If the boiler is running at 50% ef ciency due to poor quality, wet and/or contaminated fuel, it will use twice as much wood fuel to achieve the same RHI.
For example, a 205kW biomass boiler running 3000hrs per annum should generate around 615,000kWhrs/yr. However, if poor quality, wet (40% moisture content and above) and or contaminated fuel is used, then the ef ciency and output can drop dramatically, in some cases by as much as 50% if the boiler isn’t designed to run on high moisture content fuel. At the very least, more fuel will be required and at worst valuable RHI payments will be effected and maintenance bills will soar.
Chip Chip – Getting the Best out of Biomass
Most people make sure they are getting the highest bank interest rates and are paying the lowest tax…
…but fewer people check their boiler performance to make sure its running at the highest efficiency.
Using Wet And Inadequate Fuel Will;
Effect and reduce your RHI payments as your meter will not be registering the heat generated that it should be and fuel consumption (measured by the tonne) will increase.
When broken down, you’ll see there are many effects:
> more fuel used
> more deliveries & disruption > more maintenance
> less RHI income earned
Burn Less – Get More
205kW x 3000hrs = 615,000kWhrs
RHI Payments (at Nov 2015) = 1314hrs x 205kW x 5.18p = £13,953.37 plus 1686hrs x 205kW x 2.24p = £7,742.11. Total RHI Payments = £21,695.48/yr
Chip Chip fuel
– 615,000kWhrs divided by 4000kWhrs (calori c value of Chip Chip fuel) = 153.7 tonnes/yr.
Wet fuel at 45% moisture content
– 615,000kWhrs divided by 2540kWhrs (the calori c value of poor quality fuel) = 242 tonnes.
(This assumes the same boiler efficiency. In reality, boilers using wetter fuel are likely to be less efficient and so will actually use even more fuel).
Saving Over 90 Tonnes Of Fuel Per Year.
Find out more at: www.chipchip.co.uk