Comparative Study of New Environmentally Safe Refrigerant Fluids
Comparative Study of New Environmentally Safe Refrigerant Fluids
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Date
2015-05-03
Authors
Mohammed, Momin Elhadi Abdalla
Journal Title
Journal ISSN
Volume Title
Publisher
University of Khartoum
Abstract
Chlorofluorocarbons (CFCs) and Hydro chlorofluorocarbons (HCFCs) based refrigerants
have found widespread uses in home refrigerators, heat pumps, air conditions and chemical
industries such as oxygen liquification, this is primarily due to their nontoxic, nonflammable
nature and their high overall thermodynamic efficiency. However, (CFCs) and (HCFCs) are
character with intermediate to high ozone depletion potential (ODP) and global warming
potential (GWP).As a consequence they will be banned during the next two to four decades in
accordance with Kyoto and Montreal Protocols. The search for potential substitutes is in
progress. Potential substitutes include pure and mixtures of hydro fluorocarbons (HFCs) which
have the potential for matching thermodynamic properties of current working fluids while
meeting several criteria for ODP, GWP, flammability, toxicity and production cost. This research
work is intended to make comparative study between five of the potential substitutes ( R227ea ;
R245fa ; R600 ; R410A binary mixture ; R407C Ternary mixture ) and three of the old
refrigerants ( R12 ; R22 ; R114) that are used in heat pumps. The comparisons were based on
Environmental, Safety and Thermodynamic Criterion. The software of Engineering Equation
Solver (EES) and Reference Fluid Properties (REFPROP) were employed to simulate the heat
pumps under wide range of operation conditions. The results revealed that all the selected newly
refrigerants match the old ones very well in term of safety and thermodynamics, with R227ea,
R600 and R245fa giving the highest coefficient of performance (COP) , R410A and R407C
providing the highest heating capacity, cooling capacity , and vapor pressure
Description
89 Pages
Keywords
Comparative,Study ,Environmentally,Safe,Refrigerant,Fluids;HCFC HydroChlorofluorocarbons;HC Hydro Carbon.;Heat Pump Components;Heating Coefficient of Performance Comparison