CN111741661A - Power liquid supply reflux type phase change heat transfer system with cold source - Google Patents
Power liquid supply reflux type phase change heat transfer system with cold source Download PDFInfo
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- CN111741661A CN111741661A CN202010655032.0A CN202010655032A CN111741661A CN 111741661 A CN111741661 A CN 111741661A CN 202010655032 A CN202010655032 A CN 202010655032A CN 111741661 A CN111741661 A CN 111741661A
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- 239000007788 liquid Substances 0.000 title claims abstract description 67
- 238000012546 transfer Methods 0.000 title claims abstract description 22
- 230000008859 change Effects 0.000 title claims abstract description 18
- 238000010992 reflux Methods 0.000 title claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims abstract description 77
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 230000005514 two-phase flow Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims 1
- 238000004378 air conditioning Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
- H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20309—Evaporators
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20327—Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20336—Heat pipes, e.g. wicks or capillary pumps
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
A power liquid supply reflux type phase change heat transfer system with a cold source comprises a condenser, a flash tank, a plurality of groups of evaporators, throttle valves A, a circulating pump I, a compressor, a throttle valve B, a gas collecting pipe and a liquid supply pipe, wherein the throttle valves A, the circulating pump I, the compressor, the throttle valves B, the gas collecting pipe and the liquid supply pipe are in one-to-one correspondence with the evaporators; the liquid refrigerant outlet of the flash tank is communicated with a liquid supply pipe; the first circulating pump is arranged on the liquid supply pipe; a refrigerant liquid supply port of each evaporator is communicated with outlets of the throttling valves A which correspond to the evaporators one by one through a pipeline, and inlets of the throttling valves A are communicated with the liquid supply pipe through pipelines; the refrigerant outlet port of each evaporator is communicated with the gas collecting pipe through a pipeline; the refrigerant inlet end of the compressor is communicated with the gas collecting pipe, and the refrigerant inlet end of the compressor is also communicated with the outlet of the gaseous refrigerant of the flash tank; a refrigerant outlet end of the compressor communicates with a refrigerant inlet of the condenser.
Description
Technical Field
The application relates to the technical field of data center refrigeration, in particular to a power liquid supply backflow type phase change heat transfer system with a cold source.
Background
Along with the development of a data center, the heat is larger, the existing machine room air conditioning system adopts a heat management mode for controlling the overall temperature of a machine room, the heat exchange temperature difference is relatively small, and the heat exchange efficiency is low.
The heat dissipation methods adopted in the existing information machine room mainly include the following methods:
one is the accurate air supply of precision air conditioner, and the server rack has directly been introduced to the cold wind that this mode computer lab indoor adoption wind channel will precision air conditioner, and main advantage has realized that cold wind directly introduces the server rack, makes under the rack server air inlet is in more ideal low temperature state, and the shortcoming is that the fan need choose for use the big pressure head fan that can overcome the wind channel resistance, and consequently the fan consumption is great, has brought the precision air conditioner consumption great thereupon.
The other is a row-to-row air conditioner, which directly sends cold air of an air conditioning system to a cabinet needing cooling through a specific air duct, increases the cold air sending temperature difference, and can properly improve the air supply temperature of air conditioning cooling so as to improve the overall performance of the air conditioning system. The main disadvantage of this method is that the blower of the air conditioning system is required to provide a large pressure head, which increases the transport energy consumption of the air supply, and in addition, the air distribution in the air duct is also not easily adjustable.
Thirdly, the back plate air conditioner arranges the evaporator of the air conditioning system at the air outlet of the cabinet, thus effectively reducing the cold energy dissipation of the air conditioning system and supplying cold as required; however, introducing water into the machine room presents a safety hazard.
In addition to the three heat removal modes, the gravity-driven heat pipe heat removal product is more and more widely applied in the field of machine room heat removal due to the advantages of high efficiency, energy conservation, safety, reliability and the like. However, when the gravity heat pipe is used, the high-power heat dissipation cannot be safely and stably achieved, so that the refrigeration cooling system which can utilize an outdoor natural cold source, can improve the overall performance and reliability of a unit and can ensure the normal and stable operation of a data center or communication machine room equipment all the year round is designed, and the problem to be solved in the field is urgently solved.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, and provides a power liquid supply reflux type phase change heat transfer system with a cold source, which can realize high-power heat exchange of a single unit by completely utilizing the combination of a natural cold source and mechanical refrigeration, realize accurate liquid supply of each evaporator through a throttle valve, and solve the problems of limited heat transfer distance and installation position through the design of a first circulating pump; the problem that the gas collecting pipe is full of liquid refrigerant and cannot normally operate due to the fact that the gas collecting pipe is opened after the high-power phase-change heat transfer system is shut down in operation is solved through the design of the circulating pump II.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a power liquid supply reflux type phase change heat transfer system with a cold source comprises a condenser, a flash tank, a plurality of groups of evaporators, throttle valves A, a circulating pump I, a compressor, a throttle valve B, a gas collecting pipe and a liquid supply pipe, wherein the throttle valves A, the circulating pump I, the compressor, the throttle valves B, the gas collecting pipe and the liquid supply pipe are in one-to-one correspondence with the evaporators; the liquid refrigerant outlet of the flash tank is communicated with a liquid supply pipe; the first circulating pump is arranged on the liquid supply pipe; a refrigerant liquid supply port of each evaporator is communicated with outlets of the throttling valves A which correspond to the evaporators one by one through a pipeline, and inlets of the throttling valves A are communicated with the liquid supply pipe through pipelines; the refrigerant outlet port of each evaporator is communicated with the gas collecting pipe through a pipeline; the refrigerant inlet end of the compressor is communicated with the gas collecting pipe, and the refrigerant inlet end of the compressor is also communicated with the outlet of the gaseous refrigerant of the flash tank; a refrigerant outlet end of the compressor is communicated with a refrigerant inlet of the condenser; one end of the throttle valve B is communicated with a refrigerant outlet of the condenser, and the other end of the throttle valve B is communicated with an inlet of the flash tank.
Furthermore, the device also comprises a circulating pump II, a one-way valve I and a one-way valve II; a refrigerant inlet of the second circulating pump is communicated with the gas collecting pipe through a pipeline, a refrigerant outlet of the second circulating pump is communicated with a refrigerant inlet of the first one-way valve through a pipeline, and a refrigerant outlet of the first one-way valve is communicated with the liquid supply pipe through a pipeline; the two check valves are connected in parallel at two ends of the first circulating pump in the direction that a refrigerant outlet of the first circulating pump points to a refrigerant inlet of the first circulating pump.
Further, a third check valve is included and is installed between the outlet of the gaseous refrigerant of the flash tank and the compressor.
Further, the first circulating pump and the second circulating pump are fluorine pumps or two-phase flow pumps.
Compared with the prior art, the invention has the following advantages:
the power liquid supply reflux type phase change heat transfer system with the cold source realizes the operation of the optimal liquid filling rate of the refrigerant in each evaporator through the design of the throttle valve A, reduces the energy consumption, improves the efficiency and obtains good energy-saving effect; the heat pipe end system can adopt an N +1 mode, so that the backup of the end system is realized, and the system is more stable in operation; through the design of the first circulating pump, the problems of limitation of heat transfer distance and installation position are solved; in addition, the whole system works more stably due to the design of the second circulating pump, and the problem that the system cannot transfer heat due to phase change because the gas collecting pipe is filled with liquid refrigerant when the system is suddenly stopped and restarted is solved; the whole system is safe and reliable; the system backup selection is flexible, and the method is suitable for data rooms with different redundancy backup requirements.
Drawings
FIG. 1 is a schematic structural diagram of a power liquid supply reflux type phase change heat transfer system with a cold source.
FIG. 2 is a schematic diagram of a second cycle structure of the power liquid supply reflux type phase change heat transfer system with a cold source according to the present invention.
In the figure: 1. a condenser; 2. a flash tank; 3. an evaporator; 4. A throttle valve A; 5. a second circulating pump; 61. a one-way valve I; 62. a second one-way valve; 63. a one-way valve III; 7. a liquid supply tube; 8. A gas collecting pipe; 9. a compressor; 10. a throttle valve B; 11. and a first circulating pump.
Detailed Description
The present invention is further illustrated by the following examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing examples or some of the technical features can be replaced. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Referring to fig. 1, the power liquid supply reflux type phase change heat transfer system with a cold source of the present invention includes a condenser 1, a flash tank 2, a plurality of sets of evaporators 3, throttle valves a4 corresponding to the evaporators one by one, a first circulation pump 11, a compressor 9, a throttle valve B10, a liquid supply pipe 7 and a gas collection pipe 8; the liquid refrigerant outlet of the flash tank 2 is communicated with a liquid supply pipe 7; the first circulating pump 11 is arranged on the liquid supply pipe 7; the refrigerant liquid supply port of each evaporator 3 is communicated with the outlet of the throttling valve A4 corresponding to the evaporator one by one through a pipeline, and the inlet of the throttling valve A4 is communicated with the liquid supply pipe 7 through a pipeline; the refrigerant outlet port of each evaporator 3 is communicated with the gas collecting pipe 8 through a pipeline; the refrigerant inlet end of the compressor 9 is communicated with the gas collecting pipe 7, and the refrigerant inlet end of the compressor 9 is also communicated with the gaseous refrigerant outlet of the flash tank 2; a refrigerant outlet end of the compressor 8 is communicated with a refrigerant inlet of the condenser 1; the refrigerant inlet of the throttle valve B10 is in communication with the refrigerant outlet of the condenser 1 and the refrigerant outlet of the throttle valve 10B is in communication with the inlet of the flash tank 2.
Further, a check valve three 63 is included, the check valve three 63 being installed between the outlet of the gaseous refrigerant of the flash tank 2 and the compressor 9.
The throttle valve a4 is an electronic throttle valve, and it detects the temperature of the corresponding evaporator 3 to accurately supply liquid, so that the evaporator 3 is in the optimum working state.
The working principle and the working process of the power liquid supply reflux type phase change heat transfer system with the cold source are as follows:
when the evaporator is in normal work and heat exchange, the first circulating pump 11 is started, the first circulating pump 11 pumps liquid cold refrigerant from the flash tank 2 to flow into each evaporator 3 through the liquid supply pipe 7 and the throttle valve A4, and the throttle valve A4 adjusts the amount of the refrigerant in the evaporator 3 by detecting the temperature of the corresponding evaporator 3, so that the evaporator 3 is in an optimal working state; the evaporator 3 exchanges heat with an indoor high-temperature environment, the refrigerant in the evaporator 3 is gasified, then gaseous refrigerant or gas-liquid mixed refrigerant enters the compressor 9 through the gas collecting pipe 8, meanwhile, the gaseous refrigerant in the flash tank 2 also enters the compressor 9 through the one-way valve III 63, the high-temperature high-pressure refrigerant discharged from the compressor 9 enters the condenser 1 to exchange heat with the external environment, the gaseous refrigerant after heat release is condensed into liquid refrigerant or gas-liquid mixed state, and the refrigerant cooled in the condenser 1 enters the flash tank 2 through the throttle valve B10 to be subjected to gas-liquid separation; then, the gaseous refrigerant in the flash tank 2 enters the compressor 9 through the three-way valve 63, and the liquid refrigerant in the flash tank 2 flows into each evaporator 3 through the liquid supply pipe 7 and each throttle valve a4 under the action of the first circulating pump 11, so that the reciprocating circulation is performed, the heat exchange is completed, and the heat dissipation of the heat source is realized.
Referring to fig. 2, the power liquid supply reflux type phase change heat transfer system with a cold source of the present invention further includes a second circulation pump 5, a first check valve 61 and a second check valve 62 on the basis of fig. 1; a refrigerant inlet of the second circulating pump 5 is communicated with the gas collecting pipe 8 through a pipeline, a refrigerant outlet of the second circulating pump 5 is communicated with a refrigerant inlet of the first check valve 61 through a pipeline, and a refrigerant outlet of the first check valve 61 is communicated with the liquid supply pipe 7 through a pipeline; the second check valve 62 is connected in parallel to two ends of the first circulation pump 11, and the refrigerant outlet of the first circulation pump 11 points to the refrigerant inlet of the first circulation pump 11.
The second circulating pump 5 is a fluorine pump or a two-phase flow pump, when the power liquid supply reflux type phase change heat transfer system with a cold source runs or is just started, a large amount of liquid refrigerant exists in a liquid collecting pipe 8 of the whole system, and when the whole system cannot work normally, the second circulating pump 5 is started to pump the liquid refrigerant or the gas-liquid mixed refrigerant stored in the gas collecting pipe 8 back to the flash tank 2 through a first check valve 61, a liquid supply pipe 7 and a second check valve 62; and stopping the circulating pump II 5 until the liquid refrigerant in the gas collecting pipe 8 is pumped out, and recovering the normal working mode of the figure 1 by the power liquid supply reflux type phase change heat transfer system with the cold source at the moment.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (4)
1. The utility model provides a power confession liquid backward flow formula phase transition heat transfer system from taking cold source which characterized in that: the system comprises a condenser, a flash tank, a plurality of groups of evaporators, throttle valves A corresponding to the evaporators one by one, a circulating pump I, a compressor, a throttle valve B, a gas collecting pipe and a liquid supply pipe; the liquid refrigerant outlet of the flash tank is communicated with a liquid supply pipe; the first circulating pump is arranged on the liquid supply pipe; a refrigerant liquid supply port of each evaporator is communicated with outlets of the throttling valves A which correspond to the evaporators one by one through a pipeline, and inlets of the throttling valves A are communicated with the liquid supply pipe through pipelines; the refrigerant outlet port of each evaporator is communicated with the gas collecting pipe through a pipeline; the refrigerant inlet end of the compressor is communicated with the gas collecting pipe, and the refrigerant inlet end of the compressor is also communicated with the outlet of the gaseous refrigerant of the flash tank; a refrigerant outlet end of the compressor is communicated with a refrigerant inlet of the condenser; one end of the throttle valve B is communicated with a refrigerant outlet of the condenser, and the other end of the throttle valve B is communicated with an inlet of the flash tank.
2. The dynamic liquid supply reflux phase change heat transfer system with the cold source as claimed in claim 1, wherein: the device further comprises a circulating pump II, a one-way valve I and a one-way valve II; a refrigerant inlet of the second circulating pump is communicated with the gas collecting pipe through a pipeline, a refrigerant outlet of the second circulating pump is communicated with a refrigerant inlet of the first one-way valve through a pipeline, and a refrigerant outlet of the first one-way valve is communicated with the liquid supply pipe through a pipeline; the two check valves are connected in parallel at two ends of the first circulating pump in the direction that a refrigerant outlet of the first circulating pump points to a refrigerant inlet of the first circulating pump.
3. The dynamic liquid supply reflux phase change heat transfer system with the cold source as claimed in claim 1, wherein: and the third check valve is arranged between the outlet of the gaseous refrigerant of the flash tank and the compressor.
4. The dynamic liquid supply reflux phase change heat transfer system with the cold source as claimed in claim 1, wherein: the first circulating pump and the second circulating pump are fluorine pumps or two-phase flow pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655032.0A CN111741661A (en) | 2020-07-09 | 2020-07-09 | Power liquid supply reflux type phase change heat transfer system with cold source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655032.0A CN111741661A (en) | 2020-07-09 | 2020-07-09 | Power liquid supply reflux type phase change heat transfer system with cold source |
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| Publication Number | Publication Date |
|---|---|
| CN111741661A true CN111741661A (en) | 2020-10-02 |
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| CN202010655032.0A Pending CN111741661A (en) | 2020-07-09 | 2020-07-09 | Power liquid supply reflux type phase change heat transfer system with cold source |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201237304Y (en) * | 2008-07-05 | 2009-05-13 | 林志辉 | Heat pump type air-conditioning and water-heating dual-purpose apparatus |
| CN105910315A (en) * | 2016-06-14 | 2016-08-31 | 安徽省君杰新能源科技有限公司 | Combined air conditioning system for machine room and control method thereof |
| WO2018000601A1 (en) * | 2016-06-29 | 2018-01-04 | 北京丰联奥睿科技有限公司 | Multi-branch heat pipe/heat pump composite system |
| CN110094818A (en) * | 2019-06-10 | 2019-08-06 | 克莱门特捷联制冷设备(上海)有限公司 | A kind of data center's compound air-conditioning system and its control method |
| CN212573359U (en) * | 2020-07-09 | 2021-02-19 | 北京中热信息科技有限公司 | Power liquid supply reflux type phase change heat transfer system with cold source |
-
2020
- 2020-07-09 CN CN202010655032.0A patent/CN111741661A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201237304Y (en) * | 2008-07-05 | 2009-05-13 | 林志辉 | Heat pump type air-conditioning and water-heating dual-purpose apparatus |
| CN105910315A (en) * | 2016-06-14 | 2016-08-31 | 安徽省君杰新能源科技有限公司 | Combined air conditioning system for machine room and control method thereof |
| WO2018000601A1 (en) * | 2016-06-29 | 2018-01-04 | 北京丰联奥睿科技有限公司 | Multi-branch heat pipe/heat pump composite system |
| CN110094818A (en) * | 2019-06-10 | 2019-08-06 | 克莱门特捷联制冷设备(上海)有限公司 | A kind of data center's compound air-conditioning system and its control method |
| CN212573359U (en) * | 2020-07-09 | 2021-02-19 | 北京中热信息科技有限公司 | Power liquid supply reflux type phase change heat transfer system with cold source |
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