An inventor claims to have built a machine thatoperates as follows:100 kg/min of steam at T = 400°C and P = 5 barenters the machine.100 kg/min of saturated liquid water at 40°Cleaves the machine.50,000 kJ/min of shaft work is produced bythe system. There is no heat exchange withsurroundings.An undisclosed amount of nitrogen enters theprocess at 315 K and 1 bar, and the same amountof nitrogen leaves at 330 K and 1 bar.Kinetic and potential energy of all entering andleaving streams is negligible.This is a steady-state process that can continue asdescribed above indefinitely.Without knowing anything about how the machineworks, what can you say about the feasibility of theinventor’s claim?
An inventor claims to have built a machine thatoperates as follows:100 kg/min of steam at T = 400°C and P = 5 barenters the machine.100 kg/min of saturated liquid water at 40°Cleaves the machine.50,000 kJ/min of shaft work is produced bythe system. There is no heat exchange withsurroundings.An undisclosed amount of nitrogen enters theprocess at 315 K and 1 bar, and the same amountof nitrogen leaves at 330 K and 1 bar.Kinetic and potential energy of all entering andleaving streams is negligible.This is a steady-state process that can continue asdescribed above indefinitely.Without knowing anything about how the machineworks, what can you say about the feasibility of theinventor’s claim?
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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| An inventor claims to have built a machine that operates as follows: 100 kg/min of steam at T = 400°C and P = 5 bar enters the machine. 100 kg/min of saturated liquid water at 40°C leaves the machine. 50,000 kJ/min of shaft work is produced by the system. There is no heat exchange with surroundings. An undisclosed amount of nitrogen enters the process at 315 K and 1 bar, and the same amount of nitrogen leaves at 330 K and 1 bar. Kinetic and potential energy of all entering and leaving streams is negligible. This is a steady-state process that can continue as described above indefinitely. Without knowing anything about how the machine works, what can you say about the feasibility of the inventor’s claim? |
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