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The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C, respectively. The thermal conductivity of the glass is 0.7 W/m °C. Outside 48 °C 2 cm Glass Inside 2- Determine the rate of heat transfer through the window, in W. 18 °C Questions: 1- What is the mode of heat transfer in the above case? 3- Determine the amount of heat loss, in kJ, through the glass over a period of 24 hours. 4- Indicate whether the direction of heat transfer is from inside to outside, or outside to inside? Justify your answer.

The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C, respectively. The thermal conductivity of the glass is 0.7 W/m °C. Outside 48 °C 2 cm Glass Inside 2- Determine the rate of heat transfer through the window, in W. 18 °C Questions: 1- What is the mode of heat transfer in the above case? 3- Determine the amount of heat loss, in kJ, through the glass over a period of 24 hours. 4- Indicate whether the direction of heat transfer is from inside to outside, or outside to inside? Justify your answer.

Introduction to Chemical Engineering Thermodynamics
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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The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C, respectively. The thermal conductivity of the glass is 0.7 W/m °C. Outside 48 °C 2 cm Glass Inside 2- Determine the rate of heat transfer through the window, in W. 18 °C Questions: 1- What is the mode of heat transfer in the above case? 3- Determine the amount of heat loss, in kJ, through the glass over a period of 24 hours. 4- Indicate whether the direction of heat transfer is from inside to outside, or outside to inside? Justify your answer.
Transcribed Image Text:The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C, respectively. The thermal conductivity of the glass is 0.7 W/m °C. Outside 48 °C 2 cm Glass Inside 2- Determine the rate of heat transfer through the window, in W. 18 °C Questions: 1- What is the mode of heat transfer in the above case? 3- Determine the amount of heat loss, in kJ, through the glass over a period of 24 hours. 4- Indicate whether the direction of heat transfer is from inside to outside, or outside to inside? Justify your answer.
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