In this investigation, a Loop Heat Pipe (LHP) evaporator has been studied using a borescope inserted through the compensation chamber into the liquid core. This minimally intrusive technique allows liquid/vapor interactions to be observed throughout the liquid core and compensation chamber. A low conductivity ceramic was used for the wick and ammonia as the working fluid. Results indicate that buoyancy driven flows, both two-phase and single-phase, play essential roles in evacuating excess heat from the core, which explains the several differences in performance between horizontal and vertical orientations of the evaporator. This study also found no discernable effect of the pre-start fill level of the compensation chamber on thermal performance during startup at moderate and high heat loads.
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ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
August 10–14, 2008
Jacksonville, Florida, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4848-7
PROCEEDINGS PAPER
Investigation of Loop Heat Pipe Startup Using Liquid Core Visualization
B. P. d’Entremont,
B. P. d’Entremont
Clemson University, Clemson, SC
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J. M. Ochterbeck
J. M. Ochterbeck
Clemson University, Clemson, SC
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B. P. d’Entremont
Clemson University, Clemson, SC
J. M. Ochterbeck
Clemson University, Clemson, SC
Paper No:
HT2008-56387, pp. 387-393; 7 pages
Published Online:
July 7, 2009
Citation
d’Entremont, BP, & Ochterbeck, JM. "Investigation of Loop Heat Pipe Startup Using Liquid Core Visualization." Proceedings of the ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. Heat Transfer: Volume 2. Jacksonville, Florida, USA. August 10–14, 2008. pp. 387-393. ASME. https://doi.org/10.1115/HT2008-56387
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