Introduce about
Nam Ngiep 3A
Nasy Village, Khoun District, Xiengkhuang Province
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$102 M
Project Cost
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44 MW
Installed Capacity
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144 GWh
Average Annual Energy
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30 M
Dam Height
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144 GWh
Reservoir Surface Area
GENERAL
INFORMATION
| Project Cost | $102 M |
| Shareholder | CSE 100% |
| Installed Capacity | 44 MW |
| Average Annual Energy | 144 GWh |
| Design | 36.70 m3/s |
| Rated Head | 153 m |
| Turbine Type |
– Vertical Francis 3 Units
– Horizontal Francis 2 Units |
| Offtaker | EDL |
| Catchment Area | 336 Km2 |
| Mean Annual precipitation | 14m3/s |
| Mean Annual runoff | 2400 mm |
| Reservoir Storage volume | 13.85 Million m3 |
| Maximum Reservoir Surface Area | 1.8 Km2 |
| Full Supply Level | 1,050 m a.s.l |
| Minimum Operating Level | 1,048 m a.s.l |
| 315 |
TECHNICAL
STRUCTURE
| Main Dam | |
| Type | Earth till Dam |
| Height | 30 m |
| Crest Length | 110 m |
| Headrace Channel | |
| Type | Open Channel & Box culvert |
| operation Chanel | 1,100 m |
| Longitudinal Gradient | 500 m |
| Penstock | |
| Type | Steel pipe |
| Number of cell | 1 |
| Diameter | 3.00 m |
| Length | 450 |
| Longitudinal Gradient | – |
| Spillway | |
| Type | Steel Sluice Gate |
| Number of Gate | 2 |
| Maximum Discharge | 450 m3/s |
| Headrace Tunnel(none) | |
| Type | – |
| Design Discharge | – |
| Diameter | – |
| Length | – |
| Tailrace Channel (none) | |
| Type | – |
| Length | – |
| Switchyard 115kV | |
| Elevation | 904.60 m a.s.l |
| Dimension | 45m x 54m |
Hydro-Electro-Mechanical
Information
| Powerhouse | |
| Installed Capacity | 44 MW |
| Number of Units | 5 |
| Turbine Type | Vertical Francis 3 & horizontal Francis 2 |
| Max Discharge | 34 m3/s |
| Erection Floor Elevation | 901.60 m a.s.l |
| 115KV Transmission Line | |
| Substation | NAHO |
| Length | 3 Km |
| Number of circuit | 1 |
| Conductor Size | 240 mm2 |
