System and method for combining power generation, heat supply, refrigeration and water taking based on chemical heat storage

Abstract

The invention discloses a system and method for combining power generation, heat supply, refrigeration and water taking based on chemical heat storage. In the system, a first hydrated salt-based heatstorage material absorbs heat to be subjected to a desorption reaction to generate water vapor, or the first hydrated salt-based heat storage material and water from a first valve are subjected to a hydration reaction to release reaction heat, a first power generation unit comprises a first steam turbine doing work through superheated steam expansion and a first power generator coaxially connectedwith the first steam turbine, a second hydrated salt-based heat storage material absorbs heat to be subjected to a desorption reaction to generate water vapor, or the second hydrated salt-based heatstorage material and water from a second valve are subjected to a hydration reaction to release reaction heat, the desorption temperature of the second hydrated salt-based heat storage material is lower than the desorption temperature of the first hydrated salt-based heat storage material, a second power generation unit comprises a second steam turbine doing work through expansion of high-pressuresuperheated steam and a second power generator coaxially connected with the second steam turbine, and a refrigeration unit is connected with a second circulation loop through a three-way valve for refrigeration.

Description

technical field [0001] The invention relates to the technical field of chemical heat storage and electricity generation, heat supply, refrigeration, and air water intake, in particular to a system and method for combining electricity generation, heating, cooling, water intake based on chemical heat storage. Background technique [0002] With the continuous development of modern society, human's demand for energy has increased dramatically. At the same time, the problems of traditional energy depletion and environmental pollution have become increasingly serious. In order to solve the intermittency and instability of renewable energy such as solar energy, storing it for a specific time when it is in excess, that is, thermal energy storage and conversion technology, is a common way to effectively use energy. Compared with sensible heat and phase change heat storage, chemical heat storage has a greater heat storage density, and the form of energy conversion is from thermal ener...

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Problems solved by technology

[0003] However, there are no theoretical studies and engineering applications based on solar chemical heat storage systems that combine multiple functions such as power generation, heating, cooling, and air water intake.

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