Thermal performance analysis of a new type compressor heat discharge vortex tube-ORC system
In order to efficiently recover the exhaust waste heat and residual pressure of the compressor,a new vortex tube organic Rankine cycle(VT-ORC)system was proposed by combining vortex tube and organic Rankine cycle(ORC).The VT-ORC system was simulated taking the exhaust gas of 343.15-373.15 K and 0.30-0.65 MPa as the heat source,and the simulation results were analyzed.The results show that compared with the traditional ORC system,the thermal efficiency of VT-ORC system is similar,but the net output work of VT-ORC system is greatly improved.R236fa has the highest system thermal efficiency of 16.66％under different evaporation pressures.Within the allowable evaporation pressure range,the highest net output power of 590.23 kW can be obtained by using R1234yf.By changing the valve opening of the vortex tube and adjusting the cold and heat flow ratio at the outlet of the vortex tube,a larger net output power of the system can be achieved when the heat flow ratio is small,and the system exergy loss decreases with the increase of the heat flow ratio.With the increase of compressor exhaust pressure,the heat flow temperature at the outlet of vortex tube increases,and the heat amount of the system absorption increases,but the heat exchange temperature difference of the evaporator also rise and the system exergy loss increases.
exhaust gas recoveryorganic rankine cyclevortex tubeheat flux ratioworking fluid screening
NETL
NSTL
万方数据
维普
