Energy from Waste: Reuse of Compost Heat as a Source of Renewable Energy

Table 8

Costs benefit analysis.

Method	Compost heat		Solar thermal		Ground source heat pump
	Domestic hot water supply	Spatial heating	Domestic hot water supply	Spatial heating	Domestic hot water supply	Spatial heating
Capital cost (£)	11 662		4180	13 415	5413
Operating Cost (£ yr^-1)	1039		625	940	840
Fraction Provided	78%	91%	60%	35%	50%	100%
kWh yr^-1 required	2667	11 760	2667	11 760	2667	11 760
Cost per kWh (£)	0.4994	0.0971	0.3905	0.2284	0.6298	0.0714