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  • 1
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    Monogroove heat pipe design: Insulated liquid channel with bridging wick (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A screen mesh artery supported concentrically within the evaporator section of a heat pipe liquid channel retains liquid in the channel. Continued and uniform liquid feed to the heat pipe evaporation section (20) during periods of excessive heat transfer is assured. The overall design provides high evaporation and condensation film coefficients for the working fluid by means of the circumferential grooves in the walls of the vapor channel, while not interfering with the overall heat transport capability of the axial groove. The design has particular utility in zero-g environments.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Development of a blocking orifice thermal diode heat pipe (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A new geometry is described for low temperature diode heat pipes employing excess liquid to block the vapor space of the evaporator and part of the transport section during reverse mode conditions. An orifice plate is placed in the pipe at the blocking meniscus location, with the opening arranged to permit proper liquid distribution in both ground tests and zero 'g' operation. Parametric analytical results are presented for several fluids (carbon tetrafluoride, methane, and ethane). Experimental data is presented for a room temperature diode verifying feasibility, and a 1/4 in. O.D. cryogenic diode with methane working fluid.
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: AIAA PAPER 74-754 , Thermophysics and Heat Transfer Conference; Jul 15, 1974 - Jul 17, 1974; Boston, MA
    Format: text
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    NASA TECHNICAL REPORTS
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