A person is trying to keep cool on a hot summer day by using a fan and exposing his/her body to air flow. The air temperature is To = 32°C, and the fan is blowing air at a velocity of vo = 5 m/s. The surrounding surfaces are at Tsur = 40°C, and the emissivity of the person can be taken as ɛ = 0.9. If the person is doing light work and generating sensible heat at a rate of 90 W, determine the average temperature of the outer surface of the person. The average human body can be treated as a 30-cm diameter cylinder with an exposed surface area of 1.7 m².
A person is trying to keep cool on a hot summer day by using a fan and exposing his/her body to air flow. The air temperature is To = 32°C, and the fan is blowing air at a velocity of vo = 5 m/s. The surrounding surfaces are at Tsur = 40°C, and the emissivity of the person can be taken as ɛ = 0.9. If the person is doing light work and generating sensible heat at a rate of 90 W, determine the average temperature of the outer surface of the person. The average human body can be treated as a 30-cm diameter cylinder with an exposed surface area of 1.7 m².
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:A person is trying to keep cool on a hot summer day by using a fan and exposing his/her body
to air flow. The air temperature is To = 32°C, and the fan is blowing air at a velocity of vo = 5
m/s. The surrounding surfaces are at Tsur = 40°C, and the emissivity of the person can be taken
as ɛ = 0.9. If the person is doing light work and generating sensible heat at a rate of 90 W,
determine the average temperature of the outer surface of the person. The average human body
can be treated as a 30-cm diameter cylinder with an exposed surface area of 1.7 m?.
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