The answers should be same that in below. I need complete answers. Steam in supp

Question

The answers should be same that in below. I need complete answers.

Steam in supplied to a two-stage turbine at 40 bar and 350 degree C. It expands in the first turbine until it is just dry saturated, then it is reheated to 350 degree C and expanded through the second-stage turbine. The condenser presser in 0.035 bar. calculate the work output and the heat supplied per kg of steam for the plant, assuming idea processes and neglecting the feed pump term. Calculated also the specific steam consumption and the cycle efficiency. (120 kj; 3362 kj; 2.79 kg/k wh; 38.4%)

Explanation / Answer

Refer http://www.waterproperties.eu for data and interpolation P1 = 40 bar T1 = 350 deg Celsius h1 = 3093.08 kJ/kg s1 = 6.5838 kJ/kgK x2 =1 s2 = 6.5838 kJ/kgK T2 = 180 deg Celsius h2 = 2777.07 kJ/kg (Thro interpolation) P2 = 10.02700 bar P3 = 10.02700 bar T3 = 350 deg Celsius h3 = 3157.65 kJ/kg s3 = 7.3005 kJ/kgK P4 = 0.035 bar s4 = 7.3005 kJ/kgK h4 = 2183.56 kJ/kg P5 = 0.035 bar x5 = 0 (condenser exit) h5 = 111.84 kJ/kg Neglect Pump Work therefore Q (boiler ) = (3093.08 - 111.84) + (3157.65-2777.07) = 3361.82 kJ/kg W (turb) = (3093.08 - 2777.07) + (3157.65 - 2183.56) = 1290.1 kJ/kg Eff = 1290.1/3361.82 = 0.38375 Spec. Steam Consumption = 3600/Work = 3600/1290.1 = 2.7904 kg/kWhr

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