Feed In Tariff - Biomass
An example based on a building with a Heat demand of approx 20kW.
20kW x 90 hours per week x 29 weeks per year = 52,200kWh x 0.65 = 33,930kWh
(weather diversification factor - this allows for changes in weather conditions over the winter period)
Wood has a calorific value of 5.5kW per kg approx., with pellets at 20% moisture this would reduce down to 4.4kW per kW or 4400kWh per tonne.
To produce 33,930 you would require 7.7 tonnes of pellet fuel (33,930 / 4400kW)
RHI benefit on above consumption would be as follows:
1314 heating hours x (25kW, rated capacity of boiler) = 32,850 at Tier 1 tariff * 7.9p = £2,595.15
Then 1080kWh at Tier 2 tariff * 2p = £21
Assuming the following:
Pellet Cost @ 7.7 tonnes x £220 per delivered tonne pellets = £1694 p.a.
(4.9p/kW i.e. £1694/33930kWh)
Oil cost would be approx 6/7p/kW so saving based on 6.5p/kW would be
1.6p/kW x 33930kWh = £542.88
RHI benefit £2626
Overall annual savings/benefit = £3,168.88
* Feed In Tariffs are currently only available for commercial buildings only.
