Solar phase change thermal storage heating apparatus and method

Abstract

The invention relates to a solar phase change thermal storage heating apparatus and a solar phase change thermal storage heating method. The apparatus comprises a thermal storage box body consisting of a thermal insulation material and transparent insulation boards, phase change thermal storage small balls, a circulating fan and a heating fan. In the daytime, the solar radiation of the sunlight is converted into heat energy through the transparent insulation boards, the heat is adsorbed by the surfaces of the thermal storage small balls, the temperatures of the thermal storage balls are risen and the heat is transferred to phase change materials through heat conduction, the phase change materials are molten and the energy is stored; and after the temperatures of the thermal storage small balls on the upper layer reach the phase change temperature of the phase change materials in the thermal storage small balls on the upper layer, the circulating fan is started to timely transfer the adsorbed surplus solar radiation energy to the thermal storage small balls on the lower layers by a convection heat transfer mode and the energy is stored. At night, when the indoor temperature is excessively low, an air inlet is opened, the circulating fan is shut down and the heating fan is started to drive the air to flow, so that the heat is rapidly extracted from the thermal storage small balls to heat a room.

Description

technical field [0001] The invention relates to a solar energy storage and release technology, in particular to a solar phase change heat storage heating device and method that can be widely used in indoor heating of buildings, agricultural greenhouses and other facilities. Background technique [0002] The supply of solar energy is random, intermittent, affected by regular changes in geography, day and night and seasons, and restricted by random factors such as cloudy, cloudy and rainy. Therefore, the use of solar energy for heating is subject to solar radiation and its own characteristics of low energy density and periodic fluctuations, which greatly limit the application of solar energy technology. Passive solar heating technology uses methods such as heat-collecting walls and benefit windows to achieve solar heat gain during the day, but it cannot get solar energy at night. [0003] In order to overcome this defect, electric heating is usually used as a supplement, whic...

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Problems solved by technology

[0004] The object of the present invention is to provide a solar thermal storage device that can overcome the shortcomings of large solar thermal storage volume and low energy storage density, has strong thermal storage capacity, compact structure, and high thermal efficiency, so that the thermal storage device can fully absorb solar radiation and store energy during the daytime. Solar phase change heat storage heating device and method for heating at night

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