Seminar on heat recovery through the application of Rankine cycle Juan Esteban Arango Amaya Instituto Tecnológico Metropolitano – ITM Medellín

Chen Yue, Peneg Wang 10th International Conference on applied energy 2019 Thermal analysis on vehicle energy supplying system based on waste heat recovery ORC Thermal analysis on vehicle energy supplying system based on waste heat recovery ORC

J. Ringler, M. Seifert, V. Guyotot and W. Hübner BMW Group Research and Technology 2009 Rankine Cycle for Waste Heat Recovery of IC Engines

Hossein Nami, Ivar S. Ertesvåg, Roberto Agromayor, Luca Riboldi, Lars O. Nord Energy 2018 Gas turbine exhaust gas heat recovery by organic Rankine cycles (ORC) for offshore combined heat and power applications - Energy and exergy analysis

Research problem How to recover heat and seize it on a Rankine cycle in order to generate electric power? Fig 1. ORC by BorgWarner

Problem’s background Zhang et al. [4] Performed the simulation with an internal combustion diesel engine and used only R245fa as a working fluid, for both primary and secondary ORCs. Tian, Shu, Wei, Liang, & Liu. [5] A heat recovery option based on ORC technology was analyzed, in which approximately one third of the total fuel energy was released by the exhaust system as a 590 °C gas. Javani et al. [6] Use exhaust gas waste heat from the hybrid locomotive in injection or absorption refrigeration cycle system, which plays a good role in exhaust gas waste heat recovery and reduces the energy consumption. Shu et al. [7] Put forward a two-circuit ORC system which includes a high temperature circulation loop and a low temperature circulation loop, high temperature circulation loop is used to recover waste heat of exhaust gas and low temperature circulation loop is used to recover waste heat of engine coolant liquid and high temperature circulation loop residual heat, the results indicated that the exergy efficiency of the system can reach 48.42%, waste heat utilization has been improved significantly.

Proposed models Fig 2. Proposed model of the first author. Fig 3. Proposed model of the second author.

Proposed models Fig 4. Proposed model of the third author. Fig 5. Proposed model of the third author.

Thermal analysis Fig 6. First author thermal model.

Thermal analysis Fig 7. Second author Definitions and abreviations. Fig 8. Second author termal model.

Thermal analysis Fig 9. Third author nomenclature. Fig 10. Third author energy model.

Thermal analysis Fig 11. Third author exergy model.

Results and discussion Fig 12. First author results for winter.Fig 13. First author results for srping and autumn.

Results and discussion Fig 14. First author results for summer.

Results and discussion Fig 15. Second autor power output ratios.Fig 16. Real power net output of system B in comparison to the ideal system performance.

Results and discussion Table 1. Working fluid properties. Table 2. Analysis of the exhaust gas.

Results and discussion Fig 17. Third autor cascade system results.

Results and discussion Fig 18. Third autor series system results.

Conclusions Different heat recovery technologies were reviewed and compared from an automotive perspective. The Rankine steam cycle is identified as a favorable approach for the recuperation of waste heat. For the first author; in winter, under temperatures of 263K, the maximum value of turbine output power and fuel saving rate are 14.7 kW and 0.23, respectively. In spring/autumn, the environment temperature is 288K, the maximum value of the turbine output power and fuel saving rate are 11.6 kW and 0.18, respectively. And finally, in summer, the environment temperature is 308K, the maximum value of turbine output power and fuel saving rate are 9.4 kW and 0.15, respectively. For the second author, system B shows a higher potential at typical highway speeds (45-70 mph) for the engine, the additional power outputs between kW could be demonstrated and his corresponds to an increase in engine performance in the range of 10%. Hence the operation of the Rankine cycle system presented leads to a remarkable increase in fuel efficiency

Conclusions For the third author, it can be concluded that increasing the heat production leads to an increase in the exergy efficiency of both systems since the produced exergy associated with heat load is higher than that of power production. MM is the best option for the cascade configuration.. R124 is the best option of working fluid for the series system.

References [1]J. Ringler, M. Seifert, V. Guyotot, and W. Hübner, “Rankine Cycle for Waste Heat Recovery of IC Engines,” SAE Int. J. Engines, vol. 2, no. 1, pp. 67–76, [2]C. Yue and P. Wang, “Thermal analysis on vehicle energy supplying system based on waste heat recovery ORC,” Energy Procedia, vol. 158, pp. 5587–5595, [3]H. Nami, I. S. Ertesvåg, R. Agromayor, L. Riboldi, and L. O. Nord, “Gas turbine exhaust gas heat recovery by organic Rankine cycles (ORC) for offshore combined heat and power applications - Energy and exergy analysis,” Energy, vol. 165, pp. 1060–1071, [4]H. Zhang et al., “Performance analysis of waste heat recovery with a dual loop organic Rankine cycle (ORC) system for diesel engine under various operating conditions,” Energy Convers. Manag., vol. 80, pp. 243–255, [5]H. Tian, G. Shu, H. Wei, X. Liang, and L. Liu, “Fluids and parameters optimization for the organic Rankine cycles (ORCs) used in exhaust heat recovery of Internal Combustion Engine (ICE),” Energy, vol. 47, no. 1, pp. 125– 136, [6]N. Javani, I. Dincer, and G. F. Naterer, “Thermodynamic analysis of waste heat recovery for cooling systems in hybrid and electric vehicles,” Energy, vol. 46, no. 1, pp. 109–116, [7]L. Shi, G. Shu, H. Tian, and S. Deng, “A review of modified Organic Rankine cycles (ORCs) for internal combustion engine waste heat recovery (ICE-WHR),” Renew. Sustain. Energy Rev., vol. 92, no. April, pp. 95–110, 2018.

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