سال انتشار: ۱۳۸۲
محل انتشار: هشتمین کنگره ملی مهندسی شیمی ایران
تعداد صفحات: ۶
Hatamipour – Chem. Eng. Dept., University of Isfahan, Isfahan, I.R. Iran
Aghamiri – S.F. Aghamiri: Chem Eng. Dept., Isfahan university, Isfahan, Iran
Moshfeghian – M. Moshfeghian: Chem. Eng. Dept., University of Qatar, Doha, Qatar
Ozone depleting and warming potential of CFC and HCFC refrigerants led the developed countries to agree on Montreal protocol, according to which the production and consumption of these substances must be prohibited before 2010. In this relation, a great number of efforts has been taken to find suitable substitutes for Ozone Depleting Substances (ODS). R-134a, which is a HFC, has been found to be an optimum solution for short time substitution. Unfortunately, the global warming potential (GWP) of this gas is much more than CFCs. Several research projects have shown that hydrocarbons such as propane,butane, and isobutane are very good substitutes for CFCs. These natural refrigerants have zero Ozonedepleting potential and negligible GWP. In this paper, the possibility of using HCs as substitutes for CFCs has been investigated, and a computer simulation of a small refrigeration cycle with various refrigerantshas been made by use of a revised version of GCAP. The results show that a hydrocarbon mixture with40% propane (R-290), 50% butane (R-600) and 10% i-butane (R-600a) is the most suitable alternative
refrigerant with the best performance among all other hydrocarbon mixtures investigated.