Solar energy high-temperature storing and releasing system based on thermochemical method

Abstract

The invention discloses a solar energy high-temperature storing and releasing system based on a thermochemical method. The solar energy high-temperature storing and releasing system comprises a heat transferring fluid supply subsystem, a reaction subsystem, a heat exchange subsystem, a condensing subsystem, a water steam generating subsystem, a water supply system and a Rankine steam electric generator set. Heat transferring fluid in a cold storing tank absorbs solar heat through a solar heat collector to become high-temperature heat transferring fluid and then enters a heat storing tank. At the time of heat storing, the high-temperature heat transferring fluid flows out from the bottom of the heat storing tank, flows into a heat exchange pipe inlet of a heat storing/releasing reactor and provides the heat for the reactor. Hydroxides on a reaction bed layer are subjected to a heat absorption and decomposition reaction to achieve heat energy storing. At the time of heat releasing, a steam generator provides water steam for the reactor, a hydration reaction is conducted, a large amount of heat is released, and heat energy is provided for the Rankine steam electric generator set through two modes of direct and indirect heat exchange. According to the solar energy high-temperature storing and releasing system, the requirement for energy saving and emission reduction can be met, the efficient, stable and high-grade heat energy is provided for solar energy heat power generating, and continuous operation of the heat power generating system is achieved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature storage of solar thermal energy, and in particular relates to a thermochemical heat storage / release system that stores the heat of solar energy through the decomposition of metal hydroxides and releases it when needed. Background technique [0002] With the development and progress of society, human beings' demand for energy is also increasing. At present, the global primary energy composition is mainly composed of fossil fuels. However, fossil fuels are non-renewable and cause environmental pollution during use. This prompts people to look for renewable energy that is both renewable and does not cause environmental pollution. "Energy, environment, and development" are the three major themes facing human beings. Among these three, the rational development and utilization of energy directly affects environmental protection and the sustainable development of human society. Attention from...

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Problems solved by technology

[0003] However, there are still many problems to be solved for the widespread application of pure solar thermal pow...

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