In the following simulations, the TVRC using refrigerant R600a or the mixture
R290/R600a and the MVRC operating with the mixture R290/R600a will be
considered. For the reason that system operating conditions such as the FE inlet
temperature 6 t , condenser outlet temperature 4 t and the compositions ratio of
mixture z could affect the performance of the MVRC significantly when using
zeotropic mixture as refrigerant, so the operating conditions are assumed as follows: