Hot plates of wall type solar energy collector and manufacturing method

Abstract

A solar ¿C energy heat collector of wall heat plate type is prepared as setting heat collector in building wall facing to sunlight, forming said collector by N numbers of rectangular heat plates being laid in parallel and tilted way, forming heat collection tube by welding metal shell to form cavity, setting heat exchanger above heat collection tube, connecting heat exchange cavity said exchanger to heat collection tube and setting insulation layer under heat plate. The method for preparing said heat collector is also disclosed.

Description

technical field [0001] The invention belongs to the field of solar energy application, and relates to a wall hot plate type solar heat collector and a manufacturing method thereof. technical background [0002] In the solar thermal utilization system, the collector is a key product. The application of solar energy in our country started relatively late. At present, the solar collectors in our country are mainly of glass vacuum tube type, accounting for 63.16%. The all-glass vacuum tube solar collector has the disadvantages of low heat collection temperature, limited heat collection area, can only be placed on the roof, and does not coordinate with buildings, which hinders the application and development of solar heat collectors. Therefore, the development of flat-plate solar collectors is a direction for future solar energy applications. In the existing flat-plate solar collectors, a heat-collecting element is a composite plate core formed by copper tubes and aluminum fins...

AI Technical Summary

Problems solved by technology

In the existing flat-plate solar collectors, a heat-collecting element is a composite plate core formed by copper tubes and aluminum fins. Due to the different expansion coefficients of copper and aluminum, after repeated thermal expansion and contraction, the difference between the two It will generate a large thermal resistance, resulting in more heat loss, resulting in low heat collection efficiency

The other is the heat-pipe flat-plate solar collector developed in recent years. The basic structure of the heat-collecting element is a heat pipe. A fin integrated with the heat pipe is connected to the heat pipe to absorb solar heat through a large-area heat-absorbing fin. It is transmitted to the heat pipe integrated with it, and the heat is exchanged with the heat exchanger through the condensing end of the heat pipe. These heat pipes are installed in a shell, and the upper cover of the shell is equipped with transparent glass or solar panels. It is very small, and only part of the solar heat absorbed by the fins is transferred to the heat pipe, so the overall thermal efficiency of the collector is relatively low; The narrow channel passes through, and the upper and lower paths of the working medium are not smooth, which also affects the heat exchange efficiency

Furthermore, limited by the limited space in the wall, it is difficult for the lighting surface of the wall collector to be perpendicular or nearly perpendicular to the incident light, so that the thermal efficiency is not high when the lighting area is the same. The heat collection efficiency of the heat collector is even lower; at the same time, due to the existing heat pipe flat-plate solar heat collector, its heat collection components are heat pipes, and the production processes of heat pipes are many and complicated, which is not conducive to large-scale continuous operation. Therefore, the production efficiency is low and the overall production cost is high

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