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Mitsubishi Electric
Mitsubishi Electric Case Studies
Landmark Restoration Benefits from Combined
VRF
Fort Dunlop, Birmingham’s iconic listed
building, visible to the thousands of commuters as they journey
along the M6, has been transformed into modern offices and
contemporary retail space; all of which will be benefiting from
the latest heating and cooling technology from Mitsubishi
Electric.
The landmark building, historically the
location of the construction of spitfire planes during World War
2, was transformed by award winning property developer, Urban
Splash, who had the challenge of bringing the building up to
modern standards of comfort and technology without compromising
the existing features and unique architecture.
The specification included over 120
Mitsubishi Electric water cooled WR2 systems making it the
largest in the UK. The WR2 units meet the heating and cooling
demands of the building utilising multi port BC controllers
which enable the building to benefit from heat recovery, using
waste energy generated from one part of the building during
cooling, to be used to heat another area.
To keep the internal air fresh without
wasting energy, the project also includes over 120 Lossnay heat
recovery units, which recoup energy from outgoing air to heat or
cool incoming fresh air.
The WR2 condensing units are ‘housed’ in
internal plant rooms, of which there are four per floor,
providing heating and cooling to each floor via a total of over
700 Mitsubishi Electric ducted fan coils.
To preserve the integrity of the original
architecture, the internal floor was raised and the void below
used as a pathway for concealing all of the air conditioning
system’s distribution, electrical power and control cables. The
combination ensures the highest total building efficiencies, as
well as lower running costs and excellent CO2 emissions
reductions.
Lossnay ventilation units working in
conjunction with the water cooled systems provide effective
ventilation and total heat recovery, ensuring a comfortable air
temperature within each room.
With large numbers of air conditioning units,
control is paramount in a building of this complexity and size
and 24 Mitsubishi Electric G50A centralised controllers were
installed per floor in addition to 180 wired remote zone
controllers.
This allows Urban Splash and their tenants to
closely monitor and control each individual unit within the
system to match separate room requirements.
With the installation of what is the
country’s largest installation of WR2 systems, Fort Dunlop has
been converted into a building fit for modern use whilst
ensuring that this prestigious building remains a central part
of Birmingham’s heritage for years to come.
Hot Water & Cool Chefs in Hatfield Kitchen
Mitsubishi Electric has installed a VRF,
water heating booster unit at its head office in Hatfield to
provide a hot water supply to the building’s kitchen.
The office has an on-site restaurant that can
seat 100 people and serves cooked meals 5 days a week. Employees
and guests are offered breakfast every morning from 8am –
10:30am and lunch every afternoon from 12pm – 2pm. The kitchen
therefore requires an almost constant hot water supply for a
large portion of the working day.
The 12.5kW water heating unit is connected to
a high efficiency VRF outdoor unit that provides cooling to the
kitchen area via two ducted fan coils. The PWFY unit is able to
utilise the heat energy recovered from this area to heat water
in a highly efficient manner, providing the kitchen with a hot
water supply.
An M2M IP/50 Maxi unit has been installed as
a means of controlling and monitoring the system, allowing the
tracking and logging of data such as the exact amount of water
utilised by the kitchen on a daily basis, power consumption of
the outdoor unit, power supplied to the PWFY unit and ambient
temperatures among other variables.
The M2M unit also provides a perfect solution
for system down time. If in the unlikely event there is an error
at the PWFY unit, a signal would be sent to the M2M which would
in turn give an error output signal. This would then switch on a
back up immersion heater making sure that the kitchen’s hot
water demand is satisfied at all times.
Monitoring of the system over a four month
period showed an average COP of 5.36 reflecting a highly
efficient system.
The PWFY air to water heating booster unit is
able to satisfy the hot water demand required from the kitchen
on a daily basis in a highly efficient manner, especially when
benefiting from heat recovery. This in turn has shown an overall
reduction in running costs and CO2 emissions enhancing
Mitsubishi Electric’s positive attitude to global warming.
Hotel Achieves Massive Cut in Air
Conditioning Energy Costs
A six-month trial has demonstrated that
Mitsubishi Electric’s specialist Melcotel™ controller has
delivered a 40% energy reduction for the air conditioning at
Premier Inn’s new city centre site in Leicester.
The hotel’s 135 bedrooms used an average
consumption of 17.20kWh a day throughout the 19 storey building.
Now, with the Melcotel controller in place, the system is
consuming just 7-8kWh of energy per day, – an average 40%
reduction in energy consumption for the whole system.
The Melcotel controller works with both key card and non-key
card systems to ensure that air conditioning is not working
needlessly when rooms are empty or if guests decide to open a
window without switching off the heating or cooling.
Specifically designed for the mass-market
hotel sector, the controller is an evolution in Mitsubishi
Electric’s PLC (Programmable Logic Controller) and can be
retrofitted as well as being ideal for new builds.
At the start of the trial, the air
conditioning was set to turn off automatically at 1am, but this
still allowed guests to override the system.
Mitsubishi Electric then introduced a G50 controller which meant
that the air conditioning could be programmed to automatically
shut off five times a day at 9am, 11am, 1pm, 4pm, and 8pm, when
there was a distinct possibility of the rooms being empty and
the potential for energy to be wasted.
This led to some reduction in energy use, but
now with Melcotel, the system automatically responds to the
requirements of each individual room, resetting the air
conditioning to a predetermined setting and constantly
monitoring the temperatures of any unoccupied rooms.
The air conditioning in these empty rooms
will only come on to keep the temperature within a set range,
which has the double advantage of conserving energy whilst
ensuring that the room reaches the desired temperature quicker
when a guest enters the room.
Temperatures are recorded by a sensor within
the controller and windows can also be connected to the system
so that when they are opened, the air conditioning switches off
to conserve energy.
Melcotel works with Mitsubishi Electric’s
advanced City Multi systems and one unit is able to control up
to 250 indoor units. Wireless technology allows the Melcotel to
be accessed remotely when used in conjunction with a Mini M2M
offering further control and monitoring facilities to hoteliers.
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Mitsubishi Electric Case Studies 2 |
