New geothermal energy solution frees up resources for healthcare at Norrland’s University Hospital, Umeå. A new heating and cooling centre, including ground storage for energy, is one of the solutions behind the hospital’s energy savings.
“It‘s not only an effort to reduce the hospital’s energy costs, but also an investment in the environment” – Hans Johansson, Property Area Manager at NUS.
The County Council Executive Committee invested in Energy Machines in 2014 to safeguard the future energy supply at NUS. Their focus on geothermal and renewable energy was a step toward sustainable development for the future. Last winter, Energy Machines designed and installed an integrated heating and cooling system along with a large borehole energy storage area. Today, our geothermal energy solution covers just over 20% of the total heat requirement, and 95% of cooling.
“By producing heating and cooling internally we put waste heat to good use and reduced the need for purchased energy. This is a really good deal for the County Council, and we can quickly recoup the investment cost and start saving money.”- Hans Johansson, Property Area Manager at NUS.
Transforms surplus heat into energy
Thanks to ground storage, which takes heat from bedrock in the winter and provides cooling in the summer, the County Council has a supply of cheap energy. It’s now possible to keep many spaces such as operating theatres, the blood bank and laboratory centre that depend on cool indoor temperatures, cool. And Energy Machines take surplus heat from one part of the hospital and uses it to heat others.
“We put the constant cycle of energy extracted from the ground and water to good use. What’s more, we can save surplus heat during warm summer months and use it in the winter instead,” Hans tells us.
Self-sufficient in heating and cooling
The ground storage comprises 125 boreholes 200 metres deep beneath the large car park at the County Council building.
“It’s one of the world’s 30 biggest installations, supplying some 5,000 MWh of cooling and 7,000 MWh of heating – enough to heat around 450 houses”- Hans Johansson, Property Area Manager, NUS.
These figures mean Norrland’s University Hospital has now doubled its capacity to produce cooling. There are plans to invest in more cooling and heating installations.
Energy by numbers
– SEK 40 million investment, including modifications and maintenance of existing installations
– Savings = SEK 12,000 / day in energy costs, i.e. approximately SEK 4.4 million / year
– Investment repayment time, 9 years
– Total hospital floor space = 345,000 sq m
– 95% of the cooling requirement, equivalent to 327,000 sq m, covered by the new solution
– 22% heating and hot water needs, about 70,000 sq m, covered by the new solution
– Capacity available to provide a further 20,000 sq m with heating and hot water