The entrance to the garage och energy central under house P.

In the ground next to the new construction, property owner Akademiska Hus has built a geoenergy plant, a so-called “ground storage” consisting of 130 boreholes, 230 metres deep. Summer heat and winter cold are stored in the rock around the boreholes. In the summer, cold is extracted from the boreholes to cool the buildings, and in winter, heat is retrieved to heat them. In the summer, excess heat from cooling machines at the Arrhenius Laboratory is also stored in the mountain in order to be used for heating in the winter.

The ground storage should be able to provide the entire Arrhenius Laboratory, which makes up a quarter of the University’s premises, with heating and cooling (on really cold winter days, however, supplementary district heating will be necessary). The energy extracted from the ground storage using heat pumps will replace just over 5,000 MWh of purchased heating every year, which corresponds to the heating needs of 250 villas. At the same time, the emissions of climate-affecting carbon dioxide will be reduced by about 350 tonnes a year.