10rankine_v_p_t

# 10rankine_v_p_t - Rankine cycle at various steam pressure...

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Rankine cycle at various steam pressure and temperature define some units kN := 10 3 N kPa := 10 3 Pa MPa := 10 6 Pa kJ := 10 3 J bar := 0.1MPa We have seen the calculation of a Rankine steam cycle in rankine_class_example.mcd Repeating these calculations for various combinations of boiler pressure and temperature allows us to investigate pressure and temperature on ideal thermal efficiency. the calculations are done in the area by doing a matrix of combinations: 30 233.90 p 2 := bar T sat := T sat := 60 90 275.64 303.4 T 3 460 540 120 324.75 ( T sat 460 560 ) since T sat varies with pressure this was accomplished in a 4 x 3 array of temperatures 233.90 460 560 30 275.64 460 560 303.4 460 560 60 90 TT 3 := bar 324.75 460 560 120 efficiency calculations 0.3 0.32 0.33 0.35 0.36 0.38 0.39 0.41 0.42 0.44 0.45 efficiency (reversible) 30 39 48 57 66 75 84 93 102 111 120 pressure bars saturated 460 deg C superheat 560 deg C superheat This plot shows the ideal efficiency at various combinations of pressure and temperature.

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## This note was uploaded on 02/24/2012 for the course MECHANICAL 2.611 taught by Professor Davidburke during the Fall '06 term at MIT.

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10rankine_v_p_t - Rankine cycle at various steam pressure...

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