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Determine the rate of radiation heat transfer between a person at 32°C and the surrounding surfacesat specified temperatures: a) in summer when the temperature is 23 °C b) in winter when the temperature is 12 °C. Assume: 1. Steady operating conditions exist. 2. Heat transfer by convection is not considered. 3.The person is completely surrounded by the interior surfaces of the room and the exposed body area is 1.6 m². Emissivity of a person ε = 0.95 The Boltzmann constant is 5.67 × 10-8 W/(m².K4)

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