A light and compact heat exchange system was realized using two air-to-refrigerant airfoil heat exchangers and a recirculated heat transport refrigerant. Its heat transfer performance was experimentally investigated. Carbon dioxide or water was used as a refrigerant up to a pressure of 30 MPa. Heat transfer coefficients on the outer air-contact and inner refrigerant-contact surfaces were calculated using an inverse heat transfer method. Correlations were developed for the Nusselt numbers of carbon dioxide and water on the inner refrigerant-contact surface. Furthermore, we proposed a method to evaluate a correction factor corresponding to the thermal resistance of the airfoil heat exchanger.
Conjugate Heat Transfer in Air-to-Refrigerant Airfoil Heat Exchangers
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received October 28, 2013; final manuscript received April 7, 2014; published online May 21, 2014. Assoc. Editor: Giulio Lorenzini.
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Ito, Y., Inokura, N., and Nagasaki, T. (May 21, 2014). "Conjugate Heat Transfer in Air-to-Refrigerant Airfoil Heat Exchangers." ASME. J. Heat Transfer. August 2014; 136(8): 081703. https://doi.org/10.1115/1.4027554
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