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Geothermal power plants and heating networks use natural water resources from deep water and rock strata. In terms of the efficiency of the plants, the drilling costs and the premature wear and replacement of the feed pumps have previously made a considerable impact on the balance sheet. The BINE-Projektinfo brochure "Developing robust pumps for geothermal energy" (03/2016) presents modified submersible centrifugal pumps that are specifically adapted to the requirements of deep geothermal energy. The prototypes for the new pumps are already able to withstand the mineral deposits from the thermal water for longer and provide greater energy efficiency than the previous units.
Findings from field tests and high-temperature test rig taken into account
As part of a field test, faulty pumps were brought up to the surface from southern German geothermal plants, broken down into their individual parts and subjected to systematic troubleshooting. The findings were used to develop modified pumps. These have improved components, such as bearings and seals, an optimised motor and a newly developed high-temperature sensor. In order to test the 36-metre pump prototypes as complete systems, the world's largest high-temperature test rig was designed and constructed. Here the newly developed pumps must prove themselves under realistic pressure and temperature conditions.
The pumps previously used in geothermal systems mainly stemmed from oil production, where other conditions prevail. When extracting hot water, the temperatures are higher, the volume greater, the water contains lime and salts, and the pumps run at varying loads. The development of specific geothermal pumps is being conducted as a research project by Baker Hughes INTEQ GmbH from Celle.
You found all informations about the BINE Projektinfo brochure entitled "Developing robust pumps for geothermal energy" (03/2016) here:
http://www.bine.info/en/press/press-releases/press/pressemitteilung/pumpen-besse...
Uwe Milles/Birgit Schneider
presse(at)bine.info
About BINE Information Service
Energy research for practical applications
The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.
About FIZ Karlsruhe
FIZ Karlsruhe – Leibniz Institute for Information Infrastructure is a not-for-profit organization with the public mission to make sci-tech information from all over the world publicly available and to provide related services in order to support the national and international transfer of knowledge and the promotion of innovation.
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FIZ Karlsruhe is a member of the Leibniz Association (WGL) which consists of 87 German research and infrastructure institutions.
http://www.bine.info/en - BINE Informationsdienst
The BINE-Projektinfo brochure "Developing robust pumps for geothermal energy" (03/2016)
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