Solar heat-storing device using gas as heat transfer medium

Abstract

The invention relates to a solar energy heat storage device, in particular to a solar energy heat storage device using gas as heat transfer medium, comprising a housing of a heat storage chamber, thermal insulation material (2), a metal pipeline (4), a holding frame (5), an inlet pipe (6), an outlet pipe (7) and a door of the heat storage chamber (8). The solar energy heat storage device is characterized in that the housing of the heat storage chamber is composed of an outer wall of the heat storage chamber (1) and an inner wall of the heat storage chamber (3); the door (8) and the inner wall (3) of the heat storage chamber form a sealed heat storage space; the inlet pipeline (6) and the outlet pipeline (7), communicated with the heat storage space respectively, are positioned asymmetrically on the housing of the heat storage chamber; at least one layer of the holding frame (5) is positioned in the heat storage space; the holding frame (5) is fixedly connected with the inner wall of the heat storage chamber (3); the metal pipeline (4) is positioned on the holding frame (5); the heat storage material is encapsulated in the metal pipeline (5); the heat transfer medium in the heat storage space is gas. The olar energy heat storage device has the advantages of simple structure, and high efficiency, suitability for using gas as the transfer medium.

Description

technical field [0001] The invention relates to a solar thermal storage device. Background technique [0002] Today, as society's demand and requirements for energy continue to increase, clean solar thermal power generation technology is playing an increasingly important role. In terms of the selection of heat storage materials in solar thermal power generation technology, phase change heat storage has higher efficiency than sensible heat heat storage. The advantage of phase change systems over sensible heat systems lies in their higher heat capacity. There are many patents on heat storage devices using phase change heat storage. For example, GB 2 283 307 discloses a known heat storage device containing a container. The container contains a heat storage medium such as water and such as 1 when in use, 1,1-Trichloroethane as a heat transfer fluid. Chinese patent CN86208443 discloses a heat storage material NaCH 3 COO·3H 2 O is a heat storage device using phase change heat ...

AI Technical Summary

Problems solved by technology

However, since the solar energy varies with the climate, it is difficult to control the parameters of the steam, and the heat loss is large; the molten salt has a relatively high melting point (120°C-140°C), and the pipeline that flows through it must be adjusted when the system is started. warm up

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