SET Proceedings

2978-4387

Caravel Press

10.65582/set.2010.094

2010.094

Thermophysical properties of supercritical CO2 and their impacts on transcritical heat pump design

Austin

Brian

brian.austin@ndsu.edu Sumathy

sumathy.krishnan@ndsu.edu Department of Mechanical Engineering, North Dakota State University, Fargo, ND

24082010

9 978-1-995850-04-7 1 8

24 August 2010

2010

Heat pump systems have proven to be an efficient means of space heating and water heating. The refrigerant chosen for heat pump operation can have a marked impact on the system performance. Many conventional refrigerants have been chosen for good performance, but in many cases these refrigerants are toxic, polluting and highly potent greenhouse gases. Carbon dioxide (CO2) is a natural refrigerant whose impact on the environment is negligible in comparison. Carbon dioxide’s low critical point and supercritical properties make it attractive for use in a transcritical heat pump cycle. This paper looks at the properties of supercritical carbon dioxide and how these properties can benefit heat pump system performance.

Carbon Dioxide Heat Pump Natural Refrigerant

24 to 27 August 2010

9th International Conference on Sustainable Energy Technologies

SET2010

Shanghai, China

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