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Title: Performance study of CO2 heat pump under tropical conditions of Singapore
Authors: Soh, Alexander
Dubey, Swapnil
Keywords: Science::Physics
Heat Pump
Residential Water Heating
Issue Date: 2019
Source: Soh, A., & Dubey, S. (2019). Performance Study of CO2 Heat Pump under Tropical Conditions of Singapore. Energy Procedia, 158, 1366-1371. doi:10.1016/j.egypro.2019.01.335
Series/Report no.: Energy Procedia
Abstract: In tackling the rising energy consumption incurred in residential water heating applications in Singapore, alternatives to traditional water-heating systems, which account for one-fifth the energy consumption of an average household, are being explored. One such alternative is heat-pump water heaters, which have been gaining ground in Singapore market. However, most conventional heat-pump water heaters using traditional refrigerants such as R22 or R134a, which could not reach temperatures high enough for comfortable use for showering and baths without compromising efficiency. In this study, a commercial heat-pump water using Carbon Dioxide as the refrigerant in a transcritical cycle was experimentally studied at heating temperature of 65oC and 80oC to evaluate the impacts of tropical climate on its performance. Average coefficient of performance (COP) of CO2 heat pump for tank heating temperature of 65oC and 80oC was found to be 5.4 and 3.8, respectively.
ISSN: 1876-6102
DOI: 10.1016/j.egypro.2019.01.335
Rights: © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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