The original analytical model for predicting the maximum heat transport capacity in micro heat pipes, as developed by Cotter, has been re-evaluated in light of the currently available experimental data. As is the case for most models, the original model assumed a fixed evaporator region and while it yields trends that are consistent with the experimental results, it significantly overpredicts the maximum heat transport capacity. In an effort to provide a more accurate predictive tool, a semi-empirical correlation has been developed. This modified model incorporates the effects of the temporal intrusion of the evaporating region into the adiabatic section of the heat pipe, which occurs as the heat pipe approaches dryout conditions. In so doing, the current model provides a more realistic picture of the actual physical situation. In addition to incorporating these effects, Cotter’s original expression for the liquid flow shape factor has been modified. These modifications are then incorporated into the original model and the results compared with the available experimental data. The results of this comparison indicate that the new semiempirical model significantly improves the correlation between the experimental and predicted results and more accurately represents the actual physical behavior of these devices.
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Research Papers
The Heat Transport Capacity of Micro Heat Pipes
J. M. Ha,
J. M. Ha
Department of Mechanical Engineering, Texas A&M University, College, TX 77843-3123
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G. P. Peterson
G. P. Peterson
Department of Mechanical Engineering, Texas A&M University, College, TX 77843-3123
Search for other works by this author on:
J. M. Ha
Department of Mechanical Engineering, Texas A&M University, College, TX 77843-3123
G. P. Peterson
Department of Mechanical Engineering, Texas A&M University, College, TX 77843-3123
J. Heat Transfer. Nov 1998, 120(4): 1064-1071 (8 pages)
Published Online: November 1, 1998
Article history
Received:
April 4, 1996
Revised:
May 29, 1998
Online:
December 5, 2007
Citation
Ha, J. M., and Peterson, G. P. (November 1, 1998). "The Heat Transport Capacity of Micro Heat Pipes." ASME. J. Heat Transfer. November 1998; 120(4): 1064–1071. https://doi.org/10.1115/1.2825891
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