On heat balance in coal-fired MHD systems, channel heat transfer and electrode temperature distribution

This paper presents results from heat transfer studies performed in 7.5 MW/sub t/ and 15 MW/sub t/ direct coal-fired magnetohydrodynamic systems for electrical power generation. Heat transfer from the various components is measured to determine system heat balance and the influence of parameters related to coal combustion on heat transfer. Measured heat flux from electrode walls is compared with a quasi one-dimensional model and extended for off-design operation. The heat flux values are used in a computer model to evaluate temperature distribution in electrode frames and caps and are compared with measurements taken during power runs. 9 refs