gned to trans The inside and outside wall temperatures are to be 2200 ° F and 320 ° F. Determine the most economical arrangement of bricks measuring (9 in x 4; in x 3 in). If they are made from materials one with a k of 0.44 Btu/hr. ft. °F and maximum usable temperature of 1700 ° F and other with a k of 0.94 Btu/hr. ft. F and a maximum usable temperature of 2400 F. Bricks made of each material cost the same amount and may be laid in any manner (but bricks must remain intact, i.e., no partial bricks). After you answer the question, determine the percent increase in heat flux if there are two -in-diameter steel bolts extending through the wall per square foot of wall are. (k of steel = 22 Btu/hr. ft. ° F)|

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.3P: 1.3 A furnace wall is to be constructed of brick having standard dimensions of Two kinds of...
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A furnace wall is to be designed to transmit a maximum heat flux of 220 Btu/hr.ft of wall area.
The inside and outside wall temperatures are to be 2200 • F and 320 ° F. Determine the most
economical arrangement of bricks measuring (9 in x 4; in x 3 in). If they are made from
materials one with ak of 0.44 Btu/hr. ft. ° F and maximum usable temperature of 1700 ° F and
other with a k of 0.94 Btu/hr. ft. ° F and a maximum usable temperature of 2400 ° F. Bricks made
of each material cost the same amount and may be laid in any manner (but bricks must remain
intact, i.e., no partial bricks). After you answer the question, determine the percent increase in
heat flux if there are two -in.-diameter steel bolts extending through the wall per square foot
of wall are. (k of steel = 22 Btu/hr. ft. F)|
Transcribed Image Text:A furnace wall is to be designed to transmit a maximum heat flux of 220 Btu/hr.ft of wall area. The inside and outside wall temperatures are to be 2200 • F and 320 ° F. Determine the most economical arrangement of bricks measuring (9 in x 4; in x 3 in). If they are made from materials one with ak of 0.44 Btu/hr. ft. ° F and maximum usable temperature of 1700 ° F and other with a k of 0.94 Btu/hr. ft. ° F and a maximum usable temperature of 2400 ° F. Bricks made of each material cost the same amount and may be laid in any manner (but bricks must remain intact, i.e., no partial bricks). After you answer the question, determine the percent increase in heat flux if there are two -in.-diameter steel bolts extending through the wall per square foot of wall are. (k of steel = 22 Btu/hr. ft. F)|
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