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Integrated preparation technology of loop heat pipe evaporator

A technology of loop heat pipe and preparation process, which is applied in the direction of indirect heat exchangers, lighting and heating equipment, etc., and can solve the problems of evaporating chamber and capillary wick assembly and capillary wick preparation complexity

Inactive Publication Date: 2012-06-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an integrated preparation process of a loop heat pipe evaporator in view of the complicated problems of the current loop heat pipe evaporation chamber and capillary wick assembly and capillary wick preparation

Method used

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  • Integrated preparation technology of loop heat pipe evaporator
  • Integrated preparation technology of loop heat pipe evaporator
  • Integrated preparation technology of loop heat pipe evaporator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] like figure 1 As shown, the loop heat pipe evaporator includes an evaporation chamber 1, a capillary wick 2, a liquid storage chamber 3 is formed in the middle of the capillary wick 2, the liquid storage chamber 3 communicates with the evaporation chamber 5, and there is an There are multiple steam channels 4, and the capillary core 2 is a single-pore capillary core layer.

[0023] The integrated preparation process of the loop heat pipe evaporator, the steps are as follows:

[0024] (1) Select a copper evaporation chamber (with an inner diameter of 2 cm and a length of 5 cm), and add a mixed powder of nickel powder capillary core sintered matrix powder and pore-forming agent to it; before loading the powder, the evaporation chamber is cleaned with dilute sulfuric acid surface;

[0025] (2) Insert a cylindrical graphite liquid storage chamber mold in the middle of the powder, the insertion depth is about 4 / 5 of the height of the evaporation chamber, compact the powder...

Embodiment 2

[0028] like figure 2 As shown, the loop heat pipe evaporator includes an evaporation chamber 1, a capillary wick 2, a liquid storage chamber 3 is formed in the middle of the capillary wick 2, the liquid storage chamber 3 communicates with the evaporation chamber 5, and there is an A plurality of steam channels 4, the capillary core 2 is a composite porous capillary core layer.

[0029] (1) Select a copper evaporation chamber (with an inner diameter of 2 cm and a length of 5 cm). Before loading powder, the inner surface of the evaporation chamber is cleaned with dilute sulfuric acid; Make a cylinder) into the center of the evaporation chamber, fill the first ratio of nickel powder and pore-forming agent mixed powder between the cylinder and the evaporation chamber; then fill the cylinder with the second ratio The mixed powder of nickel powder and pore-forming agent is inserted in the middle of a graphite rod with an inner diameter of 6 mm, and the insertion depth is 4 cm.

...

Embodiment 3

[0033] like figure 1 As shown, the loop heat pipe evaporator includes an evaporation chamber 1, a capillary wick 2, a liquid storage chamber 3 is formed in the middle of the capillary wick 2, the liquid storage chamber 3 communicates with the evaporation chamber 5, and there is an There are multiple steam channels 4, and the capillary core 2 is a single-pore capillary core layer.

[0034] The integrated preparation process of the loop heat pipe evaporator, the steps are as follows:

[0035] (1) Select an aluminum evaporation chamber (with an inner diameter of 2 cm and a length of 5 cm), and add the mixed powder of ceramic powder capillary core sintered matrix powder and pore-forming agent to it; before loading the powder, clean the inside of the evaporation chamber with dilute sulfuric acid surface;

[0036] (2) Insert a cylindrical graphite liquid storage chamber mold in the middle of the powder, the insertion depth is about 4 / 5 of the height of the evaporation chamber, com...

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Abstract

The invention relates to an integrated preparation technology of a loop heat pipe evaporator, which is realized through the following steps: selecting an evaporation cavity, removing an oxidation film on the inner surface of the evaporation cavity; adding mixed powder of porous wick sintered body powder and a pore creating material, inserting a cylindrical liquid storage cavity mold into the mixed powder, determining the insertion depth as per the size of the liquid storage cavity, compacting the mixed powder between the evaporator and the liquid storage cavity mold, putting the evaporation cavity into a sintering furnace for sintering, drilling a plurality of steam passages along the inner wall of the evaporation cavity by means of a bit after sintering and cooling, and taking out the liquid storage cavity mold, so as to obtain an integrated loop heat pipe evaporator. The porous wicks are directly sintered in the evaporation cavity in an enclosed manner, as a result, not only are theporous wicks tightly combined with the wall of the evaporation cavity to avoid problems of heat leakage or steam counterflow, but also the sintered porous wicks can be used directly to avoid problemsof the porous wick breakage brought by secondary machining and the requirement for high accuracy. Lower strength is allowed to realize high porosity factor, thereby facilitating enhancement of the suction force of the porous wicks.

Description

technical field [0001] The invention relates to a loop heat pipe evaporator, in particular to an integrated preparation process for the loop heat pipe evaporator. Background technique [0002] Loop heat pipe (LHP) is a high-efficiency two-phase heat transfer device that relies on the evaporation and condensation of working fluid to achieve the purpose of enhanced heat transfer. It is widely used in the fields of spacecraft thermal control and electronic component heat dissipation. In essence, the heat exchange principle of the loop heat pipe is the same as that of the ordinary heat pipe, and it also relies on phase change heat, which not only achieves the purpose of heat exchange through the alternating cycle of evaporation and condensation of the working fluid, but is different from the traditional heat pipe. The heat pipe generally relies on gravity to reflux the condensed working fluid to achieve the purpose of heat exchange, while the loop heat pipe relies on the capilla...

Claims

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Application Information

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IPC IPC(8): F28D15/04
Inventor 邹勇栾涛徐计元
Owner SHANDONG UNIV
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