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Section II

Analysis of Energy Efficiency of Domestic Refrigerators


G. S. R. Costa ,

National Engineering Research and Development Centre, LK
About G. S. R.

Research Engineer


B.Sc. Eng. (Moratuwa), AMIE(SL)

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D. D. Ananda Namal

National Engineering Research and Development Centre, LK
About D. D. Ananda

Director General


M.Eng.(Moratuwa), C.Eng., MIE(SL) B.Sc. Eng. (Peradeniya)

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As refrigerator is a very common appliance in almost every household and it is the number one domestic appliance which operates whole day, it tends to consume a considerable amount of energy out of the whole country’s domestic energy consumption. Personal as well as national level benefits can be achieved if energy efficient refrigerators were identified from available refrigerator types in the market. When empirical and theoretical results are perused it comes to note that there is no study done to understand the energy efficiency of various types of refrigerators by analyzing a large sample of real data. This study is a quantitative analysis of energy consumption of more than 40 samples of experimental results of key types of domestic refrigerators. The experiments were conducted inside a testing laboratory and energy consumption pattern was obtained from tested data. By analyzing the results, it was observed that inverter refrigerators are 22 % energy efficient than normal automatic defrosting refrigerators and 10% energy efficient than manual defrosting refrigerators. This outcome is mainly beneficial to general public as well as energy conservation policy makers for future decision making. It is recommended to promote inverter refrigerators for the case of national benefit.
How to Cite: Costa, G.S.R. and Namal, D.D.A., 2019. Analysis of Energy Efficiency of Domestic Refrigerators. Engineer: Journal of the Institution of Engineers, Sri Lanka, 52(3), pp.43–50. DOI:
Published on 31 Dec 2019.
Peer Reviewed


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