Combined cooling power generation composite system based on supercritical organic Rankine cycle

Abstract

The invention provides a combined cooling power generation composite system based on a supercritical organic Rankine cycle and belongs to the field of industrial energy conservation. An expansion machine, a power generator and a steam compressing cold cycling compressor of the Rankine cycle are connected coaxially, same organic working medium is used to be simultaneously cooled in a condenser, and a steam compressing refrigerating cycle is coupled effectively on the basis of basic organic Rankine cycle. In addition, supercritical pressure is used to allow heat rising of organic working medium in a heat absorber to be well matched with temperature changing curve of a heat source, system irreversible loss is further lowered, and waste heat recycling rate is improved. Industrial smoke water heat or other water heat sources are used as driving force, combined cooling power generation is performed by taking refrigerating as priority, refrigerating is not performed by using smoke waste heat for power generation and using power for refrigerating, and accordingly loss caused by energy conversion is reduced. Cooling amount and power output amount can be flexibly adjusted according to cooling amount requirements.

Description

technical field [0001] The name of the invention is a combined cooling and power generation system based on a supercritical organic Rankine cycle, which belongs to the technical field of industrial energy saving. Background technique [0002] With the increasingly tense energy situation, how to make deep use of a large amount of low-grade waste heat contained in industrial production has become one of the key measures for energy conservation and emission reduction in the "Twelfth Five-Year Plan". Industrial boilers widely exist in chemical, cement, glass, steel and other industries, and have the characteristics of large quantity, high energy consumption, and low efficiency. The main reason for the low energy utilization rate is that the exhaust gas temperature is too high. The exhaust gas temperature of industrial boilers in actual production is usually higher than the design exhaust gas temperature by more than 50 ℃, and a large amount of waste heat is wasted. The heat los...

AI Technical Summary

Problems solved by technology

At the same time, due to the demand for cooling capacity in many production processes and in the life of the factory area, at present, fossil fuels are usually used to generate electricity for consumption, and the electricity is transmitted to users through voltage transformation and transmission to drive the vapor compression refrigeration cycle. energy efficiency

With the increase of conversion links and the elongation of the energy conversion chain, its energy loss will increase geometrically, and greatly increase the operating cost and instability of the entire system

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