Exergy Analysis of Organic Rankine Cycle and Electric Turbo Compounding for Waste Heat Recovery

  • Authors

    • Mohd Hanif Mat Muhammad
    • Aman Mohd Ihsan Mamat
    • Wan Saiful-islam Wan Salim
    2018-07-21
    https://doi.org/10.14419/ijet.v7i3.11.15951
  • Waste heat recovery, exergy, Organic Rankine Cycle electric turbo compounding.

  • Abstract

    With such tough legislation on current emission standards, car manufacturers are focusing on increasing the efficiency of their engines with the development of advance waste heat recover (WHR) technology. Organic Rankine Cycle (ORC) and Electric Turbo Compounding (ETC) system have a good potential to be used as exhaust energy recovery. This paper compares the exergy availability and losses between the ORC and the ETC. In this particular study, exhaust data from the Proton 1.6L CamPro CFE turbocharged engine was used. This particular engine already has a main turbocharger, making the added WHR as a secondary recovery system to further increase the engine efficiency. Both systems are coupled to a 1 kW electric generator for ease of comparisons. At first the available exergy is calculated for both WHR technologies. Exergy losses from rotating the generator are analysed to finally determine the thermal efficiency of the overall system. Exergy calculation is simplified to only account for chemical and physical exergy since kinetic and potential energy are negligible in comparison. Available exergy for ORC was significantly high which went up to 12.5 kW with the exergy losses recorded at 9.7 kW. The ETC achieved only 5 kW but had a small loss at 8x10-3 kW. Average thermal efficiency of the ORC systems was 10.7% compared to ETC which was 58.7%.  It can be concluded that the complexity of the ORC system contributes to its downfall where multiple components increase its exergy losses compared to the simplistic design of an ETC.

     

     

  • References

    2. lang=EN-GB style='font-size:8.0pt;mso-ansi-language:EN-GB'>
    3. style='mso-element:field-begin'>
    4. style='mso-spacerun:yes'> ADDIN EN.REFLIST
    5. field-separator'>[1] European-Parliament, "Regulation (EC) No 715/2007 of the European Parliament and of the Council of 20 June 2007 on type approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information," Off J Eur Union L Series., vol. 171, 2007.

      [2] A. M. Noor, R. C. Puteh, and S. Rajoo, "Waste Heat Recovery Technologies In Turbocharged Automotive Engine–A Review," Journal of Modern Science and Technology, vol. 2, no. 1, pp. 108-119, 2014.

      [3] R. Saidur, M. Rezaei, W. K. Muzammil, M. H. Hassan, S. Paria, and M. Hasanuzzaman, "Technologies to recover exhaust heat from internal combustion engines," Renewable and Sustainable Energy Reviews, vol. 16, pp. 5649-5659, 2012.

      [4] D. Hountalas and G. Mavropoulos, M. J. Er, Ed. Potential for improving HD diesel truck engine fuel consumption using exhaust heat recovery techniques (New Trends in Technologies: Devices, Computer, Communication and Industrial Systems). Sciyo, 2010.

      [5] S. Lecompte, H. Huisseune, M. van den Broek, B. Vanslambrouck, and M. De Paepe, "Review of organic Rankine cycle (ORC) architectures for waste heat recovery," Renewable and Sustainable Energy Reviews, vol. 47, pp. 448-461, 2015.

      [6] R. K. Stobart, A. Wijewardane, and C. Allen, "The potential for thermo-electric devices in passenger vehicle applications," SAE Technical Paper0148-7191, 2010.

      [7] M. Karri, E. Thacher, and B. Helenbrook, "Exhaust energy conversion by thermoelectric generator: two case studies," Energy Conversion and Management, vol. 52, no. 3, pp. 1596-1611, 2011.

      [8] T. J. Hendricks, S. Yee, and S. LeBlanc, "Cost Scaling of a Real-World Exhaust Waste Heat Recovery Thermoelectric Generator: A Deeper Dive," Journal of Electronic Materials, vol. 45, no. 3, pp. 1751-1761, 2016.

      [9] U. Hopmann and M. C. Algrain, "Diesel engine electric turbo compound technology," SAE Technical Paper0148-7191, 2003.

      [10] F. Jianqin, L. Jingping, Y. Yanping, and Y. Hanqian, "A study on the prospect of engine exhaust gas energy recovery," Electric Information and Control Engineering (ICEICE), 2011 International Conference on, pp. 1960-1963, 2011.

      [11] M. I. Ismail, A. Costall, R. Martinez-Botas, and S. Rajoo, "Turbocharger Matching Method for Reducing Residual Concentration in a Turbocharged Gasoline Engine," SAE Technical Paper0148-7191, 2015.

      [12] C. N. Anthony Lim. (2012). Proton Prevé – our first impressions of the IAFM+ and CFE. Available: http://paultan.org/2012/04/05/proton-preve-our-first-impressions-of-the-iafm-and-cfe/

      [13] Y. A. Çengel, M. A. Boles, and M. Kanoğlu, Thermodynamics: an engineering approach. McGraw-Hill Education, 2015.

      [14] S. Chan, C. Low, and O. Ding, "Energy and exergy analysis of simple solid-oxide fuel-cell power systems," Journal of Power Sources, vol. 103, no. 2, pp. 188-200, 2002.

      [15] S. Safarian and F. Aramoun, "Energy and exergy assessments of modified Organic Rankine Cycles (ORCs)," Energy Reports, vol. 1, pp. 1-7, 2015.

      [16] F. Gharagheizi, P. Ilani-Kashkouli, A. H. Mohammadi, and D. Ramjugernath, "A group contribution method for determination of the standard molar chemical exergy of organic compounds," Energy, vol. 70, pp. 288-297, 2014.

      [17] F. Latrash, M. A. Al-Weshahi, B. M. Makhdoum, and B. Agnew, "Energetic and Exergetic Analysis of Organic Rankine Cycle Powered by Hot Geothermal Water," Journal of Energy and Power Engineering, vol. 8, no. 7, 2014.

      [18] N. M. Razif, A. Mamat, I. Lias, and W. Mohamed, "Thermophysical properties analysis for ammonia-water mixture of an organic Rankine cycle," Jurnal Teknologi, vol. 75, no. 8, 2015.

      [19] R. Tillner-Roth and D. G. Friend, "A Helmholtz free energy formulation of the thermodynamic properties of the mixture {water+ ammonia}," Journal of Physical and Chemical Reference Data, vol. 27, no. 1, pp. 63-96, 1998.

      [20] J. Szargut, Egzergia: poradnik obliczania i stosowania. Wydawnictwo Politechniki ÅšlÄ…skiej, 2007.

      [21] V. Nikulshin, C. Wu, and V. Nikulshina, "Exergy efficiency calculation of energy intensive systems," Exergy, an International Journal, vol. 2, no. 2, pp. 78-86, 2002.

      [22] A. Stegou-Sagia and N. Paignigiannis, "Evaluation of mixtures efficiency in refrigerating systems," Energy Conversion and Management, vol. 46, no. 17, pp. 2787-2802, 2005.

      [23] A. Bejan, Advanced Engineering Thermodynamics. New York: Wiley, 1988.

      [24] N. M. Razif, N. Kamaruddin, A. M. B. Mamat, and W. Mohamed, "Characteristic of ORC finned-Tube condenser design using ammonia-water mixture," 2006.

      [25] P. Mago, K. Srinivasan, L. Chamra, and C. Somayaji, "An examination of exergy destruction in organic Rankine cycles," International Journal of Energy Research, vol. 32, no. 10, pp. 926-938, 2008.

      [26] W. Sun, X. Yue, and Y. Wang, "Exergy efficiency analysis of ORC (Organic Rankine Cycle) and ORC-based combined cycles driven by low-temperature waste heat," Energy Conversion and Management, vol. 135, pp. 63-73, 2017.

    6. "Times New Roman","serif";mso-fareast-font-family:Batang;mso-ansi-language:
    7. EN-GB;mso-fareast-language:KO;mso-bidi-language:AR-SA'>
    8. field-end'>

  • Downloads

  • How to Cite

    Hanif Mat Muhammad, M., Mohd Ihsan Mamat, A., & Saiful-islam Wan Salim, W. (2018). Exergy Analysis of Organic Rankine Cycle and Electric Turbo Compounding for Waste Heat Recovery. International Journal of Engineering & Technology, 7(3.11), 152-156. https://doi.org/10.14419/ijet.v7i3.11.15951

    Received date: 2018-07-21

    Accepted date: 2018-07-21

    Published date: 2018-07-21