High Efficiency R-744 Commercial Heat Pump Water Heaters

Elbel, Dr. Stefan W. ; Petersen, Michael

关键词: R744;    carbon dioxide;    R744;    CO2;    heat pump;    water heater;    HPWH;    heat pump water heater;    commercial;    COP improvement;   

DOI  :  10.2172/1076573
RP-ID  :  DOE/EE0003981-3
PID  :  OSTI ID: 1076573
Others  :  Other: DUNS 148675486
Others  :  EIB 20-0946943

学科分类：能源（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The project investigated the development and improvement process of a R744 (CO2) commercial heat pump water heater (HPWH) package of approximately 35 kW. The improvement process covered all main components of the system. More specific the heat exchangers (Internal heat exchanger, Evaporator, Gas cooler) as well as the expansion device and the compressor were investigated. In addition, a comparison to a commercially available baseline R134a unit of the same capacity and footprint was made in order to compare performance as well as package size reduction potential.