Heat transfer enhanced chemical heat storage device and heat storage system applying same

Abstract

A heat transfer enhanced chemical heat storage device in the technical field of heat storage comprises a plurality of heat storage units, a first gas buffer tank and a second gas buffer tank, wherein the first gas buffer tank and the second gas buffer tank are connected with gas inlet ends and outlets of the heat storage units respectively; each heat storage unit comprises an air distribution plate, a stainless-steel wire mesh, a heat storage medium and a bracket; the heat storage medium is wrapped in and fixed by the stainless-steel wire meshes; the stainless-steel wire meshes are fixed in the storage units through the brackets; and the air distribution plates are arranged between the corresponding gas inlet ends and the storage medium. The heat transfer enhanced chemical heat storage device can solve the problems of poor heat transfer performance in a powdery heat storage material and large temperature difference and low heat efficiency between a heat transfer medium and a reaction bed.

Description

technical field [0001] The invention relates to a technology in the heat storage field, in particular to a heat transfer enhanced chemical heat storage device and a heat storage system using the heat storage device. Background technique [0002] Most renewable energy and waste heat resources have periodic fluctuations, and it is difficult to match supply and demand, which limits the development of renewable energy. Heat storage technology is applied to renewable energy and waste heat resources, which can avoid fluctuations in heat sources and maintain a balance between supply and demand. Among many heat storage methods, chemical heat storage has the advantages of high energy storage density and wide operating temperature range. [0003] In chemical heat storage technology, powdered heat storage materials and partition wall heat transfer technology are usually used, but powdered heat storage materials are easy to condense and solidify, resulting in poor heat transfer perform...

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Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a heat transfer-enhanced chemical heat storage device and a heat storage system using the heat storage device. Through direct contact heat transfer, the heat transfer medium is used as the reaction medium to directly contact the solid Reversible reaction in contact with reactants solves the problems of poor internal heat transfer performance of powdered heat storage materials, large temperature difference of heat transfer medium before and after heat storage and exothermic reactions, and low thermal efficiency

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