This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Transient Characterization of a Propylene Loop Heat Pipe During Startup and Shut-down
Technical Paper
2000-01-2408
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A technology demonstration Loop Heat Pipe (LHP) has been tested extensively in support of the implementation of this two-phase thermal control technology on NASA's Earth Observing System Tropospheric Emission Spectrometer (TES) instrument. This cryogenic instrument is being developed at the Jet Propulsion Laboratory for NASA. This paper reports on the transient characterization testing results for a propylene LHP. Steady state performance and model correlation results can be found elsewhere [1].
In applications, when a component of large mass on an instrument or spacecraft is attached to a LHP evaporator, there is a concern that the LHP will not start when power is applied to the component until a significant temperature overshoot from the equilibrium temperature is developed. In some space applications, this may be a problem because the maximum allowable flight temperatures (AFTs) may be exceeded. Similarly, when power is removed from the component, there is a concern that the LHP will continue to operate, for some extended period of time, due to the sensible heat available from the large mass. Its important to understand the LHP behavior in such a situation in order to make reliable component temperature predictions for non-operating scenarios and to prevent component temperatures from dropping below the minimum non-operating AFT limits.
A test program was developed to characterize the startup and shut-down transient behavior of a propylene LHP with a large mass attached to the evaporator. The LHP was tested over the expected operational temperature and power range during ground test operations and in flight for the TES instrument. In addition, a startup heater was implemented on the LHP evaporator and tested under similar conditions. Transient results show the magnitude of the overshoot with and without the startup heater. Recommendations are made for future applications and additional research on this topic.
Authors
Citation
Rodriguez, J., Pauken, M., and Na-Nakornpanom, A., "Transient Characterization of a Propylene Loop Heat Pipe During Startup and Shut-down," SAE Technical Paper 2000-01-2408, 2000, https://doi.org/10.4271/2000-01-2408.Also In
References
- Pauken M. Rodriguez, J.I. “Performance Characterization and Model Verification of a Loop Heat Pipe,” 30 th SAE Technical Paper Series, Paper No. 00ICES-108 Toulouse, France July 2000
- Goncharov, K.A. Nikitkin, M.N. Golovin, O.A. Fershtater, Y.G. Maidanik Y.F. Piukov, S.A. “Loop Heat Pipes in Thermal Control Systems for OBZOR Spacecraft,” 25 th ICES, SAE Technical Paper Series, Paper No. 951555 July 1995
- Orlov, A.A. Goncharov, K.A. Kotlyarov E.Y. Tyklina, T.A. “The Loop Heat Pipe Experiment on Board the GRANAT Spacecraft,” 6 th European Symposium on Space Environmental and Control Systems Noordwijk, Netherlands 1997
- Ku, J. “Operating Characteristics of Loop Heat Pipes,” SAE Paper No. 1999-01-2007 July 1999
- Sasin, V.Y. Zelenov, I.A. Zuev V.G Kotlyarov, E.Y. “Mathematical Model of a Capillary Loop Heat Pipe with a Condenser-Radiator,” SAE Technical Paper Series, Paper No. 901276 July 1990
- Nikitkin, M. Cullimore, B. “CPL and LHP Technologies: What are the Differences, What are the Similarities?,” SAE Technical Paper Series, Paper No. 981587 July 1998
- Maidanik, Y.F. Fershtater Y.G. Solodovnik, N.N. “Loop Heat Pipes: Design, Investigation, Prospects of Use in Aerospace Technics,” SAE Technical Paper Series, Paper No. 941185 April 1994
- Wolf, D.A. Ernst D.M. Phillips, A.L. “Loop Heat Pipes - Their Performance and Potential,” SAE Technical Paper Series, Paper No. 941575 June 1994
- Maidanik, Y.F. et al. “Development and Experimental Investigation of Loop Heat Pipes,” 7 th International Heat Pipe Conference 1990
- Maidanik, Y.F. Fershtater, Y.G. Pastukhov, V.G. Vershinin S.V. Goncharov, K.A. “Some Results of Loop Heat Pipes Development, Tests and Application in Engineering,” 5 th International Heat Transfer Symposium Melbourne, Vic. 1996
- Maidanik, Y. Vershinin, S. Solodovnik, N. Gluck, D. Gerhart, C. “Some Results of the Latest Developments and Tests of Loop Heat Pipes,” 33 rd Intersociety Energy Conversion Conference LaGrange Park, IL 1998
- Kaya, T. Hoang, T.T. Ku J. Cheung, M.K. “Mathematical Modeling of Loop Heat Pipes,” 37 th Aerospace Science Meeting and Exhibit, Paper No. AIAA 99-0477 January 1999
- Cheung, M.K. Hoang, T.T. Ku J. Kaya, T. “Thermal Performance and Operational Characteristics of Loop Heat Pipes (NRL LHP),” SAE Technical Paper Series, Paper No. 981813 July 1998
- Douglas, D. Douglas, D. Ku. J. Kaya, T. “Testing of the Geoscience Laser Altimeter System Prototype Loop Heat Pipe,” 37 th Aerospace Science Meeting and Exhibit, Paper No. AIAA 99-0473, January 1999
- Rodriguez, J.I. “Thermal Design of the Tropospheric Emission Spectrometer Instrument,” 30 th SAE Technical Paper Series, Paper No. 00ICES-161 Toulouse, France July 2000