The energy separation and the increase of heating effect and the decrease of cooling effect in the vortex tube with various gases, such as R41, R32, R23, R290, R134a, R1234yf, was studied in the numerically simulated. The pressure field and temperature field and velocity field of the vortex tube were analyzed with R41. The results show that the R41 in the vortex tube, the cold and hot performance will best, the maximum temperature difference what be between cool area and hot area is 5.2 K. The numerical results show that flow motion inside the vortex tube presents extraordinary complicated behavior; The flow inside the vortex tube exist an outer region of quasi-free vortex flow and an inner region of quasi-forced vortex flow; there are the parallel flow, reverse flow and secondary flow in the vortex tube, The interface between parallel flow and reverse flow is that the energy separation place in the vortex tube.

Unfavorable transport properties have always been pointed out as the key factors that hinder the application of ammonia/ionic liquids (NH ₃ /ILs) in absorption cycles, while heat and mass transfer of these new fluids in components have been rarely reported. In this study, a corrugated plate heat exchanger is selected as the geometry for exploring the absorption of NH ₃ in the proposed NH ₃ /ILs working fluids. The process is studied making use of a semi-empirical framework: experimental data is needed to determine unknown information of heat and mass transfer, and a numerical model is developed making use of frequently applied theories. In addition, relevant transport properties of the NH ₃ /ILs working fluids are modeled based on collected experimental data. The proposed model is used to study the heat and mass transfer performance during the absorption of NH ₃ vapor into NH ₃ /ILs fluids. Distribution of local parameters and overall heat and mass transfer characteristics are obtained. The performance of absorption of NH ₃ into different working fluids is investigated as well. The overall heat transfer coefficient is found around 1.4 kW/(m ² ·K) for the most promising working fluid NH ₃ /[emim][SCN].