Solar thermal collector and method of using same for converting solar energy into moderate temperature heat

Abstract

The invention discloses a solar thermal collector which comprises a thermal collection pipe, a framework, a reflecting plate and a reflecting plate rotation control device; the reflecting plate is positioned on the back side of the thermal collection pipe, and a focal axis of the reflecting plate is coincident with the axis of the thermal collection pipe; the reflecting plate is used for gathering the solar energy onto a thermal absorbing body of the thermal collection pipe; the reflecting plate rotation control device is used for driving the reflecting plate to rotate by taking the focal axis as a center, so that the reflecting plate can rotate along the change of sunshine. The invention further discloses a method for converting solar energy into mesothermal heat energy by utilizing the solar thermal collector, so that the self tracking of sunshine can be realized, the problems of common tank type, tower type, butterfly type, Fresnel type thermal collection modes are high in cost, and incapable of combining with a factory building and the problem that the non-tracking focusing mode is small in focusing ratio can be solved, 4-20 times of solar focusing ratio can be realized, solar energy is efficiently converted into mesthermal heat energy to obtain a stable mesothermal heat source of 100DEG C-300DEG C.

Description

technical field [0001] The invention relates to a flat-plate focusing type medium-temperature solar heat collector and a method for preparing a medium-temperature heat source, in particular to a solar heat collector and a method for converting solar energy into medium-temperature heat energy by utilizing the same. Background technique [0002] Medium-temperature solar thermal utilization technology is the main development trend of solar thermal utilization technology in the future. Its main work is mainly between 100°C and 300°C. It can be widely used in many industries such as food, chemical industry, drying, power generation, clothing, printing and dyeing, etc., and has broad market prospects. At present, solar thermal utilization technology mainly focuses on low-temperature heat utilization (below 80°C) and high-temperature power generation applications (above 400°C). Low-temperature solar heat utilization technology, because its working temperature is below 80°C, the e...

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Problems solved by technology

[0004] The object of the present invention aims at the deficiencies of the above-mentioned prior art to provide a kind of solar heat collector and the method that utilizes it to convert solar energy into medium-temperature heat energy, this solar heat collector and the method that utilizes it to convert solar energy into medium-temperature heat energy It can realize self-tracking of sunlight, and the invention solves the problems of high cost of general trough, tower, butterfly and Fresnel heat collection modes, which cannot be combined with factory buildings, and the non-tracking focus mode with small focus ratio The problem is that a solar focusing ratio of 4 to 20 times can be achieved. Through the present invention, solar energy can be efficiently converted into medium-temperature heat energy, and a stable medium-temperature heat source of 100°C to 300°C can be obtained.

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