Pelton — impulse hydro turbines up to 300 MW, head up to 1500 m
Pelton impulse hydro turbines rated up to 300 MW with a head of up to 1500 m and a runner diameter of up to 5 m. For small hydro plants there are horizontal and vertical turbines with 1–6 nozzles up to 30 MW and 1000 m head. Used at high-head hydro plants, pumped storage plants and in modernization.
- Output
- up to 300 MW (large plants); small hydro up to 30 MW, standard up to 10 MW
- Head
- up to 1500 m (large plants); small hydro up to 1000 m, standard up to 700 m
- Runner diameter
- up to 5 m
- Number of nozzles
- 1–6; horizontal six-nozzle arrangement
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Pelton impulse turbines are used at high-head hydro plants with relatively small flows, in mountain regions and at diversion plants. The manufacturer built its first Pelton turbine in 1903, and thousands of such machines have been supplied since, including large and powerful units. A Pelton turbine performs well at partial load and has high efficiency over a wide flow range.
The flow in an impulse turbine is one of the most difficult problems in hydraulic modelling. The interaction of the jet with the moving buckets is completely unsteady, and the formation of the free jet and the flow in the bucket are determined by a two-phase system of water and air. The manufacturer's numerical simulation group has solved this problem, the calculation results agree well with experiment and formed the basis for new bucket profiles. The Pelton model test rig in Heidenheim was modernized in 2008. Runners are made fully milled from a solid forging (St. Pölten) or from a forged disc with welded-on buckets (São Paulo).
Technical capabilities for large hydro plants: output up to 300 MW, head up to 1500 m, runner diameter up to 5 m. For small hydro plants, horizontal and vertical turbines with 1–6 nozzles are offered, with internal and external needle regulation and a cantilever, 2-, 3- or 4-bearing unit layout. The range extends to 1000 m head and 30 MW, with standard sizes up to 700 m and 10 MW. The manufacturer developed the first horizontal six-nozzle Pelton turbine, on which engineers worked for more than 10 years.
References include San Giacomo sul Vomano (Italy, 282 MW, runner 4.4 m), Zaramag 1 (2 × 176.5 MW at a head of 635 m), Chivor (Colombia, 8 × 151 MW), Alfalfal II (Chile, 2 × 135.6 MW at a head of 1122.6 m), Akköy II (Turkey, 2 × 117 MW at a head of 1220 m), Gilgel Gibe II (Ethiopia, 4 vertical six-nozzle turbines of 105 MW each), Naturns (head 1129 m) and Ritom (Switzerland, 2 × 62.66 MW operating at 16.7 and 50 Hz). Applications are high-head hydro plants, pumped storage plants with ternary units, and modernization.
Technical specifications
| Output | up to 300 MW (large plants); small hydro up to 30 MW, standard up to 10 MW |
|---|---|
| Head | up to 1500 m (large plants); small hydro up to 1000 m, standard up to 700 m |
| Runner diameter | up to 5 m |
| Number of nozzles | 1–6; horizontal six-nozzle arrangement |
| Regulation | nozzles with internal and external needle regulation, jet deflector |
| Design | horizontal and vertical; 2-, 3- or 4-bearing layout |
| Runner manufacture | fully milled from a forging or forged disc with welded-on buckets |
Request a price and lead time
Pelton — impulse hydro turbines up to 300 MW, head up to 1500 m. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What are the output and head of large Pelton turbines?
Output up to 300 MW, head up to 1500 m, runner diameter up to 5 m.
How many nozzles do Pelton turbines for small hydro plants have?
From 1 to 6 nozzles, with internal and external needle regulation. The range extends to 1000 m head and 30 MW, with standard sizes up to 700 m and 10 MW.
How are Pelton runners made?
Runners are made fully milled from a solid forging or from a forged disc with welded-on buckets.
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