STEAM RATING
CHART FOR TURBINES
Table I
Sr. No |
Turbine Inlet Pr. |
Temp |
Exhaust Pr. |
Steam Rating at Turbine Efficiency (Kg/KWH) |
|||||||
|
Kg/cm2g |
0C |
Kg/cm2g |
40% |
Ex.T0c |
45% |
Ex.T 0c |
50% |
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|
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|
|
|
|
|
|
|
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1 |
20 |
320 |
1.0 |
18.78 |
203 |
16.67 |
191 |
15.00 |
|||
2 |
30 |
375 |
1.0 |
15.39 |
234 |
13.68 |
220 |
12.31 |
|||
3 |
42 |
415 |
1.0 |
13.41 |
253 |
11.92 |
237 |
10.73 |
|||
4 |
42 |
440 |
1.0 |
12.92 |
277 |
11.48 |
260 |
10.33 |
|||
5 |
42 |
480 |
1.0 |
12.17 |
314 |
10.82 |
296 |
9.74 |
|||
6 |
62 |
480 |
1.0 |
11.33 |
292 |
10.08 |
272 |
9.07 |
|||
7 |
62 |
510 |
1.0 |
10.86 |
320 |
9.65 |
299 |
8.69 |
|||
8 |
86 |
510 |
1.0 |
10.34 |
299 |
9.19 |
277 |
8.27 |
|||
9 |
42 |
415 |
7.0 |
21.41 |
310 |
19.03 |
300 |
17.12 |
|||
10 |
42 |
440 |
7.0 |
20.50 |
334 |
18.22 |
324 |
16.40 |
|||
11 |
42 |
480 |
7.0 |
19.21 |
373 |
17.07 |
361 |
15.36 |
|||
12 |
62 |
480 |
7.0 |
16.59 |
347 |
14.75 |
334 |
13.27 |
|||
13 |
62 |
510 |
7.0 |
15.80 |
376 |
14.07 |
362 |
12.65 |
|||
14 |
86 |
510 |
7.0 |
14.40 |
353 |
12.80 |
338 |
11.52 |
|||
15 |
42 |
480 |
0.1
(a) |
7.66 |
223 |
6.80 |
192 |
6.12 |
|||
16 |
62 |
480 |
0.1
(a) |
7.40 |
202 |
6.58 |
171 |
5.92 |
|||
17 |
87 |
510 |
0.1
(a) |
6.99 |
210 |
6.21 |
177 |
5.59 |
|||
18 |
20 |
320 |
3.5 |
26.63 |
235 |
23.67 |
223 |
21.30 |
|||
19 |
20 |
370 |
3.5 |
24.23 |
284 |
21.53 |
275 |
19.38 |
|||
20 |
32 |
370 |
3.5 |
20.00 |
258 |
17.78 |
247 |
16.00 |
|||
21 |
32 |
430 |
3.5 |
18.00 |
315 |
16.00 |
302 |
14.40 |
|||
22 |
42 |
430 |
3.5 |
16.52 |
299 |
14.69 |
286 |
13.22 |
|||
23 |
42 |
470 |
3.5 |
15.47 |
337 |
13.75 |
322 |
12.37 |
|||
24 |
62 |
470 |
3.5 |
14.0 |
313 |
12.44 |
297 |
11.20 |
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|
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|
Table II
Sr. No |
Turbine Inlet Pr. |
Temp |
Exhaust Pr. |
Steam Rating at Turbine Efficiency (Kg/KWH) |
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|
Kg/cm2g |
0C |
Kg/cm2g |
55% |
60% |
65% |
70% |
75% |
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|
|
|
|
|
|
|
|
|||
25 |
20 |
320 |
1.0 |
13.66 |
12.52 |
11.55 |
10.73 |
10.02 |
|||
26 |
30 |
375 |
1.0 |
11.19 |
10.26 |
9.47 |
8.79 |
8.20 |
|||
27 |
42 |
415 |
1.0 |
9.75 |
8.94 |
8.25 |
7.66 |
7.15 |
|||
28 |
42 |
440 |
1.0 |
9.39 |
8.61 |
7.95 |
7.38 |
6.89 |
|||
29 |
42 |
480 |
1.0 |
8.85 |
8.11 |
7.49 |
6.95 |
6.49 |
|||
30 |
62 |
480 |
1.0 |
8.24 |
7.56 |
6.98 |
6.47 |
6.05 |
|||
31 |
62 |
510 |
1.0 |
7.90 |
7.24 |
6.68 |
6.20 |
5.79 |
|||
32 |
86 |
510 |
1.0 |
7.51 |
6.89 |
6.36 |
5.90 |
5.61 |
|||
33 |
42 |
415 |
7.0 |
15.55 |
14.27 |
13.17 |
12.23 |
11.42 |
|||
34 |
42 |
440 |
7.0 |
14.90 |
13.66 |
12.61 |
11.71 |
10.93 |
|||
35 |
42 |
480 |
7.0 |
13.97 |
12.86 |
11.82 |
10.97 |
10.25 |
|||
36 |
62 |
480 |
7.0 |
12.06 |
11.06 |
10.20 |
9.48 |
8.84 |
|||
37 |
62 |
510 |
7.0 |
11.50 |
10.54 |
9.72 |
9.03 |
8.43 |
|||
38 |
86 |
510 |
7.0 |
10.47 |
9.60 |
8.86 |
8.23 |
7.68 |
|||
39 |
42 |
480 |
0.1
(a) |
5.55 |
5.10 |
4.71 |
4.37 |
4.08 |
|||
40 |
62 |
480 |
0.1
(a) |
5.38 |
4.93 |
4.56 |
4.23 |
3.95 |
|||
41 |
87 |
510 |
0.1
(a) |
5.08 |
4.66 |
4.30 |
3.99 |
3.72 |
|||
42 |
20 |
320 |
3.5 |
19.37 |
17.65 |
|
|
|
|||
43 |
20 |
370 |
3.5 |
17.62 |
16.15 |
|
|
|
|||
44 |
32 |
370 |
3.5 |
14.55 |
13.34 |
|
|
|
|||
45 |
32 |
430 |
3.5 |
13.09 |
12.00 |
|
|
|
|||
46 |
42 |
430 |
3.5 |
12.02 |
11.02 |
|
|
|
|||
47 |
42 |
470 |
3.5 |
11.25 |
10.31 |
|
|
|
|||
48 |
62 |
470 |
3.5 |
10.18 |
9.33 |
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