Assessment of R-438A as a retrofit refrigerant for R-22 in direct expansion water chiller |
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| Affiliation: | 1. Department of Materials Science and Engineering, Ghent University, Technologiepark-Zwijnaarde 903, 9052 Zwijnaarde, Belgium;2. Department of Physics, Catholic University of Leuven - KULAK, Etienne-Sabbelaan 52, 8500 Kortrijk, Belgium;3. Department Mechanics of Materials and Constructions, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium;1. Danfoss A/S, Refrigeration and Air Conditioning, 6430 Nordborg, Denmark;2. Royal Institute of Technology, Department of Energy Technology, Division of Applied Thermodynamics and Refrigeration, Stockholm, Sweden;3. Technical University of Denmark, Department of Mechanical Engineering, Lyngby, Denmark;1. Department of Informatics, Aristotle University of Thessaloniki, Thessaloniki, Greece;2. School of Science and Technology, International Hellenic University, Thessaloniki, Greece;3. Information Technologies Institute, Centre of Research & Technology - Hellas, Thessaloniki, Greece;4. Department of Informatics, University of Sussex, UK;5. Department of Information Studies, University College London, UK |
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| Abstract: | The present work aims to evaluate the performance characteristics of a vapor compression refrigeration system using R-438A as a retrofit refrigerant for R-22. In order to achieve this objective, a test facility is developed and experiments are performed over a wide range of chilled water inlet temperature (11:20 °C), condenser water inlet temperature (25:35 °C) and condenser water mass flow rate (363:543 kg h?1). Results showed that as the chilled water inlet temperature changes from 11.5 to 20.5 °C, system COP increases from 1.78 to 2.07 at constant condenser water inlet temperature of 25.5 °C. Cooling capacity and COP of the system using R-438A are lower than R-22 by 11% and 12.5%, respectively. However, compressor discharge temperature using R-438A is slightly lower than R-22 which confirms that R-438A can be used as a retrofit refrigerant for R-22 to complete the remaining life time of the existing plants. |
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| Keywords: | R-438A Air conditioning Experimental Vapor compression refrigeration system Performance R-438A Conditionnement d'air Expérimental Système frigorifique à compression de vapeur Performance |
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