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Fine Temperature Control of Coupled Fluid-Looped Radiators Operating Under Differently Varying Sink Conditions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published July 09, 2001 by SAE International in United States
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Thermal/hydraulic analyses are made for optimal design and in-orbit operations of a fluid-looped two-radiator system, which could be used for tighter temperature control of a thermoelectrically-cooled mission equipment. Analysis results are mathematically rearranged to construct a plain algorithm suited to design calculations. Computations upon that algorithm provide us with several groups of curves applicable to preliminary design of fluid loops with serially-connected radiators. All such curves are actually used in reasonably determining design specifications of an ammonia/propylene-based cooling loop of our concern. A simplified solution method is then introduced for off-design operations problems to readily find the resulting heat rejection, the required pumping power, the required pump speed, the resulting temperature drop, the resulting cold plate temperature, and so on. Solutions under various sink conditions, ranging from the coldest to the hottest, are graphically shown in the figures. A cascade controller, consisting of a state predictor and a proportional-integral regulator, is proposed for pump speed modulation met to varying orbital heat inputs. The steady-state solutions are compiled as a computational basis of the predictor. Linearized governing equations are Laplace-transformed to yield a transfer function, which is reduced to an exponentially-modified fractional expression. The lag time and the dead time characterizing that expression are displayed in the figures, from which one may easily derive a suitable set of the proportional gain and the reset time of the regulator.
CitationFurukawa, M., "Fine Temperature Control of Coupled Fluid-Looped Radiators Operating Under Differently Varying Sink Conditions," SAE Technical Paper 2001-01-2260, 2001, https://doi.org/10.4271/2001-01-2260.
- Mcintosh, R. Kaylor, M. Buchko, M. Kroliczek, E. Smith, R. “A Capillary Pump Loop Cooling System for the NICMOS Instrument” SAE 981814 , 28th ICES July 1993
- Nikitkin, M. Cullimore, B. “CPL and LHP Technologies: What are the Differences, What are the Similarities?” SAE 981587 , 28th ICES July 1998
- Kaya, T. Baker, C Ku, J. “Comparison of Thermal Performance Characteristics of Ammonia and Propylene Loop Heat Pipes” 2000-01-2406, 30th ICES Toulouse, France July 2000
- Mihara, T. et al “Monitor of All-sky X-ray Image (MAXI)” Space Technology and Applications International Forum 2000, AIP Conf. Proc. 504 Jan./Feb. 2000 Albuquerque, NM 181 186
- Tomida, H. et al “Solid state Slit Camera (SSC) of the MAXI Mission for the JEM on the ISS” X-Ray and Gamma-Ray Instrumentation for Astronomy XI, Proc. SPIE 4140 Aug. 2000 San Diego, CA 304 312
- Birur, G.C. Bhandari, P. “Mars Pathfinder Active Heat Rejection System: Successful Flight Demonstration of a Mechanically Pumped Cooling Loop” SAE 981684 , 28th ICES Danvers, MA July 1998
- Birur, G.C. Bhandari, P. Gram, M.B. Durkee, J. “Integrated Pump Assembly-An Active Cooling - System for Mars Pathfinder Thermal Control” SAE 961489 , 26th ICES Monterey, CA July 1996
- Reusser, P. U. De Parolis, M.N. Desjean-Amould, M.C. “Life Tests Results of a Controlled Pump Assembly for Application on S/C Cooling Loops” SAE 972351 , 27th ICES Lake Tahoe, NV July 1997
- Matteau, D.P. Nikbin, Si “A Two-Phase Fluid Pump for Use in Microgravity Environments” 1999-01-1979, 29th ICES Denver, CO July 1999
- Maurin, J. Benoit, J. Daval, J. Lorigny, E. Werling, E. “Minipump for Two-Phase Cooling Loop” 2000-01-2374, 30th ICES Toulouse, France July 2000
- Morozumi, N. et al “Development of Pumps for Two-Phase Fluid Loops” SAE 901273 , 20th ICES Williamsburg, VA July 1990
- “Thermoelectric Cooling” Sept. 1990 95 105
- Furukawa, M. “Application of Classical Control Theory to Off-Design Operations of a Fluid Loop System” SAE 941349 , 24th ICES Friedrichshafen, Germany June 1994