Penstock
Penstock
Penstock
Economical Diameter of Water Conveyance Metal Pipe of Middle Bhotekoshi Hydroelectric Project:
Annual Mean Discharge
Unit Price of Energy
37.81 m3/s
0.0670 US$/kWh
Points
Shell No.
Surge Tank
Bell Mouth
Top Horizontal
Top Curve Portion
Vertical Portion 1
Vertical Portion 2
Vertical Portion 3
Vertical Portion 4
Vertical Portion 5
Vertical Portion 6
Vertical Portion 7
Vertical Portion 8
Vertical Portion 9
Vertical Portion 10
Vertical Portion 11
Vertical Portion 12
Vertical Portion 13
Lower Curver Position
Incline Portion(3o) 1
Incline Portion(3o) 2
Incline Portion(3o) 3
Incline Portion(3o) 4
Incline Portion(3o) 5
Incline Portion(3o) 6
Incline Portion(3o) 7
Incline Portion(3o) 8
Incline Portion(3o) 9
Incline Portion(3o) 10
Incline Portion(3o) 11
Horizontal Portion 1
Trifurcation Branch
Branch 1
Branch 2
Branch 2 Bend
Branch 3
Branch 3 Bend
Inlet Valve
Horizontal
Distance from
Surge Tank
(m)
0
0.6
M1
1
to
B1
5
7
9
11
13
15
17
19
21
23
25
27
to
to
to
to
to
to
to
to
to
to
to
to
29
B2
6
8
10
12
14
16
18
20
22
24
26
28
30
35
40
45
50
55
60
65
70
75
80
to
to
to
to
to
to
to
to
to
to
to
83
T1
to
to
B3
to
B4
34
39
44
49
54
59
64
69
74
79
82
84
89
94
88
93
99
30.8
50.0
50.0
50.0
50.0
50.0
50.0
50.0
50.0
50.0
50.0
50.0
50.0
50.0
50.0
69.0
99.0
128.9
158.9
188.9
218.9
248.8
278.8
308.8
338.7
368.7
386.7
389.7
392.7
418.4
418.3
422.1
418.3
422.1
437.96
Static
Head
(m)
32.66
32.66
32.66
52.66
64.66
76.66
88.66
100.66
112.66
124.66
136.66
148.66
160.66
172.66
184.66
196.66
200.02
220.02
221.59
223.16
224.73
226.3
227.87
229.44
231.01
232.58
234.15
235.72
236.66
236.66
236.66
236.66
236.66
236.66
236.66
236.66
236.66
Head due to
Water
Hammer
(m)
32.66
32.79
39.32
63.47
75.47
87.47
99.47
111.47
123.47
135.47
147.47
159.47
171.47
183.47
195.47
207.47
210.83
234.93
242.98
251.03
259.08
267.13
275.17
283.22
291.27
299.32
307.37
315.41
320.23
320.88
321.53
327.10
327.08
327.89
327.08
327.89
331.32
0.09
21.40
20.60
25.00
37.80
50.80
Discharge
Velocity
Branch
No. Of Units
Velocity
193.10 Discharge
236.10 Dia:
162.50 Area
50.80
3754.78 US$/ton
50.80
21.40
20.60
25.00
37.80
88.40
7.85 ton/m3
50.80
50.8 m3/s
9.81 m/sec2
0 kg/cm2
0.15
16 mm
60 m
40 %
50.80
77.70
41.70
28.90
41.70
28.90
Head due to
Surging
(m)
92.66
92.66
92.66
112.66
124.66
136.66
148.66
160.66
172.66
184.66
196.66
208.66
220.66
232.66
244.66
256.66
260.02
280.02
281.59
283.16
284.73
286.3
287.87
289.44
291.01
292.58
294.15
295.72
296.66
296.66
296.66
296.66
296.66
296.66
296.66
296.66
296.66
Design Water
Pressure
(kg/cm2)
9.27
9.27
9.27
11.27
12.47
13.67
14.87
16.07
17.27
18.47
19.67
20.87
22.07
23.27
24.47
25.67
26.00
28.00
28.16
28.32
28.47
28.63
28.79
28.94
29.13
29.93
30.74
31.54
32.02
32.09
32.15
32.71
32.71
32.79
32.71
32.79
33.13
4
B1
5
3
3.34
16.93
2.54
5.07
Length
29
B2
m/s
m3/s
m
m2
30
83
T1
84
89
88
93
B3
94
99
B4
37.81 Average
First Trial
Pipe Dia.
(m)
4.221
4.221
4.221
4.104
4.046
3.993
3.945
3.902
3.862
3.825
3.790
3.759
3.729
3.701
3.674
3.649
3.642
3.604
3.601
3.598
3.595
3.592
3.590
3.587
3.584
3.570
3.556
3.543
3.535
3.534
3.533
3.525
3.525
3.524
3.525
3.524
3.518
Shell tk.
(mm)
11
11
11
13
14
16
17
18
19
20
21
22
24
25
26
27
27
29
29
29
29
29
30
30
30
31
31
32
32
32
32
33
33
33
33
33
33
Coefficient of
friction in
pipe
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.012
0.013
0.013
0.013
0.013
0.013
0.013
Second Trial
Economical
Pipe Dia.
Shell tk.
(m)
(mm)
4.30
16
4.30
16
4.30
16
4.10
16
4.10
16
4.00
16
4.00
17
3.90
18
3.90
19
3.90
21
3.80
21
3.80
23
3.80
24
3.70
25
3.70
26
3.70
27
3.70
27
3.60
29
3.60
29
3.60
29
3.60
29
3.60
29
3.60
30
3.60
30
3.60
30
3.60
31
3.60
32
3.60
32
3.60
33
3.60
33
3.60
33
2.54
24
2.54
24
3.54
33
4.54
42
5.54
52
Selected
Dia.
Shell tk.
(m)
(mm)
3.60
16
5.17/3.6
16
3.60
16
3.60
16
3.60
16
3.60
16
3.60
20
3.60
20
3.60
20
3.60
20
3.60
24
3.60
24
3.60
24
3.60
30
3.60
30
3.60
30
3.60
30
3.60
30
3.60
30
3.60
30
3.60
30
3.60
30
3.60
30
3.60
30
3.60
30
3.60
34
3.60
34
3.60
34
3.60
34
3.60
34
4.2/2.54
50
2.54
24
2.54
24
2.54
24
2.54
24
2.54
24
Loss
21.98
31.37
147.36
30.37
321.00
21.69
25.75
25.68
0.05
0.27
0.34
0.27
0.73
0.20
0.08
0.08
3.75
25.68
3.75
UNIT 1
UNIT 2
UNIT 3
0.23
0.08
0.23
2.18
1.95
2.18
Length
(m)
0.00
0.6
21.98
31.37
12.00
12.00
12.00
12.00
12.00
12.00
12.00
12.00
12.00
12.00
12.00
12.00
3.36
30.37
30.00
30.00
30.00
30.00
30.00
30.00
30.00
30.00
30.00
30.00
18.00
3.00
21.69
25.75
25.68
3.75
25.68
3.75
658.98
Weight
ton
0.00
1.8
31.36
44.76
17.12
17.12
21.43
21.43
21.43
21.43
25.74
25.74
25.74
32.23
32.23
32.23
9.02
81.56
80.57
80.57
80.57
80.57
80.57
80.57
80.57
91.41
91.41
91.41
54.85
9.14
129.91
38.65
38.54
5.64
38.54
5.64
1,615.84
Surge Tank
EL 1176.90
Bifurcation Inlet
5.17x0.6
R = 20.0
A = 90.0
CL = 31.37
TL = 20.0
3.98
M1
20.34
00
B1
46.50
R20.
15.00
6X3+3.98=21.98
5
Rock Trap
10
11
12
24X6+3.36=147.36
13
14
15
16
17
18
19
20
21
Penstock Shaft
22
23
24
25
26
R = 20.0
A = 87.0
CL = 30.37
TL = 18.98
3.36
27
28
Powerhouse
3.06
29
B2
1. 25
33
34
35
36
37
38
39
1. 25
7. 15
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
6. 15
1. 00
24.59
62
63
64
65
66
67
68
69
70
71
72
73
74
75
2. 10
76
77
78
79
80
81
82
83
2. 11
3 .06
32
2.54
.0
7
8
31
T1
0. 80
6X53=318.00
1. 00
1. 05
20
.0
0
30
1. 00
0. 50
5. 99
0. 50
11. 13
CROS S S E CT I ON, T HROUGH UNITS (LOWER PART)
3.00
1. 40
13. 10
26.66
Tailrace
PREPARED BY : ..
TITLE
APPROVED BY :
CHECKED BY :
RECOMMENDED BY :
DATE :
0
Scale - A
15
30
45
DRAWING NO.
60m
PENSTOCK
LONGITUDINAL SECTION
MBK-PS-11-02
SHEET NO.
REV:
00
1/5
SCALE 1:200
EL 1176.90
Bifurcation Inlet
5.17x0.6
R = 20.0
A = 90.0
CL = 31.37
TL = 20.0
3.98
M1 1
00
.
0
2
R
B1
46.50
20.34
15.00
6X3+3.98=21.98
5
Rock Trap
10
11
12
13
PREPARED BY : ..
TITLE
APPROVED BY :
CHECKED BY :
RECOMMENDED BY :
DATE :
0
Scale - A
15
30
45
DRAWING NO.
60m
PENSTOCK LONGITUDINAL
SECTION DETAIL 1
MBK-PS-11-02
SHEET NO.
REV:
00
2/5
24X6+3.36=147.36
13
14
15
16
17
18
19
20
21
Penstock Shaft
22
23
24
25
26
R = 20.0
A = 87.0
CL = 30.37
TL = 18.98
3.36
27
28
29
B2
R2
0.
00
30
31
32
33
34
35
36
37
38
39
40
41
42
0
7.
PREPARED BY : ..
CHECKED BY :
RECOMMENDED BY :
44
45
46
DATE :
47
48
49
50
TITLE
APPROVED BY :
43
0
Scale - A
15
30
45
60m
PENSTOCK LONGITUDINAL
SECTION DETAIL 2
51
52
DRAWING NO.
MBK-PS-11-02
SHEET NO.
53
54
REV:
00
3/5
53
54
55
56
57
58
59
60
61
24.59
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
T1
6X53=318.00
3.00
PREPARED BY : ..
TITLE
APPROVED BY :
CHECKED BY :
RECOMMENDED BY :
DATE :
0
Scale - A
15
30
45
60m
PENSTOCK LONGITUDINAL
SECTION DETAIL 3
DRAWING NO.
MBK-PS-11-02
SHEET NO.
REV:
00
4/5
96
86
B3
87
R7.16
B4
92
3
30.0
98
8
10
11
53.36
5.85
8.53
0.40
8.13
0.40
6.50
6.37
6.10
5.97
93 0.40
6.63
0.40
6.23
880.40
6.37
5.97
6.63
0.40
6.23
990.40
5.07
4.67
0.40
2.54
12.90
1.00
1.00
7.35
14.90
2.54
13.90
2.54
13.90
0.25
14.90
5.00
1.00
5.45
0.30
1.00
0.40
1.00
35.24
30.0
6X4+1.75=25.75
R7.16
95
85
4.94
6+4.94=10.94
90
91
94
84
1.75
21.69
.74
2+
2.7
4=
14
6X
R = 7.16
A = 30
CL = 3.75
TL = 1.92
4
2.7
89
0.40
1.00
5.45
0.40
5.85
8.13
0.40
8.53
6.10
0.40
6.50
5.97
0.40
6.37
6.23
0.40
6.63
5.97
0.40
6.37
6.23
0.40
6.63
4.67
0.40
5.07
53.36
PREPARED BY : ..
10
11
TITLE
APPROVED BY :
CHECKED BY :
RECOMMENDED BY :
DATE :
0
Scale - A
15
30
45
60m
PENSTOCK LONGITUDINAL
SECTION DETAIL(PLAN)
DRAWING NO.
MBK-PS-11-02
SHEET NO.
REV:
00
5/5