Pipe-cavity integrated disc solar heat receiver

Abstract

The invention relates to a pipe-cavity integrated disc solar heat receiver. An integrated structure of a heat absorption cavity and a heat exchanging pipeline is adopted, the cylindrical cavity is provided with two rows of pores to form a circulating pipeline of the gas; the heat exchanging gas flows in an air passage at a high speed and takes away the heat; two groups of the air passages are connected with two gas distribution / gas collection covers via a vent pipe respectively, and the gas distribution / gas collection covers play a role in distributing the gas and collecting the gas alternately during the continuous operation of a system. The inlet of the heat absorption cavity is provided with an annular diffuse reflector, and the bottom of the heat absorption cavity is provided with a diffuse reflecting cone to reduce the radiation heat loss of the heat absorption cavity. The invention solves the thermal fatigue problem generally existent in the conventional direct receiver compared with the past direct solar heat receiver. The receiver has a more compact structure and a longer service life; meanwhile the system has the advantages of small air resistance, good air-tightness, high heat exchanging efficiency and the like, so the overall operation efficiency and the stability of the disc system are facilitated.

Description

technical field [0001] The invention relates to a solar heat receiver, in particular to a dish-type solar heat receiver integrated with a cavity. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, people urgently need to find clean alternative energy sources. Solar energy is widely distributed on the earth, and solar thermal power generation technology is considered to be the most promising clean energy technology. Dish-Stirling solar thermal power generation is one of the highest photoelectric conversion efficiency methods in solar thermal power generation technology. It gathers solar radiation into a thermal receiver through a rotating parabolic dish concentrator, and the receiver absorbs the energy and then the The Stirling heat engine realizes the conversion of solar energy into electrical energy. Generally, the power of solar Stirling engines is relatively small, which is suitable for distributed energy utilization an...

AI Technical Summary

Problems solved by technology

Traditional direct receivers often use bent heating tubes to form heat-absorbing surfaces or cavities, which are prone to local damage or air leakage, resulting in extremely high material requirements for the system and greatly increased costs

At home and abroad, a small number of other types of direct receivers have also been tried to develop, and the reliability of the receiver has been improved. However, compared with the traditional tubular direct heater, its air resistance becomes larger, and the airtightness is difficult to guarantee. Stirling Therefore, it is of great significance to design a heat receiver with relatively uniform heat flow distribution, small air resistance, and airtightness for dish solar thermal power generation systems.

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