lecture15

lecture15 - Prof.Naik 2011 ME 200: Thermodynamics I Lecture...

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1 Prof.Naik © 2011 ME 200: Thermodynamics I Lecture 15: Conservation of Mass, Flow Energy Last Lecture Prof.Naik © 2011 Ideal Gas Properties » Internal energy and enthalpy depend only on temperature »C p –C v = R » Change in internal energy   2 v uC T d T  » Change in enthalpy 1  2 1 p hC T d T
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2 This Lecture Conservation of Mass Prof.Naik © 2011 Flow Energy Mass Flow Rate Amount of mass flowing through a cross section per unit time (kg/s Prof.Naik © 2011 time (kg/s) For most cases of practical interest » One-dimensional flow i.e. properties do not vary over the flow area at each inlet or exi  n A m ρ dA the flow area at each inlet or exit » Velocity and density constant across the cross-section m ρ A
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3 Volume Flow Rate Amount of volume flowing through a cross section per unit time (m 3 /s Prof.Naik © 2011 time (m /s) Mass flow rate and volume flow rate are simply related by specific volume  n A Vd A
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lecture15 - Prof.Naik 2011 ME 200: Thermodynamics I Lecture...

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