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  • 1
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    Design and Testing of a Cryogenic Capillary Pumped Loop Flight Experiment (1998)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: This paper details the flight configuration and pre-flight performance test results of the fifth generation cryogenic capillary pumped loop (CCPL-5). This device will fly on STS-95 in October 1998 as part of the CRYOTSU Flight Experiment. This flight represents the first in-space demonstration of a CCPL, a miniaturized two-phase fluid circulator for thermally linking cryogenic cooling sources to remote cryogenic components. CCPL-5 utilizes N2 as the working fluid and has a practical operating range of 75-110 K. Test results indicate that CCPL-5, which weighs about 200 grams, can transport over 10 W of cooling a distance of 0.25 m (or more) with less than a 5 K temperature drop.
    Keywords: Fluid Mechanics and Heat Transfer
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Design and Testing of a Cryogenic Capillary Pumped Loop Flight Experiment (1998)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: This paper details the flight configuration and pre-flight performance test results of the fifth generation cryogenic capillary pumped loop (CCPL-5). This device will fly on STS-95 in October 1998 as part of the CRYOTSU Flight Experiment. This flight represents the first in-space demonstration of a CCPL; a miniaturized two-phase fluid circulator for thermally linking cryogenic components. CCPL-5 utilizes N2 as the working fluid and has a practical operating range of 75-110 K. Test results indicate that CCPL-5, which weighs about 200 grams, can transport over 10 W of cooling a distance of 0.25 m (or more) with less than a 5 K temperature drop.
    Keywords: Fluid Mechanics and Heat Transfer
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    A prototype heat pipe heat exchanger for the capillary pumped loop flight experiment (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A Capillary Pumped Two-Phase Heat Transport Loop (CAPL) Flight Experiment, currently planned for 1993, will provide microgravity verification of the prototype capillary pumped loop (CPL) thermal control system for EOS. CAPL employs a heat pipe heat exchanger (HPHX) to couple the condenser section of the CPL to the radiator assembly. A prototype HPHX consisting of a heat exchanger (HX), a header heat pipe (HHP), a spreader heat pipe (SHP), and a flow regulator has been designed and tested. The HX transmits heat from the CPL condenser to the HHP, while the HHP and SHP transport heat to the radiator assembly. The flow regulator controls flow distribution among multiple parallel HPHX's. Test results indicated that the prototype HPHX could transport up to 800 watts with an overall heat transfer coefficient of more than 6000 watts/sq m-deg C. Flow regulation among parallel HPHX's was also demonstrated.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIAA PAPER 92-2910
    Format: text
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  • 4
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    An improved high power hybrid capillary pumped loop (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: In order to improve performance testing, NASA's High-Power Spacecraft Thermal Management system has been modified through (1) an augmentation of heat-dissipation capacity of the condenser sink for steady-state high power operation, (2) the addition of more pressure transducers for pressure-drop monitoring in various system components, (3) the installation of pressure-contact thermocouples on the evaporators to measure heating surface temperature, (4) the provision of a coolant loop to one of the evaporator plates, (5) the placing of a transient fluid flow-monitoring load cell in the reservoir, and (6) the reorientation of the reservoir to reduce compressed vapor effects. The system is now capable of 10 hours of continuous capillary mode operation at an input power level of 20 kW.
    Keywords: SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Type: SAE PAPER 891566
    Format: text
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  • 5
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    Heat Pipe Design Handbook: Volume I (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: No abstract available
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA-CR-163661
    Format: application/pdf
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  • 6
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    Heat Pipe Design Handbook: Volume II (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This volume consists of a discussion of Fluid Properties (Chapter 1) and a description of the available Heat Pipe Computer Codes (Chapter 2). Appendix A contains appropriate International Scientific Units (SI) and Conversion Factors. The Users Manual for the Heat Pipe Fluid Properties Program (HPF) which is used to generate the fluid property data is presented in Appendix B. Tabulated fluid property data are listed in Appendix C.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA-CR-163662
    Format: application/pdf
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