P5 8 How clothing keep us warm

Abstract

In this paper, we investigate how humans keep warm by wearing clothes in a cold environment, assuming an 18 °C room to maintain a body temperature of 34 °C, where heat is lost to the surroundings via conduction, convection, radiation, and evaporation. We are taking into account a forearm as a cylinder of radius r=0.04m, and length, L=0.6m, covered by a 1 cm thick wool layer having thermal conductivity k = 0.04W/m^2 K. From the results, the heat loss without clothing is 50.5 W and with clothing is 7.96W, which means the clothing is able to trap 85% of the heat from escaping to the surrounding .