An Experimental Determination of Transient Condensing Heat Transfer with Heat Absorption in Circular Cylinders

Abstract

Since the condensing heat transfer of steam on the container walls is one of the fundamental quantities for the safety analyses after the loss of coolant accidents of light water cooled nuclear reactors, the heat transfer was experimentally obtained in a model container. The temperature variations of a copper cylinder and a brass one installed in the container were measured, after the high pressure saturated water was injected and the heat transfer was calculated by analyzing heat conduction in the cylinders on the assumption that it is invariant in a short time interval Δt. The heat transfer increases to the peak value and then decreases in about 300 seconds to the stationary value which was measured with another expreiment done in the same container. The peak values depend on the energy injection rate into the container. The errors in temperature measurements and heat transfer calculations were examined, and the applicability of this method to similar cases was demonstrated.