Lecture07_Energy_balance_for_closed_systems-handout2

Lecture07_Energy_balance_for_closed_systems-handout2 -...

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1 Professor: Euiwon Bae Lecture Hours : MWF 1:30-2:20 in ME1130 Office Hours : MWF 2:30-3:30 in ME15 Email : ebae@purdue.edu Phone : 765-494-4762 Course website : http://engineering.purdue.edu/ME200 ME200 : Thermodynamics I Lecture 7 : Energy balance for closed system
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2 Outline Energy balance for closed system Examples
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3 Systems- Lecture 01 Closed system (or Control Mass) Open system (or Control Volume) Energy Transfer(O) Mass Transfer (X) Gas Mixture Mass Transfer (O) Energy Transfer(O)
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4 Systems- Lecture 01 System System - subject of analysis what we want to study Surroundings – external to the system Boundary - limiting area; dividing line between two Surroundings boundary
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5 Thermodynamics (science of energy)-- Lecture 01 1 st Law of Thermodynamics (Chapter 2) Increase in internal energy of a system = heat supplied to the system - work done by the system 2 nd Law of Thermodynamics (Chapter 5) Entropy of an isolated system never decreases E in E out E out -E in
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6 Work- Lecture 05 - Energy transfer, (for mechanical energy to kinetic or potential), which is related with force [F] acting though a distance [m] - Pathway & Process dependent - Not a property F=pA 1 2 P 1 Pathway Dependent V 2 ?? =F ds = pA dx =p dV ° = ?±??± ²2 ²1 ³±?´ = ³´ ²2 ²1
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Lecture07_Energy_balance_for_closed_systems-handout2 -...

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