Improving heat pump performance via compressor capacity control - Analysis and test, volume 1

Past, present, and future developments in heat pump technology are outlined. One method of improvement, the capacity controlled heat pump, was studied in detail. An analysis of conventional and capacity controlled air-to-air heat pumps was performed using detailed computer simulations. New system sizing guidelines are outlined for capacity controlled units, resulting in as much as a 30% per year energy savings over conventional heat pumps in two of the six locations studied.