Renewable Energy Case Study
“Merlewood” close to Grange-Over-Sands in Cumbria is a Lakeland home of the Holiday Property Bond. The first phase which became operational in May 2011, involved the conversion of the house into 9 apartments and a leisure centre. The second phase comprises of 46 new build apartments which are due for completion in the summer of 2012.
The site is served by a 500 KW biomass boiler. Woodchip is sourced locally and delivered from a local depot. The boiler is fed via a leaf spring /auger system from the adjacent chip store. The chip store is positioned within the landscape to allow delivery vehicles to tip directly into the store via a simple key switch powered lid.
After some initial commissioning issues the boiler has been operating at part load without issue. Heat from the boiler is delivered to a large thermal store. Heat is then distributed around the site via pre-insulated below ground pipework into a series of plate heat exchangers and multi-energy tanks which generate domestic hot water and low pressure hot water. Oil fired boilers provide back-up and peak lopping.
The Client needed a financially viable “green” solution to the non-availability of natural gas to the site. The relative cost of woodchip compared with oil indicates a “payback” during years 6 to 7 without RHI (renewable heat incentive). The build is compliant under Part L.