Single-tank/double-tank combined heat accumulation system for solar thermal power generation, and heat accumulation method of single-tank/double-tank combined heat accumulation system

Abstract

Disclosed are a single-tank / double-tank combined heat accumulation system for solar thermal power generation, and a heat accumulation method of the single-tank / double-tank combined heat accumulation system. The single-tank / double-tank combined heat accumulation system for solar thermal power generation comprises a single-tank thermocline heat accumulation subsystem, a double-tank heat accumulation subsystem, connecting pipelines, valves and the like. The single-tank thermocline heat accumulation subsystem comprises a single thermocline storage tank which is filled with heat-accumulating medium and which is covered with an insulation layer, and the top and bottom of the storage tank are provided with opening passages respectively, used for allowing fluid to access the accumulation tank. The double-tank heat accumulation subsystem comprises a cold fluid storage tank and a hot fluid storage tank both covered with insulation layers, cold fluid and hot fluid are stored in the tanks respectively, and the tanks are provided with a cold fluid pump and a hot fluid pump respectively, and each tank is provided with a fluid inlet pipe. Operating modes of the single-tank / double-tank combined heat accumulation system for solar thermal power generation include radiation-fluctuation-free continuous heat accumulation in daytime, radiation-fluctuation alternate heat accumulation and discharge in daytime, continuous heat discharge after disappearance of radiation, and auxiliary heat release in system stoppage and before starting.

Description

technical field [0001] The invention relates to a high-temperature heat storage system integrating a single-tank thermocline layer heat storage system and a double-tank heat storage system. Background technique [0002] In the field of solar thermal utilization, especially in the field of solar thermal power generation, due to the strong discontinuity and instability of solar radiation, the operation of the system also has strong fluctuations and intermittent. In order to ensure the stable operation of the solar thermal utilization system and make up for the differences in quantity, form, time and space between the supply and demand of energy, the solar thermal utilization system generally has a heat storage system. The heat storage system can convert the solar radiation during the day into heat and store it, and then release the heat for use when there is no solar radiation. Especially for solar thermal power generation systems, the introduction of thermal storage systems ...

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to overcome the shortcomings of the above-mentioned existing solar thermal power generation heat storage systems, and provide a solar thermal system with high heat storage capacity, low cost and stable performance for large-capacity heat storage and complex radiation fluctuation requirements. Heat storage system for power generation

Images