Studies on a high temperature regenerative heat exchanger for closed cycle MHD power generation. (6th report. Heat transfer analysis in the combustion chamber during the evacuation and argon heating periods).

Abstract

A two-dimensional unsteady heat transfer analysis in the combustion chamber of a pebble bed regenerative heat exchanger for high temperature argon heating has been performed for the evacuation and argon heating periods. The analysis well explains the measured time history of the temperature of the top of the pebble bed facing the combustion chamber during both periods. The analysis also shows that optimization of the height of the combustion chamber is important for maximizing the argon temperature at the exit of the heat exchanger.