khani hpp 4_pre-feasibility_study - Hydropower Investment ...

Percentage of Mean Annual Flow2520151050Monthly Flow Distribution, Sairme andBaghdati Gauging StationsData from Surface Water Resourcesof the USSR, Volume 9, Transcaucasiaand Dagestan, Edition 1, West Caucasia,1969 (in Russian)Tsablari at SairmeKhanistskali atBaghdatiThe diversion point for Khani 4 HPP is on the Khanistskali River, about 1.0 kmupstream of Kakaskhidi village and about 3.5 km downstream from Khani village.Moderate flows and high head are available at this location, making an HPP of about10.1 MW appear attractive. The power plant will be located on the south-west bankof the Khanistskali River, about 4.0 km upstream from the village of Tskaltashua.The project layout, based on information available at this time, includes a lowdiversion dam with sluices and intake, de-silting facilities, a tunnel water conductor,pressure tank, penstock, and a surface powerhouse, as shown on the ArrangementDrawing, Figure 1. Two Francis turbines could be used at this site (Appendix 6depicts Preliminary Turbine –Generator Characteristics).Project cost and construction scheduleThe estimated cost of the Khani 4 HPP is US$ 21.1 million, or about US$ 2,091/kWof installed capacity, including VAT and a 25% contingency. The project is expectedto have a 1-year pre-construction period and 3-year construction period. The criticalpath for the project may be controlled by the tunnel construction or by theprocurement, manufacture, delivery and installation of major mechanical andelectrical components.ConclusionsAccording to preliminary assessment, the plant offers a good potential opportunity tosell modest amounts of energy during three winter months inside Georgia, replacing(displacing) expensive thermal power; and to export energy during the remainder ofthe year to take advantage of the seasonal differentials in power prices betweenGeorgia and its neighboring countries.Georgia HIPP Page 2 04/15/2013