It is proposed to condense 15 pounds per sec of saturated Freon-12 vapor in refrigeration system by allowing it to flow on the outside surface of 1-in o.d. copper tubes (18 BWG, 64 tubes). Cooling water enters the tubes at 70oF and leaves the system at 75oF with a velocity of 10 ft/s. Calculate the length of each tube in parallel needed in the system. The following data apply: latent heat of vaporization for Freon-12 at 90oF = 59 BTU/lb, overall coefficient of heat transfer = 240 BTU/ft2-hr-oF. a. 158 b. 3.8 c. 45.6 d. 52.8 e. None of these
It is proposed to condense 15 pounds per sec of saturated Freon-12 vapor in refrigeration system by allowing it to flow on the outside surface of 1-in o.d. copper tubes (18 BWG, 64 tubes). Cooling water enters the tubes at 70oF and leaves the system at 75oF with a velocity of 10 ft/s. Calculate the length of each tube in parallel needed in the system. The following data apply: latent heat of vaporization for Freon-12 at 90oF = 59 BTU/lb, overall coefficient of heat transfer = 240 BTU/ft2-hr-oF. a. 158 b. 3.8 c. 45.6 d. 52.8 e. None of these
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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It is proposed to condense 15 pounds per sec of saturated Freon-12 vapor in refrigeration system by allowing it to flow on the outside surface of 1-in o.d. copper tubes (18 BWG, 64 tubes). Cooling water enters the tubes at 70oF and leaves the system at 75oF with a velocity of 10 ft/s. Calculate the length of each tube in parallel needed in the system. The following data apply: latent heat of vaporization for Freon-12 at 90oF = 59 BTU/lb, overall coefficient of heat transfer = 240 BTU/ft2-hr-oF.
a. 158
b. 3.8
c. 45.6
d. 52.8
e. None of these
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