02 July 2009
A number of design control improvements of large commercial and institutional ground source heat pump (GSHP) systems have been implemented in Canada during the last 20 years. The majority of these improvements aimed at reducing the energy consumption of the geothermal fluid pumps and at optimizing the integration of various functions as solar energy recovery, thermal storage, direct geothermal heating and cooling with radiant floors and exhaust air heat reclaim. Such improvements generally reduce the system energy consumption and overall efficiency, but their initial costs and technical feasibility have to be established for each particular application. Other improvements are still possible and necessary today to overcome technical barriers and increase the market accessibility of GSHP systems.