An investigation on the performance of a Brayton cycle waste heat recovery system for turbocharged diesel engines
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A Brayton cycle waste heat recovery (WHR) system for turbocharged diesel engines was proposed and the performance of a diesel engine integrated with the proposed system was investigated. The waste heat recovery system is integrated with the turbocharging system of diesel engines, using the turbocharger compressor as the Brayton cycle compressor. The engine cycle simulation code GT-Suite 7.0 was used to investigate the performance of a diesel engine integrated with the WHR system. A Brayton cycle turbine was designed and its performance was simulated with a through-flow model. The turbocharging system of the original engine was modified and the energy flow distribution between the diesel cycle and the Brayton cycle was optimized. Results show that the fuel economy of the diesel engine can be improved by 2.6% at high engine speed and 4.6% at low engine speed under engine full load operating conditions when equipped with the Brayton cycle WHR system. The influence of turbocharger parameters on the WHR engine performance was invesgated.
KeywordsBrayton cycle Turbine Turbocharged diesel engine Waste heat recovery
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- M. Ishii, System optimization of turbo-compound engine (first report: compressor and turbine pressure ratio), SAE Technical Paper 2009-01-1940, doi: 10.4271/2009-01-1940, (2009).Google Scholar
- W. Wei, W. Zhuge, Y. Zhang and Y. He, Comparative study on electric turbo-compounding systems for gasoline engine exhaust energy recovery, ASME GT2010-23204 (2010).Google Scholar
- 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 2007-01-0537, doi: 10.4271/2007-01-0537 (2007).Google Scholar
- H. Teng, G. Regner and C. Cowland, Waste heat recovery of heavy-duty diesel engines by organic rankine cycle part II: working fluids for WHR-ORC, SAE Technical Paper 2007-01-0543, doi: 10.4271/2007-01-0543 (2007).Google Scholar
- D. Sanchez, R. Chacartegui, A. Muñoz and T. Sanchez, A new concept for high temperature fuel cell hybrid systems using supercritical carbon dioxide, Journal of fuel cell science and technology, 6(2) (2009) Article number: 021306.Google Scholar
- M. Bailey, Comparative evaluation of three alternative power cycles for waste heat recovery from the exhaust of adiabatic diesel engines, NASA tech. Memo 86953, July (1985).Google Scholar
- W. Jansen and A. M. Heitmann. Recovery of automobile engine exhaust energy, ASME GT2008-50801.Google Scholar
- W. Zhuge, Y. Zhang, X. Zheng, M. Yang and Y. He, Development of an advanced turbocharger simulation method for cycle simulation of turbocharged internal combustion engines, Proceedings of the Institution of Mechanical Engineering Part D-Journal of Automobile Engineering, 223(D5) (2009) 661–672.CrossRefGoogle Scholar
- W. N. Dawes, Development of a 3D Navier-Stokes solver for application to all types of turbomachinery. ASME 88-GT-70 (1988).Google Scholar