Question

A steam power plant is operating on the ideal Rankine cycle. Steam enters the turbine at 90 bar and 550°C and is condensed in the condenser at a pressure of 1.3 bar. a. Using the steam tables provided, state: The specific enthalpy of the superheated steam at 90 bar and 550°C. The specific entropy of the superheated steam at 90 bar and 550°C. iii) The specific enthalpy and specific density of the saturated water at 1.3 bar. iv) The specific vaporisation enthalpy of the saturated water at 1.3 bar. The specific vaporisation entropy and the specific entropy of the saturated fluid of the water at 1.3 bar. [5] b. Draw a block diagram schematic of the cycle and draw the cycle on temperature-entropy axes. [5]

Answer 1

ca) do specific enthalpy of super heated steam at ao bas 550°C hi= 3512 KJ/kg (i) Specific entropy of supor heated steam at ao boa, 5500 S; = 6.8164 kJ/kg ui, specific enthalpy and specific density of saturated water at 1.36a. hf = 448.914 Kalkg ff - doce = 953.288 kg/m3 0.001049 Que specific vapoum'sation enthalpy of saturated water at 1.3 how nfg - 2237.68KJ/kg u Specifc vapouri sanch entupy and speútic enroups of saturated fluid at 1.3bal, Sfo -5.88588 kJ/kgk, Sf = 1.380 6 kg kg k Turbine gobah Ssobe I o Whout Boiler 1-3601 9 Yout condensar gobar. pump Wpm

556 qobar 1-3 box.