A solar heat collection automatic cascade phase change heat storage energy cascade utilization device

Abstract

The invention proposes a solar heat collection automatic gradient phase change heat storage energy gradient utilization device. The device comprises such parts as a solar heat collecting layer, a gradient phase change heat storage layer, an automatic heat conducting layer and a shell. The solar heat collecting layer is arranged on the outer side of a high-temperature phase change heat storage layer; the gradient phase change heat storage layer includes the high-temperature phase change heat storage layer, a medium-temperature phase change heat storage layer and a low-temperature phase change heat storage layer; and the automatic heat conducting layer is arranged among the phase change heat storage layers for automatically building / cutting a transfer heat bridge among the phase change heat storage layers. The solar heat collection automatic gradient phase change heat storage energy gradient utilization device can adapt to solar radiation change to automatically adjust the quality of a phase change material participating in heat storage, to guarantee the phase change material to fully generate the phase change and to fully exert the phase change potential of the phase change material, and can realize gradient utilization of solar heat energy to achieve the purpose of improving the solar utilization rate.

Description

technical field [0001] The invention relates to the technical field of solar energy utilization and phase change heat storage, and more specifically relates to a solar energy automatic cascade phase change heat storage energy cascade utilization device. Background technique [0002] Due to the instability and intermittent nature of solar energy, it has brought great difficulties to the utilization of solar energy. Phase change materials have the characteristics of large heat storage and heat storage and release at approximately constant temperature, which can well balance the imbalance between solar energy supply and heat energy demand, and have great application potential. But in the existing solar phase change material heating technology, the phase change temperature and heat storage capacity of the phase change material are all fixed, and such technology has the following disadvantages: (1) in the weather with strong solar radiation, the solar thermal energy supplied to t...

AI Technical Summary

Problems solved by technology

But in the existing solar phase change material heating technology, the phase change temperature and heat storage capacity of the phase change material are all fixed, and such technology has the following disadvantages: (1) in the weather with strong solar radiation, the solar thermal energy supplied to the phase change material If it is too large, the phase change material will be overheated, which will affect the service life of the phase change material

(2) In the weather with weak solar radiation, the solar heat energy supplied to the phase change material is too little, the phase change material cannot be completely phase changed, and the energy storage potential of the phase change material is not fully utilized

(3) The solar heat collector and the phase change heat storage device are set separately, and the middle is connected by pipes, etc., so that the system efficiency is reduced due to the heat dissipation of the pipes and the addition of a heat exchange link

In the prior art, there is no technology that can automatically adjust the quality and heat storage temperature of phase change materials involved in heat storage according to solar radiation

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