30 May 2005
Within the framework of the IEA, the Heat Pump Programme has carried out three Annexes on
ground source heat pumps (GSHP), the IEA Energy Conservation through Energy Storage
Implementing Agreement one, and both Programmes came to the result that utilising the ground highly
efficient solutions for the building sector can be achieved. The work in Annex 29 will include a matrix
of GSHP applications depending on climate, ground conditions and applications, a study on how to
improve technical performance and cost of GSHP, the identification of market barriers and innovative
approaches to increase GSHP.
Ground-coupled heat pumps gain importance world-wide with respect to energy efficiency in
heating and cooling operation. The ground acting as a store offers the possibility of damping the
effects of the outside air temperature fluctuations, in colder climates it enables monovalent heating
operation of the heat pump, and for utilities it is – compared with outside air operated heat pumps – a
tool for demand side management measures.