Solar supercritical carbon dioxide cycle power generation and steam electrolysis hydrogen production coupled system

Abstract

The invention discloses a solar supercritical carbon dioxide cycle power generation and steam electrolysis hydrogen production coupled system comprising a compressor, a heat regenerator, a preheater, a high-concentration solar energy receiver, a steam superheater, a high-pressure carbon dioxide turbine, a reheater, a low-pressure carbon dioxide turbine, a generator, a cooler, a steam generator and a solid oxide electrolytic bath. The solar thermal power generation system adopts a supercritical carbon dioxide cycle and provides a high-temperature heat source and low-cost electricity for steam electrolysis hydrogen. Waste heat of steam electrolysis hydrogen production is recycled through the reheater and the preheater, so that the cycle thermal efficiency of the solar thermal power generation system is improved, and the grade of the thermal energy output by the solar thermal power generation system is improved. In addition, the gas flow entering the regenerator is reduced in a flow distributing manner, and the problem that the regenerator generates a heat exchange pinch point because the specific heat capacities of the fluid on the high-pressure side and the fluid on the low-pressure side are different is solved. The solar supercritical carbon dioxide cycle power generation and steam electrolysis hydrogen production coupled system has the advantages of being high in cycle thermal efficiency, high in energy utilization rate, low in hydrogen production cost and low in power generation cost.

Description

Technical field [0001] The invention belongs to the technical fields of solar thermal power generation technology and water electrolysis hydrogen production technology, and particularly relates to a solar supercritical carbon dioxide cycle power generation coupled with water vapor electrolysis hydrogen production system. Background technique [0002] Solar energy is an inexhaustible and inexhaustible clean and renewable energy. Faced with energy shortages and environmental pollution worldwide, solar energy has become the main body of energy development in the future, and solar power generation will also become a major source of energy in the future. The main force of large-scale power. Solar power generation is divided into solar thermal power generation and photovoltaic power generation. According to the characteristics of scale, the future development potential of solar thermal power generation is greater than that of the photovoltaic power generation industry. The current com...

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Problems solved by technology

At present, the mature hydrogen production technologies are mainly fossil fuel hydrogen production and water electrolysis hydrogen production. Mineral fuel hydrogen production consumes primary energy, the process is complicated, and the pollution is serious, which fails to solve energy and environmental problems. Water electrolysis hydrogen production is a completely clean production method. The hydrogen method has the characteristics of high product purity and easy operation. At the same time, the water resource is relatively abundant, but the energy consumption is high and the efficiency is low.

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