2. The wall of a cold storage is made of 10cm of cork covered on both sides by 1cm of pine-wood.The outside is lined with a 2mm galvanized steel plate. The inner film coefficient on the outsideis100 W/m2K, what is the amount of heat leaking into the room per m2 of the wall?3. A steam turbine casing is made of a 6mm thick steel plate. At one location it has an inside surfacetemperature of 100°C. The convective heat transfer coefficient on the outside is 10 W/m2K. Theambient temperature is 25°C. What is the outer surface temperature? If the outer surface iscovered with a 3cm layer of insulation (k = 0.04 WmK), will it be safe to touch? Explain. Direction: Answer the following problem, show your complete solution and illustrate the problembefore showing your solutions. Provide a short description/explanation for your answer.1. A common brick wall, 20cm thick, is finished on the inside with 2.5cm of cement concrete.Calculate the total thermal resistance of the wall and the heat transfer rate per m' if the overalltemperature difference is 40 K.2. The wall of a cold storage is made of 10cm of cork covered on both sides by 1cm of pine-wood.The outside is lined with a 2mm galvanized steel plate. The inner film coefficient on the outsideis100 W /m²K, what is the amount of heat leaking into the room per m? of the wall?3. A steam turbine casing is made of a 6mm thick steel plate. At one location it has an inside surfacetemperature of 100°C. The convective heat transfer coefficient on the outside is 10 W /m²K. Theambient temperature is 25°C. What is the outer surface temperature? If the outer surface iscovered with a 3cm layer of insulation (k = 0.04 "), will it be safe to touch? Explain.mK4. Design a counter-flow-oil-cooler to meet the following requirements:Water inlet temperature= 40°CWater outlet temperature= 85°CWater flow rate= 1000 kg/hrOil inlet temperature=150°CSpecific heat of oilk)=1kgKOverall heat transfer coefficient=1000m2KInner diameter of the tubes=6mmFor a single-pass shell and tube heat exchanger find the number of tubes and their length. Thevelocity of water in the tubes is not to exceed 0.2m/s

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Answered: The wall of a cold storage is made of…

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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2. The wall of a cold storage is made of 10cm of cork covered on both sides by 1cm of pine-wood.
The outside is lined with a 2mm galvanized steel plate. The inner film coefficient on the outside
is100 W/m2K, what is the amount of heat leaking into the room per m2 of the wall?
3. A steam turbine casing is made of a 6mm thick steel plate. At one location it has an inside surface
temperature of 100°C. The convective heat transfer coefficient on the outside is 10 W/m2K. The
ambient temperature is 25°C. What is the outer surface temperature? If the outer surface is
covered with a 3cm layer of insulation (k = 0.04 W

mK), will it be safe to touch? Explain.

Direction: Answer the following problem, show your complete solution and illustrate the problem
before showing your solutions. Provide a short description/explanation for your answer.
1. A common brick wall, 20cm thick, is finished on the inside with 2.5cm of cement concrete.
Calculate the total thermal resistance of the wall and the heat transfer rate per m' if the overall
temperature difference is 40 K.
2. The wall of a cold storage is made of 10cm of cork covered on both sides by 1cm of pine-wood.
The outside is lined with a 2mm galvanized steel plate. The inner film coefficient on the outside
is100 W /m²K, what is the amount of heat leaking into the room per m? of the wall?
3. A steam turbine casing is made of a 6mm thick steel plate. At one location it has an inside surface
temperature of 100°C. The convective heat transfer coefficient on the outside is 10 W /m²K. The
ambient temperature is 25°C. What is the outer surface temperature? If the outer surface is
covered with a 3cm layer of insulation (k = 0.04 "), will it be safe to touch? Explain.
mK
4. Design a counter-flow-oil-cooler to meet the following requirements:
Water inlet temperature
= 40°C
Water outlet temperature
= 85°C
Water flow rate
= 1000 kg/hr
Oil inlet temperature
=150°C
Specific heat of oil
k)
=1
kgK
Overall heat transfer coefficient
=1000
m2K
Inner diameter of the tubes
=6mm
For a single-pass shell and tube heat exchanger find the number of tubes and their length. The
velocity of water in the tubes is not to exceed 0.2m/s

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