Cheshura HPP

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Transcript of Cheshura HPP

  • Cheshura HPP

  • Cheshura HPP is located in Racha - Lechkhumi and Kvemo Svaneti region, Oni

    district, village Gona on the river Chashuri.

  • Installed Capacity - 7.50 MW

    Average Annual Generation 32.40 GW/h

    Regulation Type Run-off-the-river

    Capacity Usage Ratio 49.32%

  • Construction Cost 11.25 million USD

    Construction Period 2 years

    Domestic Tariff 4.8 USc/kWh

    Export Tariff 8 USc/kWh

    Project IRR 15%

    Project NPV 3.88 million USD

    Equity IRR 23%

    Equity NPV 4.24 million USD

    Payback Period 9 years

    Note: All the calculations are based on preliminary assumptions. Therefore any clarifications will

    cause appropriate changes in the final results.

  • Site Location: - Racha-Lechkhumi and Kvemo Svaneti region, Oni district, village Gona

    - Name of the River: Chashuri

    - GPS Coordinates: X=381137 Y=4737406

    HPP Type: Diversion, Run-off-the-river

    Site Description: Head unit, diversion pressure pipeline, surge tank, turbine conduit, power house, tailrace channel.

    Head unit conveys Tyrolean weir, height - 5.0m, which ensures maximum water discharge, reinforced concrete water intake and silt basin with sluice. Diversion is a pressure pipeline, diameter - 1.4m, length - 4.6km.

    At the end of the diversion there is a metal surge tank, dimensions - 4.0x18.0m. Turbine conduit is represented by 1.2m diameter metal pipe. Power house dimensions - 12.0x24.0m, height - 18.0m. Tailrace channel is rectangular reinforced concrete construction, dimensions - 1.5x1.5m, length - 120.0m.

  • Technical Parameters

    Installed Capacity MW 7.50

    Average Annual output GWh 32.40

    Autumn-winter (Oct-March) generation GWh 5.23

    Capacity usage ratio/Efficiency % 49.32

    Type of regulation Run-off-the-river

    Scheme of energetic usage potential Partial


    Hydrological Data (number of years) Year 24

    Year of the average multi annual discharge Year 1975

    Catchment area km2 48.20

    High water flow m3/sec 2.82

    Average water flow m3/sec 2.15

    Low water flow m3/sec 1.66

    PMF (1%) m3/sec 86.00

    Rated water discharge m3/sec 3.60

    Maximum gross head m 247.40

    Minimum gross head m 230.50


    Full supply level (FSL) masl 1800.00

    Minimum Operation level (MOL) masl Unnecessary

    Total volume at FSL mln. m3 Unnecessary

    Active reservoir level mln. m3 Unnecessary


    Type Tyrol

    Crest Elevation masl 1799.60

  • Spillway

    Type Unnecessary

    Crest Elevation masl Unnecessary

    Length of spillway crest m Unnecessary

    Reservoir elevation during PMF masl 1801.50

    Spillway capacity at reservoir level PMF m3/sec 86.00

    Water intake

    Sill elevation masl 1797.00

    Stop log type and number Flat surface

    Quantity unit 1

    Sluice or bottom spillway

    Type and number Unnecessary

    Quantity unit Unnecessary

    Dimensions (w x h) or (d) m Unnecessary


    Type of diversion Conduit

    Dimensions (w; l) or (d; l) m 1,4; 4600

    Stilling basin or shaft

    Dimensions (w x l) or (d ) m 4x18


    Type Above-ground

    Dimensions (w x h x l) m 12x18x24

    Elevation of tailrace outlet sill masl 1555.00


    Type Covered channel

    Dimensions (w x h) m 1,5x1,5

    Elevation of outlet sill masl 1550.80

  • Turbines/Generators

    Turbine Type and number F. HLA 179-WJ-71; 2

    Rated discharge m3/sec 1.80

    Rated output MW 3.89

    Maximum output MW 4.32

    Generator Type SF 4000-8/1430-1730

    Generator nominal output MW 3.75

    Generator nominal output rpm 1500


    Type Three-phase

    Number unit 2

    Nominal power MVA 4.2

    Transformer dimensions (l x w x h) m 5,8x3,5x5,3

    Seismic background of the construction site

    Richter scale Magnitude 6.7

    Economic - Financial Parameters

    Costing mln. USD 11.25

    Duration of the construction Year 2.00

    Investment per 1 kV Thousand USD 1.50

    Investment per 1 kV/h USD 0.35

    Revenue per USD spent (Average price new HPP - 4,8 cents) USD 0.15

    Estimated carbon credit generation T. 11.3

    Social and Environmental Parameters

    Special environmental requirements

    Social Impact Additional workplace; Development of infrastructure

    Ecological risks Low

    Transmission lines

    Parameters kV 35

    Distance to inter connection point km 5.00


    Existing roads Gravel

    Roads to be constructed km 0.50

  • Number of observed years 24

    Chosen Year - 1975