Problem 700°C 160°C Inside and outside layer of a furnace wall are constructed of 11.5 cm of non corrosive quiged NCB CB quie brick and 22 cm of clay brick, the thermal conductivity of both being unknown. Inner and outer temperature of the wall are 700°C and 160°C respectively. To save the heat loss the furnace is lagged with 5 cm of mineral wool(k = 0.525 kcal/hr. cm°C). 11.5 cm The temperature at various points at lagged conditions are shown in figure below. Find the % of heat loss saved by lagging. 700°C 650°C 51S°C 80°C NCB CB MW % heat loss by saving ki qunlagged – 9tagged x 100 qunlagged 11.5 cm
Problem 700°C 160°C Inside and outside layer of a furnace wall are constructed of 11.5 cm of non corrosive quiged NCB CB quie brick and 22 cm of clay brick, the thermal conductivity of both being unknown. Inner and outer temperature of the wall are 700°C and 160°C respectively. To save the heat loss the furnace is lagged with 5 cm of mineral wool(k = 0.525 kcal/hr. cm°C). 11.5 cm The temperature at various points at lagged conditions are shown in figure below. Find the % of heat loss saved by lagging. 700°C 650°C 51S°C 80°C NCB CB MW % heat loss by saving ki qunlagged – 9tagged x 100 qunlagged 11.5 cm
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
Related questions
Question

Transcribed Image Text:Problem
700°C
160°C
Inside and outside layer of a furnace wall
are constructed of 11.5 cm of non corrosive
qunlagged
NCB
CB
qunlagged
brick and 22 cm of clay brick, the thermal
conductivity of both being unknown. Inner
and outer temperature of the wall are 700°C
and 160°C respectively. To save the heat
loss the furnace is lagged with 5 cm of
I1.5 em
22 cm
mineral wool(k = 0.525 kcal/hr. cm°C).
The temperature at various points at lagged
conditions are shown in figure below. Find
the % of heat loss saved by lagging.
700°C
650°C
515°C 80°C
qlagged
NCB
CB
qlagged
% heat loss by saving
qunlagged – 9tagged
x 100
qunlagged
22 cm
11.5 cm
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