HFC134a/HC600a/HC290 mixture a retrofit for CFC12 systems |
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Authors: | S.J. Sekhar D.M. Lal |
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Affiliation: | Department of Mechanical Engineering, Anna University, Chennai 600025, India |
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Abstract: | The environmental concerns with the impact of refrigerant emissions lead to the importance in identifying a long-term alternative to meet all requirements in respect of system performance and service. Even though HFC134a and HC blend (containing 55.2% HC600a and 44.8% HC290 by weight) have been reported to be substitutes for CFC12, they have their own drawbacks in respect of energy efficiency/flammability/serviceability aspects of the system. In this present work, experimental investigation has been carried out on the performance of an ozone friendly refrigerant mixture (containing HFC134a/HC blend) in two low temperature systems (a 165 l domestic refrigerator and a 400 l deep freezer) and two medium temperature systems [a 165 l vending machine (visi cooler) and a 3.5 kW walk-in cooler]. The oil miscibility of the new mixture with mineral oil was also studied and found to be good. The HFC134a/HC blend mixture that contains 9% HC blend (by weight) has better performance resulting in 10–30% and 5–15% less energy consumption (than CFC12) in medium and low temperature system, respectively. |
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Keywords: | Mixture Refrigerant R134a Hydrocarbon Experiment Miscibility OilMots clé s: Mé lange Frigorigè ne R134a Hydrocarbure Expé rimentation Miscibilité Huile |
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