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Heat regenerator based on phase change materials and stirling cycle system

A technology of phase change materials and regenerators, which is applied in the field of Stirling cycle systems, can solve the problems of less application and no filling of regenerators, and achieve the goal of increasing heat storage, reducing thermal fatigue damage, and reducing volume Effect

Pending Publication Date: 2019-09-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application field of phase change capsule involves many fields such as aerospace, construction, automobile, environmental protection, textile and clothing, medical and health, but it is rarely used in the field of Stirling machine and electronic device cooling. Prior literature on regenerator packing

Method used

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  • Heat regenerator based on phase change materials and stirling cycle system
  • Heat regenerator based on phase change materials and stirling cycle system
  • Heat regenerator based on phase change materials and stirling cycle system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as figure 2 As shown, the phase change capsule 1 includes two parts: a capsule core 2 and a capsule wall 3 . The capsule core 2 is made of phase-change material, and the phase-change process occurs within the working temperature range of the regenerator, that is, the temperature of the high-temperature airflow is higher than the melting point of the phase-change material of the capsule core, and the temperature of the low-temperature airflow is lower than the melting point of the phase-change material of the capsule core, which is used for storage and release heat. The capsule wall 3 is used to separate the capsule core from the air flow, protect the capsule core, and transfer heat. Those skilled in the art can understand that the filler used in the regenerator for latent heat exchange in the present invention mainly utilizes the latent heat performance of the phase change material. That is to say, the structure of the phase-change material used as filler is not...

Embodiment 2

[0053] Such as image 3As shown, the regenerator shell 4 is in the shape of a flat cuboid, the height of which is equal to the outer diameter of the phase-change capsule, and a layer of phase-change capsule 1 is fixed. The phase-change capsule 1 is generally a large capsule with a particle diameter greater than 1 mm, which is convenient for fixing. The regenerator shell 4 is an air flow channel. The high-temperature air first enters the regenerator from the side of the regenerator shell and flows through the phase change capsule 1. The temperature of the capsule wall 3 rises. Because the melting point of the capsule wall material is much higher than the high temperature The airflow remains solid, and because the thermal conductivity of the wall material is high, the heat flow temperature of the high-temperature airflow can be well transmitted to the capsule core 2. Generally, the melting point of the core material is relatively low and lower than the temperature of the high-tem...

Embodiment 3

[0055] Such as Figure 4 As shown, the shape of the regenerator shell is cylindrical, square, honeycomb or circular, that is, the cross-sectional shape of the chamber formed by the regenerator shell is circular, square, honeycomb or circular. The phase-change capsule 1 is placed in the cavity formed by the shell 4 of the regenerator, and its fixing method is changed from the direct fixation of the original regenerator shell 4 to the multi-layer wire mesh 5, and each two layers of wire mesh clamp a Layer phase change capsule 1, the phase change capsule is generally a large capsule with a particle diameter greater than 1mm. The air flow enters the cavity formed by the regenerator shell 4 through the wire mesh 5 , exchanges heat with the phase change capsule 1 , and then flows out through the wire mesh on the other side. Specifically, cylindrical, square, and honeycomb shells are mainly used in α-type Stirling engines. However, in β-type and γ-type Stirling engines, an annular ...

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Abstract

The invention discloses a heat regenerator based on phase change materials. The heat regenerator comprises a shell and a packing portion filling in a chamber formed by the shell, one end of the chamber is a hot end for allowing a high-temperature gas working medium to flow therein, the other end of the chamber is a cold end for allowing a low-temperature gas working medium to flow therein, the high-temperature gas working medium and the low-temperature gas working medium alternately flow through the chamber of the heat regenerator through the hot end and the cold end of the chamber correspondingly, wherein the packing portion comprises a plurality of phase change components composed of the phase change materials with different melting points, and the phase change components at least comprise the first melting point phase change component and the second melting point phase change component, and the first melting point phase change component close to the hot end has a higher melting point relative to the second melting point phase change component close to the cold end. According to the provided heat regenerator using the phase change materials as the packing, the heat storage density of the heat regenerator can be improved, the heat regeneration amount can be increased, the size of the heat regenerator also can be reduced, the dead volume of a system can be reduced, and then the efficiency of the whole machine can be improved.

Description

technical field [0001] The present invention relates to a regenerator based on a phase change material, and also relates to a Stirling cycle system using the regenerator. Background technique [0002] Regenerators are the core heat transfer components of Stirling engines, refrigerators, electronic equipment coolers and many other equipment. These devices use gas as the working fluid and work in a closed heat recovery cycle. When the working fluid absorbs heat and expands, the high-temperature airflow flows from the hot end to the cold end, and the regenerator stores a part of the gas heat in the packing; when the working fluid releases heat and compresses, the low-temperature airflow returns from the cold end to the hot end, and the regenerator will store The heat is released to the low-temperature airflow to complete the heat recovery. The regenerator is an energy-saving device that can improve the efficiency of the whole equipment, greatly reducing the workload of the he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02G1/057F02G1/043
CPCF02G1/057F02G1/043
Inventor 肖刚赖华盛倪明江骆仲泱岑可法陈欣程乐鸣方梦祥高翔
Owner ZHEJIANG UNIV
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