The theoretical performances of HCFC123, HFC134a, CFC11, and CFC12 have been assessed as coolants. For a specific amount of desired exergy, more compression work is required for HCFC123 and HFC134a than for CFC11 and CFC12. The differences are not very significant at high evaporation...

Based on the thermodynamic properties of HCFC123 obtained by using a modified Benedict-Webb-Rubin (MBWR) equation of state fit to experimental measurements, the theoretical performance of HCFC123 has been assessed as an alternative to CFC11 by using standard refrigeration parameters, including...

This paper discusses the theoretical differences in performance between using R-12 and R-22 resulting from changes in thermodynamic properties. It also assesses the potential for using R-22 as a replacement for R-12 by considering a case study of an R-12 reciprocating air-conditioning unit...

In this paper the isotropic sky method of Liu and Jordan is used to theoretically estimate the monthly average daily and hourly solar radiation impinging on an unshaded tilted surface in Dhahran, Saudi Arabia. The surface receiving solar radiation is assumed to be fixed at a tilt angle, β,...