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Review for Exam 3

Review for Exam 3. Exam Information. 50-minutes (strictly enforced) Resources allowed The blue properties booklet You can write anything you want in the white space of this booklet.

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Review for Exam 3

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  1. Review for Exam 3

  2. Exam Information • 50-minutes (strictly enforced) • Resources allowed • The blue properties booklet • You can write anything you want in the white space of this booklet. • NO photocopies, no taping, pasting, photocopies, or loose papers • A handheld calculator • No other electronic devices may be used including cell phones, computers, tablets, music players, etc.

  3. Exam Information • A table of conversion factors will be provided • NO interpolation should be necessary • Material covered • Allassigned reading to date • All in-class lecture material to date • All in-class problem solutions to date • All homework assignments to date

  4. Do you know ... • How to model device efficiency for the following devices? • Pumps • Compressors • Turbines • How to determine closed system entropy production? • How to determine entropy production for the following open system devices? • Boiler, Condenser, Compressor, Turbine, and Valves • How to analyze vapor power cycles? • Determine energy transfer rates (heat and work transfer) associated with each component • Pumps, Boilers, Turbines, Condensers, and FeedwaterHeaters • Determine cycle performance parameters • Thermal efficiency, Heat rate, Back work ratio • Represent cycle on Pv and Ts diagrams • How to analyze vapor power cycles that have been modified to increase thermal efficiency? • Reheat cycles • Regenerative cycles

  5. Do you know ... • How to analyze gas-turbine based power cycles? • Determine energy transfer rates (heat and work transfer) associated with each component • Compressors, Turbines, and Heat Exchangers • Use EES as well as the air tables for these calculation • Determine performance parameters • Thermal efficiency, Back work ratio • Represent these cycles on Pv and Tsdiagrams • How to determine performance parameters for a jet engine? • Propulsive force (engine thrust) • Propulsive power • Propulsive efficiency

  6. Do you know ... • How to analyze internal combustion engine models? • Spark Ignition (Otto Cycle) • Compression Ignition (Diesel Cycle) • Represent these cycles on Pv and Ts diagrams • Determine work transfer, heat transfer, and change ininternal energy for the following processes? • Compression, Heat Addition, Expansion, and Heat Rejection • Determine performance parameters • Thermal efficiency, mean effective pressure • Estimate power output given rotational speed and engine type • How to analyze vapor compression refrigeration cycles? • Determine energy transfer rates for each component • Evaporator, Compressor, Condenser, and Throttling Valve • Represent these cycles on Ph diagrams • Determine performance parameters • COPC for a refrigeration cycle • COPH for a heat pump cycle

  7. Do you know ... • Know the refrigeration jargon? • SET – saturated evaporating temperature • SCT – saturated condensing temperature • DSH – degrees of superheat • DSC – degrees of subcooling • Refrigeration effect • Refrigeration capacity • How to determine the properties of mixtures of ideal gases? • Molar Mass, gas constant, heat capacity ratio • PvT behavior, internal energy, enthalpy, entropy • How to convert between mixture mass fraction and mixture mole fraction? • How to use Dalton’s Law of Partial Pressures?

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