Page 291 - Steam Turbines Design, Applications, and Rerating

Shortcut Graphical Methods of Turbine Selection
ENTROPY, kJ/(kg . K)
7.5
7.0
8.0
3600
540°C
6.5
160
70
90
120
25
50
18
530°C
520°C
3500
3500
510°C
20
80
140
100
60
500°C
CONSTANT TEMPERATURE
490°C
480°C
470°C
3400
3400
5.0
2.2
4.0
450°C 16
1.8
12
9
7
440°C
CONSTANT ABSOLUTE PRESSURE, bars
10
3.5
4.5
2.0
1.6
14
8
6
430°C
3300
3300
410°C
400°C
380°C
390°C
3200
3200
360°C
370°C
350°C
360°C
6.0
340°C
CONSTANT ABSOLUTE PRESSURE, bars
350°C
330°C
340°C
3100
3100
330°C
310°C
300°C
320°C
TEMPERATURE
290°C
310°C
280°C
300°C
270°C
3000
3000
290°C
260°C
280°C
250°C
270°C
240°C
230°C
260°C
220°C
2900
250°C
2900
210°C
ENTHALPY, kJ/kg
200°C
240°C
230°C
180°C
220°C
170°C
2800
2800
160°C
150°C
140°C
130°C
120°C
SATURATION LINE
110°C
2700
2700
CONSTANT
1
100°C
TEMPERATURE
2 380°C 420°C 40 460°C 30 35 CONSTANT 550°C 190°C 320°C 3.0 2.6 370°C 8.5 3600 ENTHALPY, kJ/kg Metric units 269
90°C
3
CONSTANT
70°C
14 4 80°C
60°C
2600 10 6 5 50°C 2600
12 7 7 ABSOLUTE PRESSURE, bars 2 1 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 2.0 1.6 1.8 1.4 0.9 0.7 6 5 8.5 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
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 1.2 0.8 0.6 0.50 0.40 0.30 9 8 7 2400
16
2300 18 CONSTANT 12 0.16 0.18 0.10 0.07 0.045 0.05 0.035 2300
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.)