Cavity type heat absorber and heat absorbing and storing system

Abstract

The invention discloses a cavity type heat absorber and a heat absorbing and storing system. A cavity type heat absorbing opening is formed in the front wall of a cavity type heat absorber body; a heat absorbing pipe set is arranged on the outer surface of the front wall; the heat absorbing pipe set is located on at least one side of the cavity type heat absorbing opening; solar energy of a mirror field is collected to the cavity type heat absorbing opening, the energy flux density in the cavity type heat absorbing opening is high, the solar energy enters the cavity type heat absorber through the cavity type heat absorbing opening to heat particles, and therefore the function of a particle heat absorber is achieved. However, the energy flux density around the cavity type heat absorbing opening is relatively low, but the requirement for the energy flux density of a heat absorption and storage medium with low heat absorption temperature can still be met, and therefore the heat of the part can be absorbed through the heat absorbing pipe set. Heat absorption and storage media with different heat absorption temperatures are adopted, the media with high heat absorption temperature are matched with SCO2 cycle power generation, and the media with low heat absorption temperature are matched with steam Rankine cycle power generation. The two circulation systems are both located in a temperature interval with high efficiency, and the problem that an existing cavity type heat absorber is low in heat absorption efficiency is solved.

Description

technical field [0001] The invention belongs to the technical field of solar thermal power generation, and in particular relates to a cavity-type heat absorber and a heat absorption and storage system. Background technique [0002] With the goal of "carbon peaking and carbon neutrality", solar thermal power generation technology has received widespread attention, but the cost per kilowatt-hour of solar thermal power generation technology limits its application and development. Improving the power generation efficiency of power stations is one of the important measures to reduce power generation costs. Supercritical carbon dioxide (SCO 2 ) Brayton cycle power generation system has high power generation efficiency, and has received extensive attention from scholars. Related research results show that for heat source temperatures below 550 °C, the efficiency of the steam Rankine cycle is higher than that of the SCO 2 cycle; and when the temperature range of the heat source i...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a cavity heat absorber and a heat absorption and storage system to solve the problem of low heat absorption efficiency of the existing cavity heat absorber

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