Project Overview
- Location
- Ilam
- Installed Capacity
- 0.1 MW
- Scope of Service
- Detail design of the scheme (AST- Archimedes Screw Turbine)
- Project Type
- Due Diligence
- Status
- Ongoing
Salient Features
| Salient features as per PPA: | |
| Project location | |
| Development Region: | Eastern |
| Zone: | Mechi |
| District: | Ilam |
| Intake site: | Shanti Danda/ Barbote VDCs |
| Powerhouse site: | Barbote VDC |
| Geographical coordinates: | |
| Latitude: | 270 17' 13" N to 270 19' 27" N |
| Longitude: | 860 42' 55" E to 860 46' 05" E |
| General | |
| Name of River: | Puwa Khola |
| Nearest town: | Ilam Bazaar |
| Type of scheme: | Run-of-River |
| Gross head: | 125 m |
| Net Rated head: | 116.91 m |
| Installed capacity: | 4000 kW |
| Average annual energy after outage: | 23.112 GWh |
| Hydrology | |
| Catchment Area: | 94 km2 |
| Mean Annual discharge: | 7.544 m3/s |
| Design discharge (40% PoE) | 4.46 m3/s |
| Riparian release: | 0.108 m3/s |
| Design flood discharge: | 588 m3/s (100 years flood) |
| Average Annual Precipitation: | 1632 mm |
| Diversion Weir | |
| Weir Type: | Concrete Weir |
| Length: | 43.0 m |
| Weir Crest Level: | EL 942 m |
| Maximum Weir height: | 6.0 m above foundation to crest |
| Intake Structure: | Side intake |
| Openings: | 3.00 m x 1.00 m, 2 nos. |
| Desanding Basin | |
| Type: | Surface, Rectangular |
| Length: | 50 m |
| Size (WxD): | 4.60 m x 3.60 m |
| Nos of Bays: | 2 |
| Particle size to be removed: | <0.2 mm |
| Headrace Canal | |
| Type: | Free Flow, Rectangular RCC |
| Length: | 3100 m |
| Size: | 2.25 m X 1.7 m |
| Forebay | |
| Type: | RCC, Rectangular, Surface |
| Capacity of Forebay: | 837 m3 |
| Surface Area: | 60 m (L) x 30 m (W) |
| Normal Water Level: | EL. 938 m |
| Steel Penstock Pipe | |
| Type: | MS welded Pipe |
| Internal diameter: | 1.3 m |
| Length: | 360 m (before bifurcation) |
| Max Steel Thickness: | 10 mm |
| Nos of Anchor Blocks: | 9 |
| Powerhouse | |
| Type: | Surface |
| Size: | 28.50 m x 1.7 m |
| Water Level at Draft Tube: | EL. 817 m |
| Tailrace | |
| Type: | RCC box and open |
| Length: | 29 m |
| Dimension: | 3.0 m (W) x 1.7 m (H) |
| Turbine | |
| Type: | Horizontal Axis, Francis |
| Number: | Two (2) |
| Rated output capacity per unit: | 2,100 kW |
| Efficiency: | 90% |
| Governor | |
| Type: | Electronic with PID Control |
| Adjustment for speed Droop: | Between 0 to 5% |
| Generator | |
| Type: | Synchronous 3 phase |
| Rated output capacity per unit: | 2,352 kVA |
| Power factor: | 0.85 |
| Voltage: | 6.3 kV |
| Frequency: | 50 Hz |
| No. of units: | Two (2) |
| Excitation system: | Brushless |
| Efficiency: | 96% |
| Transformer | |
| Type: | Three phase, ONAN |
| Nos of Unit: | 2 (Two) |
| Rated capacity: | 2,500 kVA |
| Vector Group: | YND 11 |
| Voltage ratio: | 33/6.3 kV |
| Efficiency: | 99% |
| Transmission Line | |
| Voltage level: | 33 kV |
| Length: | 4 km |
| Conductor: | ACSR "DOG" |
| From: | Powerhouse |
| To: | NEA, Godak Sub-Station |
| Project Cost Estimate | |
| Total cost of the project: | NPR 613,868,000.00 |
| Construction Period: | 24 months |