The photo shows the Wellman Robey boilers in a row.

Combined Heat and Power:
The installation at Leamington House is an Enviropower CHP plant comprising a spark-ignition 2000cc Perkins 2006 SI gas-engine with a low voltage 3-phase generator. Useful heat recovery is obtained from jacket cooling, oil cooling and exhaust gases to supply the low temperature hot water circuit.

Fuel Burn Rate 365KW
Design heat pickup 185KW
Net electrical output 108KW

The CHP plant operates during the day period (17 hours) when the value of electricity is the highest.

The CHP plant is interfaced with the BEMS and generates electricity for use by the landlord supply (boiler house, communal areas and lifts),
with excess electricity sold back to the national grid.
 

Supplier of technology:

CHP engine:
Enviropower
Unit 6B
Lodge Way
Caldicot
Gwent
NP26 5PS
Phone: +44-1291421411
www.enviropower.org.uk

The photo shows the pressurisation unit and safety valve, used to maintain a minimum water pressure on the district heating circuit. It is controlled by the BEMS system.

District Heating System:
The original heating systems for Leamington and Solihull Houses were fed from a centralised boiler plant, via a small-scale district heating system.

The centralised boiler plant was located at the end of a two-storey car park between the blocks. The district heating pipe work divided within the boiler house and ran four heating circuits, two circuits to each block.

After entering the tower block the district heating split into 8 risers, which served one dwelling per floor.

The following major works were carried out as part of the new installation:

a) Existing boiler plant removed in entirety.

b) Four new boilers installed complete with ancillaries

• 2 Wellman Robey, Ygnette 600 kW

• 2 Wellman Robey, Ygnette 450 kW

c) New pressurisation set installed controlled by the building energy management system (BEMS).

Holden and Brooke Ltd
Reflexomat 2 pump 1 system
Motor power: 1.1 kW

d) Installation of 8 run and standby circulating pumps for heating circuits.

Holden and Brooke Ltd
52 –120 Varistar

e) New mechanical ventilation and flue arrangement for boilers and CHP engine.

f) All pipe work fully insulated and lagged.

g) New mains distribution pipe work installed to supply Leamington and Solihull Houses in specially made insulated ducts.

h) Extensive modernisation work in both flats and communal areas:

• New hydraulic board in each flat to control heat and hot water.

• New HWS cylinder and CWS tank.

• New thermostatic radiator valve and lock shield valve fitted to each radiator.

• Fully insulated riser pipe work boxed in to corridor areas.

Supplier of technology:

District heating gas boiler
Wellman Robey
Newfield Road
Oldbury
West Midlands
B69 3ET
Phone: +44-1215523311
www.wellmanrobey.com