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A// A furnace is to be designed for heat duty 4,500,000 Btu / hr. and efficiency 40 %, the furnace is fired with gaseous fuel at a rate 0.03 lb. fuel / lb. air (NHV 13,500 Btu/ lb.). The tubes are arranged in two rows and are 5 inch OD, 40 ft. length and 20D spacing while the heat rate 4500 Btu / hr. of projected are is recommended. Calculate: 1- Amount of heat adsorbed in radiation section. 2- Amount of heat adsorbed in convection section. Assume % heat wall losses =5% and % heat stack losses =12%.

A// A furnace is to be designed for heat duty 4,500,000 Btu / hr. and efficiency 40 %, the furnace is fired with gaseous fuel at a rate 0.03 lb. fuel / lb. air (NHV 13,500 Btu/ lb.). The tubes are arranged in two rows and are 5 inch OD, 40 ft. length and 20D spacing while the heat rate 4500 Btu / hr. of projected are is recommended. Calculate: 1- Amount of heat adsorbed in radiation section. 2- Amount of heat adsorbed in convection section. Assume % heat wall losses =5% and % heat stack losses =12%.

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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A// A furnace is to be designed for heat duty 4,500,000 Btu / hr. and efficiency 40 %, the furnace is fired with gaseous fuel at a rate 0.03 lb. fuel / lb. air (NHV 13,500 Btu/ lb.). The tubes are arranged in two rows and are 5 inch OD, 40 ft. length and 20D spacing while the heat rate 4500 Btu / hr. of projected are is recommended. Calculate: 1- Amount of heat adsorbed in radiation section. 2- Amount of heat adsorbed in convection section. Assume % heat wall losses =5% and % heat stack losses =12%.
Transcribed Image Text:A// A furnace is to be designed for heat duty 4,500,000 Btu / hr. and efficiency 40 %, the furnace is fired with gaseous fuel at a rate 0.03 lb. fuel / lb. air (NHV 13,500 Btu/ lb.). The tubes are arranged in two rows and are 5 inch OD, 40 ft. length and 20D spacing while the heat rate 4500 Btu / hr. of projected are is recommended. Calculate: 1- Amount of heat adsorbed in radiation section. 2- Amount of heat adsorbed in convection section. Assume % heat wall losses =5% and % heat stack losses =12%.
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