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Lecture18_Turbines_compressors_pumps-handout[1]

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Unformatted text preview: 1 Professor: Euiwon Bae Lecture Hours : MWF 1:30-2:20 in ME1130 Office Hours : MWF 2:30-3:30 in ME1091 Email : [email protected] Phone : 765-494-6849 Course website : http://engineering.purdue.edu/ME200 ME200 : Thermodynamics I Lecture 18 :Turbines and compressor pumps 2 Outline Turbines Compressors and Pumps Examples 3 Turbines - Power generation device via fluid passing through blades and rotating the shaft - Ex : Power generation in power plants Gas turbine in power plants jet engines Hydraulic turbine in power plants 4 Modeling -Typical assumption - - - - 5 Modeling 0 = − ? + ? ݅ (? ݅ − ? ? ) + (¡ 2 −¡ 2 ) ¢ + £( − ) Energy balance Mass balance ¤? ¥¦ ¤§ = ¨ ? ݅© ªª − ¨ ? «¬§ = 0 6 Example 1 – steam turbines Steam enters a turbine engine at steady state with T1=800 F and P1=500 lbf/in2. steam leaves the engine with P2=0.8 lbf/in2 with x=0.93. Power of15,000 hp is generated and Q of 2.5x106 Btu/h. Neglecting the KE an PE, determine volumetric flow rate in ft3/h Example 1 – steam turbines...
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