A Simple Method for Objective Evaluation of Thermal Environment

For predicting the thermal comfort in a space, it is essential to know the basic parameters, so some evaluating indices may be calculated from them. The PMV (Fanger, 1970) index is widely used but it's inconvenient to be calculated. This paper describes a dimensionless number named HB (Heat Balance), its reciprocal indicates the percentage of sensible heat loss in total body heat production. The expression is deduced and the relation equation between PMV and HB is given, so it can be used for objective evaluation of thermal environment or a simply way to calculate PMV.