Q2: - Saturated steam at 300 °C (p =0.38 Kg/m') is used to heat a counter currently flowing stream of methanol vapor from 65 °C to 260 °C in an adiabatic heat exchanger. The flow rate of the methanol is 5500 liters per minute at latm (ideal gas), and the steam condenses and leaves the heat exchanger as liquid water at 90 °C. (a) Calculate the required flow rate of the entering steam in m' /min. (b) Calculate the rate of heat transfer from the water to the methanol in (KJ). Methanol vapor in at T=65°C Saturated steam at 300 °C Liquid water at 90 Heat Exchanaer Methanol vapor out at T=260°C Relations and data: Cpmethanol = 42.93 +0.08301T (J/Kmol. C), R = 0.08206 atm. liter /gmol. K, Cp team= 5.980 KJ/Kg. K, Cpm 0of liquid water 4.205 KJ/Kg. K, Awater-2257 KJ/Kg R= 8.314 atm. m/mol. K, (P3DP Mwt/RT).
Q2: - Saturated steam at 300 °C (p =0.38 Kg/m') is used to heat a counter currently flowing stream of methanol vapor from 65 °C to 260 °C in an adiabatic heat exchanger. The flow rate of the methanol is 5500 liters per minute at latm (ideal gas), and the steam condenses and leaves the heat exchanger as liquid water at 90 °C. (a) Calculate the required flow rate of the entering steam in m' /min. (b) Calculate the rate of heat transfer from the water to the methanol in (KJ). Methanol vapor in at T=65°C Saturated steam at 300 °C Liquid water at 90 Heat Exchanaer Methanol vapor out at T=260°C Relations and data: Cpmethanol = 42.93 +0.08301T (J/Kmol. C), R = 0.08206 atm. liter /gmol. K, Cp team= 5.980 KJ/Kg. K, Cpm 0of liquid water 4.205 KJ/Kg. K, Awater-2257 KJ/Kg R= 8.314 atm. m/mol. K, (P3DP Mwt/RT).
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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Transcribed Image Text:Q2: - Saturated steam at 300 °C (p = 0.38 Kg/m') is used to heat a counter currently flowing stream of
methanol vapor from 65 °C to 260 °C in an adiabatic heat exchanger. The flow rate of the methanol is
5500 liters per minute at latm (ideal gas), and the steam condenses and leaves the heat exchanger as
liquid water at 90 °C.
(a) Calculate the required flow rate of the entering steam in m' /min.
(b) Calculate the rate of heat transfer from the water to the methanol in (KJ).
Methanol vapor in at T=65°C
Saturated steam at 300 °C
Liquid water at 90
Heat Exchanaer
Methanol vapor out at T-260°C
Relations and data:
Cpmethanol = 42.93 + 0.08301T (J/Kmol. C), R = 0.08206 atm. liter /gmol. K,
Cp ream = 5.980 KJ/Kg. K, Cpm of liquid water=4.205 KJ/Kg. K, Awater-2257 KJ/Kg
R= 8.314 atm. m/mol. K, (p=P Mwt/RT).
Transcribed Image Text:Q1: - Saturated steam at a gauge pressure of 2.0 atm and T=120°C is to be used to heat a stream of
ethane. The steam condenses and leaves the exchanger as a liquid at 27°C. The ethane (C:H6) enters a
heat exchanger at 16°C and 1.5 atm gauge at a rate of 795 m/min and leaves at 93°C. The specific
enthalpy of ethane at the given pressure is 941 kJ/kg and 1073 kJ/kg at 16 °C and 93°C, respectively.
(a) How much energy (KW) must be transferred to ethane in this process?
(b) At what rate in m'/s must steam be supplied to the exchanger?
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