ENERGY SAVING THANKS TO GEOTHERMAL ENERGY AND SOLAR POWER
13 - 03 - 07
IKEA & SHOPPING CENTRE: 1,320 TONNES LESS CO2 PER YEAR
Hofheim-Wallau, 7th March 2013
Roof greening, solar energy, geothermal energy and the best possible protection for birds and bats: IKEA has come up with many ideas in Lübeck to respect the environment in the best possible way. It’s clear that heating and air conditioning an entire IKEA furniture store and a shopping centre of about the same size is a costly matter and about comparable with the energy demand for 240 4-person households. But to do this in a way as energy-saving and environmentally friendly as possible, IKEA is relying on alternative energies and innovative concepts, saving 1,320 tonnes of CO2
per year. This is about the environmental impact of a medium-sized car, which has travelled 265 times around the world.
IKEA will use geothermal energy to heat and air condition the building, as is already the case in Würzburg. Here in Lübeck, special geothermic probes are being sunk into the ground - to a depth of 150 metres. There are 161 probes for the IKEA furniture store and 44 for the shopping centre.
In the winter, special heat pumps will remove heat from the ground using these probes and use it to heat the furniture store. And in the summer, the heat from the furniture store and shopping centre will be fed into the ground via heat pumps and probes in order to air condition the buildings.
Using this special technique of removing or conveying heat into the ground, up to 90 percent of the furniture store’s heat in the winter and 100% of the air conditioning in the summer can be provided. A condensing boiler supports this process in the winter. The shopping centre can cover about 20 percent of its annual energy requirement for heating and air conditioning through geothermal energy, supported by condensing boilers and classic cooling units. “The lower values are partly down to the different user behaviour of the tenants,” says Rainer Bastians, managing director of Inter IKEA Centre Deutschland, “as well as the lower number of probes.” The overall effect of this geothermal technology on the environment: 870 tonnes less CO2
Photovoltaic plants save 450 tonnes of CO2 per year
Photovoltaic plant at IKEA Berlin-Lichtenberg
Photovoltaic modules will be installed on the rooftops of the buildings on an area of about 10,000 m² (IKEA) and 2,650 m2
(shopping centre). Solar cells convert solar energy into electrical energy, creating large volumes of electricity, i.e. about 550,000 kilowatt hours each year. This is the equivalent of 120 four-person households. The effect on the environment: 450 tonnes less of CO2
Furniture store floors with built-in water circulation
Underfloor heating in IKEA Berlin-Lichtenberg
Underfloor heating is also installed in the furniture store over an area of 21,000 m2
(the equivalent of three football pitches). In combination with the ceiling-mounted radiant panels, they provide pleasant air conditioning in the summer and comforting heat in the winter.
Ultra-efficient ventilation systems in both the furniture store and shopping centre guarantee that the used air is exchanged for fresh filtered air. State-of-the-art heat and cooling recovery systems extract energy from the building’s exhaust air, which would otherwise be discharged unused into the open air. This energy is used to heat the inlet air in the winter and cool it down in the summer.
During the hot months, an adiabatic spray humidification is also used in the exhaust air to increase the effect of the heat recovery by up to 80 percent. Air quality sensors “monitor” the necessary air volumes in the furniture store and shopping centre so that there is always enough fresh air available, while also saving energy.
LED lights in the sales areas provide energy-saving lighting, together with ultra-efficient fluorescent tubes (known as T5 tubes) with daylight-dependent control. Movement sensors and presence detectors ensure usage-dependant control of the lighting. LED lights are also used in parts of the car park.
Only energy-saving appliances are used in the IKEA kitchens, including dishwashers with integrated heat pumps for heat recovery.
Thermal solar plant provides hot water
In the summer and transitional times of the year, solar plants with a collector area of 50 m² (furniture store) and 25 m² (shopping centre) provide the energy to heat the hot water. In the winter months and when the weather is cloudy, there is the option of raising the temperature of the hot water with an additional gas condensing boiler.
To save drinking water, the sanitary facilities in the furniture store and shopping centre are operated using well water.
Conservation house for bats, swallows and more
IKEA in Lübeck also operates a unique species conservation system to protect swallows and bats. Thanks to the help of two biologists, supported by the lower nature conservation authority, we have been able to develop a new concept for a conservation house for bats, swallows and other types of birds in Lübeck. “This is unique and has never been constructed,” says project manager Nicole Erdmann. “We have learned a lot here. With the help of the species conservation house, we will provide temporary accommodation as well as supporting research into the species.”
Aside from winter and summer accommodation as well as breeding sites for bats, there will also be breeding sites for coastal birds on the green roof of the future furniture store.
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