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Submersible centrifugal pumps
These pumps are used in geothermal plants to convey hot water to the earth's surface. The water is accelerated and pumped up by a rotating wheel. Submersible centrifugal pumps pump up to 150 litres of water per second. Depending on the head of the deep water, they are suspended at a depth of several hundred metres. One pump unit is up to 20 metres long, costing several hundred thousand euros. BakerHughes GE is currently the market leader for these special feed pumps. In development projects they strive for a service life of 3 years per pump.