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Thermodynamic screening of organic rankine cycle working fluids and architectures: application to automotive internal combustion engines

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Abstract
In the presented work, three promising ORC architectures are thermodynamically investigated for application on internal combustion engines for long-haul trucks. The cycles examined are the subcritical ORC (SCORC), the partial evaporating ORC (PEROC) and the transcritical ORC (TCORC). The employed screening approach has previously been developed by the authors and is now adapted for this particular application. In total 67 working fluids are considered. Four specific cases are postulated. These include various heat source (350°C, 500°C) and heat sink (25°C, 50°C, 75°C, 100°C) conditions and two levels of maximum cycle pressure (32 bar and 50 bar). Additionally, the effect of selecting a volumetric machine as expander type is examined. The results show that the PEORC and the TCORC give the highest second law efficiencies. However, when a simple low expansion ratio volumetric expander is selected, subcritical ORCs gave the highest second law efficiencies. Furthermore methanol and ethanol, operating under subcritical conditions, give generally good results for all cases in the study.
Keywords
Wroking fluids, optimization, automotive, thermodynamics: waste heat, ORC, organic Rankine cycle

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MLA
Lecompte, Steven, Chris Criens, Ilja Siera, et al. “Thermodynamic Screening of Organic Rankine Cycle Working Fluids and Architectures: Application to Automotive Internal Combustion Engines.” 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. Ed. Josua Meyer. 2016. Print.
APA
Lecompte, Steven, Criens, C., Siera, I., van den Broek, M., & De Paepe, M. (2016). Thermodynamic screening of organic rankine cycle working fluids and architectures: application to automotive internal combustion engines. In Josua Meyer (Ed.), 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. Presented at the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics.
Chicago author-date
Lecompte, Steven, Chris Criens, Ilja Siera, Martijn van den Broek, and Michel De Paepe. 2016. “Thermodynamic Screening of Organic Rankine Cycle Working Fluids and Architectures: Application to Automotive Internal Combustion Engines.” In 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, ed. Josua Meyer.
Chicago author-date (all authors)
Lecompte, Steven, Chris Criens, Ilja Siera, Martijn van den Broek, and Michel De Paepe. 2016. “Thermodynamic Screening of Organic Rankine Cycle Working Fluids and Architectures: Application to Automotive Internal Combustion Engines.” In 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, ed. Josua Meyer.
Vancouver
1.
Lecompte S, Criens C, Siera I, van den Broek M, De Paepe M. Thermodynamic screening of organic rankine cycle working fluids and architectures: application to automotive internal combustion engines. In: Meyer J, editor. 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. 2016.
IEEE
[1]
S. Lecompte, C. Criens, I. Siera, M. van den Broek, and M. De Paepe, “Thermodynamic screening of organic rankine cycle working fluids and architectures: application to automotive internal combustion engines,” in 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malaga, Spain, 2016.
@inproceedings{8042539,
  abstract     = {In the presented work, three promising ORC architectures are thermodynamically investigated for application on internal combustion engines for long-haul trucks. The cycles examined are the subcritical ORC (SCORC), the partial evaporating ORC (PEROC) and the transcritical ORC (TCORC). The employed screening approach has previously been developed by the authors and is now adapted for this particular application. In total 67 working fluids are considered. Four specific cases are postulated. These include various heat source (350°C, 500°C) and heat sink (25°C, 50°C, 75°C, 100°C) conditions and two levels of maximum cycle pressure (32 bar and 50 bar). Additionally, the effect of selecting a volumetric machine as expander type is examined. The results show that the PEORC and the TCORC give the highest second law efficiencies. However, when a simple low expansion ratio volumetric expander is selected, subcritical ORCs gave the highest second law efficiencies. Furthermore methanol and ethanol, operating under subcritical conditions, give generally good results for all cases in the study.},
  articleno    = {879},
  author       = {Lecompte, Steven and Criens, Chris and Siera, Ilja and van den Broek, Martijn and De Paepe, Michel},
  booktitle    = {12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics},
  editor       = {Meyer, Josua},
  isbn         = {978-1-77592-124-0},
  keywords     = {Wroking fluids,optimization,automotive,thermodynamics: waste heat,ORC,organic Rankine cycle},
  language     = {eng},
  location     = {Malaga, Spain},
  pages        = {8},
  title        = {Thermodynamic screening of organic rankine cycle working fluids and architectures: application to automotive internal combustion engines},
  year         = {2016},
}