bakhvi 4 hpp
TRANSCRIPT
Bakhvi 4 HPP
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Bakhvi 4 HPP is located in Guria region, Ozurgeti district, village Mtispiri
on river Bakhvistskali .
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Installed Capacity - 1 MW
Average Annual Generation – 5.64 GW/h
Regulation Type – Run-off-the-river
Capacity Usage Ratio – 64.4%
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Construction Cost – 2.00 million USD
Construction Period – 1 years
Domestic Tariff – 4.8 USc/kWh
Export Tariff – 8 USc/kWh
Project IRR – 14%
Project NPV – 0.64 million USD
Equity IRR – 22 %
Equity NPV – 0.70 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: - Guria region, Ozurgeti district, village Mtispiri
- Name of the River: Bakhvistskali
- GPS Coordinates: X=265322 Y=4646315
HPP Type: Diversion, Run-off-the-river
Site Description: Head unit, diversion channel, 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 covered channel, dimensions - 2.0x2.0m, length - 0.7km.
Reinforced concrete pressure tank is located at the end of the diversion, dimensions - 5.0x20.0m. Turbine conduit is 1.0m diameter metal pipe. Power house dimensions - 12.0x24.0m, height - 18.0m. Tailrace covered channel is a reinforced concrete construction, dimensions - 2.0x2.0m, length - 50.0m.
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Technical Parameters
Installed Capacity MW 1.00
Average Annual output GWh 5.64
Autumn-winter (Oct-March) generation GWh 2.11
Capacity usage ratio/Efficiency % 64.4
Type of regulation Run-off-the-river
Scheme of energetic usage potential Full
Hydrology
Hydrological Data (number of years) Year 52
Year of the average multi annual discharge Year 1960
Catchment area km2 92.15
High water flow m3/sec 5.88
Average water flow m3/sec 4.43
Low water flow m3/sec 3.06
PMF (1%) m3/sec 189.00
Rated water discharge m3/sec 4.90
Maximum gross head m 31.50
Minimum gross head m 27.20
Reservoir
Full supply level (FSL) masl 272.00
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 271.50
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Spillway
Type Unnecessary
Crest Elevation masl Unnecessary
Length of spillway crest m Unnecessary
Reservoir elevation during PMF masl 273.50
Spillway capacity at reservoir level PMF m3/sec 189.00
Water intake
Sill elevation masl 269.70
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 Covered channel
Dimensions (w; l) or (d; l) m 2x2; 700
Stilling basin or shaft
Dimensions (w x l) or (d ) m 5x20
Powerhouse
Type Above-ground
Dimensions (w x h x l) m 12x18x24
Elevation of tailrace outlet sill masl 243.00
Tailrace
Type Covered channel
Dimensions (w x h) m 2x2
Elevation of outlet sill masl 238.50
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Turbines/Generators
Turbine Type and number F. HLD74-WJ-60; 2
Rated discharge m3/sec 2.45
Rated output MW 0.52
Maximum output MW 0.58
Generator Type SFW630-8/990
Generator nominal output MW 0.50
Generator nominal output rpm 752
Transformers
Type Three-phase
Number unit 2
Nominal power MVA 0.7
Transformer dimensions (l x w x h) m 4.5x3.15, 15x4.8
Seismic background of the construction site
Richter scale Magnitude 6.0
Economic - Financial Parameters
Costing mln. USD 2.00
Duration of the construction Year 1.00
Investment per 1 kV Thousand USD 1.35
Investment per 1 kV/h USD 0.29
Revenue per USD spent (Average price new HPP - 4,8 cents) USD 0.16
Estimated carbon credit generation T. 2.4
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 0.90
Infrastructure
Existing roads Earth
Roads to be constructed km 0.30
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Number of observed years – 52
Chosen Year - 1960
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