Buildings Iconic
directly within the VRF circuit to parts of the system
Breath of
with a heating load, or indirectly through the combined
ground source system.
For ventilation, they used four Mitsubishi Electric
Lossnay Heat Recovery Units, strategically placed
around the attic to serve all areas of the building apart
from the kitchen. These recover about 80 per cent of the
heat from the exhaust air by transferring the heat back
into the fresh air supply.
fresh air
The entire ventilation and air conditioning system is
protected by high-quality washable filters to eliminate
waste, and is operated from one central controller
located in the plant room to prevent staff from adjusting
the setpoints and so pushing up energy consumption
unnecessarily.
The ground source water loops are fed through a is also discreet and in keeping with the stunning The Castle Course’s striking
manifold located under the practice driving range. This, surroundings.”
new clubhouse
in turn, feeds 10 boreholes that provide the cooling or A ground source water loop provides steady water
heating source as required. The ground source loop temperatures at around 6°C throughout the year and,
is filled with a water-and-glycol solution to protect the therefore, does not require defrost cycles. This allows the
system from freezing. heat pump system to work effectively at all times, using
The traditional method of heating this building very little energy compared with traditional systems.
would have been using gas boilers serving either Tests carried out by Mitsubishi at its UK headquarters in
radiators or underfloor pipework, or a combination of Hertfordshire showed that energy use could be around one
both, but Graeme Fox, managing director of Specialist quarter that of a traditional heating and cooling system.
Mechanical Services, believes this is a far more The installation was handed over last June. The
satisfactory solution. system had been running in various stages for about a
“The location and type of building makes it ideal for month prior to that date and tests were carried out by
ground source heating and cooling,” he says. “This is taking amperage readings, which showed an average
not the right approach for every building but, in this of less than 14 amps per phase for the entire cooling,
case, there was ample space around the building to heating and ventilation system – equivalent to less than
install the ground loops and boreholes. 10 watts per square metre.
“The result is an installation with a much smaller Fox says that monitoring equipment was about to
carbon footprint than a traditional system, which be installed to measure the performance over a longer >
www.cibsejournal.com February 2009 CIBSE Journal 53
CIBSEfeb09pp52-54 StAndrews•.indd 53 5/2/09 14:36:52
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