Thermal performance of n built-in storage water heaters (or shallow solar ponds) in series

Abstract This note presents an analysis of the thermal performance of n built-in storage water heaters (or shallowsolar ponds), connected in series. It is seen that for typical parameters, three or four built in storage tanks may be connected in series for significantly better performance. Numerical calculations have been made for two typical days, viz. 26 May 1978 and 28 April 1979 at Delhi.