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Thermal Vacuum Testing of the Capillary Pumped Loop Flight Experiment
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English
Abstract
The Capillary Pumped Loop Flight Experiment (CAPL) is a prototype of the Earth Observing System (EOS) instrument thermal control systems, which are based on two-phase heat transfer technology. The CAPL experiment has been functionally tested in a thermal vacuum chamber at NASA's Goddard Space Flight Center (GSFC). The tests performed included start-up tests, simulated EOS instrument power profiles, low and high power profiles, a variety of uneven coldplate heating tests, subcooling requirement tests, an induced deprime test, reprimes, saturation temperature changes, and a hybrid (mechanical pump-assist) test. There were a few unexpected evaporator deprimes, but overall the testing was successful. The results of all of the tests are discussed, with emphasis on the deprimes and suspected causes.
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Citation
Ottenstein, L., Ku, J., and Butler, D., "Thermal Vacuum Testing of the Capillary Pumped Loop Flight Experiment," SAE Technical Paper 941599, 1994, https://doi.org/10.4271/941599.Also In
References
- Butler, D. Hoang T. “The Enhanced Capillary Pumped Loop Flight Experiment: A Prototype of the EOS Platform Thermal Control System,” Paper No. 91-1377 AIAA 26th Thermophysics Conference Honolulu, Hawaii June 24-26 1991
- Ku, J. Yun, S. Kroliczek E. “A Prototype Heat Pipe Heat Exchanger for the Capillary Pumped Loop Flight Experiment,” Paper No. 92-2910 AIAA 27th Thermophysics Conference Nashville, Tennessee July 6-8 1992
- Wolf, D. “Design and Development of a Two-Phase Reservoir for the Capillary Pumped Loop (CAPL) Flight Experiment,” SAE Paper 921405 22nd International Conference on Environmental Systems Seattle, Washington July 13-15 1992
- Ottenstein, L Ku, J. Butler D. “Testing of Flight Components for the Capillary Pumped Loop Flight Experiment,” SAE Paper 932235 23rd International Conference on Environmental Systems Colorado Springs, Colorado July 12-15 1993
- Ottenstein, L. “Capillary Pumped Loop Flight Experiment Thermal Vacuum Test Report,” NASA/Goddard Space Flight Center Greenbelt, Maryland November 1993
- Ku, J. Swanson, T. Kolos, K. Herold K. “Flow Visualization within a Capillary Evaporator,” SAE Paper 932236 23rd International Conference on Environmental Systems Colorado Springs, Colorado July 12-15 1993