Case study Biomass Heating Economic Evaluation

500kW(th) boiler for a school and swimming pool Biomass Heating - Base Case

HEAT ONLY

POOL

Annual Heat Consumption

1,100,000

kWh

SCHOOL

Annual Heat Consumption

1,250,000

kWh

Variables POOL

Price of Gas

1.50

p/kWh

Wood chip

£30

£/tonne

Discount rate

6

%

Period

20

years

NPV

Cost of biomass system 1

£39,000

Total Net Saving

£92,201

Cost of gas system

£15,000

NPV of scheme

£68,201

Cost differential

£24,000

Cost per tonne of CO2

£16.32

Cost of heating with gas

£16,500

Cost of heating with wood

£8,462

Annual Savings on Fuel

£8,038

CO2 savings per year

209

Tonnes CO2

1 Net after c. 25% capital grant

POOL and SCHOOL

NPV

Cost of biomass system 2

£88,293

Total NPV Saving

£196,973.84

Cost of gas system 3

£47,000

NPV of scheme

£155,680.84

Cost differential

£41,293

Cost per tonne of CO2

-£17.43

Cost of heating with gas

£35,250

Cost of heating with wood

£18,077

Annual Savings on Fuel

£17,173

CO2 savings per year

447

Tonnes CO2

2 Net after c. 25% capital grant

3 includes heat mains

2 Net after c. 25% capital grant

3 includes heat mains

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