Most correctly commissioned wood fuel boilers are typically 85-90% ef cient, however its vital that correct fuel is used to attain such high boiler performance. The cost of heat ‘on the meter’ (after the inef ciencies of the boiler) will be the cost shown below divided by the ef ciency of the boiler.
- 50% wet fuel at 3.13p per kWh, equivalent to £70 a tonne, with a caloric value of 2240kWhrs/t.
Based on 55% ef ciency – real price of 5.7p per kWh.
- 35% wet and or contaminated fuel at 3.4p per kWh, equivalent to £105 a tonne, with a calori c value of 3100kWhrs/t.
Based on 65% efficiency – real price of 5.2p per kWh.
- 20% of clean virgin wood chip at 3.62p per kWh, equivalent to £145 a tonne, with a caloric value of 4000kWhrs/t.
Based on 90% efficiency – real price of 4.02p per kWh.
Note: prices can vary from supplier to supplier. Quantities and nal purchase price may be effected by regional market forces. Please ask Chip Chip for a speci c quotation.
More available at: www.chipchip.co.uk