ME200 - Lecture 16

ME200 - Lecture 16 - EnergyBalance OpenSystem ME200...

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9/30/2010 1 Energy Balance Energy Balance – Open System Open System ME 200 Thermodynamics I L 16 Purdue University , Dr. Tim Pourpoint – [email protected] Lecture 16 October 1 st , 2010 Last Lecture • Definition of mass flow rate and volume flow rate • Flow energy associated with mass movement into or out of the system • Total energy of flowing fluid ME 200 2
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9/30/2010 2 • Power Plant Example – Many of the components are open – Treated at steady state – We’ll be considering many of these components Today: 1st Today: 1st Law Law Open Systems We ll be considering many of these components ME 200 3 • Consider mass, work, and heat entering and/or leaving a control volume during a certain time, t Energy Conservation for Open Systems • Then, for this process (over a finite time) What do each of these terms represent? ME 200 4 For each inlet
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9/30/2010 3 Now, the Rate Form ME 200 5 • The mass of the CV is constant over time (SF) • The state of the CV is constant over time (SS) Steady Flow, Steady State (SSSF) ME 200 6
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