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Partial-load operation characteristics of air-source gas engine-driven heat pump system in heating mode.

Author(s) : CHEN X., LI S., FENG Z., SONG W., SHU J., MA Z., HAO C.

Type of article: IJR article

Summary

The air-source gas engine-driven heat pump system, integrating a heat pump subsystem with an engine power unit and heat-recovery subsystem, constitutes a distributed energy technology enabling efficient utilization of clean primary energies. Compared to traditional heating technologies such as gas-fired boilers, electric-driven heat pumps, etc., gas engine-driven heat pump technology features excellent resilience in heating capacity and higher energy efficiency, thereby outperforming the others in practical applications. This research carries out an experimental investigation into gas engine-driven heat pump system under partial-load conditions based on a self-built experimental platform. The influence of the engine speed, outlet water temperature and ambient temperature on the partial-load heating performance of the gas engine-driven heat pump system were measured and analyzed parametrically. The results showed that the gas engine-driven heat pump system presented decent heating capacities, reaching 66.81 % and 44.04 % of the rated heating capacities (i.e., 85 kW) at 50 % and 30 % of the rated-load, when the ambient temperature and outlet water temperature were 7 ◦ C and 45 ◦ C, respectively. The corresponding primary energy ratio reached 1.52 and 1.45, which was much higher than that of traditional boilers (ranging from 0.85 to 1.05). It was also found that under low-load conditions, the ambient temperature exerted a substantial impact on heating capacities which was deteriorated when decreasing the ambient air temperature. The research findings are useful to guide the optimal operation of gas engine-driven heat pump in practical applications.

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Pages: 11 p.

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Details

  • Original title: Partial-load operation characteristics of air-source gas engine-driven heat pump system in heating mode.
  • Record ID : 30034498
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 181
  • Publication date: 2026/01
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2025.11.006

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