You wish to insulate a freezer room with the material in problem 3. The temperature difference between inside and out is 70K. You want a heat loss of only 15 w/m2. How thick should the walls be? And is this reasonable to build? 3) Determination of Thermal Conductlvity: You are testIng a flat slab of a new material which Is2.5 cm thick. The temperatures on each side of the material are 318.4K and 303.2K, andthe heat flux through it is measured at 35.1 W/m2. What is the thermal conductivity of thematerial in W/mK?318.4K -303.2K 15.2K35.1W35.1Wk0.025mW0.0577mK15.2KA0.025m15.2K2.5cm1m= 0.025m1100cm

Heat is energy in transfer to or from a thermodynamic system, by mechanisms other than thermodynamic…

Answered: You wish to insulate a freezer room…

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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You wish to insulate a freezer room with the material in problem 3. The temperature difference between inside and out is 70K. You want a heat loss of only 15 w/m2. How thick should the walls be? And is this reasonable to build?

3) Determination of Thermal Conductlvity: You are testIng a flat slab of a new material which Is
2.5 cm thick. The temperatures on each side of the material are 318.4K and 303.2K, and
the heat flux through it is measured at 35.1 W/m2. What is the thermal conductivity of the
material in W/mK?
318.4K -303.2K 15.2K
35.1W
35.1W
k
0.025m
W
0.0577
mK
15.2K
A
0.025m
15.2K
2.5cm
1m
= 0.025m
1
100cm

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