Ship waste heat-driving CO2 supercritical power generation coupled transcritical refrigeration cycle system

Abstract

The invention relates to the technical field of ship waste heat power generation, and discloses a ship waste heat-driving CO2 supercritical power generation coupled transcritical refrigeration cycle system comprising a supercritical carbon dioxide power generation system with CO2 as a circulating working fluid, and a carbon dioxide transcritical refrigeration system, wherein the supercritical carbon dioxide power generation system comprises a heat recovery device, an expander, a generator, a power generation cycle regenerator, a mixer I, a seawater desalination heat exchanger, a gas cooler, asplit valve I and a high pressure compressor; the carbon dioxide transcritical refrigeration system comprises a medium pressure compressor, the mixer I, the seawater desalination heat exchanger, the gas cooler, the split valve I, a subcooler, a sea water pump II, a refrigeration cycle regenerator, an expansion valve I, a gas-liquid separator, a split valve II, a high temperature evaporator, an expansion valve II, an evaporation condenser, a low pressure compressor and a mixer II. The invention effectively utilizes the thermal performance of carbon dioxide to have the coupling effect on the waste heat recovery working condition and the cooling working condition, so as to realize the combined design of the power generation function and the refrigeration function.

Description

technical field [0001] The invention relates to the technical field of waste heat power generation of ship main engines, in particular to a CO 2 Supercritical power generation coupled with transcritical refrigeration cycle system. Background technique [0002] During the working process of the main engine of the ship, a large amount of waste heat is generated, including the exhaust heat of the diesel engine. In view of this situation, it is of great significance to use the waste heat in a reasonable way for energy saving and environmental protection. The current research on ship waste heat recovery technology mainly includes turbine system, Rankine cycle, seawater desalination, waste heat refrigeration, thermoelectric power generation, etc. Existing waste heat power cycles mainly include organic Rankine cycle (ORC), organic transcritical cycle (OTC), traditional steam Rankine cycle, etc. to recover waste heat for power generation, but the waste heat utilization rate and po...

AI Technical Summary

Problems solved by technology

[0004] A complete cooling system is an important auxiliary system for the normal operation of ships. Most of the traditional refrigeration systems equipped with ships are traditional compression vapor refrigeration equipment. Although they can meet the daily needs of ships, they consume a lot of energy and are scattered and occupy a large area. , high safety performance requirements

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