Client: Ulusal Energy
Status : Completed
Installed Capacity 27 MW
Ulusal I – II Hydropower Projects are both diversion type hydropower facilities located in Eastern Anatolia Region within the border of Siirt province over the Cemil Celi Creek. Ulusal – I Hydropower Project takes use of the head between 1 550 m and 1 320 m and Ulusal - II HEPP makes use of the head between 1 320 m and 1 026 m of Cemil Celi Creek.
Ulusal – I HEPP is designed to produce energy by diverting the flows of main branches of Cemil Celi Creek with the help of five weirs to the powerhouse located at the tailwater elevation of 1.320 m. Ulusal - II weir located just at the downstream of Ulusal - I HEPP is designed to divert the outflows of Ulusal - I HEPP and flows of the sub basins to the Ulusal - II powerhouse at tailwater elevation of 1.026 m. Ulusal - I HEPP project is composed of five diversion weirs, 20.800 m long U-PVC pipeline, 770 m long siphon, a forebay, 510 m long penstock and a powerhouse. Similarly Ulusal - II HEPP project contains a diversion weir, 16.360 m long U-PVC pipeline, 780 m long siphon, a forebay, 650 m long penstock and a powerhouse. By selecting the pipes in various diameters, the shipping charges are reduced considerably. The forebays of both Ulusal - I and Ulusal - II HEPP project are designed to have 25.000 m3 active storage for daily regulation. Thanks to this design, low regimes of flow are stored at the forebay and can be turbined at peak hours. Being located at the downstream of Ulusal - I HEPP, Ulusal - II HEPP can take the advantage of Ulusal – I HEPP’s storage capacity as well. Both powerhouses have two equal capacity horizontal axis Francis turbines.