Case Study

Clune Mushrooms

Wood Pellet Heating for the Mushroom Farming Sector


Mushroom Farm Size13 Tunnel

Biomass Solution200kW HeatCube

Boiler ManufacturerTURCO

Date InstalledAugust 2012

Clune Mushrooms is a Co-operative Mushroom Producer (CMP) member which supplies mushrooms to the UK retail multiples each week. Clune Mushrooms has decided to install a 200kW HeatCube Pellet boiler solution. Clune Mushrooms annual oil bill was €60,000 for 2011.

During 2012 Clune Mushrooms evaluated various energy efficiency options i.e. Air Source Heat Pump (ASHP), Wood Chip and Wood Pellet Heating. In particular, the farm trialled an HeatCube with a 100kW WOODSMAN Wood Pellet Boiler on seven tunnels. It also trialled an ASHP on one tunnel.

The results were monitored over a 4 month period (August to November). The running cost of the Pellet Boiler System over the 4 month period averaged €0.053/ kWh (£0.042/kWh).

The ASHP during the same period had an average running cost of €0.047/kWh (£0.038/kWh). However the ASHP Co-Efficient of Performance (COP) varied wildly from 1.1 to 9.09 depending on the weather (which was un-seasonally mild for much of the trial period). As we approached November the COP was dropping considerably as temperatures dropped below 5°C. The ASHP had to be supplemented by the old oil boiler which had a running cost of €0.14/kWh (£0.11/kWh).

Clune Mushrooms concluded that wood pellet offered the cheapest most consistent running costs and has now installed a 200kW HeatCube to heat his entire farm of 13 mushroom tunnels. The owner fully expects to halve his heating costs during 2014 by switching to wood pellet. There are no Government incentives like the RHI in the Irish Republic.

I am happy to report that after 12 months of operation my 125kW HeatCube has realised savings of over 60%. I spent €56,000 on oil in 2012 and in 2013 I spent only €18,500 on wood pellets. This has made an enormous difference to my business. Many thanks for your support and your excellent technical support team.

Paul Waters

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