Manormead Nursing Home

Background

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 will be 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.

Solution

A variety of potential fuel types for the biomass boiler were discussed with the client, however 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.

Installed Boiler Type and Wood Pellet Store

KSM Multistoker 575-50 Automatic

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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