Thermal comfort body control temperatures

Humans and the other warm-blooded animals have developed thermoregulatory systems to carefully control body temperature to levels that enable them to function and survive effectively. In general, thermal comfort occurs when the physiological effort to control body temperature is minimized for the activity. Table. 5.1... 

Outlast controls the production of PCM-based microcapsules for incorporation into textiles and other materials, and the company frequently licenses other companies to produce and seU the microcapsules. Commercial examples include the Lurapret PCMs produced by BASF [8]. These are water-based products that create an optimum temperature balance in textiles. The new treatment offers a high degree of temperature regulation, resulting in a very consistent level of thermal comfort. The material ensures that the wearer feels equally comfortable in conditions of either extreme heat or cold. They function by absorbing excess body heat on physical exertion and returning the stored heat to the body when the temperature falls. 

Hygrometers are instruments used in the measurement of the water vapour content of air, i.e. the humidity. The comfort and efficiency of people depends on their ability to lose heat to the environment so that body temperature may remain constant. In conditions of high temperature and humidity this heat loss cannot occur fast enough. Thus measurement of humidity and its control are important in ensuring the thermal comfort of people at work. There are also some industrial processes, e.g. textile manufacture, whose success depends on a controlled humidity in the mill. 

T0 keep the skin temperature within the 30.4 to 36.4 °C interval, we must put on or take off our clothing according to the external temperature. If clothing could automatically change its thermal resistance according to the temperature, it could control the speed of heat release, and then regulate the inner temperature. We would not need to put it on or take it off very often, and the proper inner temperature would not only increase body comfort, but also reduce fatalities. 

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