Multi-energy hybrid generating system and method based on supercritical carbon dioxide cycle

Abstract

The invention provides a multi-energy hybrid generating system based on supercritical carbon dioxide cycle. The multi-energy hybrid generating system based on supercritical carbon dioxide cycle comprises a supercritical carbon dioxide cycle loop formed by a compressor, a low-temperature regenerator, a geothermal energy heater, a high-temperature regenerator, a solar heater, a boiler, a turbine, anelectric generator, a precooler and a cooler; a geothermy injection-production loop formed by an injection pump, an injection well, a production well and a geothermal energy heat exchanger; and a solar heat conversion loop formed by a cycle pump, a solar concentrating heat collecting system, a heat storage device heat exchanger, a heat storage device, a three-way switching valve, a solar heater,a lithium bromide absorption refrigerator, a cooler and a cooling tower. The invention further provides a multi-energy hybrid generating method based on supercritical carbon dioxide cycle. According to the system, multiple energy is combined, a high-temperature heat source and a low-temperature heat source are complemented, and multi-energy hybrid generation is realized through supercritical carbon dioxide cycle; and not only can the comprehensive energy utilization rate be improved, but also the system is simple, compact in structure, flexible to operate and low in cost.

Description

technical field [0001] The invention relates to a multi-energy hybrid power generation system and method based on a supercritical carbon dioxide cycle, and belongs to the technical field of new energy sources. Background technique [0002] The world today is undergoing an energy revolution. The traditional energy pattern dominated by conventional fossil fuels is changing to a diversified energy supply model, and renewable energy is gradually becoming the main energy source. [0003] The reserves of geothermal energy in the world and in our country are very huge, of which hot dry rock (>150°C) accounts for more than 99%, and the reserve of hot dry rock in my country is equivalent to 2% of my country's total energy consumption in 2010. 4400 times. Recently, in the Gonghe Basin of Qinghai Province, a large-scale usable hot dry rock above 200 °C was discovered, and the recoverable amount is equivalent to three times the total energy consumption in my country in 2016. Hot dry...

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Problems solved by technology

However, only these two energy sources cannot fully meet the power supply requirements: on the one hand, as the base load energy, its capacity is small and the stability is not high enough; on the other hand, as the peak load, its peak shaving ability is not good enough

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