Doodhpokhari Chepe Hydropower Public Limited (11 MW)
Doodhpokhari Chepe Hydropower Public Limited (11 MW)
Doodhpokhari Chepe Hydropower Public Limited (DPCHPL) is a 11 MW Run of River (RoR) type of project located at Ajirkot Rural Municipality and Doodhpokhari Rural Municipality of Gorkha and Lamjung district, Gandaki province 4.
The project is about 182 km (aerial) north west of Kathmandu and is situated within Latitude 28°15’02” N to 28°16’52” N and Longitude 84°38’30” E to 84°40’25” E. The project utilizes a design discharge of 1.26m3/s from chepe khola and the elevation difference between the proposed intake at chepe khola and powerhouse for power generation.
The proposed headworks is located at Ajirkot Rural Municipality ,ward no 2, kalo patal phedi (about 3 hr of walk from olang village) and powerhouse area is also located at Ajirkot Rural Municipality, Taal bagar ( about 1.5 hr of walk from olang village). The distance from Taal bagar ( powerhouse ) to Kalo patal phedi( Intake) which is 5km.
The project consists Intake, Bed sluice chamber, Gravel trap, Approach conduit, Desander, Headrace Pipe, Surge tank, Penstock pipe, powerhouse and a tailrace canal.
SALIENT FEATURES OF THE PROJECT
1. General
Project Name
:
Doodhpokhari Chepe Hydropower Project
Type of scheme
:
RoR
Name of River
:
Chepe Khola
District/Province
:
Gorkha and Lamjung
Near town
:
Aabukhaireni
Project accessibility
Black topped road
:
125 km from Kathmandu to 12 kilo(Gorkha)
Earthen road
:
25 km from 12 kilo to Phinamtar Bhachhek
2. Project Co-ordinate
Latitude
:
28°15’02” N – 28°16’52” N
Longitude
:
84°38’30” E – 84°40’25” E
3. Hydrology
Catchment Area at intake
:
31.64 km2(including all intakes)
Catchment Area at powerhouse
:
44.50 km2
Long term average flow at Intake
:
3.05 m3/s
Design Discharge
:
1.50 m3/s
Design Flood at Intake
:
100 m3/s(Return period: 100 years)
Design Flood at Powerhouse
:
160 m3/s(Return period: 100 years)
Environmental d/s release
:
0.063 m3/s
4. Diversion Weir
Type
:
Concrete gravity structure with bottom Intake
Crest elevation
:
2765.00 masi
Length
:
11.80 m
Height from Foundation
:
3.85 m
5. Intake
Type
:
Side intake connected to bottom intake in weir
No. of Openings
:
1
Length of each opening
:
1.95 m
Height of each opening
:
2.00 m
Bottom sill level
:
2765.00 masi
6. Gravel trap
Length
:
4.00 m
Width
:
4.50 m
Average Depth
:
1.30 m
Flushing Channel
:
0.5 m x 0.5 m
7. Approach Pipe
Shape
:
Circular Steel Pipe
Length
:
485.00 m
Diameter
:
1.10 m
No. of anchor blocks
:
7 nos.
8. Settling Basin
No. of bays
:
2
Minimum size of particle trapped
:
0.15 mm
Designed trapping efficiency
:
90%
Transition length
:
11.05 m
Uniform length (each bay)
:
27.00 m
Uniform width (each bay)
:
3.50 m
Average depth
:
5.65 m
Flushing scheme
:
Intermittent Flushing
Flushing channel
:
00.6 m x 0.6 m
9. Headpond
Length
:
7.75 m
Average Width
:
6.10 m
Height
:
5.00 m
10. Headrace Pipe
Type
:
High strength structural steel
Length
:
2024 m
Diameter
:
1.10 m(357m), 1.05 m(831m) and 1.00 m(836m)
Shell thickness
:
8 mm
No. Anchor Blocks
:
25 Nos.
11. Surge tank
Type
:
MS steel, Cylindrical
Diameter
:
1.50 m
Length
:
85.00 m
Maximum surge elevation
:
2774.00 masi
Minimum surge elevation
:
2751. masi
Normal Operation Level
:
2759.50
12. Penstock
Material
:
High strength structural steel
Length
:
2672 m
Diameter
:
0.90 m(782m), 0.80 m(570m) and 0.70 m(1313m)
Shell thickness
:
8 mm to 28 mm
Nos. of Anchor Blocks
:
29 Nos.
Nos. of Saddle Supports
:
320 Nos.
13. Power House
Type
:
Surface
Length
:
24.40 m
Width
:
15.40 m
Height
:
13.80 m
Turbine Axis Level
:
1882.0 masi
14. Tailrace
Type
:
Rectangular canal
Length
:
40 m
Width
:
2.80 m
Heigth
:
1.50 m
15. Turbine
Type
:
Horizontal Pelton
No. of units
:
2
Rated Output Capacity
:
5730 kW
Net Head
:
847.07 m
Discharge per Unit
:
0.75 m3/sec
Rated Efficiency
:
91.00%
Turbine Axis Level
:
1882.00 masi
16. Generator
Type
:
Synchronous, Three phase
Rated output capacity per Unit
:
6540 kVA
Rated Efficiency
:
97.00%
Power Factor
:
0.85
Frequency
:
50 Hz
Generation Voltage
:
6.6 kV
No. of Units
:
2
17. Governor
Type
:
Electronic, PID Flow adjustment
Adjustment for Speed Drop
:
Between 0-5%
18. Transformer
No. of units
:
1
Type
:
Three Phase, Oil Immersed, Outdoor
Rated capacity
:
14.25 MVA
Voltage Ratio
:
6.6 kV/33 kV
Vector Group
:
YNd11
Frequency
:
50Hz
Rated Efficiency
:
99.00%
19. Transmission Line
Voltage Level
:
33 KV single circuit line
Length
:
22 km Approx.
Conductor Type
:
ASCR “Cougar”
Evacuation substation
:
Kirtipur Substation
20. Power and Energy
Gross Head
:
883 m
Net Head
:
847.07 m
Installed Capacity
:
11 MW
Dry season energy
:
23.90 GWh
Wet season energy
:
45.44 GWh
Total energy
:
69.34 GWh
21. Construction Period
Period
:
24 Month’s
22. Project Evaluation
Project cost without IDC
:
NRs 2,005,801,531.00
Project cost with IDC
:
NRs 2,183,301,531.00
Discount rate
:
11%
Internal rate of return (IRR)
:
17.21%
BC ratio
:
1.54
Return on equity (ROE)
:
25.73%
Net Present Value (NPV)
:
NRs 994,629,000.00
Payback period-Simple
:
5.51 yrs
Project Progress and Present Status
Civil Works: Progress in Headworks, Headrace Alignment, Penstock Alignment, and Powerhouse construction.
Hydro-Mechanical Works: Significant progress in procurement and ongoing erection of components.
Disclaimer: This is a summary based on the provided progress report. The actual progress may have changed since November 30, 2024.
Strength of the Project
Strong Financial Backing: The project has secured significant funding through a combination of equity and bank loans.
Experienced Team: The project is backed by experienced individuals in hydropower development, finance, and industrial sectors.
Favorable Project Location: The project is situated in a location with a reliable water source (Chepe Khola) and a significant head difference, which can contribute to efficient power generation.
Progress in Key Areas: The project has made notable progress in several key areas, including civil works, hydro-mechanical works, and transmission line construction.
Positive Financial Indicators: The project exhibits positive financial indicators such as a high Internal Rate of Return (IRR) and a favorable Benefit-Cost Ratio (BCR).
Accessibility
Kalanki to Abukhaireni – 113 km, Prithivi Highway
AbuKhaireni Bazar – Sirandadha – Headworks: Approximately 78 km, providing main access.
Sirandadha – Olang Road: 9 km, complete and maintained.
Olang – Powerhouse: 4 km, complete and maintained.
Powerhouse – Headworks: 12 km, complete and maintained.
