Answered: At 3.45MPA T/°C H, kJ/kg S, kJ/kgK 38…

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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Methane gas is compressed at the rate of 3x104 m3/hr (as measured at 0.1013MPa and 15°C) from 0.69MPa and 26.7°C to 3.45MPa. The compressor operates adiabatically and has an efficiency of 80% compared with isentropic compression. After compression the methane is cooled at a constant pressure of 3.45MPa to a temperature of 38°C. What is the power requirement of the compressor and what is the rate of heat removal in the cooler?
Data from Methane
At 0.69MPa and 26.7°C: H=946.7kJ/kg, S = 6.071kJ/kgK

At 3.45MPA
T/°C
H, kJ/kg
S, kJ/kgK
38
949.6
5.264
150
1236.7
6.041
155
1250.3
6.075
160
1263.9
6.108
165
1277.5
6.139
170
1291.1
6.169
175
1304.8
6.199
180
1318.4
6.227
185
1332
6.253

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