Akhalkalaki HPP
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Akhalkalaki HPP is located in Samtskhe-Javakheti region, Akhalkalaki district, village Korkhi.
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
Installed Capacity - 15 MW

Average Annual Generation – 85 GW/h

Regulation Type – Reservoir

Capacity Usage Ratio – 66.7%
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
Construction Cost – 25.5 million USD

Construction Period – 2.5 years

Domestic Tariff – 4.8 USc/kWh

Export Tariff – 8 USc/kWh

Estimated carbon credit generation – 29.9 thousand tones
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:
-
-
Samtskhe-Javakheti region, Akhalkalaki district, village Korkhi
Name of the River: Paravani
GPS Coordinates: X=372214 Y=4590639

HPP Type:
-
Diversion, Reservoir

Site Description:
Head unit, diversion channel and free flow tunnel, pressure tank, turbine conduit, power house, tailrace
channel.
Head unit on the river Paravani conveys concrete dam, height - 28.0m, which ensures maximum water
discharge, reinforced concrete water intake. Diversion is represented by free flow tunnel, diameter - 3.5m,
length - 3.7km.
Head unit on the river Janjgajuri conveys concrete dam, height - 5.0m, which ensures maximum water
discharge, reinforced concrete water intake and silt basin. Diversion is represented by channel and free flow
tunnel, diameter - 2.5m, length - 2.4km.
At the end of the diversion there is a reinforced concrete pressure tank, dimensions - 5.0x25.0m. Turbine
conduit is represented by 2.0m diameter bifilar metal pipe. Power house dimensions - 17.0x30.0m , height 15.0m. Tailrace covered channel is reinforced concrete rectangular construction, dimensions - 4.0x4.0m, length
- 450.0m.
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Technical Parameters
Installed Capacity
Average Annual output
Autumn-winter (Oct-March) generation
Capacity usage ratio/Efficiency
Type of regulation
Scheme of energetic usage potential
Hydrology
Hydrological Data (number of years)
Year of the average multi annual discharge
Catchment area
High water flow
Average water flow
Low water flow
PMF (1%)
Rated water discharge
Maximum gross head
Minimum gross head
Reservoir
Full supply level (FSL)
Minimum Operation level (MOL)
Total volume at FSL
Active reservoir level
Dam
Type
Crest Elevation
MW
GWh
GWh
%
14.6
85.35
38.3
66.7
Reservoir
Full
Year
Year
km2
m3/sec
m3/sec
m3/sec
m3/sec
m3/sec
m
m
58
1971
2020.0
25.11
22.1
17.2
120.0
25.0
70.4
67.0
masl
masl
mln. m3
mln. m3
1638.0
1623.0
3.3
2.3
masl
Low crest weir
1638.1
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Spillway
Type
Crest Elevation
Length of spillway crest
Reservoir elevation during PMF
Spillway capacity at reservoir level PMF
Water intake
Sill elevation
Stop log type and number
Quantity
Sluice or bottom spillway
Type and number
Quantity
Dimensions (w x h) or (d)
Diversion
Type of diversion
Dimensions (w; l) or (d; l)
Stilling basin or shaft
Dimensions (w x l) or (d )
Powerhouse
Type
Dimensions (w x h x l)
Elevation of tailrace outlet sill
Tailrace
Type
Dimensions (w x h)
Elevation of outlet sill
masl
m
masl
m3/sec
Surface
1368.1
25.0
1639.1
50.0
unit
1619.0
Butterfly valve
1
unit
m
Bottom
1
3.0
m
Tunnel
3.5; 3700
m
5x25
m
masl
Above-ground
17x15x30
1570.6
m
masl
Channel
4x4
1565.5
masl
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Turbines/Generators
Turbine Type and number
Rated discharge
Rated output
Maximum output
Generator Type
Generator nominal output
Generator nominal output
Transformers
Type
Number
Nominal power
Transformer dimensions (l x w x h)
Seismic background of the construction site
Richter scale
MW
rpm
F. HLA 194-LJ-140; 2
12.5
7.56
8.41
SF 8000-14/2860
7.3
428.6/792
unit
MVA
m
Three-phase
2
8.1
4.5x3.15x4.8
m3/sec
MW
MW
Magnitude
Economic - Financial Parameters
Costing
mln. USD
Duration of the construction
Year
Investment per 1 kV
Thousand USD
Investment per 1 kV/h
USD
Revenue per USD spent (Average price new HPP - 4,8 cents)
USD
Estimated carbon credit generation
T.
Social and Environmental Parameters
Special environmental requirements
Social Impact
6.8
25.50
2.5
1.75
0.3
0.19
29.9
Additional workplace; Development of infrastructure
Ecological risks
Medium
Transmission lines
Parameters
Distance to inter connection point
Infrastructure
Existing roads
Roads to be constructed
kV
km
35
4.5
km
Paved
0.50
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Number of observed years – 58
Chosen Year - 1971
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