Advanced Cryogenic Heat Pipe Development Program.
JACKSON AND TULL CHARTERED ENGINEERS SEABROOK MD
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The Phase I effort for the development of advanced cryogenic heat pipe technology demonstrated the feasibility of a high performance cryogenic flexible heat pipe CFHP. The CFHPs design incorporates a circular stainless steel fibrous wick which is homogeneous over the length of the heat pipe and which permits flexibility in any direction. A 40O-mesh sleeve covers the fibrous wick core to provide increased capillary pumping and transport. This permits reducing the wicks cross section and the corresponding fluid inventory which reduces pressure containment requirements and the sutdown energy in liquid trap diode designs. Stainless steel bellows and Hastalloy C evaporator and condenser sections make up the heat pipe envelope. The CFHP was tested with oxygen at 120K and demonstrated repeatable composite pumping with an extrapolated 0 transport capability of 680 watt-in with applied heat loads of up to 16 watts at a 0.375-in adverse tilt. MM