Every two weeks when the weather is cold the Park’s boiler needs feeding with a trailer load of chip.  The current stock comes from over 100 Beech trees which were felled alongside the A3 two years ago. These were removed due to road safety concerns  raised by the Highways Agency.

The  cut timber has to season for at least one year to reduce the moisture content to below 30%. At this point a contractor is used to chip a barn full. The boiler is an 85KW Froling from Austria. Each kW of heat requires approximately 1 tonne of woodchip per year. There is a standard specification of chip for this size of boiler that is expressed as a G50/W40. This means that the majority of chips will be 50mm in size and have a moisture content of up to 40%.

Loading chip store using trailer and elevator

Loading chip store using trailer and elevator

 Wood fuelled heating delivers  a very substantial CO2 emission reduction when compared to using fossil fuels, even when transport and processing are considered. The boiler has  automated ignition and ash removal. With good quality chip less than 1% of the dry matter is left as ash. This is the 4th winter that the biomass boiler has been providing all the heat and some of the hot water for the visitor centre, associated buildings and offices.

85KW boiler with 2000 litre buffer tank

85KW boiler with 2000 litre buffer tank

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