RankineCycles_web - ENU 4133 Rankine Cycles April 5, 2010...

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Unformatted text preview: ENU 4133 Rankine Cycles April 5, 2010 Rankine Cycles I Ideal, simple Rankine cycle (SG/boiler, turbine, condenser, pump) I Non-ideal simple Rankine cycle (real turbine, real pump) I Regeneration and moisture separation I Reheat cycles Ideal, Simple Rankine Cycle It is usual to number the thermodynamic states in a system in the direction of flow. Flow splits complicate the numbering. State 1 can be assigned to be any state convenient to starting. Exit conditions of the steam generator usually saturated steam at a given pressure ( P 1 given, x 1 = 1). h 1 = h g ( P 1 ), s 1 = s g ( P 1 ), T 1 = T sat ( P 1 ). Outside of the nuclear industry, state 1 is generally superheated, so all properties are f ( P 1 , T 1 ). (Recommendation: T&Ks superheated steam tables are essentially non-existent. Whites are non-existent Use a thermo book or TK Solver or EES or whatever better tables you have available.) Ideal, Simple Rankine Cycle (2) State 2 is the exit of the turbine. Ideal cycle implies an isentropic turbine, so s 2 = s 1 ....
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RankineCycles_web - ENU 4133 Rankine Cycles April 5, 2010...

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