Reheating solar heat utilization system and operation mode thereof

Abstract

The invention relates to a reheating solar heat utilization system and an operation mode thereof; the solar heat utilization efficiency is further improved. The reheating solar heat utilization system is provided with multiple sets of heat storage devices; each set of heat storage devices comprises an overheating heat accumulator, a reheating heat accumulator and an evaporation heat accumulator, wherein the overheating heat accumulator and the reheating heat accumulator are connected in series with the evaporation heat accumulator after being connected in parallel; during the heat removal process of a heat-transfer medium of heat release circulation, firstly, heat is removed from the evaporation heat accumulators and the overheating heat accumulators to apply work on a high-pressure cylinder, and then, the heat is removed from the overheating heat accumulators to apply work on a medium and low-pressure combined cylinder. The reheating solar heat utilization system disclosed by the invention has the advantages that the heat is removed for two times to apply work during a heat release process, and the heat is utilized more efficiently; meanwhile, a heat storage interval is divided into two sections by utilizing the parallel connection and the series connection of three heat accumulators, so that the heat utilization rate of a reheating process is improved.

Description

Technical field [0001] The invention relates to a solar thermal utilization system, in particular to a reheating solar thermal utilization system and its operation mode. Background technique [0002] Solar energy is a kind of new energy with nearly unlimited reserves, widely distributed, and clean energy. The development and utilization of solar energy has attracted more and more attention. At the same time, solar energy also has the characteristics of low energy density and changes with seasons and weather conditions, resulting in unstable energy output during solar energy utilization. By storing heat, converting solar energy into a form that can be stored is the main method to solve this problem. The key issue is to use a suitable system to store and use energy efficiently. [0003] The traditional solar thermal utilization system uses molten salt as a medium, and the molten salt needs to be circulated in a molten state. The amount of molten salt used is large and the heat utili...

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Problems solved by technology

[0006] The purpose of the present invention is to propose a reheating solar heat utilization system and the operation mode of the system in view of the problem that the existing solar heat utilization system loses a lot of heat energy after taking heat and doing work, and there is room for further improvement

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