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The influence of oil viscosity and refrigerant quality on evaporator performance
Author(s) -
McMullan J. T.,
Hewitt N. J.,
Masson A. J.,
Murphy N. E.
Publication year - 1992
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440160702
Subject(s) - refrigerant , evaporator , viscosity , petroleum engineering , thermodynamics , chemistry , gas oil ratio , materials science , composite material , heat exchanger , engineering , physics
The presence of oil in an evaporator degrades performance by reducing evaporator heat pick‐up and by increasing the evaporator pressure drops. It can be demonstrated that there is an optimum refrigerant mass flow rate for a given refrigerant‐oil combination and oil concentration. Also, oil viscosity has an effect on the evaporator performance at low oil concentrations. Finally, it is suggested that low viscosity oil be used at low oil concentrations and high viscosity oil at high oil concentrations.