Solar supercritical carbon dioxide dual-cycle power generation system and method

Abstract

The invention provides a solar supercritical carbon dioxide dual-cycle power generation system and method. The solar supercritical carbon dioxide dual-cycle power generation method comprises the following steps that a solar light gathering and heat collecting unit is used for receiving gathered solar radiation energy, the received solar radiation energy is converted into high-temperature heat energy through a heat transfer working medium, and the high-temperature heat energy serves as a heat source to be conveyed to a supercritical carbon dioxide power generation unit; the supercritical carbondioxide power generation unit heats a supercritical carbon dioxide working medium through high-temperature heat energy, converts the received heat energy into electric energy through a turbine and agenerator set and outputs the electric energy; and a Kalina cycle power generation unit takes a heat transfer working medium of the solar light gathering and heat collecting unit and supercritical carbon dioxide waste heat generated after the supercritical carbon dioxide power generation unit works as driving heat sources, and heat release and heat absorption are carried out in the absorption anddesorption process of an absorbent on a refrigerant, so that power generation is achieved, and the generated medium-temperature heat energy is conveyed to the supercritical carbon dioxide power generation unit. The structure realizes gradient utilization of heat energy and improves the energy utilization efficiency.

Description

technical field [0001] The invention belongs to the technical field of supercritical carbon dioxide power generation, and in particular relates to a solar supercritical carbon dioxide double cycle power generation system and method. Background technique [0002] Energy and the environment are two major problems facing the development of human society. Continuously improving the efficiency of generator sets is the eternal theme and goal of power industry research. At present, the power cycles commonly used in solar thermal power generation systems include the Rankine cycle with water as the working medium and the Brayton cycle with air as the working medium, and the system efficiency is limited to a certain extent. [0003] In order to break through the bottleneck of traditional power systems, some advanced power systems with new concepts have attracted more and more attention from academia and industry. Supercritical working fluids represented by supercritical carbon dioxide...

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Problems solved by technology

[0005] The object of the present invention is to provide a solar energy supercritical carbon dioxide dual cycle power generation system and method, which solves the above-mentioned deficiencies in the existing power generation system using supercritical carbon dioxide as a working medium

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