Pelton Turbines'
These turbines are particularly suitable for exploiting plant conditions where there is a low flow utilisation as compared with the water head. Situations where reaction turbines would have excessive speed and would encounter particularly serious problems such as cavi-tation.
One of the most interesting aspects of the Pelton turbine is its flexibility in the presence of marked changes in flow capacity. In fact this machine consists of a flow regulating system which divides up the flow capacity into various injectors, from one to a maximum of six.
Each injector is also capable of regulating its own portion of flow capacity, up to a minimum value of about 15% without creating any noticeable phenomena of load loss. The schematic figure shows that the turbine efficiency is at a constant level on the average down to very low rated flow capacities, thanks to this multiple jet inlet system.
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Photo Detail of Pelton Turbines' (1): |
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