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e Consider a refrigeration truck traveling at ph at a location where the air temperature is 70. The refrigerated compartment of the truck be considered to be a 9ft-wide, 8ft-high, and -long rectangular box. The refrigeration tem of the truck can provide 3tons of igeration (i.e., it can remove heat at a rate of Btu/min). The outer surface of the truck is ted with a low-emissivity material, and thus iation heat transfer is very small. Determine average temperature of the outer surface of refrigeration compartment of the truck if the igeration system is observed to be operating alf the capacity. Assume the air flow over the ire outer surface to be turbulent and the heat sfer coefficient at the front and rear surfaces pe equal to that on side surfaces. Taking the owing properties for the air (k=0.01481 Btu/h F°, v = 0.1697×1³ ft/s, and Pr =0.729).

e Consider a refrigeration truck traveling at ph at a location where the air temperature is 70. The refrigerated compartment of the truck be considered to be a 9ft-wide, 8ft-high, and -long rectangular box. The refrigeration tem of the truck can provide 3tons of igeration (i.e., it can remove heat at a rate of Btu/min). The outer surface of the truck is ted with a low-emissivity material, and thus iation heat transfer is very small. Determine average temperature of the outer surface of refrigeration compartment of the truck if the igeration system is observed to be operating alf the capacity. Assume the air flow over the ire outer surface to be turbulent and the heat sfer coefficient at the front and rear surfaces pe equal to that on side surfaces. Taking the owing properties for the air (k=0.01481 Btu/h F°, v = 0.1697×1³ ft/s, and Pr =0.729).

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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Consider a refrigeration truck traveling at 55mph at a location where the air temperature is 80F°. The refrigerated compartment of the truck can be considered to be a 9ft-wide, 8ft-high, and 20ft-long rectangular box. The refrigeration system of the truck can provide 3tons of refrigeration (i.e., it can remove heat at a rate of 600Btu/min). The outer surface of the truck is coated with a low-emissivity material, and thus radiation heat transfer is very small. Determine the average temperature of the outer surface of the refrigeration compartment of the truck if the refrigeration system is observed to be operating at half the capacity. Assume the air flow over the entire outer surface to be turbulent and the heat transfer coefficient at the front and rear surfaces to be equal to that on side surfaces. Taking the following properties for the air (k=0.01481 Btu/h ft -F°, v= 0.1697×10° ft/s, and Pr =0.729).
Transcribed Image Text:Consider a refrigeration truck traveling at 55mph at a location where the air temperature is 80F°. The refrigerated compartment of the truck can be considered to be a 9ft-wide, 8ft-high, and 20ft-long rectangular box. The refrigeration system of the truck can provide 3tons of refrigeration (i.e., it can remove heat at a rate of 600Btu/min). The outer surface of the truck is coated with a low-emissivity material, and thus radiation heat transfer is very small. Determine the average temperature of the outer surface of the refrigeration compartment of the truck if the refrigeration system is observed to be operating at half the capacity. Assume the air flow over the entire outer surface to be turbulent and the heat transfer coefficient at the front and rear surfaces to be equal to that on side surfaces. Taking the following properties for the air (k=0.01481 Btu/h ft -F°, v= 0.1697×10° ft/s, and Pr =0.729).
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