From six cold drilled holes, as deep as 100 metres, approx. 50,000 litres of ground water will be pumped up per hour, during the warm months. The water is led into a closed circuit where the cold energy is recovered and used in, for example, air-conditioning and scanners.

When the cold energy is recovered, the water automatically becomes a warmer temperature. It is warmed even further by a heat pump and funnelled back into the ground via six warm drilled holes. Here it is stored underground until the winter. It is then pumped back up during the cold months, and now the warm energy from the water is recovered and used in, for example, radiators.

This water is then pumped back into the ground, via the cold drilled holes, and this is how the hospital continues to recycle the warm and cold energy from the ground water. The facility can circulate up to 360,000 litres of water per hour. This alternative energy source will reduce the hospital’s CO2 emission by approx. 50 percent.

“The new hospital construction projects (in Denmark) have a unique opportunity to rethink solutions for hospital facility operation. With this tech-building and the ATES-facility, we can energy-optimise in an environmentally friendly way, and this is essential for a sustainable future,” says Project Director Lene Stevnhoved from New Hospital Bispebjerg, who did the countdown at the inauguration of the future green central supply facility at Bispebjerg.