High Efficiency R-744 Commercial Heat Pump Water Heaters | Zendy

Stefan Elbel | Zendy; Michael Petersen | Zendy

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High Efficiency R-744 Commercial Heat Pump Water Heaters

Author(s) -

Stefan Elbel,

Michael Petersen

Publication year - 2013

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/1076573

Subject(s) - heat pump , evaporator , gas compressor , heat exchanger , environmental science , coefficient of performance , air source heat pumps , process engineering , thermal expansion valve , nuclear engineering , process (computing) , mechanical engineering , engineering , computer science , operating system

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

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