CN112414186A - Cooling heat exchange system - Google Patents
Cooling heat exchange system Download PDFInfo
- Publication number
- CN112414186A CN112414186A CN201910785757.9A CN201910785757A CN112414186A CN 112414186 A CN112414186 A CN 112414186A CN 201910785757 A CN201910785757 A CN 201910785757A CN 112414186 A CN112414186 A CN 112414186A
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- China
- Prior art keywords
- phase change
- change medium
- heat exchange
- heat
- liquid
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0266—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
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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
- H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
- H05K7/20663—Liquid coolant with phase change, e.g. heat pipes
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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
Abstract
The invention discloses a cooling heat exchange system, comprising: the system comprises a circulating system, a first phase change medium and a cooling device. The circulating system is provided with a refrigerating end and a heat exchange end, and the refrigerating end is communicated with the heat exchange end; the first phase change medium is arranged in the circulating system and circularly moves between the refrigerating end and the heat exchange end so as to change the temperature of the heat exchange end through the change of the phase state of the first phase change medium; the cooling device is adapted to exchange heat with the first phase change medium at the refrigeration end to change the phase state of the first phase change medium; and the heat exchange end exchanges heat with the to-be-heated piece through a second phase change medium. The cooling heat exchange system has better heat exchange effect and saves more energy.
Description
Technical Field
The invention relates to the technical field of refrigeration systems, in particular to a cooling heat exchange system.
Background
Because the heat exchange media in the refrigeration cycle system in the traditional cooling heat exchange system are non-phase change media such as water, the adopted heat exchange mode is sensible heat exchange, the heat exchange coefficient is small, the heat exchange effect is poor, more consumed driving energy sources exist, and the improvement space exists.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the invention provides a cooling heat exchange system which has a better heat exchange effect and saves more energy.
The cooling and heat exchanging system comprises: the circulating system is provided with a refrigerating end and a heat exchange end, and the refrigerating end is communicated with the heat exchange end; the first phase-change medium is arranged in the circulating system and circularly moves between the refrigerating end and the heat exchange end so as to change the temperature of the heat exchange end through the change of the phase state of the first phase-change medium; a cooling device adapted to exchange heat with the first phase change medium at the refrigeration end to change the phase state of the first phase change medium; and the heat exchange end exchanges heat with the to-be-heated piece through a second phase change medium.
According to the cooling heat exchange system provided by the embodiment of the invention, the heat exchange effect of the cooling heat exchange system is better and the energy is more saved.
In addition, the cooling heat exchange system according to the embodiment of the invention may further have the following additional technical features:
according to some embodiments of the invention, the element to be heat-exchanged exchanges with the second phase change medium to convert the second phase change medium in a liquid state into the second phase change medium in a gaseous state.
According to some embodiments of the invention, the first phase change medium is transformed from the first phase change medium in a gaseous state to the first phase change medium in a liquid state at the refrigeration end to lower its temperature, and the first phase change medium in a liquid state flows to the heat exchange end to exchange heat with the second phase change medium in a gaseous state.
According to some embodiments of the invention, the first phase change medium is converted from the first phase change medium in the liquid state back to the first phase change medium in the gaseous state at the heat exchange end to absorb heat of the second phase change medium in the gaseous state to convert the second phase change medium in the gaseous state back to the second phase change medium in the liquid state.
According to some embodiments of the invention, the heat exchanging end comprises: the liquid inlet loop is suitable for exchanging heat between the first phase change medium in the liquid state and the second phase change medium, and the first phase change medium which is converted into the gaseous state after the heat exchange flows back to the refrigerating end through the liquid outlet loop.
According to some embodiments of the invention, the second phase change medium comprises: and the part to be heated is soaked in the fluorination liquid, the part to be heated exchanges heat with the fluorination liquid, and the fluorination liquid exchanges heat with the first phase change medium.
According to some embodiments of the invention, the fluorinated liquid is disposed in a cabinet, the cabinet has a cooling coil at an upper end thereof, the cooling coil has a liquid inlet end and a liquid outlet end, the liquid inlet loop is communicated with the liquid inlet end through a first branch pipe, and the liquid outlet loop is communicated with the liquid outlet end through a second branch pipe.
According to some embodiments of the invention, a plurality of shut-off valves are provided on the liquid inlet loop and the liquid outlet loop, respectively.
According to some embodiments of the invention, the cooling heat exchange system further comprises: a driving device, wherein the driving device is suitable for driving the first phase change medium to circularly move in the circulating system.
According to some embodiments of the invention, the first phase change medium is at least one of a R134a heat exchanger, a R410a heat exchanger, a R407c heat exchanger.
Drawings
FIG. 1 is a schematic structural diagram of a cooling heat exchange system according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a heat exchange cycle system according to an embodiment of the present invention;
FIG. 3 is a partial schematic view of a heat exchange cycle system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a cabinet according to an embodiment of the present invention.
Reference numerals:
the cooling and heat exchanging system 100, the circulating system 1, the refrigerating end 11, the refrigerating pipeline 111, the heat exchanging end 12, the cooling device 2, the driving device 3, the to-be-exchanged part 200, the liquid inlet loop 121, the liquid outlet loop 122, the shutoff valve 123, the first branch pipe 124, the second branch pipe 125, the electronic expansion valve 4, the thermal bulb 5, the second phase change medium 6, the cabinet 7 and the cooling coil 71.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
A cooling heat exchange system 100 according to an embodiment of the present invention is described below with reference to fig. 1-4.
The cooling and heat exchanging system 100 according to an embodiment of the present invention may include: a circulation system 1, a first phase change medium and a cooling device 2. The cooling and heat exchanging system 100 can be used for cooling a data center, and of course, other structures or devices can be cooled, for clarity of description, the cooling and heat exchanging system 100 is used for cooling the data center, but this illustration is not to be construed as a limitation to the scope of the present invention, and it is clearly understood by those skilled in the art that the cooling and heat exchanging system 100 can be applied to cooling other structures or devices within the scope of the present invention.
As shown in fig. 1, the circulation system 1 has a refrigeration end 11 and a heat exchange end 12, and the refrigeration end 11 communicates with the heat exchange end 12. The refrigeration end 11 is suitable for being arranged outside to continuously exchange heat with a heat exchange medium in the circulation system 1 through circulation refrigeration, and the heat exchange end 12 is suitable for being arranged inside to exchange heat with a data center (to-be-heated part 200) so as to reduce the temperature of the data center (to-be-heated part 200).
In other words, the heat of the data center (the to-be-heated element 200) is suitable for being transferred to the heat exchange medium in the circulation system 1 through heat exchange with the heat exchange end 12, and then is finally transferred to the outside through heat exchange at the cooling end 11 by the heat exchange medium, so as to realize circulation refrigeration.
Because the heat exchange medium in the traditional circulating system is non-phase change medium such as water, the adopted heat exchange mode is sensible heat exchange, the heat exchange coefficient is small, and the heat exchange effect is poor.
To solve this problem, the embodiment of the present invention provides the first phase-change medium in the circulation system 1, that is, the heat exchange medium in the circulation system 1 is set as the phase-change medium, wherein the first phase-change medium circulates in the circulation system 1 to exchange heat with the data center (the to-be-heated element 200) through the change of the phase state of the first phase-change medium. Because the heat exchange medium in the circulation system 1 is changed into the phase change medium, therefore, the first phase change medium is latent heat exchange when exchanging heat with the data center (the part 200 to be heat exchanged), so that the heat exchange coefficient is larger, the heat exchange effect is better, and the heat exchange effect on the data center (the part 200 to be heat exchanged) is improved.
The first phase change medium may be a heat exchange medium that is converted between a gas state and a liquid state, and may also be a heat exchange medium that is converted between a solid state and a gas state or a liquid state. As long as phase change heat transfer is satisfied and the heat transfer coefficient is large.
Further, the cooling device 2 is adapted to exchange heat with the first phase change medium at the refrigeration end 11 to change the phase state of the first phase change medium. That is, after the data center (to-be-heated part 200) exchanges heat with the heat exchanging end 12 to transfer heat of the data center (to-be-heated part 200) into the first phase change medium, the first phase change medium moves to the cooling end 11 and exchanges heat with the cooling device 2, so that heat in the circulation system 1 is transferred into the cooling device 2 and finally transferred to the outside, thereby completing the circulation heat exchange and cooling.
Wherein, cooling device 2 can be the cooling tower, adopts the cooling tower can make the heat transfer cooling effect better.
The driving device 3 is adapted to be arranged on the refrigeration line 111 of the circulation system 1 to drive the first phase change medium to circulate in the circulation system 1.
Because the heat transfer medium in traditional circulation system is the non-phase change medium that heat transfer coefficient is less such as water, consequently, for guaranteeing the heat transfer effect, need to be great the flow cross-section setting of refrigeration pipeline 111 to guarantee to have a large amount of heat transfer medium to flow in refrigeration pipeline 111, in order to guarantee the heat transfer effect in the unit interval. The increase of heat exchange media and the increase of the flow cross section of the pipeline inevitably need larger power to drive the heat exchange media to flow, so that a driving device on the traditional circulating system needs to provide huge driving energy for the heat exchange media, and further the energy is excessively used and wasted.
In the embodiment of the present invention, the first phase change medium with a higher heat exchange efficiency is used to replace the conventional heat exchange medium with a lower heat exchange efficiency, so that less first phase change medium can flow in the refrigeration pipeline 111, and the flow cross section of the refrigeration pipeline 111 can be set to be smaller, so that the driving energy required by the driving device 3 is smaller. Therefore, the purpose of saving energy can be achieved.
Moreover, as the flow cross section of the refrigeration pipeline 111 is smaller, the whole volume of the circulation system 1 becomes smaller, so that the circulation system 1 can occupy smaller space and is more convenient to arrange.
The driving device 3 may be a fluorine pump, and most of the first phase-change medium is a substance with certain corrosivity, so that the driving effect can be effectively ensured by driving the first phase-change medium by using the fluorine pump with a good corrosion resistance effect.
Further, the heat exchange end 12 exchanges heat with the data center (the to-be-heated member 200) through the second phase change medium 6. Three times of phase change heat exchange can be realized, the first time of phase change heat exchange is heat exchange between the cooling device 2 and the first phase change medium, the second time of phase change heat exchange is heat exchange between the first phase change medium and the second phase change medium 6, and the third time of phase change heat exchange is heat exchange between the second phase change medium 6 and the data center (the to-be-heated part 200). Because the whole heat exchange circulation is subjected to three times of phase change heat exchange, the heat exchange effect can be further improved.
According to the cooling heat exchange system 100 of the embodiment of the invention, the cooling heat exchange system 100 has a better heat exchange effect and saves more energy.
According to some embodiments of the present invention, the data center (the to-be-heated member 200) exchanges heat with the second phase change medium 6 to convert the liquid second phase change medium 6 into the gaseous second phase change medium 6, and the gaseous second phase change medium 6 takes away heat of the data center (the to-be-heated member 200).
Further, the first phase change medium exchanges heat with the cooling device 2 at the cooling end 11, and is converted into a liquid-cooled first phase change medium from a gaseous first phase change medium to lower the temperature of the first phase change medium, and then the liquid first phase change medium flows to the heat exchange end 12 to exchange heat with the gaseous second phase change medium 6, so as to take away heat in the second phase change medium 6. Namely, the first phase-change medium is a phase-change heat exchange medium which is converted between a liquid state and a gas state.
Still further, the first phase change medium is converted from the liquid first phase change medium back to the gaseous first phase change medium at the heat exchange end 12 to absorb heat of the gaseous second phase change medium 6 at the heat exchange end 12 to convert the gaseous second phase change medium 6 back to the liquid second phase change medium 6.
As shown in fig. 1 and 2, the heat exchange end 12 includes: the liquid inlet loop 121 and the liquid outlet loop 122, the liquid inlet loop 121 is suitable for exchanging heat between the first phase change medium in the liquid state and the second phase change medium in the gaseous state 6, and the first phase change medium converted into the gaseous state after the heat exchange flows back to the refrigerating end 11 through the liquid outlet loop 122 to exchange heat with the cooling device 2 for the next time, so that a circulating heat exchange form is formed.
Further, the second phase change medium 6 includes: the fluorinated liquid is suitable for being arranged in the closed cabinet body 7, the data center (to-be-heated part 200) is suitable for being soaked in the fluorinated liquid, the data center (to-be-heated part 200) is suitable for exchanging heat with the fluorinated liquid to take away heat of the data center (to-be-heated part 200) so as to convert liquid chlorinated liquid into gaseous fluorinated liquid, the gaseous chlorinated liquid can exchange heat with the first liquid phase-change medium to take away heat of the gaseous chlorinated liquid, and the gaseous chlorinated liquid is converted into liquid chlorinated liquid through heat exchange and flows back to the data center (to-be-heated part 200).
In particular, with reference to fig. 4, the upper end of the cabinet 7 has a cooling coil 71, the cooling coil 71 having a liquid inlet end and a liquid outlet end, the liquid inlet loop 121 being adapted to be connected to the liquid inlet end by a first branch pipe 124, and the liquid outlet loop 122 being adapted to be connected to the liquid outlet end by a second branch pipe 125. The first phase change medium with a lower temperature in the liquid inlet loop 121 is suitable for entering the cooling coil 71 through the first branch pipe 124 and the liquid inlet end to exchange heat with the second phase change medium 6 in a gaseous state, and the first phase change medium with a higher temperature obtained after heat exchange flows back into the liquid outlet loop 122 through the liquid outlet end and the second branch pipe 125, and finally exchanges heat with the cooling device 2 at the cooling end 11.
The arrangement of the first branch pipe 124 and the second branch pipe 125 enables a plurality of cabinets 7 to be connected in parallel to the liquid inlet loop 121 and the liquid outlet loop 122, so as to achieve the purpose that the circulation system 1 can exchange heat for a plurality of data centers (to-be-heated parts 200) at the same time.
As shown in fig. 3, the first branch pipe 124 is provided with an electronic expansion valve 4, and the second branch pipe 125 is provided with a bulb 5, wherein the bulb 5 is adapted to communicate with the electronic expansion valve 4. The electronic expansion valve 4 is adapted to throttle the first phase change medium flowing in through the first branch pipe 124, and the thermal bulb 5 is adapted to detect the temperature of the first phase change medium flowing out from the second branch pipe 125, when the temperature is higher, it is proved that the load of the cabinet 7 is larger, at this time, the electronic expansion valve 4 appropriately controls the valve opening degree, so as to adjust the flow rate of the first phase change medium entering the cooling coil 71, and to ensure the stable operation of the heat exchange process.
Referring to fig. 2, the liquid inlet loop 121 and the liquid outlet loop 122 are respectively provided with a plurality of shut-off valves 123. The shut-off valve 123 may close a section of the inlet loop 121 and the outlet loop 122 such that the first phase change medium does not flow through this section. Specifically, the four shut-off valves 123 of the inlet loop 121 and the outlet loop 122 can be closed to prohibit the first phase change medium in the circulation system 1 from flowing through the cabinet 7 between the four shut-off valves 123, and at this time, the data center (the to-be-heated element 200) located therein cannot perform heat exchange. Such as when the cabinet 7 is damaged and needs to be repaired or replaced.
Wherein, the shut-off valve 123 may be a shut-off butterfly valve.
According to some embodiments of the invention, the first phase change medium is at least one of a R134a heat exchanger, a R410a heat exchanger, a R407c heat exchanger. Therefore, the heat exchange coefficient can be higher, and the whole heat exchange effect can be better.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A cooling heat exchange system, comprising:
the circulating system is provided with a refrigerating end and a heat exchange end, and the refrigerating end is communicated with the heat exchange end;
the first phase-change medium is arranged in the circulating system and circularly moves between the refrigerating end and the heat exchange end so as to change the temperature of the heat exchange end through the change of the phase state of the first phase-change medium;
a cooling device adapted to exchange heat with the first phase change medium at the refrigeration end to change the phase state of the first phase change medium;
and the heat exchange end exchanges heat with the to-be-heated piece through a second phase change medium.
2. The cooling heat exchange system according to claim 1, wherein the member to be heat exchanged exchanges heat with the second phase change medium to convert the second phase change medium in a liquid state into the second phase change medium in a gaseous state.
3. The cooling heat exchange system according to claim 2, wherein the first phase change medium is transformed from the gaseous first phase change medium to the liquid-cooled first phase change medium at the refrigeration end to reduce the temperature thereof, and the liquid first phase change medium flows to the heat exchange end to exchange heat with the gaseous second phase change medium.
4. The cooling heat exchange system of claim 3, wherein the first phase change medium is converted from the first phase change medium in a liquid state back to the first phase change medium in a gaseous state at the heat exchange end to absorb heat from the second phase change medium in a gaseous state to convert the second phase change medium in a gaseous state back to the second phase change medium in a liquid state.
5. The cooling heat exchange system of claim 1, wherein the heat exchange end comprises: the liquid inlet loop is suitable for exchanging heat between the first phase change medium in the liquid state and the second phase change medium, and the first phase change medium which is converted into the gaseous state after the heat exchange flows back to the refrigerating end through the liquid outlet loop.
6. The cooling heat exchange system of claim 5, wherein the second phase change medium comprises: and the part to be heated is soaked in the fluorination liquid, the part to be heated exchanges heat with the fluorination liquid, and the fluorination liquid exchanges heat with the first phase change medium.
7. The cooling and heat exchanging system of claim 6, wherein the fluorinated liquid is adapted to be disposed in a cabinet, the cabinet having a cooling coil at an upper end thereof, the cooling coil having a liquid inlet end and a liquid outlet end, the liquid inlet loop being in communication with the liquid inlet end via a first branch pipe, and the liquid outlet loop being in communication with the liquid outlet end via a second branch pipe.
8. The cooling heat exchange system according to claim 5, wherein a plurality of shut-off valves are respectively arranged on the liquid inlet loop and the liquid outlet loop.
9. The cooling heat exchange system of claim 1, further comprising: a driving device, wherein the driving device is suitable for driving the first phase change medium to circularly move in the circulating system.
10. The cooling heat exchange system of claim 1, wherein the first phase change medium is at least one of a R134a heat exchanger, a R410a heat exchanger, and a R407c heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910785757.9A CN112414186A (en) | 2019-08-23 | 2019-08-23 | Cooling heat exchange system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910785757.9A CN112414186A (en) | 2019-08-23 | 2019-08-23 | Cooling heat exchange system |
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| CN112414186A true CN112414186A (en) | 2021-02-26 |
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| CN113738306A (en) * | 2021-09-02 | 2021-12-03 | 谭艳儒 | Underground phase-change temperature adjusting method and device |
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Application publication date: 20210226 |