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Nat Airconditioning Engineers Private Limited

Comparative Analysis between Domestic Water Heaters & Heat Pump for Residences

Comparative Analysis between Domestic Water Heaters & Heat Pump for Residences
Parameters	Units	Systems
		Domestic Heater	Heat Pump
No of bathrooms	No	100	100
Ltrs / bath	Litres	30	30
Total requirement of hot water to be heated from 20 °C to 50 °C	lts/day	3000	3000
Energy required for heating( Ltrs x Temp Diff )	kCal/day	90000	90000
Energy required in KWH = ( Kcals /860 )	KWH	104.65	104.65
Electrical Energy required for heating/day ( for Domestic Heater )	KWH/day	104.65
Electrical Energy required for heating/day ( for Heat Pump )	KWH/day		44
Cost of energy/kwh	Rs.	10	10
Cost of operations/day	Rs.	1047	440
Energy savings/day	Rs.		607
Energy savings/day	Rs.		221555
Cost of water heaters,installation @Rs 10,000 each	100	1000000
Cost of Heat Pump installation @ Rs 5 lacs( HP)+ Rs 4 lacs (piping and accessories)			900000
Difference in cost of installation			100000
Nett cost savings in instalation and annual operation			321555

Nat Airconditioning Engineers Private Limited

Comparative Analysis between Fuel Fired Boiler & Heat Pump
Parameters	Units	Systems
		Boiler	Heat Pump
Total requirement of hot water to be heated from 20 °C to 50 °C	lts/day	10000	10000
Energy required for heating( Ltrs x Temp Diff )	kCal/day	300000	300000
Energy required in KWH = ( Kcals /860 )	KWH		349
Efficiency of Boiler	%	85
Specific gravity of Diesel		0.89
Calorific value of Diesel	kCal/kg	9850
Diesel consumption	Lts/day	40
Rate of Diesel	Rs./Lts	75
Operational Cost of Fuel fired Boiler per day	Rs./day	3000
Heat Pump capacity ( 22 KW )	kCal/hr		18920
No. of hours of operation of Heat Pump for 10000 lts	Hours		16.00
Gross connected power	kW		8
Net power consumtion	KWH		128.00
Cost Of Power	Rs./kWh		10
Operational Cost of Heat pump per day (8 x 16 X 8 = Rs. 1024 )	Rs./day		1280
Operational Saving per day (3000 - 1280) = Rs 1720	Rs./day		1720
Annual operational Saving ( Rs 1720 x 360)	Rs./Annum		6,19,200