SILENT FEATURES OF THE UPPER PUWA I SHP
Salient features of the project are briefly summarized below:
Location of the Project 260 59’ 20” E and 270 01’ 00” E.
870 52’ 36” E and 870 54’ 25” E
Capacity 3 MW
Type of Power Generation Run-of-river
Net Head 165 m
Marketable Annual Energy 17.400 GWh
Dry Energy 2.642 GWh
Wet Energy 14.757 GWh
Thulo Puwa Khola
Type of Intake Side Intake Type
Size of Intake 2*(2 m length x 0.6 m width)
Weir Foundation Level El. 1408.50 m
Sano Puwa Khola
Type of Intake Tyrolean Type
Size of Intake 9 m length x 1.2 m width
Weir Foundation Level El.1412.04 m
Thulo Puwa Khola
Type Overflow
Crest Elevation El 1407.73 m
Width 15.0 m
Flood Discharge (1:100 yr.) 156 m3/s
Sano Puwa Khola
Type Overflow
Crest Elevation El 1408.45 m
Width 9.0 m
Flood Discharge (1:100 yr.) 113 m3/s
Power Canal
Thulo Puwa Khola
Section Rectangular
Size (W x H) 1.40 m x0.95 m
Length 2133 m
Hydraulic Slope 1:500
Sano Puwa Khola
Section Rectangular
Size (W x H) 1.20 m x 0.9 m
Length 1612 m
Hydraulic Slope 1:500
Thulo Puwa Khola
Type Dufour, Continuous/Intermittent flushing
Size (Lef x B x H) 27.50 m x 4.00 m x 2.30 m
Transition Length 7.50 m
Desanding Chambers 1 no.
Particle Size to be settled 0.20 mm
Flushing Gate Size 0.50 m x 0.50 m (1 number)
Sano Puwa Khola
Type Dufour, Continuous/Intermittent flushing
Size (Lef x B x H) 24.00 m x 3.80 m x 2.00 m
Transition Length 7.00 m
Desanding Chambers 1 no.
Particle Size to be settled 0.20 mm
Flushing Gate Size 0.50 m x 0.50 m (1 number)
Type Intermittent flushing
Size (Lef x B x H) 12.00 m x 5.6 m x 3.4 m
Transition Length 13.6 m
Particle Size to be settled less than 0.20 mm
Spillway Type Overflow side spillway
Spillway Length 12.0 m
Flushing Gate Size 0.50 m x 0.50 m (1 number)
Flushing Gate Size 0.30 m x 0.30 m (1 number)
Capacity 228.48 m3
(Volume for 2 minutes Generation)
Type Exposed
Material Steel
Length 460.00 m
Diameter 1.10 m
Thickness 8 mm to 16 mm
Powerhouse
Type of Powerhouse Surface
Size (L x B x H) 22.50 m x 15.33 m x 12.34 m
(Roof ridge)
Turbine
Type of Turbine Francis
No. of Units 2
Axis Horizontal
Rated Speed 1000 rpm.
Runaway Speed 1900 rpm.
Type of Generator Synchronous AC 3 phase, Salient poles Horizontal shaft
Max Rated Capacity 2 x 1875 KVA
Rated Voltage 6.6 KV
Power Factor 0.80
Type Outdoor, 2 units
Power Transformers 6.6/33 kV, 3 phase
Main Transformer and Station Service Transformer
Type Oil immersed self-cooled outdoor type
Rated Capacity 3800 kVA
Number of Units 2
Frequency 50 Hz
Number of Phase 3 phase
Transmission Line LILO system connection to existing 33 Kv transmission line.
Section Rectangular (Box Canal)
Size (W x H) 2.00 m x 1 m
Length 45.00 m
Total Project Cost (Including IDC) NRs. 54,12,00,000
Project Financing Debt/Equity Ratio 67:33
Internal Rate of Return (IRR) 15.42%
Benefit/Cost Ratio (B/C Ratio) 1.50
Project Payback Period 12 Year