Case Studies - March 2011 1 Englefield House

1 Case Studies - March 2011

Englefield House

www.englefieldestate.co.uk


Englefield village


Englefield (continued)

EnglefieldHouse

Polo stables


Englefield (continued)


Princes Risborough

Development site owned by the SE

Regional Development

Agency


Princes Risborough (continued)

Ercol furniture factory

Development site owned by the SE

Regional Development

Agency


Hughenden Manor

Former home of famous UK Prime Minister – DisraeliNow owned by the National Trust, open for public visits and their regional headquarters


Hughenden ManorPotential for self supply

HughendenManor

WoodfuelProduction

site


Hughenden Manor

Boiler to be installed in former apple store


Hughenden Manor – outcome:

• Boiler house converted from old apple store.• New Chip bunker built alongside boiler house in local vernacular.

Specification220kW Froling boiler supplied and installed by Econergy.Fuel – G50 W3045m3 fuel store – top loaded4000l buffer tank75mm diameter flow and return district heating pipes to mansion house (holding 1500l)Alfa Laval plate heat exchangerKieback & Peter / Syxthsense BMS control system


Hughenden Manor – outcome:

Woodchip supply:• Chip bunker designed to take advantage of the landform• Delivery via tipper trailer or lorry with easy access from car park• Easy open doors to chip bunker• Delivery bunker protected by grill• Bunker designed so that chips are dropped in the centre of the store allowing up to 80% of the 45m3 capacity to be used easily• Chips supplied from a converted barn on Small Dean farm on the estate.• Chips currently ‘bought in’ but harvesting, seasoning and chipping programme is proceeding to allow estate to supply its’ own fuel needs


Hughenden Manor – supply chain:


Hall Barn Estate


Hall Barn Estate


Hall Barn Estate


Full sustainability?Mureck - Austria


Woodwise’s tractor based harvester in Sussex, England

Finnish technology introduced to England:(Valtra tractor, Botex 8m boom and Keto harvester head.) Versatile and well suited to small woods with high

environmental sensitivity

Compact harvester head with tracked rollers well suited

broadleaf and even coppice


Woodheat for the community Straden, Austria

Local farmers sell woodheat to the villagers of Straden:• Boiler house is built into the hillside• Chip store takes advantage of the landform to allow easy delivery by tipping trailer;• Large accumulator tank to optimise boiler efficiency; and• Solar thermal panels provide heat in summer


Woodheat for SchoolsSt Margarethen, Austria

Local farmers sell woodheat to local primary & secondary schools:

• Rent basement rooms and install:

• Fuel bunker, and

• Two woodfuel boilers (providing flexibility to address varied load while maintaining optimal boiler efficiency)

Note: Farmers are not planning further

developments as this system uses all the wood they produce

from their own woods, if they had to buy

woodfuel on the open market the business model would be less

attractive

Access to chip bunker

Agitator arms to push woodchips

to auger feed for boilers


High technology woodchipping from Komptech, Austria

Mobile high capacity woodchipping from Komptech

System has both shute and elevator delivery of woodchips. Elevator is more energy efficient, quieter and could be fitted to a woodchip delivery vehicle to allow easy delivery to above ground chip stores


And for that oversized log!

• If there is the odd large log which is no use as timber• It can be made smaller to fit the chipper!


Biomass Trade CentreWaldstein, Austria

The concept of the ‘Biomass Trade Centre’ is an effective way to store, dry and retail a range of woodfuel types

Here wood is seasoned over a summer reducing moisture content from 50% to about 30% (by overall weight) in the open air and chipped (as illustrated in previous slides) by a contract chipper.

Ventilating fan Ventilated floor of chip store

If a lower moisture content is needed then ambient air can be blown through the woodchip store via a vented floor


Biomass Trade CentreHartberg, Austria

Firewood is cut and seasoned in ‘metal cages’. Buyers pay on basis of energy value assessed by

weight and moisture content (buyers select three logs from cage and these are tested

using a moisture meter)


Biomass Trade CentreWoodchip delivery

Ideally woodchips will be delivered using a ‘tipping trailer’ (as this keeps costs down). However, for those sites where access to the chip bunker is restricted woodchips can be delivered pnuematically. But this is noisy, time consuming and costly – so void if you can!


A typical opportunity?Forestry Commission, Bedgebury, England


Thank youwww.woodheatsolutions.eu

Documents

Case Studies - March 2011 1 Englefield House