Lect10ME200Divs2&5PropertyTablesSP2012

Lect10ME200Divs2&5PropertyTablesSP2012 - ME 200:...

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ME 200: Thermodynamics I Lecture 10: Property Tables
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Last Lecture Pure Substance Phase Phase Change Property Diagrams
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This Lecture Enthalpy Property Tables
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Enthalpy Property tables list “enthalpy” ( h ) and “entropy” ( s ) in addition to p , T , v and u More about entropy later in the semester (2 nd Law) Enthalpy: a property defined for simplicity and convenience Total enthalpy: H = U + p Specific enthalpy: h = u + pv Commonly used in open system analysis (control volume)
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Property Tables Thermodynamic relationships sometimes complex; tables provide easy way of listing relevant properties and looking them up during analysis Property information available for compressed liquid, saturated liquid, liquid-vapor mixture, saturated vapor, and superheated vapor for many pure substances Tables A-1 through A-27 (SI units); Tables A-1E through A-25E (USCS units) – very important to understand structure for efficient problem solving!
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Property Tables (contd.) Recall: compressed (sub-cooled) liquid (CL), saturated liquid (SL), saturated liquid-vapor mixture (SLVM), saturated vapor (SV) and superheated vapor (SHV)
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Lect10ME200Divs2&5PropertyTablesSP2012 - ME 200:...

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