Monodraught Windcatchers make a significant contribution to reducing energy consumption in a new Tesco Superstore near Manchester.
Tesco, the UK's leading supermarket chain set itself a target to reduce by 50% the carbon emissions from all its stores by 2020 as compared to a baseline of 2006.
The new Tesco store front near Manchester
Remarkably they exceeded this ambitious target when they opened their first major new Eco store at Cheetham Hill, Manchester, reducing the carbon footprint by 70% compared to an equivalent sized store built just over two years ago.
These measures are delivering significant savings for the company with a 48% reduction of the store's fuel bill based on 2006 baselines.
An ITN film production featuring the Monodraught Windcatcher natural ventilation systems installed at Cheetham Hill was a major attraction at this year's NEMEX exhibition.
Bill Moss, Tesco's Community Champion at the new Cheetham Eco Store said on the film, "The environmental impact of the store is absolutely amazing".
"There's a real nice feel about the whole store ...".
"the fresh air that comes in makes for a better working environment".
"All the staff and customers like it, it's not like working in a normal supermarket." Highlighting Monodraught's innovative approach, the Tesco billboard in the store announces: 'Our roof vents let air flow naturally, so we use less energy to heat and cool the store'.
This is quite a compliment to the innovative advantages of the Monodraught Windcatcher system.
The 52,000 sq ft Cheetham Hill store, located in a redevelopment area near Manchester, is built to an Environmental Format that will provide a "low carbon blueprint" for future Tesco stores built in the UK.
Steve Howard, chief executive of The Climate Group - an NGO that has worked with Tesco on its low carbon strategy - urged other companies to use the Cheetham Hill store as a template for future low carbon buildings".
"This new blueprint store design is an example that we hope other businesses will follow," he says.
Echoing this sentiment, Dean Hyndman a Senior Electrical Engineer with the project's consulting engineers Scott Wilson, says: "We were asked to examine environmental issues in order to reduce the carbon footprint for the Cheetham Hill store and all other Tesco stores in the future".
"One of the key energy saving initiatives was to reduce the air conditioning load by providing natural ventilation where practically possible." He estimates that the energy savings achieved by replacing air conditioning with Monodraught Windcatchers will be in the region of 20%.
Scott Wilson is a multi-disciplinary international design and engineering consultancy, which employs some 6,500 employees worldwide and provides sustainable, integrated solutions to meet the environmental needs of clients.
The Consultancy has previous experience working with Monodraught and was particularly keen to use bespoke Windcatchers to give the new Environmental Format stores a more individual and innovative identity.
Dean Hyndman says the Monodraught design team was very enthusiastic, producing a distinctive design and making it practical for the Tesco installation.
The eleven, 4-metres high, oval shaped Windcatchers installed at Cheetham Hill are certainly distinctive, and are finished in the eye-catching blue and grey Tesco livery.
Windcatchers, together with Monodraught SunPipes and Suncatchers, have also been installed at the new Tesco Express store in Hinckley, Leicestershire, which opened in June 2008 and is also based on their eco-store concept and is being used to create the Environmental Format for new smaller stores.
The design of Monodraught Windcatchers is based on an innovative technology that is making a positive contribution to the elimination of air conditioning, which in turn reduces the carbon emissions produced by burning fossil fuels.
Windcatchers are also widely recognised as the most effective means of harnessing the wind's potential as a renewable energy source.
Roof mounted and designed to operate with virtually no moving parts, they use established atmospheric principles and the natural effects of the wind to bring fresh air into a building and extract stale warm air, using only natural forces.
Warm air rising to roof level decreases the air pressure within buildings, allowing cooler air to enter the building via the Windcatcher units.
The resultant change in air pressure produces sufficient airflow to make the space comfortably fresh.
Wind blowing onto the windward side of a ventilation stack increases the through-put of air and encourages stale and stagnant air to be extracted through the leeward side of the roof unit.
Opposed blade dampers - made from recycled plastic, with their ventilation rate controlled by the building's BMS system - can precisely control airflow through the system dependent on the internal temperature.
At night they can also be programmed to open fully, providing a downwash of cool air that purges the building, leaving the interior feeling fresh and clean for the following morning.
Monodraught Windcatcher units can be controlled individually or by a central control panel, which can be fitted with a spring/summer/autumn/winter switch to ensure that dampers open for night time cooling only during summer months.
At other times of the year dampers can be set to provide trickle ventilation without the problems of cold draughts.
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