# Exam4 - reheat using refrigerant-134a as the working fluid...

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Spring 2006 ME 201 Thermodynamics Exam #4 Open Book, Open Notes Problem 1 Often in an ideal jet propulsion cycle a second burner is used after the turbine, as shown in the figure. Consider the following operating conditions: Inlet conditions for the turbine: 900 kPa and 1800 K Required turbine work output: 270.13 kJ/kg Exit temperature of the second burner: 2000 K Nozzle exit pressure: 59.31 kPa Determine a.) Pressure of the second burner b.) Exit velocity of the nozzle Problem 2 For the international space station it is proposed to use an ideal Rankine cycle with

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Unformatted text preview: reheat using refrigerant-134a as the working fluid. Using the table below, determine a.) exit temperature of the reheater b.) plant thermal efficiency Node T( ° C) P(MPa) phase h(kJ/kg) s(kJ/kg ⋅ K) 1 50 1.2 sup.vap. 278 0.93 2 0.24 3 0.24 sup.vap. 4-26 0.1 sat.vap. 234 0.95 5-26 0.1 sat.liq. 17 0.072 6-26 1.4 sub.liq. 18 0.072 1 ME 201 Thermodynamics Spring 2006 Figures for Exam #4 Problem 1 Problem 2 2 Boiler Turb #1 Turb #2 Condenser Pump Reheat Leg Burner #2 Turbine Nozzle 1 2 4 3 2 4 6 3 5 1...
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Exam4 - reheat using refrigerant-134a as the working fluid...

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