Disc type power generation device based on V-shaped heat absorption wall cavity type solar absorber

Abstract

The invention discloses a disc type power generation device based on a V-shaped heat absorption wall cavity type solar absorber. The device comprises a light-heat conversion unit and a supercritical CO2 brayton cycle power generation system; the light-heat conversion unit comprises a V-shaped heat absorption wall cavity type solar absorber, collecting lenses and CO2 pipeline, wherein a plurality of collecting lenses are uniformly arranged on the periphery of the V-shaped heat absorption wall cavity type solar energy absorber, and the V-shaped heat absorption wall cavity type solar energy absorber is connected to the supercritical CO2 brayton cycle power generation system through the CO2 pipeline; the V-shaped heat absorption wall cavity type solar energy absorber is internally provided with a V-shaped heat absorption cavity assembly, wherein the V-shaped heat absorption cavity assembly comprises a plurality of heat exchange layers, an included angle alpha is formed between every two adjacent heat exchange layers, V-shaped closed spaces are arranged as heat preservation chambers or heat absorption cavities, the heat preservation chambers and the heat absorption chambers are alternately arranged, and an optical incident window directly faces the heat absorption chamber; and a heat exchange pipe is embedded into the heat exchange layers. The device has the advantages of being highin thermoelectric conversion efficiency, high in power generation efficiency, low in cost and the like. The invention belongs to the technical field of solar disc type power generation.

Description

technical field [0001] The invention belongs to the technical field of solar dish power generation, and in particular relates to a dish power generation device based on a V-shaped heat-absorbing wall-cavity solar absorber. Background technique [0002] Solar energy is a kind of clean energy, and realizing efficient utilization of solar energy has always been the dream of mankind. The current solar energy utilization methods mainly include photovoltaic power generation, photothermal power generation and thermochemical application of solar energy. Constrained by the development of solar cell materials, it is difficult to increase the efficiency of photovoltaic power generation in a short period of time. Therefore, it is of great significance to carry out research on solar thermal utilization. According to the form of solar concentration, solar thermal power generation can be mainly divided into three types: trough type, tower type and dish type. Judging from the current com...

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Problems solved by technology

However, the current cavity absorber, which is the core device of the dish solar thermal power generation system, often cannot simultaneously reduce heat loss, improve light-to-heat conversion efficiency, and effectively store heat.

Moreover, the current solar power generation system generally uses the Rankine cycle, which uses the focused sunlight to heat the heat transfer fluid and drive the steam turbine to generate electricity. Not only is it not suitable for water-scarce areas, but also the thermoelectric conversion efficiency is low.

In addition, the construction and production of thermal power stations often have a large demand for high-temperature molten salt for heat storage, and the cost of power generation is easily affected by the price of molten salt

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