Volume 23, Issue 4a-4, December 2019
NEW CLOTHING RESISTANCE SCHEME FOR ESTIMATING OUTDOOR ENVIRONMENTAL THERMAL LOAD
Authors: Ferenc ÁcsA, Erzsébet Kristóf, Annamária Zsákai
Abstract: A new clothing resistance model for estimating outdoor thermal load is proposed and its behavior is analyzed in different weather conditions. It is based on clothed human body energy balance considerations; the human treated is a walking human in outdoor conditions. Weather and human data are taken from the internet site of the Hungarian Meteorological Service and from a Hungarian human dataset, respectively. Environmental thermal load is characterized in terms of clothing resistance rcl and operative temperature. The model’s main strength is that it simulates metabolic rate M as simply as possible. rcl deviations caused by personal variations of M are the largest in extreme cold and warm conditions, in the comfort zone this effect is non-essential. rcl deviations caused by wind speed variations can be especially large in large heat excess cases. Further model tests are needed for more extreme conditions.
Keywords: weather; Hungarian human; environmental thermal load; clothing resistance; operative
temperature; metabolic activity; wind speed
Received: October 23, 2019 | Revised: December 25, 2019 | Accepted: December 26, 2019