A 550kW Binder underfed-hearth boiler serving three properties in a community heating network including Ceredigion County Hall in Aberaeron, Ceredigion, Wales. The system is designed to work on either wood-pellets or wood-chips. A large subterranean fuel store has been designed to accommodate 40m3 tipping trailers for ease of delivery.
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Florence Brown School in south Bristol caters for up to 204 children aged 4 to 16 years with complex needs. Facilities at the school include an indoor heated hydrotherapy/swimming pool which is kept at a temperature of 30Deg.C during term time.
The school buildings and indoor swimming pool are heated with a 230kW Binder boiler with a step-grate combustion system capable of using wood chip fuel up to 50% moisture content. The wood fuel supply for the school comes from Bristol City Council's wood fuel supply depot at Blaise Nursery. The Binder boiler system is housed in a standard container avoiding the need for a new boiler house. The fuel store is external to the container with dimensions 4m by 4m with a depth of 2.5m giving an active volume of approximately 35m3. The topography of the site was used to allow wood chip delivery vehicles delivery by tipping wood chip fuel into the fuel store. The Binder boiler has a fully automatic heat exchanger tubes cleaning system, exhaust gas recirculation to allow the combustion temperature to be controlled to avoid clinkering and an exhaust gas cyclone to remove fly ash. The system also has automatic ash removal which is transferred from the boiler to a closed steel bin outside of the container.
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HMP Guys Marsh was originally opened in 1960 as a borstal and became a Young Offenders Institution (YOI) in 1984. After completion of perimeter fencing in 1992 it became a closed establishment and started to accommodate adults. Guys Marsh has grown to become a combined YOI and prison holding up to 578 people.
The Assembly and Training workshops offer facilities for training courses over a range of skills including building and construction. The workshops were originally heated with a medium pressure hot water heating calorifier which was decommissioned several years ago. Temporary heating was provided with a series of portable peak-electric heaters which were extremely costly to run. It was decided to provide heat to the workshops using a single biomass boiler system. The main drivers for this change were partly to reduce heating costs, reduce CO2 emissions and also to use locally derived fuel.
Blaise Nursery is managed by Bristol City Council contract services and consists of c. 10,000m2 of glass houses and poly-tunnels providing bedding plants for Bristol Parks and Civil Amenities. The site is also a wood recycling centre where arboriculture arisings are brought from in and around the city.
The glass houses used to be heated with LPG direct heaters. It was decided to replace these heaters with a single biomass boiler system with heat distribution via a new district heating system. The biomass boiler was selected to deal with a wide range of low quality biomass fuel including high-moisture content and high leaf and bark content material available on site. A large pole barn was built on site as a wood-fuel depot, supplying not only Blaise but other local biomass installations.
The Blaise Nursery boiler was the winner of the 2006 South West of England Green Energy Awards in the category of "Best New Renewable Energy Scheme".
Wood Energy Ltd, Registered in England and Wales, Company No. 04269709 Registered address: Wood Energy Ltd, Pinkworthy Barn, Oakford, Tiverton, Devon EX16 9EU Tel: +44 (0) 845 070 7338, Fax: +44 (0) 845 070 7339