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Session: Poster session
Session starts: Tuesday 13 October, 13:30

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Quirijn Eppinga (Triogen B.V.)
Jos van Buijtenen (Triogen B.V.)

Abstract:
A high efficiency Organic Rankine Cycle (ORC) power unit has been developed by Tri-O-Gen B.V. of The Netherlands. The ORC system is based on a thermally stable hydro-carbon as a working fluid, hence suitable for direct use of intermediate temperature heat sources. The unit is capable of transforming heat flows at temperatures between 350 and 600 ºC into electricity. Typical applications involve the exhaust gasses of gas- or diesel engines and small gas turbines. These can be either fuelled by bio-gas, landfill gas, mine gas, or by natural gas as CHP units, where the power-to-heat ratio can be improved considerably. Unit power ranges from 65 to 165 kWe. Generally, the power produced by the ORC is considered as extra (renewable) power. This paper describes the effect of applying this technology to Diesel engine based power generation, by recovering the heat in the exhaust gas and converting it into electricity. Here, the effect is a direct saving on fuel, as the power output is generally a number dictated by the grid. For a given amount of power, the Diesel engine can run in part-load, reducing its fuel consumption by up to 10 % and increasing its life, and also reducing its emissions of CO2 and other harmful constituents. Applications are in decentralized and remote power, where fuel costs are generally high. An economic evaluation will be given, together with some application examples and recent operating experience.