Page 292 - Steam Turbines Design, Applications, and Rerating

Shortcut Graphical Methods of Turbine Selection 269

ENTROPY, kJ/(kg . K)
7.0 7.5 8.0 8.5
3600 3600
550°C
540°C
6.5 160 120 90 70 50 35 25 18 530°C
520°C
3500 510°C 3500 Metric units
140 100 80 60 40 30 20 500°C
490°C
480°C
3400 CONSTANT TEMPERATURE 460°C 12 9 7 5.0 4.0 3.0 2.2 1.8 3400
470°C
450°C 16
440°C
CONSTANT ABSOLUTE PRESSURE, bars 370°C 350°C
430°C
3300 410°C 14 10 8 6 4.5 3.5 2.6 2.0 1.6 3300
420°C
400°C
380°C
390°C
370°C
3200 380°C 360°C 3200
6.0 350°C 330°C
360°C
340°C
340°C
320°C
3100 320°C TEMPERATURE 300°C 290°C 3100
310°C
330°C
CONSTANT
310°C
280°C
300°C
270°C
3000 290°C CONSTANT ABSOLUTE PRESSURE, bars 260°C 3000
280°C 250°C
240°C
270°C 230°C
260°C 220°C
2900 240°C 190°C 2900
250°C
210°C
ENTHALPY, kJ/kg 2800 230°C SATURATION LINE 130°C 170°C 2800 ENTHALPY, kJ/kg
200°C
180°C
220°C
160°C
150°C
140°C
120°C
2700
CONSTANT
2 1 110°C TEMPERATURE 100°C 2700
90°C
3
CONSTANT
70°C
14 5 4 80°C
60°C
2600 10 6 1 50°C 2600
12 7 7 ABSOLUTE PRESSURE, bars 2 40°C Mollier Chart for Steam, Metric Units (Steam Tables, International Edition, by
8 4.5 3.5 8 MOISTURE, % 3
6 9
5.0 2.2 4
2500 4.0 10 1.8 1.4 5 2500 J. H. Keenan, F. G. Keyes, P. G. Hill and J. G. Moore. Copyright 1969 by John Wiley and Sons,
3.0
2.6
2.0 1.6 1.2 0.9 0.7 0.50 7 6 8.5
12
CONSTANT 1.0 0.45 0.35 0.26 0.22 0.20 10 0.14 0.12 0.08 8.0
2400 14 0.8 0.6 0.40 0.30 9 8 2400
16
12
0.16 0.18 0.10 0.07 0.05 0.035
18
2300 0.045 2300
CONSTANT
0.09 0.030
0.06 0.040
14
16
MOISTURE
2200 18 2200 1 bar = 100 kPa
7.5
20
2100 22 2100
7.0
24
2000 26 2000 Figure 14.2
6.0 6.5
ENTROPY, kJ/(kg . K) Inc.)