What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room whose ambient temperature is 22.0°C. The person has a normal skin temperature of 33.0°C and a surface area of 1.50 m². The emissivity of skin is 0.97 in the infrared, where the radiation takes place.
What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room whose ambient temperature is 22.0°C. The person has a normal skin temperature of 33.0°C and a surface area of 1.50 m². The emissivity of skin is 0.97 in the infrared, where the radiation takes place.
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Transcribed Image Text:What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room whose
ambient temperature is 22.0°C. The person has a normal skin temperature of 33.0°C and a surface area
of 1.50 m². The emissivity of skin is 0.97 in the infrared, where the radiation takes place.
Expert Solution
Introduction:
- Heat transfer can take place without any medium. This type of heat transfer is known as heat radiation. In radiative heat transfer, the heat energy is carried by electromagnetic radiation.
- The rate of heat transfer through radiation is given by Stefan-Boltzmann's law of radiation. It is given by,
Here σ is the Stefan-Boltzmann constant, e is the emissivity which defines how well an object radiates energy, A is the area, and T is the absolute temperature in kelvin.
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