New flat-plate heat sink for solar tower power generation and systems using it

Abstract

The invention discloses a new flat-plate heat absorber for solar tower power generation and a system using it. The system includes a windshield, a flat-plate heat absorber and a circulation pipeline, wherein the flat-plate heat absorber is a photothermal conversion And the main element of heat transfer, the windshield avoids the heat loss of the heat absorber, and the circulation pipeline ensures the circulation of the working fluid. During the working process, the heat transfer fluid in the flat plate heat absorber absorbs heat and evaporates from the evaporating surface, releases heat and condenses on the condensing surface, and the condensed heat transfer fluid flows back to the evaporating surface to enter the next round of cycle work, through the gas-liquid phase change The process transfers heat to the working fluid. The flat plate heat absorber of the present invention reduces the height of the heat absorber by more than half compared with the traditional heat pipe heat absorber through the innovation of the layout and structure of the grille, reduces the windward area and lowers the center of gravity, and improves its stability. At the same time, the indirect heat transfer method of the heat pipe principle is adopted, so that the flat heat absorber can withstand high heat flux density and thermal shock, and prolong its service life.

Description

technical field [0001] The invention relates to a flat-plate heat absorber suitable for solar tower power generation and a system using the same, belonging to the technical field of high-temperature heat utilization of solar energy. Background technique [0002] In the 21st century, with the depletion of fossil fuels and the increasingly serious environmental pollution, energy issues have become the bottleneck restricting the rapid development of my country's economy. As a renewable energy with huge energy storage, clean and environmentally friendly, and widely distributed, solar energy is becoming a hot spot in the field of energy research, development and utilization. Among them, the tower type solar thermal power generation system has the advantages of high concentration multiple, high light-to-heat conversion efficiency and low power generation cost, and has been developed rapidly; however, the heat absorber of the tower type solar thermal power generation Working under...

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Problems solved by technology

[0004] The object of the present invention is to provide a new flat-plate heat absorber for solar tower power generation. There is a problem that the service life of the heat absorber is too short due to local overheating and thermal fatigue under the thermal load of unsteady state, unevenness and high energy flux density

At the same time, the flat-plate heat absorber has a lower center of gravity and volume under the same heat absorption area, which can solve the problems of the existing heat pipe heat absorber with too high height, center of gravity and too large volume

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