A high-temperature solid heat storage system for photothermal power generation

Abstract

The invention provides a photo-thermal power generation high-temperature solid heat storage system which comprises a heat fetching subsystem, a heat storage subsystem and a heat consumption subsystem.According to the system, solar light is focused on a tower solar heat collector through a multi-surface heliostat, circulating air and a high-temperature heat absorbing plate in the heat collector are subjected to radial convective heating to obtain high temperature, one path of the high-temperature air enters a high-temperature solid heat accumulator so that the heat accumulation temperature canbe as high as 900 DEG C, the other path of the high-temperature air can directly enter air heat users or enter a steam boiler to generate overheat steam, and the overheat steam enters a turbine set to act and generate power and then is supplied to low-pressure steam heat users so that combined heat and power generation can be achieved. The system can continuously, stably, safely and reliably provide a high-temperature heat source, can achieve all-weather running by adoption of the heat subsystems, and can meet the different requirements of the heat users, the energy utilization efficiency isgreatly improved, the using amount of conventional energy is reduced, environment pollution is effectively reduced, and the economic and social benefits are good.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a high-temperature solid heat storage system for photothermal power generation. Background technique [0002] At present, the most successful example of solar thermal utilization is solar water heaters. Due to the various technical requirements of solar water heaters and the low temperature of hot water (generally 40-90°C), and it is mainly used for domestic hot water, it has been widely promoted and is currently the most widely used. However, due to the low water temperature of ordinary solar water heaters, the industrial application is limited. [0003] In recent years, medium and high temperature solar thermal utilization technology has received great attention from domestic research institutions and related enterprises, mainly focusing on the research of large-scale solar thermal power generation technology. The most critical technology in solar thermal power generati...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: in order to overcome the problem of low heat storage temperature in the prior art, provide a high-temperature solid heat storage system for photothermal power generation, use high-temperature solid heat storage materials to increase the heat storage temperature of the heat accumulator, and ensure all-weather The operation of heat users' water, steam and power generation systems further improves the utilization efficiency of solar energy

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