Theoretical Analysis of Effective Thermal Conductivity for the Chinese HTR-PM Heat Transfer Test Facility

Abstract

Abstract:The Chinese high temperature gas-cooled reactor pebble bed module (HTR-PM) demonstration project has attracted increasing attention. In order to support the project, a large-scale heat transfer test facility has been constructed for pebble bed effective thermal conductivity measurement over the whole temperature range (0~1600 • C). Based on different heat transfer mechanisms in the randomly packed pebble bed, three different types of effective thermal conductivity have been theoretically evaluated. A prediction of the total effective thermal conductivity of the pebble bed over the whole temperature range is provided for the optimization of the test facility and guidance of further experiments.

A Deep Neural Network Model of Particle Thermal Radiation in Packed Bed

“…Commonly, the particle size in many cases of the packed beds is in range of 1.0 ∼ 10.0 mm and it is much smaller than the pebbles of 60 mm in diameter in pebble bed. In recent years, the measurements of pebble beds operated under the similar conditions of the nuclear reactor are conducted in the high temperature test unit (HTTU) (Rousseau et al 2014) and test facility for pebble bed equivalent conductivity measurement (TF-PBEC) (Ren et al 2017). The particles are spheres of graphite.…”