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Design and fabrication of low cost solar water heaters

Author

Listed:
  • Hussain, M.
  • Urmee, Tania Parveen

Abstract

We designed two types of very low cost solar water heaters which do not need a water supply connection. The first one consisted of two plastic bowls, one inside the other with 5 cm thickness of insulation in between. A transparent plastic cover was tied around the smaller vessel. It was found that water placed inside the smaller vessel had its temperature raised by 18°C from the ambient temperature within four hours when the average insolation was about 600 kWh/m2. The second one consisted of two earthen vessels in place of plastic bowls. The water temperature rise was 20°C under the same radiation. If either of the heaters was covered with cotton-wool insulation in the afternoon, the temperature remains 13°C above the ambient early next morning. The cost of the material was around US$ 4.50 for the plastic bowl heater while this is around US$ 3.50 for the earthen vessel water heater.

Suggested Citation

  • Hussain, M. & Urmee, Tania Parveen, 1996. "Design and fabrication of low cost solar water heaters," Renewable Energy, Elsevier, vol. 9(1), pages 609-612.
    • Handle: RePEc:eee:renene:v:9:y:1996:i:1:p:609-612
    DOI: 10.1016/0960-1481(96)88362-5
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