NEW APPROACHES TO ASSESSMENT OF THERMAL PROPERTIES OF MATERIALS SYSTEM OF CLOTHING FOR OUTDOOR ACTIVITIES
The problem of forming sets of clothing for active recreation in conditions of low temperatures is considered. It is shown that scientifically grounded recommendations for the formation of a set can be drawn up on the basis of the results of mathematical modeling of heat and mass transfer in the system "element of the human body - package of materials - environment". It has been established that the thermophysical properties of materials must be assessed taking into account the air spaces that are formed in the clothing package. As a result of experimental studies, the influence of air layers on the value of the thermophysical properties of the samples under study was established. The dynamics of thermal conductivity of materials that are used in the manufacture of clothing for outdoor activities at low temperatures has been obtained. These data make it possible to assess the effect of air gaps on the dynamics of the thermophysical properties of the selected materials. It is shown that when the ambient temperature rises from -10 ° C to +10 ° C, the thermal conductivity of the samples changes by 20 - 25%.