Double- Turbine

1 Double- runner Francis TurbineContemporary Double- runner Francis TurbineWith new solutions DFT in the last years became a very interesting selection for sites with specific operation requirements and limitationsThe Litostroj Power Group unites tradition, experience, knowledge and the development potential of several reputable European suppliers into a new technological we can offer investors complete solutions ranging from development and design to delivery of turnkey hydroelectric power plant equipment. Our advantage is in the know-how and experience of our employees. Our power is in our go-ahead spirit and [m]Discharge [m3/s]110100101001000100 MW15 MW20 MW25 MW35 MW50 MW1,5 MW3 MW5 MW10 MW1 MWDOUBLE FRANCIS TURBINELITOSTROJ POWERL itostroj PowerLitostrojska cesta 50, 1000 LjubljanaSloveniaTel: +386 1 5824 102 Fax: +386 1 5824 171E-mail: POWERL itostroj Hydro45, Pacifique EstBromont (Quebec)Canada, J2L 1 J4 Tel: +1450 534 2929 Fax: + 1450 534 0136E-mail: POWERC airo Office47, Ramses Box 2370, Floor 2 Cairo, EgyptTel: + 202 2575 39 75 Fax: + 202 2575 35 36E-mail: POWER KD Blansko Engineering apkova 2357/5, 678 01 BlanskoThe Czech RepublicTel: +420 533 309 560 Fax: +420 533 309 557E-mail: POWERH ydraulic Research Center BlanskoHorn Lhota 149 The Czech Republic678 01 BlanskoTel.

2 : +420 515 538 580 Fax: +420 515 538 598E-mail: September 20163D model of a horizontal double Francis TurbinePower houseDFT runnerThe DFT, also known as a Double- Flow Horizontal-Shaft Francis Turbine consists of a single spiral casing with stay vanes, two independent guide vane apparatuses directing flow in each-side of the Double- runner and two draft tubes discharging water into the tailrace. The DFT can operate with one runner only (single- runner operation) or with both runners ( Double- runner operation).Reference ProjectsThe DFT Turbine type it is of great importance for some isolated hydro power plants to allow Turbine operation at low discharges in winter conditions to prevent freezing of the flow-passage system. Because operation is allowed down to about 15% of the unit s maximum discharge, the DFT Turbine is especially suitable for operation with very small discharge during the winter time (freezing prevention, powerhouse heating), for enabling long-term biological minimum discharge in the river or for example for smooth and high efficiency operation at part load where classical solution with one Francis runner is facing problems with pulsations due to formation of the draft tube vortex advantages of Litostroj Power s DFTWide operation range: down to ~15% of Qmax.

3 Suitable for operation with very small discharge penstock freezing prevention powerhouse heating enabling continuous biological minimum discharge in the river local isolated gridsStable operation over all operation range smooth and high efficiency operation at part load (pressure pulsations due to vortex rope).Compact structure, large output power, zero axial force at full and time saving friendly solution for thrust bearings cooling with rangeField of ApplicationDFTs application range: heads from 40 to 250 m discharge from 1,5 to 25 m3/s output up to 25 MWHPP ProjectHn [m]P [kW]n [min-1] unitsYear of supplyMisema, Canada39,9308072012002 Upper Mamquam, Canada1071294072012005 Bone Creek, Canada148,4957490022009 Lower Clowhom, Canada901145672012009 Franquelin, Canada58,111083514,312010 Sheldrake, Canada63,812372514,322012 Val Jalbert, Canada991787260012013