Hybrid gas engine heat pump (HPGHP) combines hybrid-power technology with heat pump technology to increase the fuel efficiency of the system. Based on a hybrid gas engine heat pump platform

this paper performed experiments under the winter heating condition to analyze operating economy of the system. The outdoor dry bulb temperature was 7℃

the evaporating and condensing temperature was -5℃ and 46℃

respectively. The optimization curve control strategy was adopted to control the engine operating in the economical zone and distribute requiring power between the engine and battery. The fuel consumption flow

fuel consumption rate

fuel conversion rate and recovered wasted heat were indicators of economic research. The system performance was tested under low

medium and high load separately and compared with conventional gas heat pump (GHP). Analysis results show that under low load

the average fuel conversion efficiency of hybrid gas heat pump is about 0.195

16.7% higher than that of GHP. In high load range

average fuel conversion efficiency of hybrid gas heat pump is about 0.151

12.1% higher than that of GHP under the same load.