Energy conservation and payback periods of collector-cum-storage type solar water-heaters

N. M. Nahar and Jagdish P. Gupta

Applied Energy, 1989, vol. 34, issue 2, 155-162

Abstract: The performance of the collector-cum-storage type solar water-heater is compared with those of water-heaters using different fuels, viz.firewood, coal, kerosene and electricity. The payback periods have been calculated by considering compound interest, maintenance cost and inflation in fuel prices and maintenance per year. The payback periods for solar water-heaters with selective surfaces and single glass covers are 4·09-7·51 years for winter use only and 2·36-4·19 years for year round use. The payback period increases, according to the fuel used, in the sequence firewood, coal, electricity and kerosene.

Date: 1989
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