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Session: Prototypes II
Session starts: Tuesday 08 October, 09:00
Presentation starts: 09:00
Room: Van Weelde Zaal

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Teemu Turunen-Saaresti ()
Antti Uusitalo ()
Juha Honkatukia ()
Jaakko Larjola ()

Abstract:
Organic Rankine Cycle (ORC) technology has proven successful from a technical and economic point of view in so-called high-temperature heat-recovery and biomass applications having an electric power output in the range of 100 kWe - 5 MWe. However, there are many small-scale energy systems where a micro-scale ORC energy converter with the electrical power output of about 10 kWe could be attractive. This kind of applications include heat recovery from small-scale gas turbines, gas engines, and diesel engines, as well as small-scale concentrated solar power applications, and distributed electricity production from biomass or biogas. The LUT micro-ORC project was started in 2011 aiming to provide knowledge on micro-scale ORC units based on the “high-speed technology” concept, combining the turbine, the pump and the electrical generator on one shaft, whereby the whole assembly is hermetically sealed, and the bearings are lubricated by the working fluid. The project includes a working fluid selection study, component design and performance measurements for a 10 kW micro ORC prototype, as well as a study of potential market and commercialization of waste heat recovery system of such size. A special attention is paid on a compact and simple design of the turbogenerator. The off-design and dynamic performance of the cycle is studied in order to evaluate a part load behaviour of the system. The turbogenerator design criteria are also evaluated based on this dynamic study. REFERENCES [1] A. Uusitalo, T. Turunen-Saaresti, J. Honkatukia, P. Colonna, J. Larjola, “Siloxanes as Working Fluids for Mini-ORC Systems Based on High-Speed Turbogenerator Technology”, J. Eng. Gas Turbines Power, Vol. 135, 042305, (2013) [2] J. Larjola, "Electricity from Industrial Waste Heat Using High-Speed Organic Rankine Cycle (ORC)", Int. J. Production Economics, Vol. 41 pp. 227-235, (1995).