buku tentang water heater

Energy and Building

This digital document is a journal article from Energy & Buildings, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Since a majority of residential and industrial building hot water needs are around 50 °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 1.3m^2 and can hold 170l of water, of which extractable volume per day is 100l. Its performance was evaluated under various typical operating conditions. Every morning at about 7:00a.m., 100l 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 °C, the next morning temperatures were lower at 45-50 °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.

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