NT-87-03-6 -- Engine-Driven Heat Pump Performance Analysis PDF

This paper presents performance and cost information to assist designers in evaluating the selection of HVAC components, system configurations, values for component design variables, and operating strategies for natural gas engine driven heat pumps. A steady-state computer model for performance simulation of engine-driven and electrically driven heat pumps was prepared and used for parametric and seasonal performance analyses. Parametric analysis showed the effect of variables associated with the design of recuperators, engine coolant coils, domestic hot water heat exchangers, compressor size, engine efficiency, and insulation levels on engine exhaust and coolant piping. Seasonal performance data were prepared for residential and commercial units in six cities with system configurations closely related to existing or contemplated engine hardware. Similar data were prepared for an advanced variable-speed electric unit for comparfson purposes. The effect of domestic hot water production on operating costs was determined and four fan operating strategies were explored.

Units: Dual