Manormead
Nursing Home in Hindhead, Surrey is owned by The
Church of England Pensions Board with the original
building dating back to the 1920’s.
In the autumn of 2007 a new purpose built extension
was opened. The builders of this extension, in
line with a request by the Pensions Board, were
eager to deploy some form of renewable energy
on site.
Many renewable technologies were considered,
however biomass heating was seen as offering the
most cost effective and practical solution. Asgard
Biomass was asked to provide detailed proposals
for a suitable biomass heating system.
A variety of potential fuel types for the biomass
boiler were explored, and it was decided that
the preferred fuel would be wood pellets.
The builders design objective for the building
was that a minimum of 10% of its energy consumption
was from a renewable source. It was therefore
decided that a 50kW biomass boiler would act as
the lead boiler with back up from three 60kW gas
condensing boilers.
From calculations made by the M&E engineers
involved in the project this approach would mean
that a minimum of 75% of all heating in the building
would be from the biomass boiler. This would allow
the 10% criteria to be easily exceeded.
This unit is designed to operate with an externally
located fuel hopper or silo and features a fire
damper, filling indicator and flexible screw control.
As installed the boiler is located in the plant
room with the other boilers. A pellet store was
constructed adjacent to this room and was fitted
out, by Asgard Biomass, with full length sloping
floors and flexible screw. This screw discharges
through the joining wall into an uplift auger
which deposits the fuel into the back end of the
boiler.
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