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I N S TA L L AT I O N N E W S
Regeneration for A first for France
Fenland
More and more supermarkets in France not only offer modern
convenience and perfect service to their customers, they are
The biggest development project in the Fens for centuries is
environmentally-friendly as well. Thanks to Johnson Controls' ECONEO
harnessing advanced design and technology to breathe new life
integrated solution, these supermarkets reduce their energy
into a derelict area.
consumption and operating costs, which in turn brings benefits to its
The central feature of the £47m Nene Waterfront regeneration is
customers.
the Boathouse and its adjacent Business Space office building,
The Intermarché in Sens was the first supermarket to install ECONEO.
which take inspiration from the maritime location whilst aiming to
Owner Didier Poirot was persuaded by the sustainable approach of
fulfil best practice philosophy. As a result, sustainability has been
ECONEO right from the outset: ''We explicitly decided to use
at the forefront of the design, including incorporation into both
technologies that would protect the environment when building the
buildings of Passivent mixed mode ventilation.
supermarket. Our main objective was to keep energy consumption down
The Passivent system harnesses natural air movement principles
to a minimum. ECONEO integrates heating, ventilation, air-conditioning
of convection (whereby warm air rises) to effectively ventilate the
and refrigeration systems and runs the entire store’s lighting, enabling
buildings whilst giving a significant reduction in CO2 emissions,
us to achieve maximum energy efficiency. We hope to reduce energy consumption by 30%.''
and avoiding the use of ozone depleting substances. Advanced
Laurent Bonati, commercial director cold foods at Johnson Controls Centre, explains the benefits of ECONEO: ''The system's
control equipment monitors the building’s air quality and
components have proven both their efficiency and reliability in supermarkets. We adapt the ECONEO integrated solution to our customers'
temperature constantly; should temperatures rise beyond presets
needs and wishes. We're able to put forward and develop tailor-made solutions for large-scale installations.''
in exceptional circumstances (eg a spell of unusually hot or cold
The ECONEO integrated solution at the Intermarché in Sens comprises a negative cooling plant using CO2 as a natural refrigerant.
weather), the system triggers a Mitsubishi air conditioning system
Moreover, the heat produced by the refrigeration system is recovered in order to heat the store. The energy released by the system heats
to supplement the ventilation to restore ambient temperatures to
a 3,000 litre water tank, which supplies the heating system. In addition to providing an energy-efficient solution, the use of CO2 as a
comfortable levels.
refrigerant fluid is also highly environmentally-friendly. When CO2 is recovered, its direct impact on greenhouse gases is up to 3,800 times
Will Lockwood, of project architects Feilden+Mawson,
less than some conventional HFC-type fluids.”
elaborated: “The Boathouse project seeks to reflect best practice in
Comfort corridors ensure that it is not too cold between the food displays. The corridors raise the temperature between two refrigerated
energy conservation and BREEAM standards, including natural
areas by several degrees. Compressors fitted with variable speed drives also help improve the store's energy efficiency and extend the
ventilation, rainwater harvesting, high levels of natural daylight and
working-life of the equipment.
orientation of the buildings to control solar gain. It is hoped that
ECONEO also manages the building's lighting system. A timer makes sure lights are switched on to assist back-store areas before the
with the incorporation of Passivent louvres, air handling and
supermarket opens its doors. A floating high-pressure/low-pressure system (HP/LP) ensures the optimal use of the refrigeration plant,
conditioning energy will be greatly reduced while also providing the
thereby avoiding starting up the compressors unnecessarily.
building users the benefits of a healthy and pleasant working
With Johnson Controls MFOOD refrigeration system, temperature is continuously monitored and adjusted when necessary. MFOOD also
environment, offering an adaptive and flexible solution to ensuring
controls food safety at the supermarket.
air quality is maintained to a high standard in a manageable way.”
Performance monitoring is also possible with ECONEO. Johnson Controls regularly reviews the energy consumption, advises the
To achieve this, the focal point three-storey Boathouse which
customer accordingly and makes adjustments to fine-tune the plant.
provides a café, display space, yacht club, harbour offices and
conference space, includes a combination of 11 Passivent wall and
window Aircool units, drawing fresh air into the building, and
extracting warm, used air via the stairwell which dual-functions as
A clean bill of health
a stack or chimney to the Airstract roof terminal. The adjacent, two- Cannington Health Centre, Somerset, has installed an ecoTEC condensing boiler,
storey Business Space incorporates 30 Passivent wall Aircool units 300-litre twin unvented uniSTOR cylinder and auroTHERM VFK 990 flat plate solar
to again draw fresh air in at low level. The cooler external air panels. The total Vaillant heating and hot water solution was specified and installed
pushes the warm, internal air through acoustic transfer units to be by Westford Mechanical Ltd of Taunton, Somerset.
exhausted through high level wall Aircool ventilators. The GPs at Cannington decided that they would like to use environmentally
The entire system is fitted with modulating actuators which help friendly heating and hot water when they built an extension onto their surgery.
to effectively control the ventilation flow as dictated by the central Moira Allen is the practice manager, and she explained: “We looked at various forms
Passivent/Mitsubishi mixed mode controller, to ensure air quality of alternative energy, such as ground source heat pumps and wood chip boilers. In
and temperature is maintained 24/7, without draughts. the end, we decided that in terms of the costs and feasibility of the solutions, a solar
domestic hot water system was the most practical option at the moment.”
The health centre’s extension includes new consulting and treatment rooms,
each requiring hot water, in addition to the existing facilities. They were previously using oil-fired heating and have converted to gas. Moira
continued: “The panels and boiler are in the new extension; the heating is on; and it’s all working well. The installation was very
straightforward; we hardly noticed it with all the other building work going on. It’s been gratifying to realise we cannot hear the boiler
switching on to heat water, and to know the panels are doing their job. Because they’ve been installed in a new build, it will be hard to tell
precisely the savings we will make in the short to medium term, but we are trying to save energy as well as money.”
Westford Mechanical Ltd, which has over 20 years’ experience designing and installing heating, plumbing, air conditioning and ventilation
systems, carried out the installation. Ian Lee, technical manager at Westford Mechanical Ltd, said: “We are committed to high standards in
the work that we do and so we regularly specify and install Vaillant boilers. We get good service from them and a good response from
customers. We have sent our engineers on Vaillant’s solar DHW training course so that we understand every aspect of the product and its
capabilities, because much of our work is commercial and light industrial, where energy efficiency is often requested.”
The auroSTOR’s twin coil allows the water to be heated primarily from the solar panels while the second coil, connected to the boiler,
acts as a back up. This twin coil unvented solar cylinder manufactured from stainless steel has a 25 year warranty on the shell. Each cylinder
features two sensor pockets for simple straightforward connection of the control sensors and a 22kW rated coil for a rapid heat up.
Time is running out for R22
After 31st December 2009 it will be illegal to use virgin R22 refrigerant for the maintenance or
servicing of air conditioning. Mitsubishi Electric are hosting a series of informative seminars
which will help you understand the impact of this ban on both you and your customers.
To make the most of the business opportunities of_fered by the phase out of R22:
Email time2replace@meuk.mee.com or Call 01707 278601
Dates: June 4th, June 16th, July 1st and July 14th
Venue: Mitsubishi Electric, Travellers Lane
Hatfield, Hertfordshire AL10 8XB
www.mitsubishielectric.co.uk/aircon
Reader Reply No 12
14 BUILDING SERVICES & ENVIRONMENTAL ENGINEER JUNE 2009
VISIT OUR WEBSITE: www.bsee.co.uk
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