Commenced in January 2007
Paper Count: 30528
Comparative Study of Sub-Critical and Supercritical ORC Applications for Exhaust Waste Heat Recovery
Abstract:Waste heat recovery by means of Organic Rankine Cycle is a promising technology for the recovery of engine exhaust heat. However, it is complex to find out the optimum cycle conditions with appropriate working fluids to match exhaust gas waste heat due to its high temperature. Hence, this paper focuses on comparing sub-critical and supercritical ORC conditions with eight working fluids on a combined diesel engine-ORC system. The model employs two ORC designs, Regenerative-ORC and Pre-Heating-Regenerative-ORC respectively. The thermodynamic calculations rely on the first and second law of thermodynamics, thermal efficiency and exergy destruction factors are the fundamental parameters evaluated. Additionally, in this study, environmental and safety, GWP (Global Warming Potential) and ODP (Ozone Depletion Potential), characteristic of the refrigerants are taken into consideration as evaluation criteria to define the optimal ORC configuration and conditions. Consequently, the studys outcomes reveal that supercritical ORCs with alkane and siloxane are more suitable for high temperature exhaust waste heat recovery in contrast to sub-critical conditions.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1315792Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 692
 S. N. Hossain and S. Bari, “Waste heat recovery from the exhaust of a diesel generator using rankine cycle,” Energy Conversion and Management, vol. 75, pp. 141–151, 2013.
 H. Chen, D. Y. Goswami, and E. K. Stefanakos, “A review of thermodynamic cycles and working fluids for the conversion of low-grade heat,” Renewable and sustainable energy reviews, vol. 14, no. 9, pp. 3059–3067, 2010.
 D. A. Arias, T. A. Shedd, and R. K. Jester, “Theoretical analysis of waste heat recovery from an internal combustion engine in a hybrid vehicle,” SAE Technical Paper, Tech. Rep., 2006.
 A. Uusitalo, J. Honkatukia, T. Turunen-Saaresti, and J. Larjola, “A thermodynamic analysis of waste heat recovery from reciprocating engine power plants by means of organic rankine cycles,” Applied Thermal Engineering, vol. 70, no. 1, pp. 33–41, 2014.
 K. Kulkarni and A. Sood, “Performance analysis of organic rankine cycle (orc) for recovering waste heat from a heavy duty diesel engine,” SAE Technical Paper, Tech. Rep., 2015.
 C. Sprouse and C. Depcik, “Review of organic rankine cycles for internal combustion engine exhaust waste heat recovery,” Applied thermal engineering, vol. 51, no. 1, pp. 711–722, 2013.
 R. Law, A. Harvey, and D. Reay, “Opportunities for low-grade heat recovery in the uk food processing industry,” Applied thermal engineering, vol. 53, no. 2, pp. 188–196, 2013.
 I. Vaja and A. Gambarotta, “Internal combustion engine (ice) bottoming with organic rankine cycles (orcs),” Energy, vol. 35, no. 2, pp. 1084–1093, 2010.
 B. Peris, J. Navarro-Esbr´ı, and F. Mol´es, “Bottoming organic rankine cycle configurations to increase internal combustion engines power output from cooling water waste heat recovery,” Applied Thermal Engineering, vol. 61, no. 2, pp. 364–371, 2013.
 A. Schuster, S. Karellas, and R. Aumann, “Efficiency optimization potential in supercritical organic rankine cycles,” Energy, vol. 35, no. 2, pp. 1033–1039, 2010.
 S. Glover, R. Douglas, L. Glover, G. McCullough, and S. McKenna, “Automotive waste heat recovery: Working fluid selection and related boundary conditions,” International Journal of Automotive Technology, vol. 16, no. 3, pp. 399–409, 2015.
 R. Freymann, W. Strobl, and A. Obieglo, “The turbosteamer: a system introducing the principle of cogeneration in automotive applications,” MTZ worldwide, vol. 69, no. 5, pp. 20–27, 2008.
 A. F. Agudelo, R. Garc´ıa-Contreras, J. R. Agudelo, and O. Armas, “Potential for exhaust gas energy recovery in a diesel passenger car under european driving cycle,” Applied Energy, vol. 174, pp. 201–212, 2016.
 I. Statistics, “Co2 emissions from fuel combustion-highlights,” IEA, Paris http://www. iea. org/co2highlights/co2highlights. pdf. Cited July, 2011.
 C. Kalra, G. Becquin, J. Jackson, A. L. Laursen, H. Chen, K. Myers, A. Hardy, H. Klockow, and J. Zia, “High-potential working fluids and cycle concepts for next-generation binary organic rankine cycle for enhanced geothermal systems,” in 37th Workshop on Geothermal Reservoir Engineering, Stanford, CA, Jan, 2012.
 S. Glover, R. Douglas, M. De Rosa, X. Zhang, and L. Glover, “Simulation of a multiple heat source supercritical orc (organic rankine cycle) for vehicle waste heat recovery,” Energy, vol. 93, pp. 1568–1580, 2015.
 H. Teng, G. Regner, and C. Cowland, “Achieving high engine efficiency for heavy-duty diesel engines by waste heat recovery using supercritical organic-fluid rankine cycle,” SAE Technical Paper, Tech. Rep., 2006.
 H. Teng, G. Regner, and C. Cowland,, “Waste heat recovery of heavy-duty diesel engines by organic rankine cycle part i: hybrid energy system of diesel and rankine engines,” SAE Technical Paper, Tech. Rep., 2007.
 “Siemens steam turbine sst-060,” http://www.energy.siemens.com/ru/en/ fossil-power-generation/steam-turbines/sst-060.htm, accessed: 2002-2017.
 E. Wang, H. Zhang, B. Fan, M. Ouyang, Y. Zhao, and Q. Mu, “Study of working fluid selection of organic rankine cycle (orc) for engine waste heat recovery,” Energy, vol. 36, no. 5, pp. 3406–3418, 2011.
 J. Hærvig, K. Sørensen, and T. J. Condra, “Guidelines for optimal selection of working fluid for an organic rankine cycle in relation to waste heat recovery,” Energy, vol. 96, pp. 592–602, 2016.
 H. Tian, L. Chang, Y. Gao, G. Shu, M. Zhao, and N. Yan, “Thermo-economic analysis of zeotropic mixtures based on siloxanes for engine waste heat recovery using a dual-loop organic rankine cycle (dorc),” Energy Conversion and Management, vol. 136, pp. 11–26, 2017.
 T. Falano, H. K. Jeswani, and A. Azapagic, “Assessing the environmental sustainability of ethanol from integrated biorefineries,” Biotechnology journal, vol. 9, no. 6, pp. 753–765, 2014.