Khani Khola 1 Hydropower Project

Salient features of the project

 

GENERAL

Name of Project

River 

Type of Scheme 

Location

 

Khani Khola 1 Hydropower Project

Khani Khola

Run-of-River 

Marbu VDC, Dolakha District

HYDROLOGY

Catchment Area

Design Discharge (40 percentile flow)

 

76 sq. km.

5.1 cubic m per sec

DIVERSION WEIR

Type

Normal Water Level

Height

Length

 

Ogee Shape

3388.00 m amsl

3 m

8 m

DESANDER

Effective Length

No. of Bays

Width per Bay

Trap Efficiency

Flow Velocity

 

75 m

2

7.5 m

90%

0.15 m/s

HEADRACE TUNNEL

Support Type

Length

Size

Type

 

Shotcrete and Concrete Lined

1950 m

2.2 m x 2.2 m D-Shaped

Pressure Flow

SURGE SHAFT

Shape

Diameter

Height

Normal Water Level

Maximum Upsurge Level

Minimum Downsurge Level

 

Circular

5 m

32.2 m

3382.32 m amsl

3395.62 m amsl

3375.04 m amsl

UNDERGROUND PENSTOCK-INCLINED & HORIZONTAL

Internal Diameter

Length

Thickness

 

1.2 - 1.3 m

1470 m

12 to 26 mm

POWERHOUSE

Type

Size

Turbine Centre Line Elevation

Type of Switchyard

 

Underground

46(L) x 12(W) x 16(H)

2425 m

Outdoor

MAIN ACCESS TUNNEL

Shape

Size

Length

 

Inverted D-Shaped

5m(W) x 5m(H)

260 m

ELECTRO-MECHANICAL EQUIPMENTS

Turbine

No. of Units

Turbine Speed

 

Pelton

3

750 rpm

POWER AND ENERGY

Installed Capacity

Gross Head

Net Head

Annual Energy Generation

Annual Dry Energy

Annual Wet Energy

Plant Factor

 

40 MW

963 m

940 m

229.50 GWh

33.53 GWh

195.97 GWh

65%