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Applied Energy xxx (2016) xxx–xxx Contents lists available at ScienceDirect Applied Energy journal homepage: www.elsevier.com/locate/apenergy Performance of a radial-inflow turbine integrated in an ORC system and designed for a WHR on truck application: An experimental comparison between R245fa and R1233zd Ludovic Guillaume ⇑, Arnaud Legros, Adriano Desideri, Vincent Lemort Thermodynamics Laboratory, University of Liège, Campus du Sart Tilman, B49, B-4000 Liège, Belgium highlights A WHRORC test rig integrating a radial inflow turbine is built. Performance of the system is evaluated for two working fluids: R245fa and R1233zd. Three types of experimental comparisons are proposed. R1233zd represents a better choice compared to R245fa for the current application. article info Article history: Received 21 December 2015 Received in revised form 28 February 2016 Accepted 6 March 2016 Available online xxxx Keywords: Waste heat recovery Organic Rankine Cycle Experimental comparison Radial inflow turbine Working fluid R245fa and R1233zd graphicalabstract abstract The goal of this study is to experimentally compare the performance of an Organic Rankine Cycle (ORC) system equipped with a radial-inflow turbine for two working fluids: R245fa and R1233zd. The radial- inflow turbine is a small-scale prototype designed to convert the waste heat from the exhaust gases of a truck combustion engine and was developed mainly using components of truck turbochargers. It is directly connected to a high-speed synchronous generator. The bearings system of the turbine and the generator have the innovative particularity to be respectively lubricated and cooled down by the working fluid so no additional lubricant or coolant is needed. The experimental comparison is carried out over a test-rig equipped with the radial turbine. The heat wasted by the truck through the exhaust gases is sim- ulated using an electric oil boiler coupled to the ORC loop. The electrical power supplied by the turbine, limited to a maximum of 3.5 kWel by the generator, is then dissipated in a load bank composed of truck fans while the condenser is cooled by a water loop. Measurements in steady-state are performed in order to evaluate the performance of the turbine-generator set when varying the pressure ratio, the rotational speed, the inlet temperature and the mass flow rate of the turbine and the lubrication flow rate of the ⇑ Corresponding author. E-mail address: ludovic.guillaume@ulg.ac.be (L. Guillaume). URL: http://www.labothap.ulg.ac.be (L. Guillaume). http://dx.doi.org/10.1016/j.apenergy.2016.03.012 0306-2619/! 2016 Elsevier Ltd. All rights reserved. Please cite this article in press as: Guillaume L et al. Performance of a radial-inflow turbine integrated in an ORC system and designed for a WHR on truck application: An experimental comparison between R245fa and R1233zd. Appl Energy (2016), http://dx.doi.org/10.1016/j.apenergy.2016.03.012PDF Image | WHR on truck ORC radial inflow turbine integrated
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