• Sujata Kamboj
• Dr. Sudesh Gandhi
• Dr.Ravi Gupta

Today’s world is full of various forms of energy. Living being uses different forms of energy in one or more ways and so it is important to conserve energy. Energy is one of the major inputs for the economic development of any country. For developing countries, the energy sector assumes a critical importance in view of the ever increasing energy needs requiring huge investments to meet them. Energy demand will grow by 37 percent upto 2040 on planned policies, an average rate of growth 1.1percent per year (International Energy Agency, 2014). Household sector being one of the largest users of energy in India accounts for about 30 percent of final energy consumption which reflects the need of household sector for energy conservation in national energy scenario (Reddy, 2003). The hot water requirements are primarily met presently by combustion of fossil fuels like coal, fuel oil, LPG and electricity. Fossil fuels are lost at the rate of 4 billions tones a year (CIA World Factbook, 2014).The word itself- solar, describes that we are dealing with some renewable energy source for a hot water systems. The present study was conducted in hisar district, Haryana to assessing the quantity of hot water requirement during different months and calculate the economic evaluation and payback period of SWH as compared to other water heating systems. In this paper the main focus is on monetary savings and payback period of SWH in comparison to other water heating systems. Heating 100 litres of water on SWH resulted in saving on annual basis, Rs 6915 in electric geyser, Rs 4149 in improved chulha, Rs 3696 in biomass geyser and Rs 2811in LPG geyser can be saved if SWH is used for heating water in comparison to these systems. Payback period of SWH as compared to electric geyser came out to be around 2 years, 4 years in case of improved chulha, 4.5 years in case of biomass geyser and 6 years in case of LPG geyser. Thus after these many years, cost of heating of water will be almost negligible in case of SWH.

monetary saving, payback period

"Economic evaluation and payback period of SWH as compared to other water heating systems", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 10, page no.518-526, October-2018, Available :http://www.jetir.org/papers/JETIR1810861.pdf

"Economic evaluation and payback period of SWH as compared to other water heating systems", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 10, page no. pp518-526, October-2018, Available at : http://www.jetir.org/papers/JETIR1810861.pdf