Thermal optimisation of a built-in storage solar water heater

J. K. Nayak, N. K. Dhiman and G. N. Tiwari

Applied Energy, 1982, vol. 10, issue 3, 169-176

Abstract: A simple transient analysis of a built-in storage solar water heater is presented; the results obtained by the present theory are in close agreement with experimental observations as well as with predictions obtained by a more rigorous theory. The water heater consits of an insulated rectangular tank whose top surface is suitably blackened by blackboard paint and then glazed. The unit is exposed to solar radiation during sunshine hours and is covered by adequate insulation at night. The effect of insulation thicknesses (top and bottom insulation) and water mass in the tank is discussed. The importance of using a reflecting sheet instead of insulation is emphasised.

Date: 1982
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