02 July 2009

Energy Efficiency: VRF vs. GSHP Systems

With the current movement toward more energy effi cient buildings, many technologies are promoted with emphasis on their superior energy effi ciency. The variable refrigerant flow (VRF) and ground source heat pump (GSHP) systems are probably the most competitive technologies among these. However, there is few, if any, published literature comparing the energy effi ciency between VRF and GSHP systems. This article presents preliminary results of a simulation-based investigation on the energy effi ciencies of VRF and GSHP systems. The results show that, for conditioning a small offi ce building, GSHP system can save up to 36% electricity compared with VRF system.