Combined cooling-heating-power system and method

Abstract

The invention provides a combined cooling-heating-power system. The combined cooling-heating-power system comprises a gas internal combustion engine, an exhaust gas discharging loop, a cylinder sleeve cooling water loop, a low-temperature cooling water loop, a heat supply loop, a lithium-bromide absorption-type refrigerating machine, a supercritical carbon dioxide cycle subsystem, and an organic working medium cycle subsystem. The invention further provides a combined cooling-heating-power method. The method comprises the steps that the gas internal combustion engine works and drives an electric generator to generate electricity, released waste heat is recycled and utilized through the exhaust gas discharging loop, the cylinder sleeve cooling water loop and the low-temperature cooling water loop, waste heat of the gas internal combustion engine is distributed, the effect that cold energy, heat energy and electric energy of different proportions are output to the heat supply loop, the supercritical carbon dioxide cycle subsystem and the organic working medium cycle subsystem is achieved, and combined cooling, heating and power supply is achieved. According to the combined cooling-heating-power system and method, the combined supercritical carbon dioxide and organic working medium cycle efficiency is high, and the waste heat electricity generation efficiency and output power of the gas internal combustion engine are remarkably improved. The combined cooling-heating-power system is simple, compact in structure, low in cost and capable of being applied to distributed energy resources.

Description

technical field [0001] The invention relates to a combined cooling, heating and power supply system based on a combined cycle of a gas internal combustion engine, supercritical carbon dioxide and an organic working medium and a working method thereof, belonging to the technical field of distributed energy sources. Background technique [0002] Natural gas is a high-quality, stable, efficient, safe, non-toxic and low-pollution clean energy. It occupies an important position in the world's energy structure and is also one of the main directions for future energy technology development. Gas-fired cooling, heating and power distributed energy is an excellent way to efficiently utilize natural gas, which can realize the organic unity of high-quality electricity and low-quality cooling and heating energy requirements. Both at home and abroad attach great importance to gas-fired cooling, heating and power distributed energy, especially in developed countries and regions such as the...

AI Technical Summary

Problems solved by technology

The outstanding advantages of gas-fired internal combustion engines are high power generation efficiency, strong environmental adaptability, low unit cost, low gas pressure required, simple operation, and reliable operation. However, there are also problems in the use of waste heat.

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