A new method for measuring dynamic fabric heat and moisture comfort

摘要

In recent years, a number of people have paid attention to the heat and moisture comfort of textile and clothing. They also brought forward many indices, such as CLO value, moisture permeability index I-m and evaporative cooling efficiency index. These indices obtained certain results about steady comfort in the characterized conditions. But in research of dynamic heat and moisture comfort on the characterized fabric, most scholars took advantage of microenvironment theory and established quantitative indices. According to this theory, the article introduces a new type of testing instrument which can measure the heat and moisture transmitting property of fabrics in the dynamic conditions. Under simulated human body sweating conditions, we use the instrument to measure dynamic changes of vapor pressure, temperature and heat flux. According to the curves measured, heat and moisture ratio (HMR) and relative thermal diffusion ratio (RTDR) are calculated to evaluate the heat and moisture transmitting property of fabrics. It has been proved that two indices can effectively distinguish the heat and moisture transmitting property in latent and apparent sweating conditions. They will be applied prospectively. (c) 2005 Published by Elsevier Inc.