Experimental study on the adiabatic frictional pressure drop of R32,R1234ze(E)and their mixed refrigerants in a minichannel
The adiabatic two-phase frictional pressure drop characteristics of R32,R1234ze(E)and their mixed refrigerants in a minichannel were investigated experimentally,and the influences of mass flux,vapor quality,saturation temperature and the mass ratio of the mixed refrigerants on the two-phase frictional pressure drop of the adiabatic flow in the minichannel were investigated.The findings indicate that the adiabatic two-phase friction pressure drop escalates with the rising of mass flux and vapor quality for both single and mixed refrigerants,but the escalation is slow in the low and high vapor quality regions;the adiabatic two-phase friction pressure drop for both single and mixed refrigerants diminishes as the saturation temperature rises.The adiabatic two-phase friction pressure drop of the mixed refrigerants closely resembles that of R32.The effect of mass flux and vapor quality on the change of adiabatic two-phase friction pressure drop of the refrigerants is significant,and the effect of saturation temperature and mixed refrigerants mass ratio on the change of adiabatic two-phase friction pressure drop is smaller compared with that of mass flux and va-por quality.
minichannelR32R1234ze(E)mixed refrigerantsadiabatic flowtwo-phase frictional pressure drop
NETL
NSTL
万方数据
