Heat accumulation device

Abstract

The invention discloses a heat accumulation device comprising a heat accumulation space, a heat accumulation medium, a heat transmission input device, a heat exchange output device and a heat preservation structure wherein the heat accumulation medium, the heat transmission input device and the heat exchange output device are arranged in the heat accumulation space and the heat preservation structure is located outside the heat accumulation space; the heat accumulation space consists of a plurality of layers of serially connected heat accumulation space units and heat insulation layers between the adjacent heat accumulation space units; and the heat transmission input device and the heat exchange output device are used for carrying out heat transmission and heat exchange in the heat accumulation space, and layered input / output control is carried out on the top and the bottom of the heat accumulation device. Made of low-cost materials such as concrete, magnesia, ceramic, metal plate and the like, the heat accumulation device has low construction cost, stable performance and better performance cost ratio, and is particularly suitable for massively popularizing solar energy.

Description

technical field [0001] The invention relates to a heat storage device, in particular to a heat storage device in a solar photothermal utilization system. Background technique [0002] Solar energy is an ideal new energy source, but there is a problem of timeliness in utilization. The energy received during the sunshine period is more than required, but it cannot function after sunset. Therefore, how to store the excess energy during sunshine for the continuous operation of the system after sunset, that is, to take the excess to make up for the deficiency, has become a key issue in realizing the continuous operation of the solar thermal utilization device. [0003] In the existing solar energy storage technologies, various heat storage media have been reported or used. In recent years, it has been reported that a composite phase change material (shape-fixed phase change material) supported by a specific material as a matrix has been obtained in the laboratory to store heat, ...

AI Technical Summary

Problems solved by technology

The heat storage tank has a vertical temperature gradient, which can be used as high-quality heat as possible, but even after commercialization or industrialization, the overall cost is still expensive, and the system still cannot avoid the corrosiveness of high-temperature molten salt and the heating and melting process after solidification

[0009] The above description is the current heat storage system that is widely used in the world. In order to achieve the goal of thermal energy storage and high-grade utilization, a heat storage medium with fluidity and spatial position transfer is used. Therefore, the overall structure of the existing system Both are relatively complicated, and the manufacturing and operating costs are high; in addition, most of the above-mentioned heat storage media are toxic and highly corrosive, and there are problems such as fires and environmental pollution after leakage

Images