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EXPERIMENTAL MEASUREMENTS OF THE INTERFACE THERMAL CONDUCTANCE OF A LITHIUM METATITANATE PEBBLE BED
 

Summary: EXPERIMENTAL MEASUREMENTS OF THE INTERFACE THERMAL CONDUCTANCE OF A LITHIUM
METATITANATE PEBBLE BED
A. Abou-Sena, A. Ying, M. Abdou
Mechanical and Aerospace Engineering Department, UCLA, Los Angeles, CA 90095
aliabousena@engineering.ucla.edu
The thermal properties of the lithium ceramics pebble
beds have a significant impact on the temperature profile
of the Helium Cooled Pebble Bed blanket and the
extraction of heat from the pebble beds to the coolant.
The literature review showed a lack of experimental data
on the interface thermal conductance (h) of lithium
metatitanate pebble beds, therefore the objective of this
study is to present experimental values of h. The
measuring technique is based on the principles of steady
state and axial heat flow methods. The lithium
metatitanate pebble bed is single size (1.7-2.0mm
pebbles) with a packing fraction of 61%. The values of h
were measured at the interface of the pebbles with their
container's wall (made of stainless steel 316). The results
showed that h increased from 1800 to 5300W/m2

  

Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles

 

Collections: Plasma Physics and Fusion