Supercritical carbon dioxide compression cycle test bench

Abstract

The invention relates to a supercritical carbon dioxide compression cycle test bench. The supercritical carbon dioxide compression cycle test bench is formed by integrating a magnetic suspension motor module, a gas compressor module, a cooling module, a pressure reducing valve module and a sensor module. The rotating speed and the load of a magnetic suspension motor are changed through a magnetic suspension motor monitoring unit in the supercritical carbon dioxide closed circulation measurement and control platform, and different degrees of supercharge ratios of a gas compressor are controlled; the heat exchange effect of the cooler is controlled by changing the opening degree of a circulating water pump in the cooler. Through the use of the pressure reducing valve, the isentropic expansion process of working of the turbine in the Brayton cycle is simulated, and the pressure reducing valve can be controlled through the industrial personal computer so as to adjust the state of an outlet working medium. By monitoring the temperature and the pressure of the key measuring point and the mass flow rate of the supercritical carbon dioxide in the pipeline, the key performance of the supercritical carbon dioxide Brayton cycle core equipment can be tested, the influence of the supercritical carbon dioxide Brayton cycle core equipment on the Brayton thermodynamic cycle is researched, and the working state of the supercritical carbon dioxide Brayton cycle core equipment is monitored.

Description

technical field [0001] The invention relates to the technical field of waste heat utilization of marine diesel engines, in particular to a supercritical carbon dioxide compression cycle test bench. Background technique [0002] Supercritical carbon dioxide (S-CO 2 ) Brayton cycle power generation system uses carbon dioxide in a supercritical state as a circulating working medium to convert the heat of the heat source into mechanical energy and finally output electrical energy. The cycle process is: first, supercritical carbon dioxide is boosted by a compressor, that is Isentropic compression process; then, use the heat exchanger to heat the working medium isobarically, that is, the isobaric heating process; secondly, the working medium enters the turbine, pushes the turbine to do work, and the turbine drives the motor to generate electricity, that is, the isentropic expansion process; finally, the working medium Enter the cooler, return to the initial state, and then enter ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a supercritical carbon dioxide compression cycle test bench, which is a supercritical carbon dioxide Brayton cycle power system The simplification of the structure, using the adiabatic expansion process of the pressure reducing valve to replace the isobaric endothermic process of waste heat absorption and the adiabatic expansion process of the turbine, focusing on the performance of the core equipment of the supercritical carbon dioxide Brayton cycle and its influence on the Brayton thermodynamic cycle influences

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