Betan Karnali PRoR Hydro-electric Project

  • Project Date:23 November 2017
  • Our Team:
  • Client:
  • Categories:Detailed Engineering Study
Description

BETAN KARNALI PRoR HYDROELECTRIC PROJECT (688 MW)

Commencement

December 23,2017

Proposed Completion

October 5 ,2019

Duration

18 + 3.5 Months

Quick View of the Project (Based on desk study)

Generals

 

The Employer

Betan Karnali Sanchayakarta Hydropower Company Ltd.

Pulchowk, Lalitpur Nepal

 

The Consultant

NEA Engineering Company Limited

 

Project Location

Border of Achham District and Surkhet District

 

 

Latitudes 28°56’ 04” to 28°50’57”

 

 

Longitudes 81°24’ 42” to 81°11’ 43”

 

Accessibility

Upto Bijaura – accessible by Motor vehicle.

Powerhouse arounf 80 KM via road from Birendranagar, Surkhet along Baddichaur, Babiya Chaur, Guttu and Bijaura road.

 

Access Road to Project Area

22 km from Bajura in Design Phase

Technical

 

Project Type

Peaking Run-of-River

Hydrology and Sediment Study

 

Karnali River

 

Catchment Area

:22,511.25 Km2

 

Annual Mean Flow

554.13 m3/s

 

Maximum Monthly Discharge

1609.49 m3/s

 

Minimum Monthly Discharge

134.61 m3/s

 

Wet Design Discharge (Q)

580 m3/s

Dam

 

Type of Dam

Roller compacted Concrete ( RCC)

 

Elevation of Dam Location

478.00 masl

Approx. 2.0 Km D/S from Malbela

 

Dam Height

89m from Riverbed

Water Conveyance System

 

Headrace tunnel

 

 

Number

3 nos

  Size and shape

8 m diameter and circular

  Length 2481 m each
  Lining 400 mm thick Concrete Circular lining
  Maximum Velocity 3.85m/s
  Surge Shaft/Tunnel  
  Type Restricted Orifice
  Number 3 nos
  Height 60 m 
  Diameter 25 m circular
  Pressure Shaft  
  Number 3 nos
  Diameter 7 m diameter circular
  Length 298 m each
  penstock Bifurcation from each penstock 2 nos of bifurcation

Penstock

 

Length

: 345 m (Approx.)

 

Type

: Tunnel

 

Powerhouse

 
  Coordinate 81°14'48" E, 28°55'5”N
 

Type

Surface+Dam Toe for environmental release

  Installed capacity 434+8 MW
  PowerHouse Size 150m X 20m X 40 m ( L X B X H)
 

Number and capacity of units

6 nos x 72.33 MW +2 nos. x 4 MW

 

Type of Turbine

: Francis,vertical axis

 

Normal trial water level

374 masl

  Gross Head 99.3 m
  Rated Net Head 94.3 m

Tailrace Tunnel/Channel

 

Number

6 nos of tunnel leading to channel

  Size and shape Trapezoidal Channel
  Length 153m length each tunnel leading to 105m
  Lining concrete lining

 Energy

  Wet Season Energy 1623 GWh/yr
 

Dry Season peak Energy

411GWh/yr

 

Dry Season off peak energy

284 GWh/yr

 

Dry Season Total energy

695 GWh/yr

 

Total annual energy

2318GWH/yr

Consultant Scope of Works:

  • Literature review of the previous study;

Detailed Engineering study of BKHEP incorporating the technical, financial, Socio-economic and relevant aspects of the project development based on detailed survey and investigations.