Benzene vapor is being condensed at 340 K on the outside of pipes of a 1-2 shell-and-tube heat exchanger. Inside of pipes water flows at 0.7 m/s; its inlet temperature being 280 K. The inner and outer diameters of the pipes are 16 mm and 20 mm, respectively. If the heat transfer coefficients of the vapor and water sides are 1480 and 3150 W/m2K, respectively, and it is required to condense 0.030 kg/s of vapor on each of the pipes,a) how long should the pipes per pass be,b) what will be the outlet temperature of water?c) calculate the number of pipes per pass if it is desired to heat 27,000 kg/h of water from 280K to the outlet temperature calculated in (b).d) calculate the total heat transfer through the heat exchanger.The latent heat of condensation is 300 kJ/kg. Neglect any resistance to heat transfer in the pipe walls. You can take Cp,water: 4.18 kJ/kg K; rwater: 1000 kg/m3 (The questions should be resolved in accordance with the notation in the book "Geankoplis, C.J., Transport Processes and Separation Process Principles".)

density of water(rwater)=1000kg/m3Cpwater=4180J/kg.Klatent heat of…

Answered: Benzene vapor is being condensed at 340…

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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Benzene vapor is being condensed at 340 K on the outside of pipes of a 1-2 shell-and-tube heat exchanger. Inside of pipes water flows at 0.7 m/s; its inlet temperature being 280 K. The inner and outer diameters of the pipes are 16 mm and 20 mm, respectively. If the heat transfer coefficients of the vapor and water sides are 1480 and 3150 W/m²K, respectively, and it is required to condense 0.030 kg/s of vapor on each of the pipes,

a) how long should the pipes per pass be,
b) what will be the outlet temperature of water?
c) calculate the number of pipes per pass if it is desired to heat 27,000 kg/h of water from 280K to the outlet temperature calculated in (b).
d) calculate the total heat transfer through the heat exchanger.

The latent heat of condensation is 300 kJ/kg. Neglect any resistance to heat transfer in the pipe walls. You can take C_p,water: 4.18 kJ/kg K; r_water: 1000 kg/m³(The questions should be resolved in accordance with the notation in the book "Geankoplis, C.J., Transport Processes and Separation Process Principles".)

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