H.W 4.2: A furnace is to be designed for a heat duty of 30 x 10 Btu/hr and efficiency of 75%. The furnace is fired with gaseous fuel at a rate of 17 lb air/lb fuel (NHV- 17000 Btu/lb). The tubes are arranged in two rows and are of 5 in OD., 40 ft length and 2x OD. Spacing, heat rate of 35000 Btu/hr of projected area is recommended. Calculate: 1) % heat absorbed in radiation section (R %). 2) Heat absorbed in the convection section. (State any assumptions used). 3) The number of tubes in the radiation section.
H.W 4.2: A furnace is to be designed for a heat duty of 30 x 10 Btu/hr and efficiency of 75%. The furnace is fired with gaseous fuel at a rate of 17 lb air/lb fuel (NHV- 17000 Btu/lb). The tubes are arranged in two rows and are of 5 in OD., 40 ft length and 2x OD. Spacing, heat rate of 35000 Btu/hr of projected area is recommended. Calculate: 1) % heat absorbed in radiation section (R %). 2) Heat absorbed in the convection section. (State any assumptions used). 3) The number of tubes in the radiation section.
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:H.W 4.2:
A furnace is to be desigued for a heat duty of 30 x 10 Btu/hr and efficiency of
75%. The furnace is fired with gascous fuel at a rate of 17 Ib air/lb fuel (NHV
17000 Btu/lb). The tubes are arranged in two rows and are of 5 in OD., 40 ft length
and 2x OD. Spacing, heat rate of 35000 Btu/hr of projected area is recommended.
Calculate:
1) % heat absorbed in radiation section (R %).
2) Heat absorbed in the convection section. (State any assumptions used).
3) The number of tubes in the radiation section.
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