With the acceleration of research in hydrogen fuel cell industry,the utilization of waste heat(about 70℃)has become an urgent problem to be solved.However,the generation temperature of traditional LiBr/H2O working pair is too high to utilize low-grade heat energy and has the problems of crystallization.Therefore,a new organic working pair R1336mzz(Z)/TEGDME is proposed.The saturated vapor pressure,density,viscosity and specific heat capacity were measured.The mixing enthalpy and specific enthalpy were calculated by NRTL model.The above data are regressed using the least squares method,and the square of the correlation coefficient between the experimental value and the fitting value is greater than 0.999,which is in good agreement.The fitting formula can be used to design and calculate the waste heat refrigeration thermal cycle of the new low temperature working pair.Compared with the LiBr/H2O working pair,the generation temperature of R1336mzz(Z)/TEGDME working pair is reduced by 12℃ and the viscosity by about 30％,which has strong practical application significance.
关键词
低温工质对/吸收式热泵/饱和蒸气压/热物性
Key words
low temperature working pair/absorption heat pump/saturated vapor pressure/thermophysical property
维普
万方数据