A stream of methane (CH4, Cp = 4R) flowing at 3.0 kmol/min is isobarically heated in a well-insulated heat exchanger from 20.00 °C to 1.60 × 10² C. The second side of the exchanger is fed with saturated water vapor, which is isobarically cooled to a saturated liquid when it leaves. As unit operator, you have the choice of feeding high-pressure steam (HPS) at 4.00 MPa or medium pressure steam (MPS) at 1.00 MPa. Assume Tsurr = 27 °C. Find the mass flow rate of water and lost work if high pressure steam (HPS) is used. mass flow rate: kg/s lost work: kW

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
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A stream of methane (CH4, ??=4?)(CH4, Cp=4R) flowing at 3.0 kmol/min3.0 kmol/min is isobarically heated in a well‑insulated heat exchanger from 20.00 ∘C20.00 ∘C to 1.60×102 ∘C.1.60×102 ∘C. The second side of the exchanger is fed with saturated water vapor, which is isobarically cooled to a saturated liquid when it leaves. As unit operator, you have the choice of feeding high‑pressure steam (HPS) at 4.00 MPa4.00 MPa or medium pressure steam (MPS) at 1.00 MPa.1.00 MPa. Assume ?surr=27 ∘C.Tsurr=27 ∘C.

Find the mass flow rate of water and lost work if high pressure steam (HPS) is used.

Find the mass flow rate of water and lost work if medium pressure steam (MPS) is used.

 

Macmillan Learning
A stream of methane (CH4, Cp = 4R) flowing at 3.0 kmol/min is isobarically heated in a well-insulated heat exchanger from
20.00 °C to 1.60 × 10² °C. The second side of the exchanger is fed with saturated water vapor, which is isobarically cooled to a
saturated liquid when it leaves. As unit operator, you have the choice of feeding high-pressure steam (HPS) at 4.00 MPa or
medium pressure steam (MPS) at 1.00 MPa. Assume Tsurr = 27 °C.
Find the mass flow rate of water and lost work if high pressure steam (HPS) is used.
mass flow rate:
mass flow rate:
Find the mass flow rate of water and lost work if medium pressure steam (MPS) is used.
Which is the better choice of steam to use?
kg/s
HPS
MPS
lost work:
kg/s
lost work:
kW
kW
Transcribed Image Text:Macmillan Learning A stream of methane (CH4, Cp = 4R) flowing at 3.0 kmol/min is isobarically heated in a well-insulated heat exchanger from 20.00 °C to 1.60 × 10² °C. The second side of the exchanger is fed with saturated water vapor, which is isobarically cooled to a saturated liquid when it leaves. As unit operator, you have the choice of feeding high-pressure steam (HPS) at 4.00 MPa or medium pressure steam (MPS) at 1.00 MPa. Assume Tsurr = 27 °C. Find the mass flow rate of water and lost work if high pressure steam (HPS) is used. mass flow rate: mass flow rate: Find the mass flow rate of water and lost work if medium pressure steam (MPS) is used. Which is the better choice of steam to use? kg/s HPS MPS lost work: kg/s lost work: kW kW
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