Saturated Virial Coefficient of the Environmentally Friendly Refrigerant Fluids: R365mfc and R152a
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 1
Abstract
This work presents the saturated second Virial coefficient of new environmentally friendly refrigerants 1,1- difluoroethane (R152a) , 1,1,1,3,3-Pentafluorbutane (R365mfc) and their mixture. The vapor phase behavior of the mixture was investigated using the Virial equation of state combined with group contribution method of modified UNIFAC. The work has enabled a highly accurate predicted saturated second Virial coefficient data as function of composition in a temperature range of T=260K to T=380K. The Tsonopoulos second Virial coefficient model has been investigated and compared with experimental data of McLinden et.al from National Institute of Standard and Technology (NIST) . The results yielded a maximum deviation of 4.06%, in a temperature range of T=298-300K,whereas, for a temperature range of T=323-325K a maximum deviation less than 2.59% was recognized for R365mfc. A negative deviation less than 12.3% was achieved for R152a.
Authors and Affiliations
Dr. -Ing. Momin E. Abdalla,
Keywords
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