From the viewpoint of protecting the ozone layer and preventing global warming, there is now strong demand for science and technology based on ecologically safe ‘natural’ working fluids. A CO2 refrigeration method has been proposed and developed several years ago, using CO2 solid-gas two phase fluid as refrigerant. Heat transfer of the CO2 solid-gas two phase flow in a horizontal tube is important to design of such a refrigeration system. In the present paper, an experiment work is conducted to measure its heat transfer characteristics in the horizontal tube. The results show an average value 310 W/(m2-K) of heat convective coefficient is experimentally obtained, which is much higher than that of gas flow. In the sublimation area, the Nusselt number is observed to increase slowly along the tube length, the phenomena may be physically explained that the sublimation process changes the thermal boundary layer thickness; makes the flow turbulence stronger; or changes the flow and the pressure fields.
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ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
July 19–23, 2009
San Francisco, California, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4358-1
PROCEEDINGS PAPER
Experimental Investigation on Heat Transfer of CO2 Solid-Gas Two Phase Flow With Dry Ice Sublimation Available to Purchase
Xin-Rong Zhang,
Xin-Rong Zhang
Peking University, Beijing, China
Search for other works by this author on:
Hiroshi Yamaguchi
Hiroshi Yamaguchi
Doshisha University, Kyoto, Japan
Search for other works by this author on:
Xin-Rong Zhang
Peking University, Beijing, China
Hiroshi Yamaguchi
Doshisha University, Kyoto, Japan
Paper No:
HT2009-88144, pp. 253-257; 5 pages
Published Online:
March 12, 2010
Citation
Zhang, X, & Yamaguchi, H. "Experimental Investigation on Heat Transfer of CO2 Solid-Gas Two Phase Flow With Dry Ice Sublimation." Proceedings of the ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer. San Francisco, California, USA. July 19–23, 2009. pp. 253-257. ASME. https://doi.org/10.1115/HT2009-88144
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