Community Research and Development Information Service - CORDIS


The report concerns the duty-cycling of heatpumps. Having developed a method to measure dynamic efficiency, a simple model for heatpump performance when duty-cycling is described, which takes into consideration the effect of start currents. The possible applications of duty-cycling are considered, together with related technical problems. It is concluded that it is possible to improve the coefficient of performance of a heatpump with duty-cycling by a factor of 20-30%. The heatpump is only suitable for duty-cycling if the compressor has low start losses and the refrigerant circuit has a suitably large timeconstant of above 30 sec.

Additional information

Authors: FORDSMAND M, Charlottenlund (DK)
Bibliographic Reference: EUR 12591 EN (1990) 24 pp., MF, ECU 4, blow-up copy ECU 5
Availability: (2)
Record Number: 199010453 / Last updated on: 1994-12-01
Original language: en
Available languages: en