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Q1) Two blackbodies are placed 3.6m (D) apart, are parallel rectangles 1.8m (L1) × 3.6m (L2) and directly opposed, as shown in Fig. QI. Surfacelis put at bottom and was kept at T= 95°C while surface 2 is the top one and was kept at T2= 315°C. Given Boltzmann law constant 5.67 x108 W/m2.K i- Calculate the net rate of heat transfer (Q1-2) ii- Calculate the net energy loss rate from surface 1 if the surroundings (space) other than surface 2 behave as a blackbody at 295 K. L, A2 D A, Fig. Q1

Q1) Two blackbodies are placed 3.6m (D) apart, are parallel rectangles 1.8m (L1) × 3.6m (L2) and directly opposed, as shown in Fig. QI. Surfacelis put at bottom and was kept at T= 95°C while surface 2 is the top one and was kept at T2= 315°C. Given Boltzmann law constant 5.67 x108 W/m2.K i- Calculate the net rate of heat transfer (Q1-2) ii- Calculate the net energy loss rate from surface 1 if the surroundings (space) other than surface 2 behave as a blackbody at 295 K. L, A2 D A, Fig. Q1

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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Q1) Two blackbodies are placed 3.6m (D) apart, are parallel rectangles 1.8m (L1) x 3.6m (L2) and directly opposed, as shown in Fig. Q1. Surfacelis put at bottom and was kept at T= 95°C while surface 2 is the top one and was kept at T2= 315°C. Given Boltzmann law constant = 5.67 ×108 W/m2.K* i- Calculate the net rate of heat transfer (Q1-2) ii- Calculate the net energy loss rate from surface 1 if the surroundings (space) other than surface 2 behave as a blackbody at 295 K. Az D A, Fig. Q1
Transcribed Image Text:Q1) Two blackbodies are placed 3.6m (D) apart, are parallel rectangles 1.8m (L1) x 3.6m (L2) and directly opposed, as shown in Fig. Q1. Surfacelis put at bottom and was kept at T= 95°C while surface 2 is the top one and was kept at T2= 315°C. Given Boltzmann law constant = 5.67 ×108 W/m2.K* i- Calculate the net rate of heat transfer (Q1-2) ii- Calculate the net energy loss rate from surface 1 if the surroundings (space) other than surface 2 behave as a blackbody at 295 K. Az D A, Fig. Q1
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