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Enhanced Evaporative Surface for Two-Phase Mounting Plates
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English
Abstract
This paper describes an enhancement to a grooved, evaporative surface for two-phase mounting plates. These equipment mounting plates could be used in two-phase thermal control systems such as that on the proposed Space Station.
An aluminum plate is machined with fine, rectangular grooves (39 grooves/cm). This grooved surface is then enhanced by an inexpensive process called Ivadizing™ (equipment for this process is patented by McDonnell Douglas). During Ivadizing, aluminum is vapor deposited onto the surface, forming a slightly porous coating on the land area between the grooves. The resulting surface has a much larger evaporative heat transfer coefficient and capillary pumping ability than that with plain, rectangular grooves.
We have used Ivadizing to enhance a mounting plate evaporative surface. Tests of this plate with R-11 showed improvement in evaporative heat transfer coefficient by a factor of 4. Analytic studies show that this enhanced surface should have at least three times the capillary pumping capacity of the rectangular grooved surface.
Authors
Citation
Grote, M., Stark, J., and Tefft, E., "Enhanced Evaporative Surface for Two-Phase Mounting Plates," SAE Technical Paper 860979, 1986, https://doi.org/10.4271/860979.Also In
References
- Grote, M. G. Swanson, T. D. “Design and Test of a Pumped Two-Phase Mounting Plate” AIM 20th Thermophysics Conference Williamsburg, VA 1985
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- Straub, L. G. Silberman, G. Nelson, H. C “Open Channel Flow at Small Reynolds Numbers” ASCE Paper No. 2935 1958
- Vasiliev, L. L. Grakovich, L. P. Krustolev, D. K. “Low Temperature Axially Grooved Heat Pipes” Advances in Heat Pipe Technology 1982