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Session: Parallel Session: Prototypes and Experiments
Session starts: Friday 23 September, 09:00
Presentation starts: 10:00
Room: Auditorium

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Aleksandra Borsukiewicz-Gozdur (West Pomeranian University of Technology, Department of Heat Engineering Al. Piastow 17, 70-310 Szczecin, Poland)
Pawel Hanausek (Turboservice Sp. z o.o., Wroblewskiego 38A, 93-578 Lodz, Poland)
Wojciech Klonowicz (Turboservice Sp. z o.o., Wroblewskiego 38A, 93-578 Lodz, Poland)

Abstract:
The power plants based on the Organic Rankine Cycle find recently numerous applications in utilization of the low temperature heat sources. The first in Poland experimental plant of that type was built and put into operation at the West Pomeranian University of Technology in Szczecin in 2008. In that plant, a high speed ORC turbine was driving a small centrifugal air compressor. Problems were encountered with sealing system of the turbine shaft and, in consequence, with the leakage of the organic fluid. Therefore, for the next solutions of the ORC power plants that should generate electricity, several concepts of the hermetic turbogenerators were invented. In those concepts the ORC turbine and the electric generator are enclosed in a common hermetic casing, and the electric generator is cooled with the turbine outlet vapour. First small ORC power plant incorporating the invented hermetic turbogenerator and a commercially available hermetic organic liquid pump was then put into operation in 2010. This was preceded by long lasting endurance tests for the insulation materials of the electric generator, during which those materials were immersed in the vapour of the organic fluid selected to work in the ORC power plant. The successful operation of the entirely hermetic ORC power plant will be reported and presented. Additionally, several aspects of the design and applications of the hermetic turbogenerators will be discussed.