Energy storage and heat supply device capable of collecting and utilizing latent heat of vaporization of phase change material

Abstract

The invention relates to an energy storage and heat supply device capable of collecting and utilizing latent heat of vaporization of a phase change material, and belongs to the field of energy storage and heat supply of the phase change material. The energy storage and heat supply device comprises a heat storage box body, a latent heat of vaporization energy storage tank, a connecting pipe, a phase change material heat exchanger, a latent heat of vaporization heat exchanger, a heat exchange coil pipe, a preheating coil pipe and a central controller. When the energy storage and heat supply device carries out heat storage and heat release on the phase change material, a central control unit automatically controls a three-way valve, a heat storage and heat release pump and a heat exchange pump to work. The heat storage and heat exchange process of the phase change material is achieved through transmission of a heat exchange medium in the device and heat exchange with the phase change material. In the heat storage process of the phase change material, an energy storage material in the latent heat of vaporization energy storage tank can store latent heat of vaporization absorbed by the heat exchange medium, and the latent heat of vaporization is used for preheating the heat exchange medium when the phase change material releases heat. Meanwhile, after the heat exchange medium absorbs the latent heat of vaporization, water molecules can be condensed and flow back into the phase change material.

Description

technical field [0001] The invention relates to the technical field of energy storage heat supply devices, in particular to an energy storage heat supply device that collects and utilizes latent heat of vaporization of phase change materials. Background technique [0002] Crystalline hydrated salt is one of the inorganic phase change materials. Because of its high heat storage density and high thermal conductivity, it is usually used as a phase change material for phase change energy storage heating devices. [0003] However, the heating and melting temperature of phase change materials for crystalline hydrated salts is generally close to or higher than 100°C, so the water molecules in the crystalline hydrated salts in the melted state will be vaporized into water molecules and lost, and the crystalline hydrated salts that lose water will Agglomeration occurs, so it cannot be used for a long time, and at the same time, part of the energy will be taken away, resulting in wast...

AI Technical Summary

Problems solved by technology

[0005] For this reason, the present invention provides an energy storage heat supply device that collects and utilizes the latent heat of vaporization of phase change materials to overcome the phase change of crystal hydrated salts in the prior art The material cannot be used for a long time, and the energy loss caused by the vaporization and evaporation of water molecules during the heat storage process

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