Samkuristskali 1 HPP

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Samkuristskali 1 HPP is located in Kakheti region, Akhmeta district, village

Khadori on river Samkuristkali

Installed Capacity - 4.88 MW

Average Annual Generation – 25.70 GW/h

Regulation Type – Run-off-the-river

Capacity Usage Ratio – 60.12%

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Construction Cost – 8.54 million USD

Construction Period – 2 years

Domestic Tariff – 4.8 USc/kWh

Export Tariff – 8 USc/kWh

Project IRR – 16%

Project NPV – 3.44 million USD

Equity IRR – 25%

Equity NPV – 3.71 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.

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Site Location: - Kakheti region, Akhmeta district, village Khadori

- Name of the River: Samkuristskali

- GPS Coordinates: X=529825 Y=4683156

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 - 3.0m, which ensures maximum water discharge, reinforced concrete water intake and silt basin with sluice. Diversion is represented by pressure metal pipeline, diameter - 1.6m, length - 2.8km. Metal surge tank is located at the end of the diversion, diameter - 1.6m. Turbine conduit is 1.0m diameter metal pipe. Power house dimensions are - 12.0x24.0m, height - 18.0m. Tailrace covered channel is reinforced concrete trapezoidal construction, dimensions - 2.0x2.0m, length 60.0m.

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Technical Parameters

Installed Capacity MW 4.88

Average Annual output GWh 25.70

Autumn-winter (Oct-March) generation GWh 5.90

Capacity usage ratio/Efficiency % 60.12

Type of regulation Run-off-the-river

Scheme of energetic usage potential Full

Hydrology

Hydrological Data (number of years) Year 29

Year of the average multi annual discharge Year 1964

Catchment area km2 90.30

High water flow m3/sec 5.17

Average water flow m3/sec 4.20

Low water flow m3/sec 3.37

PMF (1%) m3/sec 295.00

Rated water discharge m3/sec 5.10

Maximum gross head m 116.50

Minimum gross head m 110.00

Reservoir

Full supply level (FSL) masl 1759.00

Minimum Operation level (MOL) masl Unnecessary

Total volume at FSL mln. m3 Unnecessary

Active reservoir level mln. m3 Unnecessary

Dam

Type Tyrol

Crest Elevation masl 1758.60

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Spillway

Type Unnecessary

Crest Elevation masl Unnecessary

Length of spillway crest m Unnecessary

Reservoir elevation during PMF masl 1760.50

Spillway capacity at reservoir level PMF m3/sec 295.00

Water intake

Sill elevation masl 1756.00

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

Diversion

Type of diversion Conduit

Dimensions (w; l) or (d; l) m 1.6; 2800

Stilling basin or shaft

Dimensions (w x l) or (d ) m 1.6

Powerhouse

Type Above-ground

Dimensions (w x h x l) m 12x18x24

Elevation of tailrace outlet sill masl 1644.00

Tailrace

Type Covered channel

Dimensions (w x h) m 2.0x2.0

Elevation of outlet sill masl 1641.00

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Turbines/Generators

Turbine Type and number F. HLA 253-WJ-60; 2

Rated discharge m3/sec 2.55

Rated output MW 2.53

Maximum output MW 2.81

Generator Type SFW 2500-6/1430

Generator nominal output MW 2.44

Generator nominal output rpm 1000/2015

Transformers

Type Three-phase

Number unit 2

Nominal power MVA 2.7

Transformer dimensions (l x w x h) m 4,5x3,15x4,8

Seismic background of the construction site

Richter scale Magnitude 7.0

Economic and Financial Parameters

Costing mln. USD 8.54

Duration of the construction Year 2.00

Investment per 1 kV Thousand USD 1.75

Investment per 1 kV/h USD 0.33

Revenue per USD spent (Average price new HPP - 4,8 cents) USD 0.16

Estimated carbon credit generation T. 9.0

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 3.30

Infrastructure

Existing roads Earth

Roads to be constructed km 3.00

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Number of Observed Years - 29

Chosen Year - 1964

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