THERMAL SCIENCE

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Habib Gürbüz

,

Hüsameddin Akçay

EXPERIMENTAL INVESTIGATION OF AN IMPROVED EXHAUST RECOVERY SYSTEM FOR LIQUID PETROLEUM GAS FUELED SPARK IGNITION ENGINE

ABSTRACT
In this study, we have investigated the recovery of energy lost as waste heat from exhaust gas and engine coolant, using an improved thermoelectric generator (TEG) in a LPG fueled SI engine. For this purpose, we have designed and manufactured a 5-layer heat exchanger from aluminum sheet. Electrical energy generated by the TEG was then used to produce hydrogen in a PEM water electrolyzer. The experiment was conducted at a stoichiometric mixture ratio, 1/2 throttle position and six different engine speeds at 1800-4000 rpm. The results of this study show that the configuration of 5-layer counterflow produce a higher TEG output power than 5-layer parallel flow and 3-layer counterflow. The TEG produced a maximum power of 63.18 W when used in a 5-layer counter flow configuration. This resulted in an improved engine performance, reduced exhaust emission as well as an increased engine speed when LPG fueled SI engine is enriched with hydrogen produced by the PEM electrolyser supported by TEG. Also, the need to use an extra evaporator for the LPG fueled SI engine is eliminated as LPG heat exchangers are added to the fuel line. It can be concluded that an improved exhaust recovery system for automobiles can be developed by incorporating a PEM electrolyser, however at the expense of increasing costs.
KEYWORDS
LPG fueled SI engine, waste heat recovery, thermoelectric generator, hydrogen production
PAPER SUBMITTED: 2015-04-17
PAPER REVISED: 2015-11-10
PAPER ACCEPTED: 2015-11-19
PUBLISHED ONLINE: 2015-12-13
DOI REFERENCE: https://doi.org/10.2298/TSCI150417181G
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Issue 6, PAGES [2049 - 2064]
REFERENCES
  1. Rowe D.M., Thermoelectric waste as a renewable energy source, International Journal of Innovations in Energy Systems and Power,1 (2006),1, pp.13-23.
  2. Yu C., Chau K.T., Thermoelectric automotive waste heat energy recovery using maximum power point tracking, Energy Conversion and Management, 50 (2009), 6, pp.1506-1612.
  3. Rowe D.M, Thermoelectrics Handbook Macro to Nano, CRC Press Taylor & Francis Group, New York, USA, 2006.
  4. LeBlanc S.,Thermoelectric generators: Linking material properties and systems engineering for waste heat recovery applications, Sustainable Materials and Technologies,1 (2014),2, pp.26-35.
  5. Yang J., Potential applications of thermoelectric waste heat recovery in the automotive ındustry, Proceedings, International Conference on Thermoelectrics 19-23 June 2005, pp.1170-174.
  6. Alexander B., et al., Alphabet Energy: thermoelectrics and market entry, California Management Review, 55 (2012),1,pp.149-160.
  7. Shawwaf A., Optimization of the electrical properties of thermoelectric generators Master Thesis, Lund University, Lund, Sweden, 2010.
  8. Yadav G.G., et al., Nanostructure-based thermoelectric conversion: an insight into the feasibility and sustainability for large-scale deployment, Nanoscale, 3 (2011), 9, pp.3555-3562.
  9. Cadoff I.B., Miller E., Thermoelectric materials and devices, Reinhold Publishing Corporation, New York, USA, 1960.
  10. Riffat S.B., Ma Xiaoli, Thermoelectrics: a review of present and potential applications, Applied Thermal Engineering 23, (2003), 8, pp.913-935.
  11. Rowe D.M., Thermoelectrics, an environmentally friendly source of electrical power, Renewable Energy 16, (1999), pp.1251-1265.
  12. Yee S.K., et al., $ per W metrics for thermoelectric power generation: beyond ZT, Energy & Environmental Science 6, (2013), pp. 2561-2571.
  13. Yazawa K., Shakouri A., Optimization of power and efficiency of thermoelectric devices with asymmetric thermal contacts, Journal of Applied Physics 111, 024509 (2012).
  14. Mayer P.M., Ram R.J., Optimization of heat sink-limited thermoelectric generators, Nanoscale and Microscale Thermophysical Engineering 10, (2006), pp.143-155.
  15. Conklin J.C., Szybist J.P., A highly efficient six-stroke internal combustion engine cycle with water injection for in-cylinder exhaust heat recovery, Energy 35, (2010), 4, pp.1658-1664.
  16. Stobart R., Weerasinghe R., Heat recovery and bottoming cycles for SI and CI engines a perspective, SAE Paper: 2006-01-0662.
  17. Stobart R., et al., The potential for thermoelectric devices in passenger vehicle applications, SAE Paper:2010-01-0833.
  18. Birkholtz U., et al., Conversion of waste exhaust heat in automobile using FeSi2 thermoelements, In Proceedings of 7th IEEE International Conference on Thermoelectric Energy Conversion, 16-18 March (1988), Arlington, USA.
  19. Ramade P., et al., Automobile Exhaust Thermo-Electric Generator Design & Performance Analysis, International Journal of Emerging Technology and Advanced Engineering 4, (2014), 5, 682-691.
  20. Chen L., Li J., Sun F., Wu C., Performance optimization of a two stage semiconductor thermoelectric-generator, Applied Energy 82, (2005), pp.300-312.
  21. Hendricks T.J., Integrated thermoelectric thermal system resistance optimization to maximize power output in thermoelectric energy recovery systems, Materials Research Society Proceedings 1642 (2014).
  22. Kumar C. R, et al., Experimental Study on Waste Heat Recovery From an Internal Combustion Engıne Using Thermoelectric Technology, Thermal Science 15, (2011),4, pp. 1011-1022
  23. Savelli G., et al., Energy Conversion Using New Thermoelectric Generator, Proceedings, DTIP of MEMS and MOEMS, Stresa, Italy, 2006.
  24. Kuo K.K, Principles of combustion, John Wiley & Sons, Inc., Hoboken, (2005), New Jersey, USA.
  25. Heywood J.B., Internal combustion engine fundamentals, McGraw-Hill, (1988), New York, USA.
  26. Glassman I., Yetter R.A., Combustion, Academic Press, (1996), San Diego, USA.
  27. Jinhua W., et al., Numerical study of the effect of hydrogen addition on methane-air mixtures combustion, International Journal of Hydrogen Energy 34, (2009), 2, pp.1084-1096.
  28. Schefer R.W., Hydrogen enrichment for improved lean flame stability, International Journal of Hydrogen Energy 28, (2003), 10 , pp. 1131-1141.
  29. Choi G. H., et al., Performance and emissions characteristics of a hydrogen enriched LPG internal combustion engine at 1400 rpm, International Journal of Hydrogen Energy 30, (2005), 1, pp. 77- 82
  30. Shirk M.G., et al., Investigation of a hydrogen-assisted combustion system for a light-duty diesel vehicle, International Journal of Hydrogen Energy 33, (2008), 23, pp.7237-7244.
  31. Kumar M.S., et al., Use of hydrogen to enhance the performance of a vegetable oil fuelled compression ignition engine, International Journal of Hydrogen Energy 28, (2003),10, pp.1143-1154.
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Experimental investigation of an improved exhaust recovery system for liquid petroleum gas fueled spark ignition engine

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence