amrp
TRANSCRIPT
OPERATION & MANAGEMENT OF L.I.SCHEMES-CASE STUDY OF
SLBC PUMPING SCHEME
NALGONDA DISTRICT IS A CHRONICALLY
DROUGHT PRONE AREAWITH HIGH FLUORIDE CONTENT IN GROUND
WATER
TO MITIGATE THIS PROBLEM
SLBC SCHEME IS TAKEN UP
SLBC Scheme has 2 alternatives
1.Gravity from Srisailam Reservoir
2. Lift from NagarjunaSagar Reservoir
Lift Scheme has been taken up in 1995 and later it was renamed as AMR Project.
SLBC LIFT SCHEME IS
THE BIGGEST SINGLE STAGE LIFT SCHEME
IN ASIA
SLBC LIFT SCHEME
Aim : 1) To provide irrigation (ID) to 2.20 lakh acres2) To provide drinking water to516 villages
SLBC LIFT SCHEME
• COMPONENTS• APPROACH CHANNEL • APPROACH TUNNEL• SURGE POOL• PUMP HOUSE • DELIVERYMAINS• CISTERN• LINK CANAL• AKKAMPALLY BALANCING RESEVOIR • MAIN CANAL
APPROACH CHANNELAPPROACH CHANNEL
Length : 3.325kmBed width : 15mFSD : 4mDischarge:3000c/s
APPROACH TUNNEL
Length : 1.475kmShape : CircularDiameter : 6mLining : 300mm ThickBed Fall : 1 IN 288
INTAKE STRUCTURE
SURGEPOOL
Size : 20mX50mX62mBottom Level : +138.00mDraft Tube Gates : 2.60mX5.00mWeight of each gate : 8.07MT
PUMP HOUSE
Size : 16mX60mX65mBottom Level : +135.00mPumps : 4No.s of 18MW eachCapacity of each pump: 600 CusecHP of each Pump : 25000
DELIVERY MAINS
Size : 2.50m dia CircularLength : 655mNo. of rows : 4No.sSteel : IS 2002 Grade-IIIThickness of Plates : 14mm
& 16mm
Cistern Reservoir Bund
Length of Dam : 2.290kmCapacity : 0.28TMCFRL : +247.00mTBL : +249.00m
LINK CANAL
Length of Canal : 9.260 kmDischarge : 2400 CusecBed Width : 20.00 mFSD : 3.00 mBed fall : 1 in 7000
A.M.R.P. Main Canal From Akkampally Balancing Reservoir
Surplus EscapeMain Canal Regulator
H.Ps of Main CanalAt Km 25.000 (Common point)
• Discharge: 65.258 Cumec
• Bed Width: 19.10 m • FSD : 3.10 m• CBL @ starting: +230.100 m
PUMPS
• Type of Pump : Vertical shaft single stage Francis Type Runner
• Normal speed : 428.60 RPM• Rated Discharge : 16.85 Cumec (600 cusec)• Guide vane centre line : +142.00m• Submergence of GV
central line below min. water level : 11.00m• Allowable frequency : 50.5Hz to 47.50Hz.
MOTORS
• Type : Vertical shaft AC motor• Speed : 428.60 RPM• Power : 18 MW – 11 KV• Frequency : 50 Hz• Pf (leading) :0.95
SALIENT FEATURES
• MDDL : +155.45m• Max. Elevation to be pumped :249.00m • Maximum Static Head : 96m• Minimum Static Head :69m• Cost of the Scheme :Rs.1026 Crore• Cost of Head works
up to Cistern intake :Rs.300 Crore
DESIGN OF PUMPS
• Capacity of Pump = 9.81XQxHX1.25 KW » Efficiency
where Q= Discharge in cumec
H= Dynamic Head in m
Capacity of Pump = 9.81X16.85x81X1.25 / 0.92
18191KW or Say 18MW
• Though pumps are designed for 18MW , the input is about 15 MW only
• These pumps function from 69m static head to 96m static head• The discharge varies with reference to variation in head and
frequency• Guide vane opening is to be adjusted as per head and frequency
FEATURES OF PUMPS
Dynamic head
100m 81m 74m
In Put 15.02MW 15.24MW 15.10MW
Discharge in cumec
13.68 16.85 17.90
Efficiency 89.3% 87.8% 86%
Guide vane opening
60% 80% 90%
ENERGY CALCULATION
• Energy Required (E)= QxWXH
60X60XEfficiency
where Q= Quantum of water in million cum
W =9.81KN/m3
H= Dynamic Head in m
E= Energy in million KWH
ENERGY REQUIREMENT
• Energy requirement for the scheme is worked out based on the average levels of Nagarjuna Sagar Reservoir.
• The quantum of water to be lifted is 22TMC• Energy required for the scheme is 135Million KWH• Cost of Energy Charges per annum is Rs.34 Crore (Rate per
unit:Rs.2.36)• Maintenance charges including staff : Rs.3.00 Crore per annum• Cost of Maintenance & Energy Charges per Acre is Rs.1680
S NO FINANCIAL YEAR
WATER LIFTED
( TMC)
APPROX. ENERGY
CHARGES ( Rs in Crore)
1 2001-02 2.66 5.32
2 2002-03 0.952 1.90
3 2003-04 4.559 9.10
4 2004-05 14.58 26.24
5 2005-06 17.06 30.70
SLBC LIFT SCHEME-YEARWISE WATER LIFTED & ENERGY CHARGES
Thank You