Exam - 3 Questions on Thermodynamics I with Solutions | ME 20000, Exams of Thermodynamics

Download Exam - 3 Questions on Thermodynamics I with Solutions | ME 20000 and more Exams Thermodynamics in PDF only on Docsity! ME 200 - Thermodynamics I Exam 3, Spring 2002 i. Consider the basic steam power cycle depicted below with the given praperties at each state. The data in the table were obtained from actual cycle performance tests. For the data given, do the following: a) Show the process that the steam undergoes on a T-s diagram with respect to saturation lines. Be sure to depict the correct condition of steam for each state. b) Determine the overall thermal efficiency of the cycle, in percent. c) Determine the isentropic efficiency of the pump. d) Determine the mass flow rate of steam required for a net cycle power output of 50 MW. Assume an adiabatic turbine and negligible kinetic and potential energy changes for all components. State | P (kPa) [“h (kJ/kg) A SSOME? ; , : 1 10 191.8 1 95.5F 4. Adiabatic turbine f pump go rble STIS RES) 2. Ake eApeve 5. water @ state | incompre 4 io | 2616 | 3. y¥,20.0 © “Joe Yor! irene: 0s eee een Oe tate tape Wy = Ag~ hy = 8582.3-226/.6 nn 3107 * 1,920.7 Ri /es G int Ae-hz = 3582. 1, nt Seo USpE = 487L6 bi/eg ' Suse Aht e eer: a —/8.9 AT a — 2.7 = Wy = hy hes (he! 5 wh/-[Wel Whet. _ 1320.7 ~/8-F_ 1901.8 _ pagel (b) te = / ie Po: ‘in 7 "F806 337h6 mn 4 I 2 38.6/ % ME 200 — Thermodynamics I Name: Sow THs Exam 3, Spring 2002 Thermo No.:. (@) _Toleal pump C Adiabatic ,-L7. kev a> Lsentrepc) Table A-3 Wp, = "AP - Ake Lape P= 0,Jbar, X= O-0 Ps Urs UF Lor0r xio 2 mVeg = ~L0n2 x02 (10. -ol)bars 10" bo" 8 barn? (SN 2-15.14 PT fog = $0.1 % : ps = -/5I¢. . =0.%ol Vi ° Ip We “18.9 P - y) Frem (b) Whey = 1590/8 k/as a Mm net ° § kIT 50 xio kW are =m 1308 BOxID 24 38.4 kG s * 13018 S k é i= se ke (2 3042 5 )(125,2% 5)