COMPLETED PROJECTS | LIST OF ALL Completed Projects | ONGOING PROJECTS | LIST OF ALL ONGOING PROJECTS
Ramya Mini Hydel Scheme 3.8 MW
LOCATION
1 State Andra Pradesh
2 District Kurnool
3 Mandal Nandyala
4 Village Chapirevula
5 River Kundu
6 Ramya MHS Reach Reach is 1200m upstream of Thogarachedu Bridge to 660m downstream of Togarchedu Bridge.
7 Nearest Village Chaprevula (2 km)
8 Nearest Town Nandyala(5km)
9 Nearest Railway head Nandyala.
10 Nearest Airport Hyderabad (290 km)
Purpose of the Project
1 Purpose of the Project Generation and Transmission of Hydro Electric Power
Installed Capacity
1 Installed Capacity 2 x 1.9 MW
Annual Energy Generation
1 Annual Energy Generation 11.50 GWHr.
Hydrology
1 Maximum Inflow during 2004-2008 2758 cumecs
2 Minimum Inflow during 2004-2008 0.20 cumecs
3 Design Power Discharge 50.49 cumecs/ Unit, at rated head
4 Maximum Power Discharge 55.54 cumecs/ Unit, at minimum head & 110% of rated out put
5 Maximum design Flood (at Weir site) 425 cumecs
6 Air Temperature:  
  i) Maximum 42 °C
  ii) Minimum 15 °C
Diversion Barrage
1 Location Weir across Kundu river, about 1.2 km U/s of Togarchedu Bridge.
2 Type Straight gated barrage
3 FRL EL 200.00 m
4 MWL EL 202.00 m
5 Top of Non Overflow Section EL 203.00 m
6 Barrage Crest level EL.197.22 m
7 Deepest foundation level EL 195.20 m
8 Average Bed level EL 196.72 m
9 Height of the weir upto crest (from deepest foundation level) 1.02 m
10 Length of Overflow Section 55.15 m
11 Length of Non-Overflow Section 27 m + 25 m + 201 m = 253 m
12 Length of approach bridge on left bank 70.00 m
13 Total Length 378.15 m
14 Discharge capacity of Weir 425 cumecs (at FRL)
15 Flood Lift over Crest 4.78 m
16 Energy Dissipating Arrangement Stilling basin
17 Barrage Gates  
  a) Nos. 8
  b) Type Automatic Falling gates
  c) Size 6.05 m x 2.78 m
  d) Sill Level EL.197.22 m
  e) Hoist platform Level EL.203.0 m
Approach Channel
1 Length 63.54 m
2 Bed Slope 1:3500
3 Side Slope 1:1
4 Bed Width 50.00 m
5 Lining Type CC lining to bed & sides
6 Bed Level at Start EL: 196.66
7 Bed Level at End EL: 196.64
Intake Pool
1 Start Elevation EL: 196.64 m
2 Horizontal Length of Pool 11.36 m
3 Bed Slope 1 (V) : 2.5 (H)
4 Bed Width Varies from 50 m to 18 m at the Intake
5 Top of Guide wall EL: 203.00 m
Intake Structure
1 No. of Vents Two
2 Service gates size 4.65 m x 4.65 m
3 Stoplog gate size 4.65 m x 4.65 m
4 Trash Rack 10.92 m x 7.5 m
Power House
1 Location Adjacent to Left side NOF Section
2 Type Surface type
3 Size of Machine Hall(outer to outer) 22.0 m x 17.60 m
4 Size of Service Bay (inner to inner) 22.0 m x 7.5 m
5 No. of Bays 2 unit bays and one Service bay
6 No. of Units and Capacity 2 Units of 1900 kW each
7 El. Of Turbine C/L EL 193.33 m
8 Generator Floor Level EL 193.13 m
9 Service/Equipment handling Bay EL 203.00 m
10 Draft tube floor Level EL 186.44 m
11 Max. TWL EL 195.19 m
12 Min TWL EL 194.06 m
Draft Tube Gates
1 Nos. 2
2 Type Vertical Lift Roller Gate
3 Size 6.20 m x 3.42 m
4 Sill Level EL.186.44 m
5 Hoist Level EL.203.0 m
6 Hoist Gantry Crane
Tail Race pool
1 Length 17.71 m
2 Max. TWL EL.195.19 m
3 High Flood Level (River) EL.202.0m
4 Bed Width Varies from 14.7 m to 50 m
5 Side Slopes i) Rock- 1(V):0.25(H) ii) Soil -1(V):1(H)
6 Design Discharge 111.08 cumecs
Tail Race Channel
1 Type Trapezoid Shape, Open Channel
2 Length 103 m
3 Bed width 50 m
4 Bed Gradient 1 : 3500
5 Side Slopes in rock 1 (V) : 0.25 (H)
Turbines
1 Type ‘S’ type Full Kaplan
2 Rated Output 2000 kW
3 Maximum Net Head 5.63 m
4 Minimum Net Head 3.0 m
5 Rated Head 4.50m
6 Rated Discharge per unit 50.49 cumecs
7 Maximum Discharge per unit 55.54 cumecs
8 Rated Speed 150 rpm
9 Runner Dia 3000 mm
10 Efficiency at rated output 92%
11 Continuous Over Load Capacity 10%
Generators
1 Type Synchronous generator coupled through Gear box
2 Rated Output 1900 kW
3 Generation Voltage 6.6 kV or 11 kV
4 Rated Speed 750 rpm
5 Efficiency 95 %
Transmission Lines
1 Length 3 Km
2 Terminal Point Nandyala 11/33/132KV APTRANS CO Substation.
3 Type 132 KV Single Circuit
Out Door Yard
1 Size 77.0 x 27.0m
2 No. of Power Transformers 1
3 Capacity of Power Transformer 15 MVA
4 Step up Voltage of Transformer 132KV
5 Type ONAN
Cost
1 Estimated cost of Civil Works 1419.00
2 Estimated cost of E & M Works 747.00
3 Estimated cost of T -Transmission 375.00
4 Total Project Cost 2541.00
5 Total cost including Escalations and Interest During Construction 2705.00
Energy
1 Total Energy Generation 11.50 GWHr
2 Saleable Energy 10.65 GWHr
3 Cost of Energy Generation (1st Year) Rs.3.63 /GWHr
4 Cost of Installation per kW Rs.71,185.00
Implementation Schedule
1 Implementation Schedule 18 months
 

Copyright 2010, Design Group. All Rights Reserved.