A person stands in front of a fire at 650 C in a room where air is at 5°C. Assuming the body temperature to be 37°C and a connection coefficient of 6 W/m2K, the area exposed to convection as 0.6m2, determine the net heat low from the body. The fraction of radiation from the fire of 1m2 are reaching the person is 0.01.

A person stands in front of a fire at 650 C in a room where air is at 5°C. Assuming the body temperature to be 37°C and a connection coefficient of 6 W/m2K, the area exposed to convection as 0.6m2, determine the net heat low from the body. The fraction of radiation from the fire of 1m2 are reaching the person is 0.01.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.15P: 8.15 A mercury bath at is to be heated by immersing cylindrical electric heating rods, each 20 cm...

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Concept explainers

Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.

Question

A person stands in front of a fire at 650 C in a
room where air is at 5°C. Assuming
the body temperature to be 37°C and a
connection coefficient of 6 W/m2K, the area
exposed to
convection as 0.6m2, determine the net heat
flow from the body. The fraction of radiation
from
the fire of 1m2 are reaching the person is 0.01.

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