A medium-high temperature phase change heat storage solar hot air heater

Abstract

The invention discloses a medium-high temperature phase change heat storage solar hot air heater, which comprises a thermal insulation box body, a heat storage body and a trough type solar heat collector; The normal temperature air supply unit and the air outlet on both sides of the mixing box and communicated with the mixing box, the cavity located below the mixing box and connected to the mixing box, located below the cavity and connected to the outside of the cavity and the insulation box hot air supply unit. The invention can evenly mix the cold and hot air flowing out from the double air duct of the hot air duct and the normal temperature air duct in the air mixing box, and the controller can adjust the speed of the two fans according to the temperature sensor, thereby adjusting the air volume of the hot and cold air to reach the outlet temperature The purpose of stability; adjust the outlet air temperature by adjusting the speed of the two fans to make the outlet air temperature reach the set value; the high heat collection efficiency of the trough solar collector enables the phase change material to obtain high-grade heat energy, and realizes the heating demand at night The utility model has the advantages of simple structure, long running time and convenient use.

Description

technical field [0001] The invention belongs to the technical field of new energy, and relates to a phase change heat storage hot air heater, in particular to a hot air heat storage device which utilizes a trough collector to heat a medium-high temperature phase change heat storage core and is used for local heating of buildings at night. Background technique [0002] In Northwest my country and the Qinghai-Tibet Plateau, due to the low population density, central heating does not conform to economic principles, so decentralized heating has become the main way of building heating. However, the current distributed heating is basically based on the burning of fossil fuels, which has caused considerable environmental pollution. However, such areas are rich in solar energy, such as Tibet, where solar radiation is strong. In order to better apply renewable energy to the required fields and meet the strategic needs of sustainable development, it is best to use solar energy for hea...

AI Technical Summary

Problems solved by technology

However, due to the low flux density of solar energy, the heat storage capacity of the flat-plate phase change device is limited during heat collection, and the melting point of the phase change material that can be selected is low. When it is used for room heating, it is prone to the problem of short heat release time, which cannot meet the long-term requirements. The heating demand at night during the time, the air supply method will also lead to unstable air supply temperature, and the indoor thermal comfort is not high

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