Meen 315- Lecture 2

Meen 315- Lecture 2 - Lecture#02-Sections 1.41.7 1 Meeting...

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1 Lecture #02--Sections 1.4–1.7 5-4—5-5 Heat exchangers, transient flow Oct 8 W 14 5-4 Nozzles, diffusers, turbines, compressors, heat exch. Oct 6 M 13 Optional review in class Exam 1, Thurs, 10/2, 7-9 p.m., location TBA Oct 1 W 12 5-2—5-3 Flow work, steady-flow systems Sept 29 M 11 5-1 Conservation of mass Sept 24 W 10 4-2—4-5 Energy balance, spec. heats, internal energy, enthalpy Sept 22 M 9 3-6—3-8, EES, 4-1 Property equations (of state), boundary work Sept 17 W 8 3-5 Property data Sept 15 M 7 2-6—2-8, 3-1—3-4; Notes 1 st Law, efficiency, phases, phase changes; communicating references Sept 10 W 6 2-3—2-6; Notes Heat, work, first law of thermodynamics; communicating abstracts Sept 8 M 5 2-1—2-5; Notes Intro to EES, energy, heat, work; communicating tables and figures Sept 3 W 4 1-8—1-12; Notes Temperature, pressure; communicating equations Sept 1 M 3 1-4—1-7 Properties, states, equilibrium, processes Aug 27 W 2 1-1—1-3 Introduction, conservation of energy, dimensions and units, problem solving, systems Aug 25 M 1 Read Subject Date Day Meeting B A S I C st L a w : E n e r g y
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THREE IMPORTANT EQUATIONS Mass Conservation (Chap 1 and 5): First Law or Energy Conservation(Chap 4 and 5) •E cv = U+KE+PE, Second Law or Entropy Balance Equation (Not in Text) cv e exit e e i inlet i i j j b j cv s m s m T Q dt dS σ ± ± ± ± + + = = = , + + Σ + + Σ + = e e e e i i i i cv cv CV gz h m gz h m W Q dt dE 2 V 2 V 2 2 cv ie i inlet e exit dm mm dt == =− ∑∑ ±± 4 HOMEWORK ASSIGNMENT # 1: Due Date : Sep 3 Wed, individual •Problems 8E, 21C, 39E,59, 66, 71 •Additional Problem: Blood has a density of 1060 kg/m 3 . a) What is the specific gravity of blood? b) If total blood volume in human body is 4.6 L for 70 kg Human, calculate total mass in kg ; c) If blood flow rate is 5.5 L per minute, what is the flow rate in kg/s? Best pictures- internet-2007 Awards; Best “Human landscape”
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5 Sections in Chapter 1 A: INTRODUCTION, UNITS, Properties 1.1 Thermodynamics and Energy 1.2 Dimensions and Units 1.3 Systems : Closed and Open 1.4. Properties 1.5 Density, spec Gravity 1.6 State 1.7 Processes, Cycles 1.8. T, Zeroth law B: Pressure 1.9. Pressure 1.10 Manometer 1.11 Atm Press 1.12 Problem Solving 6 1.4 Properties Definitions • The special term property replaces dimension in our parlance. • Property --A characteristic of a system to which numerical values and units can be assigned to describe the system. • State --Condition of a system defined by its properties.
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7 TEAMPLAY • What are some properties that define the state of the liquid in the previous Coke example of a system? 8 Definitions • Extensive properties --properties which can be counted, and for which their value for the whole system is the sum of the value for subsystems into which the overall system might be divided.
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This note was uploaded on 07/28/2010 for the course MEEN 315 taught by Professor Ramussen during the Fall '07 term at Texas A&M.

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Meen 315- Lecture 2 - Lecture#02-Sections 1.41.7 1 Meeting...

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