A phase-change heat storage capsule and a phase-change heat storage device with heat pipe-assisted enhanced heat transfer

Abstract

The invention discloses a phase change heat storage capsule assisting heat transfer enhancement with heat pipes and a phase change heat storage device. The phase change heat storage capsule assistingheat transfer enhancement with the heat pipe comprises a casing; a heat pipe pair with two ends extending to the outside of the casing, wherein the heat pipe pair comprises two heat pipes butted together by a joint located in the casing, each heat pipe comprises a first heat exchange section disposed outside the casing, a second heat exchange section disposed in the casing and a heat insulating section connecting the first heat exchange section and the second heat exchange section, one part of the heat insulating section is disposed outside the casing, and the other part is disposed in the casing; a phase change heat storage material filled in the casing and outside the heat pipe pair. The phase change heat storage device is also provided. The phase change heat storage capsule adopts heatpipes to assist the heat transfer enhancement, the heat storage and release speed of the phase change heat storage capsule and the phase change heat storage device is effectively improved, the heat storage and release effect is improved, and the capsule and the device have the advantages of being simple and compact in structure and convenient to manufacture.

Description

technical field [0001] The invention relates to the technical field of heat storage. More specifically, it relates to a phase-change heat storage capsule and a phase-change heat storage device in which heat pipes are assisted to enhance heat exchange. Background technique [0002] Heat storage technology is an important technology for thermal energy utilization. With the continuous development of technologies such as solar thermal utilization, solar thermal power generation, and waste heat recovery, heat storage technology, as a technology that can effectively improve the energy dispatchability of intermittent heat sources, has received increasing attention from academia and industry. Heat storage technologies are mainly divided into three categories: sensible heat storage, phase change (latent heat) heat storage, and chemical energy heat storage. Phase change heat storage has the characteristics of large heat storage capacity and relatively stable heat storage and release...

AI Technical Summary

Problems solved by technology

However, one of the main shortcomings of the current phase change heat storage is that the heat storage and heat release process takes a long time, and the heat storage and release rate is slow, which seriously affects the timely storage and release of heat energy.

[0005] At present, the packaging method of heat storage capsules is mainly spherical, but the combination of spherical capsules and heat pipes will increase the distance between capsules, reduce the filling rate of phase change capsules in the heat storage tank, and the stacking of capsules will easily cause damage to the heat storage unit

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