A stream of methane(CH4, Cp=4R) flowing at 3.0 kmol/min is isobarically heated in a well‑insulated heat exchanger from 30.00 ∘C to 1.50×102 ∘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. 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?

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A stream of methane(CH4, Cp=4R) flowing at 3.0 kmol/min is isobarically heated in a well‑insulated heat exchanger from 30.00 ∘C to 1.50×102 ∘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.

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?

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