Question

Consider a steam power plant operating on the simple ideal Rankine cycle. Steam enters the turbine at 5 MPa and 500°C and is condensed in the condenser at a pressure of 50 kPa. Heat is supplied to the steam in a furnace maintained at 800 K, and waste heat is rejected to the surroundings at 300 K. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the net work output, (b) the thermal efficiency of this cycle, (c) the exergy on associated with each of the four processes and the whole cycle, (d) the second-law efficiency of this cycle, and (e) the exergy of the system at the inlet of the boiler in oiler 5 MPa 5MPa 3) 500°C Wturb,out Wpump,in Pump Turbine 50 kPa Condenser 50 kPa out

Answer 1

Vey haごh, tv, la-T,): 340, 54 t 0.0010ろ(5000-50) ร้า25345.6 KJ1Kg 1 24124 a ニわ4-f に242-24-340.54 out : 2086.1 KJ1Kg a) Nel 、3089 . 1-20 86.1 wmet b) -thermal eH o/ cyche lt24 exeroy aestructiom auriao Process a otream/rornlet to exit tate iven by Sink 300

simk ะ RAろ(1-0912.. 6.9781+2056コ TA 3 ノス Xdes, total:0十589.97t 0+31315 こ90ろ.la KJ1kg 50kPa