Pelton water wheel

Anonymous (1895). The Pelton water wheel. Journal of the Franklin Institute 140(3) 160-197. Anonymous (1959). Zum fUnfzigjahrigen Todestag von Lester Pelton. Schweizerische Bauzeitung 77(24) 384-385. P... 

Lescohier, R. (1992). Lester Pelton and the Pelton water wheel. Private printing Grass Valley. P... 

Figure 7.2. Types of water power turbines (a) Pelton water wheel, (b) Franeis turbine, and (c) Kaplan turbine.

The turbine turns a generator to produce electricity [22], A variety of turbines may be used, including a Pelton wheel for high head, low-flow water supply, or a propeller-type turbine for low-head installations [24, 25]. 

Switzerland, with a net head of 5330 ft. The water from this plant drives an impulse turbine (Pelton wheel) with a diameter to the middle of the blades of 10.89 ft. The wheel turns at 500 rpm [1]. What is the ratio of blade speed to jet speed for this turbine How does this compare with the optimum discussed in Sec. 7.4 I... 

Pelton wheel, polyurethane, by ESD, 4-in pitch diameter, just right for spinning permanent magnet motors or car alternators at 1,000 to 2,000 rpm for up to t4-inch water jets. Shape is a bit flat to be a true pelton action, but works quite well for the price. Has /2-inch center hole and can be drilled for attachment to a hub. 113... 

Turgo wheel, bronze, 4-inch pitch diameter, integral hub threaded to screw onto shaft of Delco or 80A Ford alternator. Takes water jet up to 1-inch, up to 4 nozzles, for generation from much lower head pressure than a pelton of similar size. 737... 

Impulse Turbine - A turbine that is driven by high velocity jets of water or steam from a nozzle directed to vanes or buckets attached to a wheel. (A pelton wheel is an impulse hydroturbine). 

Pelton Turbine - A type of impulse hydropower turbine where water passes through nozzles and strikes cups arranged on the periphery of a runner, or wheel, which causes the runner to rotate, producing mechanical energy. The runner is fixed on a shaft, and the rotational motion of the turbine is transmitted by the shaft to a generator. Generally used for high head, low flow applications. 

Water Turbine - A turbine that uses water pressure to rotate its blades the primary types are the Pelton wheel, for high heads (pressure) the Francis turbine, for low to medium heads and the Kaplan for a wide range of heads. Primarily used to power an electric generator. 

Local/external alarm - once the alarm monitoring unit has detected a situation that triggers an alarm it may activate a local and external alarm. The local alarm which indicates that there is a flow in the system is commonly achieved by the use of a Pelton wheel where a small quantity of water that is flowing through the range pipes is diverted and turns a mechanical bell situated near the sprinkler control valve location. The alarm can be raised externally through an automatic link to a commercial, alarm receiving centre (ARC). 

The type of turbine chosen for any hydro scheme will depend upon the discharge rate of the water and the head of water available. A Pelton Wheel is a water turbine in which specially shaped buckets attached to the periphery of the wheel are struck by a jet of water. The kinetic energy of the water turns the wheel which is coupled to the generator. 

Pelton wheels have been modified and improved specifically to optimize them for use with SWRO systems. This innovation has resulted in efficiency and other improvements, and Pelton wheels continue to be used with SWRO systems today. Current Pelton wheel devices have overall net transfer efficiencies of 60-88% (Villa Sallangos, 2004). Figure 4.3 is a typical Pelton wheel efficiency curve and shows the device efficiency at 80%. Optimally, a Pelton wheel can teach 88% efficiency, but this efficiency must be multiplied by the SWRO pumping device it is connected to in order to produce the overall net transfer efficiency. For example, an 85% efficient Pelton wheel operating with an 82% efficient SWRO pump would have an overall net transfer efficiency of the reject hydraulic flow to the feed water hydraulic flow of approximately 70%. 

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