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MODEL FOR DETERMINING THE EFFECTIVE THERMAL CONDUCTIVITY OF PARTICLE BEDS WITH HIGH SOLID-TO-GAS THERMAL
 

Summary: MODEL FOR DETERMINING THE EFFECTIVE THERMAL CONDUCTIVITY
OF PARTICLE BEDS WITH HIGH SOLID-TO-GAS THERMAL
CONDUCTIVITY RATIO
A.R. Raffray, Z. Gorbis, A. Badawi, M.S. Tillack, A.Y. Ying, and M. A. Abdou
Fusion Engineering Group; Mechanical, Aerospace and Nuclear Engineering Department,
University of Califomia, Los Angeles CA 90024-1597
Abstract
A Be packed bed between the high temperature breeder and
low temperature coolant has been proposed for an ITER solid
breeder base blanket. A particularly attractive feature of such a
design is the possibility of'adjusting ihe solid breeder temperature
through active control of the packed bed effective conductivity.
Such control can potentially be achieved by varying the pressure
or flow rate of the helium purge flowing through the Be packed
bed. This paper describes a modeling effort directed at estimating
the effective thermal conductivity of pebble beds with high solid-
to-gas conductivity ratio (such as Be and He). The model has the
capability of accounting for different particle sizes and surface
contact characteristics, which are particularly important in
determining the extent to which the bed effective thermal

  

Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles
Raffray, A. René - Center for Energy Research, University of California at San Diego

 

Collections: Plasma Physics and Fusion