Methodology for predicting frost growth trends on a subcooled cylindrical surface is developed and implemented for multitube array configuration. Extension of conventional analysis and a novel technique for understanding frost formation phenomenon on the cylindrical surfaces is proposed; later one takes into account the nonsteady temperature field, which affects the density and thermal conductivity at a local level in the growing frost mass, for more accurate prediction of thermal resistance. The influence of migration of liquid water due to tortuosity effect is also considered. The results due to new model are found to be in good agreement with the data in the open literature. Data for frost thickness ratio (FTR) versus time for a section of array with four (tube) rows in the airstream are presented and thoroughly analyzed. The trends of FTR noted are complex and considerably dependent on the tube location, temperature of subcooled surface , airflow velocity , and the relative humidity values. Approximate ranges for important parameters are , , and . Presented analysis and the results are valuable in order to predict probable locations and precursors to partial or complete choking of airflow passages due to frost deposition in the evaporator coils.
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e-mail: v.yadav@auckland.ac.nz
e-mail: c.moon@auckland.ac.nz
e-mail: keshav@iitk.ac.in
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Modeling Frost Growth for Subcooled Tube-Array Configurations
V. Yadav,
V. Yadav
Department of Mechanical Engineering,
e-mail: v.yadav@auckland.ac.nz
The University of Auckland
, Auckland 1142, New Zealand
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C. G. Moon,
C. G. Moon
Department of Mechanical Engineering,
e-mail: c.moon@auckland.ac.nz
The University of Auckland
, Auckland 1142, New Zealand
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K. Kant
K. Kant
Former Professor
Department of Mechanical Engineering,
e-mail: keshav@iitk.ac.in
Indian Institute of Technology Kanpur
, Kanpur 208 016, India
Search for other works by this author on:
V. Yadav
Department of Mechanical Engineering,
The University of Auckland
, Auckland 1142, New Zealande-mail: v.yadav@auckland.ac.nz
C. G. Moon
Department of Mechanical Engineering,
The University of Auckland
, Auckland 1142, New Zealande-mail: c.moon@auckland.ac.nz
K. Kant
Former Professor
Department of Mechanical Engineering,
Indian Institute of Technology Kanpur
, Kanpur 208 016, Indiae-mail: keshav@iitk.ac.in
J. Heat Transfer. Jun 2009, 131(6): 062301 (12 pages)
Published Online: March 31, 2009
Article history
Received:
December 2, 2007
Revised:
December 6, 2008
Published:
March 31, 2009
Citation
Yadav, V., Moon, C. G., and Kant, K. (March 31, 2009). "Modeling Frost Growth for Subcooled Tube-Array Configurations." ASME. J. Heat Transfer. June 2009; 131(6): 062301. https://doi.org/10.1115/1.3082424
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