Abstract
In this study, the performance characteristics of a gas engine-driven heat pump (GHP) system for heating applications were experimentally investigated. A novel energy-efficient air-source GHP experimental platform was designed based on scroll compressors with R410A. The changes in heating capacity (Q_h), gas consumption power (P_(gas)), compressor power (P_(comp)), primary energy ratio (PER), and coefficient of performance (COP) were obtained under varying conditions of condenser water flow rate G_w (6.10-15.25 m~3/h), water inlet temperature t_(w,in) (24.0-44.2℃), engine speed N_(eng) (1200-2400 r/min), and ambient air temperature T_(amb) (-15-7℃). The performances of the four heating modes (mode-1 to mode-4) were compared at an ambient air temperature of -20℃. The results showed that t_(w,in), N_(eng), and T_(amb) had significant influences on heating performance, whereas G_w had a slight impact. Compared with other heating modes, mode-4, wherein the recovered waste heat was only transferred to the heating water, could improve the heating performance of the GHP system. In the mode-4 heating experiments, PER was between 0.981 and 2.155, the rate of waste heat recovery was between 49.12% and 77.70%, and the engine thermal efficiency was between 27.02% and 33.24%.
NSTL
Elsevier