Abstract
In designing ventilation systems for high-temperature plants, some methods based on the assumption that the indoor temperature is uniformly distributed are already established. The temperature gradient there, however, is steeper than in a heated building generally found in commercial or residential areas. For this reason, the present paper describes the scale model studies of mechanical ventilation carried out to develop a new method taking full advantage of the temperature distribution The temperature gradient was far more marked vertically than forizontally, forming a temperature stratification. The temperature stratification was mathematically expressed with the temperature difference ratio which was found to depend on the ratio of the volume of ventilation to surplus heat. The experimental equation of the temperature difference ratio led to a new method for calculating the necessary rate of ventilation which takes into account the full effect of the temperature stratification.
