CN116123902A - Sleeve type multistage pulsating heat pipe - Google Patents
Sleeve type multistage pulsating heat pipe Download PDFInfo
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- CN116123902A CN116123902A CN202211458839.0A CN202211458839A CN116123902A CN 116123902 A CN116123902 A CN 116123902A CN 202211458839 A CN202211458839 A CN 202211458839A CN 116123902 A CN116123902 A CN 116123902A
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- Prior art keywords
- heat pipe
- temperature
- pulsating heat
- working medium
- pulsating
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a sleeve type multistage pulsating heat pipe, which comprises a heat source area, a high-temperature pulsating heat pipe, a low-temperature pulsating heat pipe and a heat sink area. The invention can be applied to the situation of larger temperature difference of cold and heat sources, ensures that each stage of pulsating heat pipe works in a high-performance temperature range, and reduces heat transfer resistance among different stages of pulsating heat pipes by adopting sleeve structure connection among different stages of pulsating heat pipes.
Description
Technical Field
The invention relates to the technical field of electronic equipment thermal management.
Background
The pulsating heat pipe relies on the pressure difference generated by the phase change of the internal working medium to push the working medium in the pipe to flow unidirectionally, and the heat at the heat source is transported to the heat sink in a sensible heat and latent heat mode, so that the pulsating heat pipe has the remarkable advantages of strong heat transfer capability and high reliability, and is widely applied to the fields of heat control of electronic equipment, energy utilization and the like. The single pulsating heat pipe can only work in a narrow temperature range generally due to the limitation of the working principle of the pulsating heat pipe, and the pulsating heat pipe in a wide temperature range has the problems of poor starting characteristic, low heat transfer capability and the like.
The Chinese patent with the publication number of CN107947638A provides a solar thermoelectric generation device based on double-pulsation heat pipes, which comprises a solar heat collector, a phase-change heat storage cavity, a high-temperature section pulsation heat pipe, a low-temperature Duan Maidong heat pipe and thermoelectric generation sheets; the phase-change heat storage cavity is filled with a phase-change heat storage material; the evaporation end of the high-temperature section pulsating heat pipe extends into the phase change heat storage material, and the condensation end of the high-temperature section pulsating heat pipe is embedded into the channel of the high-temperature heat conducting plate; the evaporation end of the low-temperature Duan Maidong heat pipe is embedded into the channel of the low-temperature heat conducting plate, and the condensation end of the low-temperature Duan Maidong heat pipe is placed in the external environment; the thermoelectric generation sheet is arranged between the low-temperature heat conduction plate and the high-temperature heat conduction plate. The double-pulsation heat pipe is adopted, so that the temperature difference on the two sides of the temperature difference power generation piece can be guaranteed to be always higher, the thermal response is fast, and the heat transfer efficiency is high; the phase-change heat storage material is used for storing heat energy absorbed by the solar heat collector, and the problems of uneven temperature distribution, small contact area during heat conduction and the like are avoided while heat is stored. But also has the following drawbacks: the condensing section of the high-temperature pulsating heat pipe and the evaporating section of the low-temperature pulsating heat pipe are embedded with heat conducting plates, and heat transfer is carried out through the heat conducting plates, so that the heat transfer resistance of the pulsating heat pipe is high, and the volume and the weight are large due to the connection mode.
Disclosure of Invention
The invention provides a sleeve type multistage pulsating heat pipe, which can be applied to the situation of large temperature difference between cold and heat sources, ensures that each stage of pulsating heat pipe works in a high-performance temperature range, and reduces heat transfer resistance among different stages of pulsating heat pipes by adopting sleeve structure connection among different stages of pulsating heat pipes.
The invention provides a sleeve type multistage pulsating heat pipe, which comprises a heat source area, a high-temperature pulsating heat pipe, a low-temperature pulsating heat pipe and a heat sink area, and is characterized in that the heat source area is connected with an evaporation section of the high-temperature pulsating heat pipe, a condensation section of the high-temperature pulsating heat pipe is connected with the evaporation section of the low-temperature pulsating heat pipe, and the condensation section of the low-temperature pulsating heat pipe is connected with the heat sink area.
Preferably, the high-temperature pulsating heat pipe in the sleeve type multistage pulsating heat pipe is of a circular pipe structure, high-temperature working medium is filled in the sleeve type multistage pulsating heat pipe, and the inner diameter d of a pipeline is equal to the inner diameter d of the pipeline 1 Satisfy the following requirements
Wherein g is the gravity acceleration rate, sigma is the surface tension of the high-temperature working medium, ρ l Is the liquid density of the high-temperature working medium, ρ v Is the gaseous density of the high-temperature working medium.
Preferably, the wall thickness b of the inner layer of the sleeve structure is 0.2 to 0.6mm.
Preferably, the sleeve structure outer layer of the sleeve type multistage pulsating heat pipe is filled with a low-temperature working medium, and the outer layer has an inner diameter d 2 Satisfy the following requirements
Wherein g is gravity acceleration, sigma ' is high-temperature working medium surface tension, rho ' ' 1 Is the liquid density of the high-temperature working medium, ρ' v Is the gaseous density of the high-temperature working medium.
Compared with the prior art, the invention has the following advantages:
according to the invention, the sleeve structure is introduced into the multistage pulsating heat pipe to be connected with different stages of pulsating heat pipes, the running stability of the pulsating heat pipe is improved by optimizing the size of the sleeve structure, the heat transfer resistance between different stages of pulsating heat pipes is degraded, and the performance of the pulsating heat pipe is integrally improved. Meanwhile, the sleeve structure is adopted to replace a metal heat conduction structure, so that the volume and the weight of the pulsating heat pipe connecting piece at different stages can be reduced, and the miniaturization and the light weight of the pulsating heat pipe are facilitated.
Drawings
Fig. 1 is a schematic view of the device of the present invention.
Fig. 2 is a schematic view of the sleeve structure of the device of the present invention.
FIG. 3 is a schematic view of the structural dimensions of the sleeve of the device of the present invention.
The figure comprises a heat source area 1, a high-temperature pulsating heat pipe 2, a low-temperature pulsating heat pipe 3, a heat sink area 4, a high-temperature pulsating heat pipe shell 11 and a low-temperature pulsating heat pipe shell 21.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
fig. 1 shows a schematic diagram of the device of the present invention, which comprises a heat source area 1, a high-temperature pulsating heat pipe 2, a low-temperature pulsating heat pipe 3 and a heat sink area 4. The heat source area 1 is connected with the evaporation section of the high-temperature pulsating heat pipe 2, the condensation section of the high-temperature pulsating heat pipe 2 is connected with the evaporation section of the low-temperature pulsating heat pipe 3, and the condensation section of the low-temperature pulsating heat pipe 3 is connected with the heat sink area. The heat source area 1 and the cold source area 2 can be heat conducting metals or can be directly contacted with working media needing heat exchange.
Fig. 2 shows a schematic view of the sleeve structure of the device according to the invention. The high-temperature pulsating heat pipe 2 and the low-temperature pulsating heat pipe 3 adopt a multi-loop structure and have independent and mutually-non-communicated cavity structures. The partial condensation section loop of the high-temperature pulsating heat pipe 2 is connected with the partial evaporation section of the low-temperature pulsating heat pipe 3 by adopting a sleeve structure, and the working medium in the high-temperature pulsating heat pipe performs high-efficiency partition wall heat exchange with the working medium in the low-temperature pulsating heat pipe through the shell of the condensation section of the high-temperature pulsating heat pipe. The sleeve structure does not contain bends, and can also contain a plurality of bends. The flow section of the high-temperature pulsating heat pipe along the circulating flow direction of the working medium is kept unchanged, and the low-temperature pulsating heat pipe passes through the shrinking pipe diameter of the shrinking pipe after passing through the sleeve structure, so that the flow section is kept similar to the inside of the sleeve.
Figure 3 shows a schematic view of the dimensions of the sleeve structure of the device according to the invention. At the sleeve structure, the inner diameter of the high-temperature pulsating heat pipe shell 11 is d 1 The wall thickness is b, and the inner diameter of the low-temperature pulsating heat pipe shell 21 is d 2 。
In one embodiment, the heat source region 1 is a cold plate with high power electronics, operating at a temperature in the range of 50 ℃ to 120 ℃; the heat sink area 4 is the high-altitude atmosphere, and the temperature ranges from minus 40 ℃ to 10 ℃; the high-temperature pulsating heat pipe 2 adopts deionized water as a working medium, the low-temperature pulsating heat pipe 3 adopts R134a as a working medium, and the inner diameter of the high-temperature pulsating heat pipe is d 1 Taking 3mm, the wall thickness of the high-temperature pulsating heat pipe shell is b to 0.4mm, and the inner diameter of the low-temperature pulsating heat pipe is d 2 Take 5.6mm.
Claims (4)
1. A sleeve type multistage pulsating heat pipe is characterized in that: the heat source area is connected with an evaporation section of the high-temperature pulsating heat pipe, a condensation section of the high-temperature pulsating heat pipe is connected with the evaporation section of the low-temperature pulsating heat pipe, the condensation section of the low-temperature pulsating heat pipe is connected with the heat sink area, and the evaporation sections among different stages of pulsating heat pipes are connected with the condensation section by adopting a sleeve structure.
2. The telescopic multistage pulsating heat pipe according to claim 1, wherein: the high-temperature pulsating heat pipe is a circular pipeStructure, high temperature working medium is filled in the structure, and the inner diameter d of the pipeline is equal to the inner diameter d of the pipeline 1 Satisfy the following requirements
G is gravity acceleration, sigma is high-temperature working medium surface tension, ρ l Is the liquid density of the high-temperature working medium, ρ v Is the gaseous density of the high-temperature working medium.
3. A telescopic multistage pulsating heat pipe according to claim 1 or 2, characterized in that: the wall thickness b of the inner layer of the sleeve structure is 0.2 to 0.6mm.
4. A sleeve type multistage pulsating heat pipe as claimed in claim 3, wherein the sleeve structure is externally filled with a low temperature working medium, and the external diameter d 2 Satisfy the following requirements the method comprises the following steps:
wherein g is gravity acceleration, sigma ' is high-temperature working medium surface tension, rho ' ' l Is the liquid density of the high-temperature working medium, ρ' v Is the gaseous density of the high-temperature working medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211458839.0A CN116123902A (en) | 2022-11-18 | 2022-11-18 | Sleeve type multistage pulsating heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211458839.0A CN116123902A (en) | 2022-11-18 | 2022-11-18 | Sleeve type multistage pulsating heat pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116123902A true CN116123902A (en) | 2023-05-16 |
Family
ID=86301683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211458839.0A Pending CN116123902A (en) | 2022-11-18 | 2022-11-18 | Sleeve type multistage pulsating heat pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116123902A (en) |
-
2022
- 2022-11-18 CN CN202211458839.0A patent/CN116123902A/en active Pending
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