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A thermal image of human. Thermal comfort is the condition of mind that expresses subjective satisfaction with the thermal environment. [1] The human body can be viewed as a heat engine where food is the input energy. The human body will release excess heat into the environment, so the body can continue to operate.
As in other mammals, human thermoregulation is an important aspect of homeostasis. In thermoregulation, body heat is generated mostly in the deep organs, especially the liver, brain, and heart, and in contraction of skeletal muscles. [1] Humans have been able to adapt to a great diversity of climates, including hot humid and hot arid.
The human body has two methods of thermogenesis, which produces heat to raise the core body temperature. The first is shivering , which occurs in an unclothed person when the ambient air temperature is under 25 °C (77 °F) [ dubious – discuss ] . [ 18 ]
Because of local convective air currents GT typically lies between the air temperature and MRT. The faster the air moves over the globe thermometer, the closer GT approaches the air temperature. Moreover, since the MRT is defined with respect to the human body, the shape of the sensor is also a factor.
PHOENIX — The human body isn’t built to function at 118 degrees Fahrenheit. Yet, that’s the life-threatening temperature expected in Arizona this weekend, coming on top of weeks of brutal heat.
The statement of Newton's law used in the heat transfer literature puts into mathematics the idea that the rate of heat loss of a body is proportional to the difference in temperatures between the body and its surroundings. For a temperature-independent heat transfer coefficient, the statement is:
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