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Application of Organic Rankine Cycles (ORC) A. Rettig1, M. Lagler2, T. Lamare3, S. Li4, V. Mahadea5, S. McCallion6, J. Chernushevich7 1 ZHAW Institute of Energy Systems and Fluid Engineering, Winterthur, Switzerland 2 Bühler AG, Application Technology Department, Uzwil, Switzerland 3 Holcim Group Support Ltd, Holderbank, Switzerland 4 Australian National University, Canberra, Australia 5 Sofap Ltd., Port Luis, Mauritius 6,7 University of Waterloo, Waterloo, Canada Abstract: Organic Rankine Cycle (ORC) is a technology that can convert thermal energy at relative low temperatures in the range of 80 to 350 °C to electricity. This opens up the possibility to exploit low-grade heat that otherwise would be wasted. It can play an important role to improve the energy efficiency of new or existing energy-intensive applications. The aim of this project is to estimate the potential of new ORC applications. First of all, a short introduction to ORC technology is given. Existing ORC applications are statistically evaluated, which gives an overview of the present ORC business in terms of number and types of applications as well as applied power ranges. The estimation of the heat potential serves as a base e. g. for identifying and evaluating industrial processes with waste heat suitable for ORC applications. Depending on the industrial process the waste energy is rejected at different temperatures, which makes the optimal choice of the working fluid of great importance. Therefore a few aspects of the working fluid selection procedure are presented. Finally, the economical attractiveness of ORC systems is assessed taking into account factors such as ORC module sizes and country specific electricity prices, incentives, tax breaks etc. ORC is a very wide field that allows us to address only a few facets. This paper is meant more as a mid-term than final report since the project is still in progress, i. e. not all of the objectives mentioned above have been accomplished yet. Keywords: Organic Rankine Cycle, ORC, heat potential, working fluid, economy Adrian Rettig, adrian.rettig@zhaw.ch Martin Lagler, martin.lagler@buhlergroup.com Thomas Lamare, thomas.lamare@holcim.com Shuai Li, ls.fly@hotmail.com Varnabhye Mahadea, Varnabhye.Mahadea@sofap.mu Sean McCallion, smaccallion4@gmail.com Julia Chernushevich, julia.chernushevich@gmail.comPDF Image | Application of Organic Rankine Cycles (ORC)
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