Cold, heat and electricity cogeneration system coupling condensation decoupling and cascade evaporation

Abstract

The invention discloses a cold, heat and electricity cogeneration system coupling condensation decoupling and cascade evaporation. The cold, heat and electricity cogeneration system coupling condensation decoupling and cascade evaporation comprises a first evaporator, a first expansion machine, a second expansion machine, a condenser, a first flowmeter, a first working medium pump, a second evaporator, a second flowmeter, a second working medium pump, a third flowmeter, a dynamometer, a heat exchanger, a fourth flowmeter, a fifth flowmeter, a throttle valve, a third evaporator, a compressor, asixth flowmeter, a seventh flowmeter, an air compressor, an air cooler and a third expansion machine. The cold, heat and electricity cogeneration system combines four subsystems of an ORC electricitygeneration system, a vapor compression refrigeration system, a condensation and environment decoupling cooling system and a heat supply system. The ORC electricity generation system, the vapor compression refrigeration system, and the condensation and environment decoupling cooling system are coupled together through a shared condenser, and the vapor compression refrigeration system and the ORC electricity generation system can share the same organic working medium, so that condensation decoupling, cascade evaporation and non-azeotropic mixed working medium temperature change phase change arecoupled.

Description

technical field [0001] The invention belongs to the field of thermal energy engineering, in particular to a condensation decoupling and cascade evaporation coupling cooling, heating and power cogeneration system. Background technique [0002] Organic Rankine Cycle (ORC) is a way of using organic working fluid as a thermodynamic cycle, using geothermal energy, solar energy or other low-grade heat sources to heat the organic working fluid to generate steam, thereby driving the turbogenerator set generate electricity. The inlet temperature of the heat source fluid in the Organic Rankine cycle is usually above 80°C, and the evaporator is the part that produces the largest irreversible loss in the ORC. increase. Therefore, the multi-stage evaporator is reasonably set up to connect the heat source fluid with the evaporators at all levels, so that the liquid working medium is heated into saturated or superheated steam at different pressures in the evaporators at all levels, there...

AI Technical Summary

Problems solved by technology

However, the current combined cooling, heating and power systems are mostly based on the combination of gas turbines, steam Rankine cycle and absorption refrigeration. Although the combustion of fuel can obtain high-grade energy, the exhaust heat temperature of the system is still high. , can't make the best use of

At the same time, the burning of fossil fuels has also caused a certain degree of pollution to the environment.

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