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 heat preservation box body, a heat storage body and a groove type solar heat collector. The heat preservation box body includes: an air mixing box located on the upper portion of the heat preservation, a normal-temperature air supply unit and an air outlet which are formed in the twosides of the air mixing box respectively and communicated with the air mixing box, a cavity which is formed below the air mixing box and communicated with the air mixing box, and a hot air supply unit which is located below the cavity and communicated with the cavity and the exterior of the heat preservation box body. By means of the device, cold and hot air flowing out of double air ducts of thehot air duct and the normal-temperature air duct can be uniformly mixed in the air mixing box, and the controller adjusts the rotating speeds of the two fans according to the temperature sensors, sothat the air volume of the cold and hot air is adjusted, and the purpose of stabilizing the outlet temperature is achieved. The air outlet temperature is adjusted by adjusting the rotating speeds of the two fans, so that the air outlet temperature reaches a set value; due to the high heat collection efficiency of the trough type solar heat collector, the phase change material obtains high-grade heat energy, so that the heating requirement at night is met, the structure is simple, the operation time is long, and use is convenient.

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

Images