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Performance evaluation of an integrated solar water heater as an option for building energy conservation

Dharuman, C and Arakeri, JH and Srinivasan, Kandadai (2006) Performance evaluation of an integrated solar water heater as an option for building energy conservation. In: Energy and Buildings, 38 (3). pp. 214-219.

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Official URL: http://dx.doi.org/10.1016/j.enbuild.2005.05.007


Since a majority of residential and industrial building hot water needs are around 50 degrees C, an integrated solar water heater could provide a bulk source that blends collection and storage into one unit. This paper describes the design, construction and performance test results of one such water-heating device. The test unit has an absorber area of 1.3 m(2) and can hold 1701 of water, of which extractable volume per day is 1001. Its performance was evaluated under various typical operating conditions. Every morning at about 7:00 a.m., 1001 of hot water were drawn from the sump and replaced with cold water from the mains. Although, during most of the days, the peak temperatures of water obtained are between 50 and 60 degrees C, the next morning temperatures were lower at 45-50 degrees C. Daytime collection efficiencies of about 60% and overall efficiencies of about 40% were obtained. Tests were conducted with and without stratification. Night radiation losses were reduced by use of a screen insulation.

Item Type: Journal Article
Publication: Energy and Buildings
Publisher: Elsevier science
Additional Information: Copyright of this article belongs to Elsevier science.
Keywords: Solar energy; Convection; Screen insulation; Integrated solar water heater; Energy storage.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 02 Sep 2010 09:58
Last Modified: 19 Sep 2010 06:15
URI: http://eprints.iisc.ac.in/id/eprint/31917

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