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Koilakuntla Mini Hydel Scheme 7.6 MW
LOCATION
1 LOCATION Near Jurreru and Kundu River confluence
2 State Andhra Pradesh
3 District Kurnool
4 Mandal Nandyala
5 Village Koilakuntla
6 River Kundu
7 Koilakuntla MHS Reach Near 83.05 km from exit of escape channel
8 Nearest Village Koilakuntla
9 Nearest Town Nandyala (32 km)
10 Nearest Railway head Nandyala
11 Nearest Airport Hyderabad (325 km)
Purpose of the Project
1 Purpose of the Project Generation and Transmission of Hydro Electric Power
Installed Capacity
1 Installed Capacity 2 x 3.8 MW
Annual Energy Generation
1 Annual Energy Generation 20.88 GWHr.
Hydrology
1 Maximum Inflow during 2007-2008 1213.66 cumecs
2 Minimum Inflow during 2004-2005 0.25 cumecs
3 Design Power Discharge 75.73 cumecs/ Unit, at rated head
4 Maximum Power Discharge 87.09 cumecs/ Unit, at minimum head & 115 % of rated out put
5 Maximum design Flood (at Weir site) 4843 cumecs
6 Air Temperature:  
  Maximum 42 °C
  Minimum 15 °C
Proposed Joladarashi Anicut by Irrigation Department of Andhra Pradesh:
1 Location Upstream of Confluence of Jurreru and Kundu River
2 Type Straight gated barrage
3 Global Co-ordinates Latitude: 15o 14’ 0” N Longitude: 78o 20’ 1”E
4 Seismic Zone Zone - II
5 Catchment area 3338.75 Sq. km (1228.50 Sq. miles) 3300cum (+U/S Reservoirs surplus 1542.70 cumecs)
4873 cumecs (17018 cusecs)
6 FRL EL +187.50 m
7 Top Bund Level EL +192.50 m
8 Barrage Crest level EL.182.00 m
9 MDDL EL+180.00 m
10 Tailwater level at d/s of barrage EL+185.93 m
11 Average River Bed Level EL+180.00m
12 Foundation level EL +177.00 m
13 Basin Floor Level EL +180.00 m
14 Number of vents 19 + 2
15 Size of vents 10.00 m x 5.50 m
16 Thickness of intermediate pier 2.50 m
17 Length of Spillway (between abutments) 260.00 m
18 Type of gate Radial
Intake Structure
1 No. of Vents 2
2 Service gates size 4.330 m x 5.5 m
3 Stoplog gate size 4.330 m x 5.5 m
4 Trash Rack 4.330 m x 16.6 m
5 Type of Hoists  
  Service gate Hydraulic Hoist
  Stoplog gate Gantry crane
  Trash rack  
Power House
1 Location Downstream of left non over flow block of the proposed Joladarashi Anicut
2 Type Surface type
3 Size of Machine Hall (outer to outer) 12 m x 26.6 m
4 Size of Service Bay (inner to inner) 12 m x 6.0 m
5 No. of Bays 2 unit bays and one Service bay
6 No. of Units and Capacity 2 Units of 3800 kW each
7 El. Of Turbine C/L EL 179.4 m
8 Generator Floor Level EL 182.4 m
9 Service/Equipment handling Bay EL 187.5 m
10 Draft tube floor Level EL 169.4 m
11 Max. TWL EL 181.38 m
12 Min TWL EL 179.9 m
Draft Tube Gates
1 Nos. 2
2 Type Vertical Lift Roller Gate
3 Size 4.330 m x 4.82 m
4 Sill Level EL.169.4 m
5 Hoist Level EL.187.5 m
6 Hoist Gantry Crane
Tail Race pool
1 Length 29.6 m
2 Max. TWL EL.181.38 m
3 Min TWL EL 179.9 m
4 High Flood Level (River) EL185.9 m
5 Bed Width Varies from 27.5 m to 55.0 m
6 Side Slopes i) Rock- 1(V):0.25(H) ii) Soil -1(V):1(H)
7 Maximum Discharge 174.18 cumecs
8 Bed level at start EL + 169.6 m
9 Bed level at the end of pool EL + 179.27 m
Tail Race Channel
1 Type Trapezoid Shape, Open Channel
  Bed level at start of Tailrace channel EL + 179.27 m
  Bed level of Kundu river at confluence of TRC and river EL + 179.19 m
2 Length upto Kundu river 260.0 m
3 Bed width 55.0 m to 100.0 m
4 Bed Gradient 1 : 3500
5 Side Slopes in rock 1 (V) : 0.25 (H)
6 Regrading the Kundu river  
7 Reach From Tailrace channel joining point upto 50m downstream of Koilakuntla bridge.
8 Length of river proposed to be regraded 1700 m
9 Bed width of the river 100 m
10 Side slopes of the river after regrading 1 : 3500
Turbines
1 Type Vertical Kaplan
2 Rated Output 3800 kW
3 Maximum Net Head 6.90 m
4 Minimum Net HeadMinimum Net Head 3.95 m
5 Rated Head 6.00 m
6 Rated Discharge per unit 75.73 cumecs
7 Maximum Discharge per unit 87.09 cumecs
8 Rated Speed 130.40 rpm
9 Runner Dia 4000 mm
10 Efficiency at rated output 92 %
11 Continuous Over Load Capacity 15 %
Generators
1 Type Synchronous Generator
2 Rated Output 3800 kW
3 Generation Voltage 11 kV
4 Rated Speed 750 rpm
5 Efficiency 96 %
Transmission Lines
1 Length 32 Km
2 Terminal Point Nandyala 11/33/132KV APTRANS CO Sub-Station.
3 Type 132 KV Single Circuit
Out Door Yard
1 Size 29.0 x 57.0 m
2 No. of Power Transformers 2
3 Capacity of Power Transformer 5 MVA
4 Step up Voltage of Transformer 132 KV
5 Type ONAN
Cost
1 Estimated cost of Civil Works Rs.668.00 Lakhs
2 Estimated cost of E & M Works Rs.1600.00 Lakhs
3 Estimated cost of T -Transmission Rs.651.00 Lakhs
4 Total Project Cost Rs.3467.00 Lakhs
5 Total cost including Escalations and Interest During Construction Rs.3996.00 Lakhs
Energy
1 Total Energy Generation 20.88 GWHr
2 Saleable Energy 19.33 GWHr
3 Cost of Energy Generation (1st Year) Rs.3.4 /GWHr
4 Cost of Installation per kW Rs.52,580.00
Implementation Schedule
1 Implementation Schedule 24 Months
 

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