Valeooscope - Air Conditioning System Thermal comfort loop

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Thermal comfort

6.1 The thermal regulation machine in the human body Human beings are warm-blooded, which means that their internal body temperature must stay close to 37°C (±0.5°C). When conditions become uncomfortable, the human body reacts by calling on a number of physiological mechanisms that help to achieve a state of thermal stability: g Vasoconstriction helps to regulate blood circul- ation by reducing the flow of heat to the limbs, while dilatation does the opposite g Shivering causes the body temperature to rise and changes the conditions of the heat exchanges between the skin and the exterior air (goose pimples) g Perspiring cools down the body by evaporation through the surface of the skin. The temperature Heat exchanges between the exterior environment and our bodies take place through our skin. If the temperature of the ambient air is higher than 32.2°C, then this means the transferring of heat is no longer sufficient to keep the body at 37°C, in which case the sweat glands take over and produce perspiration on the surface of our skin. As this sweat evaporates, our skin cools down.

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