Upper Radhi Small Hydropower project (URSHP) is a run of the river hydroelectric power generation plant with an installed capacity of 4.4MW which generated 25.02 GWh of energy annually. The Upper Radhi Small Hydropower Project lies in Lamjung district of western development region of Nepal. Radhi Khola is one of the tributaries of Marsyandi River which itself is tributary of Gandaki River, one among the three river basin of Nepal. The project area has no vehicular access. But there is a seasonal vehicular access upto Shreechaur. The total road distance from Kathmandu to project site is about 200km.The Project is under construction and estimated to be completed within 2 years time.
| Descriptions |
Parameters |
| Project name | Upper Radhi Small Hydropower Project (URSHP) |
| Location | |
| Longitude | 84024’34”E and 84027’00”E |
| Lattitude | 28023’48”N and 28024’55”N |
| District | Lamjung |
| Type of power plant | |
| Type | Run-of- river |
| Hydrology |
|
| Catchments area at intake site | 17.0 km2 |
| Long term annual average flow | 1.06 m3/s |
| Average minimum flow | 0.38 m3/s |
| Design flood at intake (1 in 100 Years) | 67.0 m3/s |
| General hydraulics |
|
| Gross head | 617.00 m |
| Net head | 596.60 m |
| Design flow | 0.87 m3/s |
| Capacity | 4.40 MW |
| Diversion weir |
|
| Type | Permanent type, boulder lining with cut-off wall |
| Length | 8.70 m |
| Height | 1.4 m above river bed |
| Crest elevation | 1722.00 masl |
| Intake chamber |
|
| Type | Orifice type side intake |
| Size of opening | 1.5 x 0.5 m (2 Nos.) |
| Bed Load Flushing Arrangement |
|
| Bed load sluice | 2.24 m wide and 1.5m high sliding gate ) |
| Gravel trap |
|
| Gravel trap width | 3.3 m |
| Gravel trap length | 3.3 m |
| Coarse trash rack | 3.7 m x 1.3 m |
| Settling basin |
|
| No of bays | 2 nos. |
| Nominal size of trapped particle | 0.15 mm |
| Trap efficiency | 90% |
| Length |
|
| Inlet transition | 7.28 m |
| Uniform section | 32.0 m |
| Width | |
| Uniform section | 3.0 m each |
| Depth |
|
| Total depth including hopper | 2.1 m |
| Overhead river crossing |
|
| Type | Steel truss bridge |
| Length | 30.0 m |
| Width | 1.0 m |
| Height | 1.0 m |
| Headrace pipe |
|
| Type | Exposed |
| Diameter | 0.60 m mild steel pipe |
| Length | 541.0 m |
| Thickness | 8 mm |
| Surge pipe and tank |
|
| Type | Surface |
| Internal pipe diameter | 1.75 m |
| Tank diameter | 2.5 m |
| Penstock | |
| Material | |
| | |
| Type | Mild Steel (IS 2062), Exposed |
| Diameter | 0.60 m mild steel pipe |
| Length | 1314.0 m |
| Thickness | 8 mm to 32 mm |
| Powerhouse |
|
| Type | Surface |
| Size | 30.0 m long, 12.0 m wide and 9.0 m high |
| Tailrace canal |
|
| Shape | Rectangular |
| Length | 45.0 m |
| Cross-section area | 3.0 m2 (2.0 m wide x 1.5 m high) |
| Turbines |
|
| Type | Pelton |
| No. of jets | 2 |
| Alignment | Horizontal shaft |
| Rated net head | 596.60 m |
| Rated discharge | 0.87 m3/s |
| Turbine rated output (power on shaft) | 2500 kW x 2 |
| Turbine efficiency | 90 % |
| No of units | 2 Nos. |
| Speed | 1000 rpm |
| Axis level | 1105.0 masl |
| Generators |
|
| Type | Synchronous 3 phase |
| Output | 2 X 2500 KVA |
| Rated Voltage | 3.3 KV |
| Insulation Class | F |
| Power factor | 0.80 |
| Rated speed | 1000 rpm |
| Frequency | 50 Hz |
| Excitation | Self excited |
| Transmission line |
|
| Length | 3.0 km, interconnected at proposed Substation in Ghermu Phat |
| Voltage | 33 kV |
| Transformer |
|
| Type of cooling | ONAN |
| Tap changing facility | ±2.5X2 |
| Type | Three phase |
| Rating | 5.0 MVA |
| vector group | Ynd11 |
| Power factor | 0.8 |
| Voltage ratio | 3.3 / 33 KV |
| Frequency | 50 Hz |
| Energy generation |
|
| Mean annual estimated energy per year | 25.62 GWh |
| Dry energy | 5.09 GWh |
| Wet energy | 20.53 GWh |
| Construction Period | 2 Years |
| Financial Indicators (based on 2008 July price level, economical life = 25 years) | |
| Project cost including transmission line and access road( after financing) | NRs 593.201 million |
| Cost per kW ( after financing) | NRs. 134,818.00 |
| Financial Net present value (NPV) | NRs 290.30 million |
| Financial Internal Rate of Return (FIRR) | 21.34% |
| Financial B/C ratio at discount rate of 10% | 3.11 |