Category: Technical information associated with Mitsubishi Electric
Case Studies 1
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Mitsubishi Electric
Case Studies 1
WR2 helps Logistics Centre realise green ambitions
A pioneering British company has been showing just how sustainable
buildings can be with its new International Logistics Centre in Southend.
Olympus KeyMed’s 3,400m² centre is unique for its type in the UK because
it combines high finish levels with a sustainable approach that uses a
combination of green systems for significantly better energy efficiency
than an equivalent conventional facility.
At the heart of the eco-friendly, energy-efficient system is a vertical
closed loop bore hole system (with 50 bore holes sinking 98m into the
ground strata) linked to Mitsubishi Electric’s unique WR2 ground source
heat pump which allows the building to use the geothermal energy of the
earth as a heating or cooling energy store.
Ground source water systems are one of the recognised renewable energy
sources listed as part of the Government’s push for 10% renewable energy
usage, and Mitsubishi Electric’s WR2 and WY City Multi condensers are
the only air conditioning products currently on the list.
The inverter-driven WR2 units use the geothermal energy from the earth
to either cool or heat their refrigerant circuit, reducing the energy
needed to keep the building at the right temperature. WR2 systems also
transfer heat between any of the 24 indoor units available on each
circuit to offer double heat recovery potential and COPs of up to 7.0.
In addition to the WR2 ground source heat pump system, the roof of the
logistics centre is covered with solar panel water heating which will
provide an average of up to 50% of the domestic hot water all year.
The low energy, highly insulated building also collects rain water from
the roof for flushing the toilets and elsewhere.
By combining the most environmentally friendly systems suitable for this
locality and looking at all aspects of the building’s services, Olympus
KeyMed has created a building that will consume at least 30% less energy
and 25% less water compared to that of an equivalent ‘traditional’
building, whilst delivering a high quality internal working environment
for staff
Mitsubishi Electric gets fresh with its own Headquarters
Mitsubishi Electric has completely refurbished its Hatfield
headquarters installing a range of
systems as a test bed for its advanced technology.
This includes the revolutionary ‘Mixed Mode’ system fitted in a ground
floor, 500m² open-plan office. The unique system, developed in
conjunction with industry expert, Passivent, combines the best of
natural ventilation with totally flexible air conditioning to offer
environmental control that uses fresh air as much as possible and
switches on the air conditioning only when necessary.
Heat recovery air-conditioning provides up to 67kW cooling when the
ambient temperature of the office rises above 21°C in addition to
delivering up to 72kW of heating in the colder months of the year.
“The Passivent system gives us free cooling when ambient conditions
allow and both the air conditioning and the natural ventilation are
controlled by a Mitsubishi Electric PLC (programmable logic controller)
that allows us to ensure that the whole system uses as little energy as
possible,” explained Philip Ord, VRF product manager.
The new Part L2 of the Building Regulations demands cuts in the energy
used by buildings at the same time as placing a requirement that
buildings do not overheat, so the Mixed Mode system answers both of
these criteria, by using natural ventilation as much as possible and
switching to the air conditioning only when the Passivent system cannot
cope alone.
The natural ventilation system took only a couple of days to install and
uses the ceiling voids as a natural plenum to deliver air to grilles in
the ceiling. On the outside of the building, six units of the glazing
have been modified to incorporate the external Passivent vents.
These are opened and closed automatically according to carbon-dioxide
concentration, indoor and outdoor temperatures, and rain and wind.
Overall energy consumption is reduced because fresh air is supplied to
the indoor environment via the natural ventilation system without the
need for mechanical power consumption and this provides the building
with free cooling from outdoors when required. The overall effect for
the occupant is a vastly improved air quality and comfort level, with
minimum energy consumption.
Technical information associated with: Mitsubishi Electric - VRF Air Conditioning, City Multi Super
Y R2 WR2 Series
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Logistics Centre, Southend
Mitsubishi HQ
Mitsubishi HQ
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Mitsubishi Electric Europe
Air Conditioning Systems Division
Travellers Lane
Hatfield
Herts
AL10 8XB
Tel (General) : 01707 282880
Tel (Sales) : 01707 282800
Fax : 01707 278674
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