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Title: | Experimental Study of a Small Scale Organic Rankine Cycle Waste Heat Recovery System for a Heavy Duty Diesel Engine with Focus on the Radial Inflow Turbine Expander Performance |
Authors: | Alshammari, F Pesyridis, A Karvountzis-Kontakiotis, A Franchetti, B Pesmazoglou, I |
Keywords: | organic;Rankine cycle;heavy duty diesel engine;radial inflow turbine;waste heat recovery |
Issue Date: | 20-Feb-2018 |
Publisher: | Elsevier |
Citation: | Alshammari, F., Pesyridis, A., Karvountzis-Kontakiotis, A., Franchetti, B. and Pesmazoglou, Y. (2018) 'Experimental study of a small scale organic Rankine cycle waste heat recovery system for a heavy duty diesel engine with focus on the radial inflow turbine expander performance', Applied Energy, 215, pp. 543-555. doi: 10.1016/j.apenergy.2018.01.049. |
Abstract: | © 2018 The Authors. The purpose of this work is to experimentally evaluate the effect on fuel efficiency of a small scale organic Rankine cycle (ORC) as a waste heat recovery system (WHRS) in a heavy duty diesel engine that operates at steady state conditions. The WHRS consists of two operating loops, namely a thermal oil loop that extracts heat from the engine exhaust gases, and the working fluid loop which is the ORC system. The expansion machine of the ORC system is a radial inflow turbine with a novel back-swept blading that was designed from scratch and manufactured specifically for this WHR application. The engine test conditions include a partial engine load and speed operating point where various operating conditions of the ORC unit were tested and the maximum thermal efficiency of the ORC was defined close to 4.3%. Simultaneously, the maximum generated power was 6.3 kW at 20,000 rpm and pressure ratio of 5.9. The isentropic efficiency reached its peak of 35.2% at 20,000 rpm and 27% at 15,000 rpm. The experimental results were compared with the CFD results using the same off-design conditions, and the results were in good agreement with a maximum deviation of 1.15% in the total efficiency. Last but not least, the engine-WHRS energy balance is also discussed and presented. |
URI: | https://bura.brunel.ac.uk/handle/2438/16538 |
DOI: | https://doi.org/10.1016/j.apenergy.2018.01.049 |
ISSN: | 0306-2619 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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