Betan Karnali PRoR Hydro-electric Project
- Project Date:23 November 2017
- Our Team:
- Client:
- Categories:Detailed Engineering Study
Description
BETAN KARNALI PRoR HYDROELECTRIC PROJECT (688 MW)
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Commencement |
December 23,2017 |
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Proposed Completion |
October 5 ,2019 |
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Duration |
18 + 3.5 Months |
Quick View of the Project (Based on desk study)
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Generals |
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The Employer |
Betan Karnali Sanchayakarta Hydropower Company Ltd. Pulchowk, Lalitpur Nepal |
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The Consultant |
NEA Engineering Company Limited |
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Project Location |
Border of Achham District and Surkhet District |
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Latitudes 28°56’ 04” to 28°50’57” |
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Longitudes 81°24’ 42” to 81°11’ 43” |
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Accessibility |
Upto Bijaura – accessible by Motor vehicle. Powerhouse arounf 80 KM via road from Birendranagar, Surkhet along Baddichaur, Babiya Chaur, Guttu and Bijaura road. |
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Access Road to Project Area |
22 km from Bajura in Design Phase |
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Technical |
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Project Type |
Peaking Run-of-River |
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Hydrology and Sediment Study |
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Karnali River |
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Catchment Area |
:22,511.25 Km2 |
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Annual Mean Flow |
554.13 m3/s |
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Maximum Monthly Discharge |
1609.49 m3/s |
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Minimum Monthly Discharge |
134.61 m3/s |
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Wet Design Discharge (Q) |
580 m3/s |
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Dam |
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Type of Dam |
Roller compacted Concrete ( RCC) |
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Elevation of Dam Location |
478.00 masl Approx. 2.0 Km D/S from Malbela |
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Dam Height |
89m from Riverbed |
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Water Conveyance System |
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Headrace tunnel |
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Number |
3 nos |
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| Size and shape |
8 m diameter and circular |
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| Length | 2481 m each | |
| Lining | 400 mm thick Concrete Circular lining | |
| Maximum Velocity | 3.85m/s | |
| Surge Shaft/Tunnel | ||
| Type | Restricted Orifice | |
| Number | 3 nos | |
| Height | 60 m | |
| Diameter | 25 m circular | |
| Pressure Shaft | ||
| Number | 3 nos | |
| Diameter | 7 m diameter circular | |
| Length | 298 m each | |
| penstock Bifurcation | from each penstock 2 nos of bifurcation | |
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Penstock |
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Length |
: 345 m (Approx.) |
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Type |
: Tunnel |
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Powerhouse |
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| Coordinate | 81°14'48" E, 28°55'5”N | |
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Type |
Surface+Dam Toe for environmental release |
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| Installed capacity | 434+8 MW | |
| PowerHouse Size | 150m X 20m X 40 m ( L X B X H) | |
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Number and capacity of units |
6 nos x 72.33 MW +2 nos. x 4 MW |
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Type of Turbine |
: Francis,vertical axis |
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Normal trial water level |
374 masl |
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| Gross Head | 99.3 m | |
| Rated Net Head | 94.3 m | |
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Tailrace Tunnel/Channel |
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Number |
6 nos of tunnel leading to channel |
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| Size and shape | Trapezoidal Channel | |
| Length | 153m length each tunnel leading to 105m | |
| Lining | concrete lining | |
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Energy |
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| Wet Season Energy | 1623 GWh/yr | |
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Dry Season peak Energy |
411GWh/yr |
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Dry Season off peak energy |
284 GWh/yr |
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Dry Season Total energy |
695 GWh/yr |
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Total annual energy |
2318GWH/yr |
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Consultant Scope of Works:
- Literature review of the previous study;
Detailed Engineering study of BKHEP incorporating the technical, financial, Socio-economic and relevant aspects of the project development based on detailed survey and investigations.