Pelton, Kaplan and Bulb hydro turbines for high and low heads
Pelton bucket turbines for high heads, axial adjustable-blade Kaplan and bulb-type Bulb turbines for low heads. Examples include a 95 MW Pelton for the Kurobegawa No.4 plant and an 18.79 MW bulb turbine for the Nam Ngiep 1 plant. Design uses CFD and model tests.
- Pelton
- bucket turbine for high heads; Kurobegawa No.4, 95 MW, 300/360 rpm
- Bulb
- horizontal bulb turbine for low heads; Nam Ngiep 1, 18.79 MW, 142.9 rpm
- Kaplan
- axial adjustable-blade turbine for low and medium heads
- Design
- CFD, particle method for Pelton buckets, model tests
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Besides radial-axial and diagonal machines, the manufacturer builds Pelton bucket turbines for high heads, as well as axial adjustable-blade Kaplan turbines and bulb-type Bulb turbines for low heads. The machine type is chosen for the head and flow of the plant, and each turbine is designed individually. The characteristics and efficiency are verified on the manufacturer's own model test stand.
A Pelton bucket turbine converts the kinetic energy of the jet leaving the nozzles into rotation of the runner. Particle-method calculation is used to optimise the buckets. It makes it possible to analyse the flow leaving the bucket, which is hard to observe on a model. The parent companies have built Pelton turbines for more than a hundred years. In 1912 a horizontal Pelton turbine with a 250 kVA generator was started, and in 1961 a 95 MW Pelton turbine (300/360 rpm) for the Kurobegawa No.4 plant, at that time the most powerful Pelton turbine in Japan.
Adjustable-blade Kaplan turbines are used at low- and medium-head hydro plants. Bulb turbines are installed at run-of-river plants with small heads, where the generator is placed in a bulb directly in the flow path. An example of supply is the Nam Ngiep 1 re-regulation plant in Laos, where a bulb turbine works with an 18.79 MW / 21,500 kVA generator at 142.9 rpm.
The flow path is calculated with CFD methods, Pelton buckets are additionally checked by particle-method calculation, and the result is confirmed by model tests. Auxiliary equipment (excitation transformers, generator circuit breakers, isolated phase busducts, disconnectors, station service transformers, distribution panels) is offered by the manufacturer as a package based on the overall plant design.
Pelton, Kaplan and Bulb turbines belong to the same line as the Francis and Deriaz turbines, so for a plant the options are compared by head and flow and the suitable machine is selected. The manufacturer can supply the generator, excitation system, protection and control together with the turbine. Runners are also designed separately, so in modernisation a worn runner is replaced with a new one for the required head. Applications: high-head diversion hydro plants (Pelton), run-of-river and low-head plants on large rivers (Kaplan, Bulb), replacement of worn runners during modernisation.
Technical specifications
| Pelton | bucket turbine for high heads; Kurobegawa No.4, 95 MW, 300/360 rpm |
|---|---|
| Bulb | horizontal bulb turbine for low heads; Nam Ngiep 1, 18.79 MW, 142.9 rpm |
| Kaplan | axial adjustable-blade turbine for low and medium heads |
| Design | CFD, particle method for Pelton buckets, model tests |
Request a price and lead time
Pelton, Kaplan and Bulb hydro turbines for high and low heads. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What heads are Pelton, Kaplan and Bulb turbines intended for?
Pelton for high heads, Kaplan for low and medium heads, Bulb for low heads at run-of-river plants.
What are the parameters of the Pelton turbine at the Kurobegawa No.4 plant?
Output of 95 MW at 300/360 rpm. It was started in 1961 and at that time was the most powerful Pelton turbine in Japan.
What is known about the bulb turbine at the Nam Ngiep 1 plant?
The bulb turbine works with an 18.79 MW / 21,500 kVA generator at 142.9 rpm.
Similar equipment from other manufacturers
