Air Conditioning Product
of the Year
WINNER: Mitsubishi Electric PWFY commercial water heater
THE PWFY commercial water but the tests were also carried hot water and is far
heater – winner of the Air out using the more readily more fuel-efficient
Conditioning Product of the available air source heat pump than other systems of
Year – removes the need for a system. This also beat water heating.
building to have a commercial traditional methods and Linking a PWFY
boiler by taking excess heat linking the PWFY to this more heat pump water
from a VRF air conditioning readily available VRF system heater to an outdoor
system to provide a constant can offer huge potential thermostat means it
supply of hot water. The unit savings. can be made to work
has an average efficiency level A PWFY HWS-BU unit has either once the
of over 400% compared to a two plate-heat-exchangers to ambient outdoor
modern commercial boiler offer a maximum/minimum temperature rises
with efficiency levels of 80- water flow rate of 0.6 – above 15°C or during
90%. 2.15m
3
/h. COPs will average 5 the night, using off-
Owners can dramatically although this will be peak electricity and
reduce both their fuel bills dependent on the loading of the partial load
and their carbon emissions, heating/cooling/hot water. efficiencies of a
whilst still achieving water The heat pump boiler uses modern VRF system.
temperatures of 70ºC. the vapour compression cycle The PWFY is an
After year-long tests at of the air conditioning system additional cost to an
Mitsubishi Electric’s Hatfield to raise the water temperature. ac project of around
site, the company’s research Instead of simply £3,000. It also requires
engineers demonstrated that a discharging any excess heat slightly more material
properly commissioned, fully from the refrigerant to the air (eg piping) and
maintained and accurately as in a conventional split type installation costs.
controlled VRF heat pump air air conditioner, the hot gas Below that temperature, any the system will not divert heat
conditioning system is 515% pipe in the PWFY runs system will have more of a recovery to heat water and will
more efficient at heating than through the water piping in a heating requirement and any use the water heated during
a boiler and 338% more unique tube-in-tube coaxial heat recovery in the system will the night when there is little
efficient at heating and system that extracts the heat need to be utilised to ensure requirement from the ac
cooling than a typical from the refrigerant cycle and that the ac system is operating system. This still gives a COP
chiller/boiler combination. transfers it directly to the as efficiently as possible. of 3.
The tests involved a ground- water. In winter, when it is unlikely Mitsubishi Electric
source heat pump VRF system, This effectively provides free to get much above 15°C each, 01707 282880
FINALISTS
Airedale International Air Conditioning traditional large single fan. This Daikin Europe
Turbochill chiller approach provides greater design VRVlll
flexibility, reduced maintenance costs
AN AIR-COOLED, high capacity chiller and significant energy savings. DAIKIN’S VRVIII
designed around the revolutionary oil- Eaton-Williams heat recovery
less centrifugal Turbocor compressor. 01732 866055 system is a single
The Turbochill minimises environmental refrigerant
impact by lifting efficiency to new ClimaCheck Sweden AB circuit product
heights and pushing down sound levels. ClimaCheck Performance Analyser that provides
Capacities range from 500-1100kW and simultaneous
seasonal efficiencies of up to 5.7 are THE ClimaCheck Performance Analyser, heating and
achieveable. available in the UK through Business cooling from a
Airedale Edge, can determine how well a system is single system at
0113 239 1000 operating. It accurately provides COP; one time. The
cooling and heating capacity; power input system includes a wide range of outdoor
Eaton-Williams and compressor isentropic efficiency units from 8hp to 48hp, with capacities
Fan Wall information. ClimaCheck is a non-invasive ranging from 25.0kW up to 150kW in
technology, using five sensors attached at heating mode. The new VRVIII HR can
THE FanWall concept offers a new strategic points on the system. connect up to 64 units in a single system.
approach to air handler design, using an Business Edge Daikin Europe
array of smaller fans to replace the 023 9223 0007 www.daikineurope.com
Category sponsored by Hawco Refrigeration
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