ch03 - Chapter 3: Evaluating Properties Property Relations...

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Chapter 3: Evaluating Properties Property Relations in Engineering Thermodynamics
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The State Principle Two independent, intensive, thermodynamic properties are required to fix the state of a simple compressible system. For example: P and v T and u x and h Intensive thermodynamic properties: Less used: g - Gibbs free energy a - Helmholz free energy v – specific volume T – absolute temperature P –absolute pressure s –specific entropy x – quality (steam only) u – specific internal energy h – specific enthalpy
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P-v-T Relation Note the location of the following: - Single phase regions - Two phase regions - Saturation states - Triple line - Critical Point
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T-v diagram
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Phase Changes Constant Pressure phase change of water: a) Subcooled or Compressed Liquid b) Two-phase liquid-vapor mixture (steam) c) Superheated vapor
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Vapor and Liquid Tables For Water : Superheated vapor properties in Tables A-4, A-4E Compressed liquid properties in Tables A-5, A-5E
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Linear Interpolation: Between values in the tables LL HL
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This note was uploaded on 04/11/2009 for the course MAE 105a taught by Professor Marner during the Fall '08 term at UCLA.

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ch03 - Chapter 3: Evaluating Properties Property Relations...

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