect.Release when being chilled to mesolimnion and surpassing cooling temperature T1 aspect when the cold-storage tank, this operating mode stops.
3) mesolimnion utilizes operating condition fully: release being chilled to mesolimnion above cooling temperature T1 aspect when the cold-storage tank, move this pattern.Open cold-storage pump 3 and refrigeration host computer 1; Unlatching electric control valve V5, electric control valve V6 regulate, and close motor-driven valve F1, regulate the water flow of cold-storage tank 2 more jointly through electric control valve V5, electric control valve V6; Make 2 water outlets of cold-storage tank and air conditioning terminal backwater be mixed to the design temperature T2 of temperature sensor T2; This moment, mixing temperature T2 was lower than the return water temperature of air conditioning terminal 5, and mixing water gets into refrigeration host computer 1 and is cooled to T1, is delivered to air conditioning terminal 5 through cooling pump 4; Make refrigeration host computer 1 be offloaded to efficient running status, improve the Energy Efficiency Ratio of refrigeration host computer 1.
Claims (5)
1. direct cooling formula water chilling air conditioning system; Comprise refrigeration host computer (1), cold-storage tank (2), cold-storage pump (3), cooling pump (4) and air conditioning terminal (5); The import of refrigeration host computer (1) is connected with the outlet of cold-storage pump (3); It is characterized in that: said direct cooling formula water chilling air conditioning system also comprises bypass pipe (6), and the outlet of refrigeration host computer (1) is connected and behind motor-driven valve F2, is divided into two branch roads through pipeline with motor-driven valve F2, branch road be by cooling pump (4) and air conditioning terminal (5) be connected to form the air-conditioning end branch; Another branch road be by motor-driven valve F1 and cold-storage tank (2) be connected to form cold-storage tank branch road; Air conditioning terminal (5), cold-storage tank (2) all are connected with the inlet ductwork of cold-storage pump (3), on the inlet ductwork of cold-storage pump (3), are provided with electric control valve V6
One end of said bypass pipe (6) is connected on the inlet ductwork of the cold-storage pump (3) between said electric control valve V6 and the cold-storage pump (3); The other end of bypass pipe (6) is connected on the pipeline between said cold-storage tank (2) and the motor-driven valve F1; On bypass pipe (6), be provided with electric control valve V5; Temperature sensor T2 is installed on the inlet ductwork of cold-storage pump (3), and temperature sensor T2 is connected with electric control valve V5 signal.
2. direct cooling formula water chilling air conditioning system according to claim 1; It is characterized in that: the two ends of said air conditioning terminal branch road are provided with communicating pipe; Temperature sensor T1 and electric control valve V4 are installed on the entrance pipe of cooling pump (4); Temperature sensor T1 is near the inlet of cooling pump (4); Wherein the end of communicating pipe is connected on the pipeline of temperature sensor T1 and electric control valve V4, and electric control valve V3 was installed on said communicating pipe, and electric control valve V3, electric control valve V4 all are connected with temperature sensor T1 signal.
3. the operation method of the described direct cooling formula water chilling air conditioning system of claim 2; It is characterized in that: through the setting of bypass pipe (6); The loop structure that connects into by refrigeration host computer (1), cold-storage tank (2), cold-storage pump (3), electric control valve V5, electric control valve V6, motor-driven valve F2; When closing motor-driven valve F1, constitute the cooling loop of connecting of cold-storage tank (2) and refrigeration host computer (1), the interior institute of cold-storage tank (2) cold storage capacity obtains utilization in the non-electricity low ebb phase.
4. the operation method of the described direct cooling formula water chilling air conditioning system of claim 2; It is characterized in that: when being released into cold-storage tank (2) temperature and being higher than temperature sensor T1 design temperature T1; Open cold-storage pump (3) and refrigeration host computer (1) this moment, unlatching electric control valve V5, electric control valve V6 regulate, and close motor-driven valve F1; Regulate the water flow of cold-storage tank (2) more jointly through electric control valve V5, electric control valve V6; Make (2) water outlet of cold-storage tank and air conditioning terminal backwater be mixed to the design temperature T2 of temperature sensor T2, this moment, mixing temperature T2 was lower than the return water temperature of air conditioning terminal (5), and mixing water gets into refrigeration host computer (1) and is cooled to T1; Be delivered to air conditioning terminal (5) through cooling pump (4), make refrigeration host computer (1) be offloaded to efficient running status.
5. the operation method of the described direct cooling formula water chilling air conditioning system of claim 2 is characterized in that:
1) refrigeration host computer cold-storage operating condition: motor-driven valve F1, motor-driven valve F2 open, refrigeration host computer (1), cold-storage pump (3) 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; Electric control valve V3 and electric control valve V4 regulate according to cooling temperature T1, and to keep constant cooling temperature, cooling pump (4) always supplies the pressure reduction of return pipe to carry out variable frequency adjustment according to the cooling loop; 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) mesolimnion utilizes operating condition fully: release being chilled to mesolimnion above cooling temperature T1 aspect when cold-storage tank (2); Move this pattern; Open cold-storage pump (3) and refrigeration host computer (1), unlatching electric control valve V5, electric control valve V6 regulate, and close motor-driven valve F1; Regulate the water flow of cold-storage tank (2) more jointly through electric control valve V5, electric control valve V6; Make (2) water outlet of cold-storage tank and air conditioning terminal backwater be mixed to the design temperature T2 of temperature sensor T2, this moment, mixing temperature T2 was lower than the return water temperature of air conditioning terminal (5), and mixing water gets into refrigeration host computer (1) and is cooled to T1; Be delivered to air conditioning terminal (5) through cooling pump (4), make refrigeration host computer (1) be offloaded to efficient running status.
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| CN2012100975125A CN102620365A (en) | 2012-04-01 | 2012-04-01 | Direct cooling type water cold storage air-conditioning system and operating method thereof |
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| CN2012100975125A CN102620365A (en) | 2012-04-01 | 2012-04-01 | Direct cooling type water cold storage air-conditioning system and operating method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106958977A (en) * | 2017-04-18 | 2017-07-18 | 海南佩尔优科技有限公司 | A kind of freezer cooling equipment and its control method |
| CN106969449A (en) * | 2017-04-17 | 2017-07-21 | 深圳达实智能股份有限公司 | Mesolimnion cuts down the water energy-storage system and its application method with utilizing |
| CN108413566A (en) * | 2018-04-19 | 2018-08-17 | 浙江大冲能源科技有限公司 | The booting energy-saving control system of air conditioner water cold group when a kind of external world's low humidity ball |
| 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 |
| CN111623450A (en) * | 2020-06-08 | 2020-09-04 | 长江勘测规划设计研究有限责任公司 | Intelligent water mixing structure of air conditioner water cold storage system and control method thereof |
| CN114838423A (en) * | 2022-06-06 | 2022-08-02 | 重庆美的通用制冷设备有限公司 | Air conditioning system |
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| CN111623450A (en) * | 2020-06-08 | 2020-09-04 | 长江勘测规划设计研究有限责任公司 | Intelligent water mixing structure of air conditioner water cold storage system and control method thereof |
| CN111623450B (en) * | 2020-06-08 | 2021-10-15 | 长江勘测规划设计研究有限责任公司 | Intelligent water mixing structure of air conditioner water cold storage system and control method thereof |
| CN114838423A (en) * | 2022-06-06 | 2022-08-02 | 重庆美的通用制冷设备有限公司 | Air conditioning system |
| CN114838423B (en) * | 2022-06-06 | 2023-11-03 | 重庆美的通用制冷设备有限公司 | Air conditioning system |
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