It is desired to cool a methanol body with a temperature of 95 0C by using cooling water in a two-tube pass heat exchanger.Water enters the pipes at a temperature of 25 0C. The pipes through which the water flows are copper-nickel pipes with an inner diameter of 16 mm, an outer diameter of 20 mm and a length of 4.83 m. The flow rate of methanol is 2.26 kg / s, and that of water is 0.15 kg / s. The equivalent diameter (hydraulic diameter) in the part where methanol flows can be taken as 14.4 mm. Since the heat transfer surface area is 278 m 2, the exit temperatures and heat transfer of both fluids; a) Using the effectiveness-NTU methods b) Calculate using the average logarithmic temperature (LMTD) difference method.
It is desired to cool a methanol body with a temperature of 95 0C by using cooling water in a two-tube pass heat exchanger.Water enters the pipes at a temperature of 25 0C. The pipes through which the water flows are copper-nickel pipes with an inner diameter of 16 mm, an outer diameter of 20 mm and a length of 4.83 m. The flow rate of methanol is 2.26 kg / s, and that of water is 0.15 kg / s. The equivalent diameter (hydraulic diameter) in the part where methanol flows can be taken as 14.4 mm. Since the heat transfer surface area is 278 m 2, the exit temperatures and heat transfer of both fluids; a) Using the effectiveness-NTU methods b) Calculate using the average logarithmic temperature (LMTD) difference method.
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 desired to cool a methanol body with a temperature of 95 0C by using cooling water in a two-tube pass heat exchanger.Water enters the pipes at a temperature of 25 0C. The pipes through which the water flows are copper-nickel pipes with an inner diameter of 16 mm, an outer diameter of 20 mm and a length of 4.83 m. The flow rate of methanol is 2.26 kg / s, and that of water is 0.15 kg / s. The equivalent diameter (hydraulic diameter) in the part where methanol flows can be taken as 14.4 mm. Since the heat transfer surface area is 278 m 2, the exit temperatures and heat transfer of both fluids;
a) Using the effectiveness-NTU methods
b) Calculate using the average logarithmic temperature (LMTD) difference method.
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