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Thermodynamic modeling of the no-vent fill methodology for transferring cryogens in low gravityThe filling of tanks with cryogens in the low-gravity environment of space poses many technical challenges. Chief among these is the inability to vent only vapor from the tank as the filling proceeds. As a potential solution to this problem, the NASA Lewis Research Center is researching a technique known as No-Vent Fill. This technology potentially has broad application. The focus is the fueling of space based Orbital Transfer Vehicles. The fundamental thermodynamics of the No-Vent Fill is described. The model is then used to conduct a parametric investigation of the key parameters: initial tank wall temperature, liquid-vapor interface heat transfer rate, liquid inflow rate, and inflowing liquid temperatures. Liquid inflowing temperature and the liquid-vapor interface heat transfer rate seem to be the most significant since they influence the entire fill process. The initial tank wall temperature must be sufficiently low to prevent a rapid pressure rise during the initial liquid flashing state, but then becomes less significant.
Document ID
19880061538
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chato, David J.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1988
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
AIAA PAPER 88-3403
Accession Number
88A48765
Distribution Limits
Public
Copyright
Other

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