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ompressed polytropically at n=1.45 until the specific volume is 10 times lower than that at (state 2). Then 84552.2 J/kg of heat added at constant specific volume (state 3). Afte eat is added at constant pressure until entropy is 333.333 J/(kg.K) (state 4). In the next pr dengoon icontropic expansion (and reaches state 5). Finally there is a con

ompressed polytropically at n=1.45 until the specific volume is 10 times lower than that at (state 2). Then 84552.2 J/kg of heat added at constant specific volume (state 3). Afte eat is added at constant pressure until entropy is 333.333 J/(kg.K) (state 4). In the next pr dengoon icontropic expansion (and reaches state 5). Finally there is a con

Introduction to Chemical Engineering Thermodynamics
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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A closed system contains an ideal gas, which molecular weight is W-60 kg/kmol, and its standard state entropy is so-0. The system undergoes the following cycle: at state 1 the temperature is 293.15 K, the pressure is 94 kPa, and the entropy is 45.428 J/(kg.K). The gas is compressed polytropically at n=1.45 until the specific volume is 10 times lower than that at state 1 (state 2). Then 84552.2 J/kg of heat is added at constant specific volume (state 3). After that heat is added at constant pressure until entropy is 333.333 J/(kg.K) (state 4). In the next process the system undergoes isentropic expansion (and reaches state 5). Finally there is a constant volume rejection of heat (until state 1). Determine a) the values of p, v, T and s, at each cycle point; b) the p-V and T-s diagrams of the cycle; c) the heat added to the system; d) the heat rejected by the system; e) the cycle net work; f) the mean effective pressure, g) the cycle thermal efficiency.
Transcribed Image Text:A closed system contains an ideal gas, which molecular weight is W-60 kg/kmol, and its standard state entropy is so-0. The system undergoes the following cycle: at state 1 the temperature is 293.15 K, the pressure is 94 kPa, and the entropy is 45.428 J/(kg.K). The gas is compressed polytropically at n=1.45 until the specific volume is 10 times lower than that at state 1 (state 2). Then 84552.2 J/kg of heat is added at constant specific volume (state 3). After that heat is added at constant pressure until entropy is 333.333 J/(kg.K) (state 4). In the next process the system undergoes isentropic expansion (and reaches state 5). Finally there is a constant volume rejection of heat (until state 1). Determine a) the values of p, v, T and s, at each cycle point; b) the p-V and T-s diagrams of the cycle; c) the heat added to the system; d) the heat rejected by the system; e) the cycle net work; f) the mean effective pressure, g) the cycle thermal efficiency.
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