Pulsating heat pipe heat exchanger with ammonia water as media and stainless steel as materials

A technology of pulsating heat pipes and heat exchangers, applied in indirect heat exchangers, heat exchange equipment, lighting and heating equipment, etc., can solve problems that no one has raised, and achieve rapid startup, avoid chemical reactions, and avoid temperature-sudden startup The effect of features

Inactive Publication Date: 2015-12-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the research on the working medium of pulsating heat pipes, deionized water, ethanol, R134a and other working fluids are used or tiny particles are added to the working fluid. So far, no one has proposed to rely on ammonia water, by changing the mixing ratio of liquid ammonia and deionized water , to improve the heat transfer performance

Method used

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  • Pulsating heat pipe heat exchanger with ammonia water as media and stainless steel as materials
  • Pulsating heat pipe heat exchanger with ammonia water as media and stainless steel as materials
  • Pulsating heat pipe heat exchanger with ammonia water as media and stainless steel as materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 Shown is a schematic structural diagram of an open pulsating heat pipe heat exchanger. The pulsating heat pipe heat exchanger includes 6 circuits of pulsating heat pipes. The pulsating heat pipes are made of stainless steel, and the pulsating heat pipes are filled with ammonia solution as a working medium. The ammonia solution is formed by mixing liquid ammonia and water. The volume concentration of the ammonia solution is 25%-28%, and the filling rate is 55%.

[0026] Measure the start-up characteristics of the above-mentioned pulsating heat pipe heat exchanger with ammonia water as the medium and stainless steel as the material, and compare it with the deionized water, absolute ethanol, and alcohol solution with a concentration of 25%-28% as the medium and stainless steel as the material. The start-up characteristics of the pulsating heat pipe heat exchanger are used for comparison. The specific measurement steps are as follows:

[0027] (1) The el...

Embodiment 2

[0039] Such as figure 2 Shown is a schematic structural diagram of a closed pulsating heat pipe heat exchanger. The pulsating heat pipe heat exchanger described above is similar to Embodiment 1, except that the two pulsating heat pipes at the head and tail are connected to each other to form a closed loop.

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Abstract

The invention provides a pulsating heat pipe heat exchanger. The pulsating heat pipe heat exchanger is characterized in that the pulsating heat pipe heat exchanger comprises a pulsating heat pipe which is made of stainless steel materials; and the pulsating heat pipe is filled with an ammonia water solution which serves as work media. Compared with other media, the pulsating heat pipe heat exchanger with the ammonia water as the media can be fast started; and because stainless steel and ammonia water are compatible, a chemical reaction of ammonia water with copper is avoided, the temperature jump starting characteristic is avoided, and the problem that the pulsating heat pipe heat exchanger cannot be used in some occasions is solved.

Description

technical field [0001] The invention relates to a pulsating heat pipe heat exchanger utilizing the characteristics of ammonia water. Utilize the phase change heat transfer and pulsation effect of the pulsating heat pipe to effectively improve the heat exchange efficiency of the heat exchanger and form a high-efficiency pulsating heat pipe heat exchanger. At the same time, the stainless steel has the characteristics of corrosion resistance and thermal inertia to expand the application range of the pulsating heat pipe to some extreme areas. It is mainly used in ships, automobiles, aerospace, electronics, waste heat recovery, solar energy and geothermal utilization and other occasions. It has the characteristics of high heat exchange efficiency, less pressure loss, not easy to scale, and corrosion resistance. Background technique [0002] In transportation, aerospace and industrial processes, it is necessary to control or enhance the transfer of heat between equipment systems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D15/02F28F21/08F28F23/00
Inventor 杨洪海邹晶马荣军方海洲
Owner DONGHUA UNIV
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