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EGR 334 Thermodynamics Chapter 4: Review

EGR 334 Thermodynamics Chapter 4: Review. Lecture 19: Integrated Systems and System Analysis. Quiz Today?. Today’s main concepts:. Review of Mass balance equation Review of Continuity equation Review of Energy balance equation Review of Control Volume applications.

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EGR 334 Thermodynamics Chapter 4: Review

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  1. EGR 334 ThermodynamicsChapter 4: Review Lecture 19: Integrated Systems and System Analysis Quiz Today?

  2. Today’s main concepts: Review of Mass balance equation Review of Continuity equation Review of Energy balance equation Review of Control Volume applications Reading Assignment: • Read Chapter 5, All Sections • Come prepared to participate in a classroom discussion. Homework Assignment: Problems from Chap 4: 94, 100, 106

  3. Terms for Chap 5 Class Discussion : • Spontaneous Heat Transfer • Clausius Statement • Kelvin-Planck Statement • Entropy Statement • Irreversible vs. Reversible • Internally Reversible Process • Carnot Corollaries • Carnot Efficiency • Max. heat pump efficiency • Max. refrigeration cycle COP • Carnot Cycle • Clausius Inequality You may want to create a summary sheet to help you discuss each of the concepts.

  4. Review: For a Control Volume: Mass Rate Balance: Energy Rate Balance:

  5. Review: For a Control Volume: Mass Rate Balance: SS Energy Rate Balance: SS

  6. Simplified CV Models: Throttling Valve Nozzles Diffuser Pump Turbine Compressor

  7. Control Volume Applications: Direct Contact Heat Exchanger Tube Heat Exchanger Boiler Mass balance: Mass balance: Energy balance: Energy balance:

  8. 1. Condenser Integrated Systems: Power Plant Cycle Refrigeration Cycle • QCV 2. Throttling valve/ Expander 4. Compressor 3. Evaporator • WCV • QCV

  9. A residential air conditioning system operates at steady state. Refrigerant-22 circulates through the components of the system. Property data at key locations are given on the figure. If the evaporator removes energy by heat transfer from the room air at a rate of 600 Btu/min, determine a) the rate of heat transfer between the compressor and the surroundings in Btu/min b) the rate of heat released to the outside air c) the coefficient of performance. Workout Problem 1:

  10. end of Lecture 19 Slides

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