Analysis of variance of the thermal comfort in vehicles

The thermal environment in a vehicle changes as a function of the external climatic conditions and the quality and capacity of the Heating, Ventilation and Air Conditioning (HVAC) system of the cabin. Different thermal comfort indices have been proposed over the years, the first being the Predicted Mean Vote (PMV) which represents the average thermal sensation felt by a group of people placed in the vehicle. The aim of this paper is the analysis of the PMV using the statistical model “ANalysis Of VAriance (ANOVA) Two-Way”, which offers the possibility to follow the evolution of a phenomenon under different conditions. The idea behind this goal is to introduce air diffusers with a special directions allowing improving mixing between the hot or the cold conditioned air introduced in the cabin and the ambient.