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Homework 5 Solution ME 113 Spring 2011

# Homework 5 Solution ME 113 Spring 2011 - Homework...

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Homework Assignment 5 Due March 3 2:00 The first two problems must be done using EES. These will be graded separately and are worth more than the others. (You may solve the other problems with EES as well, but you don’t have to.) 1. {HW 5 Problem 1} P1=8000 T1=500 mdot=3 {kg/s} P2=20 Power=2500 {kW} Q=0 Q-Power=mdot*(hexit-hinlet) hinlet=enthalpy(steam, P=P1, T=T1) Texit=temperature(steam, h=hexit, P=P2) Variables in Main hexit=2565 hinlet=3399 mdot=3 P1=8000 P2=20 Power=2500 Q=0 T1=500 Texit=60.05 degrees C

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2 . Note that “wet vapor” means a saturated mixture. Ignore the “see Chap. 3” comment. {ME 113 Homework Problem 2} Qdot-Wdot=mexit*hexit-m1*h1-m2*h2-m3*h3 Qdot=0 Wdot=0 m1=50 {kg/s} m2=40 {kg/s} m3=20 {kg/s} mexit=m1+m2+m3 P=5000 {kPa} h1=enthalpy(steam, P=P, x=0.6) h2=enthalpy(steam, P=P, T=300) h3=enthalpy(steam, P=P, T=600) {you could use water for the substance description instead of steam}
qualityexit=quality(steam, P=P, h=hexit) Variables in Main h1=2138 h2=2924 h3=3666

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Homework 5 Solution ME 113 Spring 2011 - Homework...

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