22 May 2008
Ground-source heat pump (GSHP) systems represent an energy efficient
technology for heating and cooling of non-residential buildings due to the relatively high and
stable heat source temperature and the fact that a considerable share of the cooling demand
can be covered by means of so-called “free cooling”. Installation of high quality GSHP
systems therefore complies with the main goals of the new EU Directive on The Energy
Performance of Buildings (Directive 2002/91/EC), i.e. reduction of the total primary energy
demand and the associated CO2 emissions in buildings.
The paper discusses the main characteristics of GSHP systems for heating and cooling of
non-residential buildings in Norway including operational experiences. Several high-quality
GSHP systems are presented, including installations in office buildings and a hospital. The
latter GSHP system is connected to one of the largest underground thermal energy storages
in Europe comprising as many as 350 boreholes in crystalline rock.