Conference Year



gas heat pump, GHP


Building space cooling is, and until 2040 is expected to continue to be, the single largest use of electricity in the residential sector in the United States. Increases in electric-grid peak demand leads to higher electricity prices, system inefficiencies, power quality problems, and even failures. Thermally-activated systems, such as gas engine-driven heat pump (GHP), can reduce peak demand. This study describes the performance of a residential scale GHP. It was developed as part of a cooperative research and development agreement (CRADA) that was authorized by the Department of Energy (DOE) between OAK Ridge National Laboratory (ORNL) and Southwest Gas. Results showed the GHP produced 4.7 RT of cooling capacity at 95°F (35°C) rating condition with gas coefficient of performance (COP) of 0.99. In heating, the GHP produced 5.75 RT with a gas COP of 1.33. The study also discusses other benefits and challenges facing the GHP technology such as cost, reliability, and noise.