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Please Visit Our Sponsor  Gift Shop Sintered Plug Flow Modulation of a Vapor-Liquid Phase Separation for Helium II VesselT.H.K. Frederking, C. Chuang, Y. Kamioka, J.M. Lee, and S.W.K. Yuan University of California, Los Angeles Los Angeles, CA 90024, U.S.A. ABSTRACT Future planned space missions will require extended cryogen storage. Thermodynamic state control of the cryogenic liquid He II requires well-defined separation of the vapor from the liquid at the vessel vent line exit. For such systems designed to operate in the range from 1K to 2K, vapor-liquid phase separation of superfluid He II has been extensively studied with passive devices and active systems. In practical systems however, variable heat loading of the cold He II reservoir is often encountered. To prolong cryogen life span, optimum performance of such systems by the use of active flow modulation devices is needed. System developments and designs under consideration include mass flow modulation using components movable in either the flow direction (A), or perpendicular to the flow through the separator (B). Variation of the thermomechanical driving potential by use of a downstream heating element has also been investigated. The present paper has the purpose of describing a system incorporating a variable area component of the type B, i.e., downstream of the plug. After a discussion of porous plug flow characterization, the system is outlined, and experimental results are presented, and conclusions drawn. Download this Paper Do You Know Someone Who Needs A Job in Engineering, Physics or Chemistry? About the author- Dr. Sidney Yuan is a consultant in the field of Low Temperature Physics and Cryogenics, and has written a Book on Cryogenics and published extensively in the field. E-Mail. Bookmark This Page Send This Page To A Friend 
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