A Computer Simulation Of The Vacuum Building Thew Response To Changes In Environmental Conditions

Abstract

This paper describes the development of a transient model to investigate the thermal response of the Vacuum Building components to changes in ambient conditions as related to the possible freeze of dousing water. The model's predictions were compared with field data from Bruce NGS 'A' Vacuum Building and showed acceptable agreement. A conservative design criterion, based on the coldest winter in one hundred years and a minimum dousing water temperature of 4°C, was developed. By applying the code to different vacuum buildings, it was found that minor direct heating loads may be required to meet the design criterion.