Journal article

Theoretical performance analysis of heat pump water heaters using carbon dioxide as refrigerant

Pramote Laipradit, Jirawan Tiansuwan, Tanongkiat Kiatsiriroat, Lu Aye

INTERNATIONAL JOURNAL OF ENERGY RESEARCH | JOHN WILEY & SONS LTD | Published : 2008

Abstract

The aim of this paper is to simulate the performance of an air source heat pump water heater using carbon dioxide (CO2) as a working fluid. The heat pump water heating system consists of a compressor, a gas cooler, an expansion device and an evaporator. The computer simulation model has been developed by using the heat transfer data and the thermodynamic properties Of CO2. The effects on the heat pump performance by the operating parameters such as the compressor rotational speed, the inlet water temperature at the gas cooler, the inlet air temperature at the evaporator and the mass flow rate ratio of water to refrigerant were presented. For rated capacities of a 4 kW compressor with a 10 kW..

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University of Melbourne Researchers