Yasar Demirel

Yasar Demirel 

Yasar Demirel
Contact Information:
207K OTHM
Lincoln: City Campus
(402) 472-2745
ydemirel2@unl.edu
Email   
Personal Links:
Professional Memberships:

Associate Professor
  • Ph.D., University of Birmingham, Birmingham, UK, 1981
  • Dipl. Adv. Chem. Eng., University of Manchester, UMIST, UK, 1977
  • B.S. & M.S., Hacettepe University, Ankara, Turkey, 1975

Areas of Research and Professional Interest
  • Energy
  • Biomass extraction and refinery towards integrated biorefinery to produce biofuel, bioproducts (bio-oil), and power
  • Thermodynamic analysis of energy systems - Sustainable energy management
  • Renewable energy and storage
  • Enhancement in heat transfer
Courses Taught


Experience

  • Associate Professor Dept. of Chemical and Biomolecular Engineering, Lincoln, NE, 2006-
  • Visiting Professor Dept. of Chemical Engineering, Virginia Tech, Blacksburg, VA, 2002-2006.
  • Visiting Scholar Dept. of Chemical Engineering, University of Delaware, DE, 1999-2001, Dept. of Chemical Engineering, University of Birmingham, UK, 1982, 1992.
  • Full Professor Dept. of Chemical Engineering, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, Saudi Arabia, 2001.
  • Associate Professor College of Art and Science, Çukurova University, Turkey, 1986, Dept. of Chemical Engineering, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, Saudi Arabia, 2001.
  • Assistant Professor College of Art and Science, Çukurova University, Turkey, 1981-1986.
Research Projects:
  • Production of propylene carbonate and poly (propylene carbonate) from propylene oxide and carbon dioxide.
    Yasar Demirel (PI) and Hossein Noureddini, 2010, $20,000.
Accomplishments:
  • Book: “Nonequilibrium Thermodynamics: Transport and Rate Processes in Physical, Chemical and Biological Systems,” 2nd ed., Elsevier, Amsterdam, 2007.
  • Book: “Energy: Production, Conversion, Storage, Conservation, and Coupling,” Springer, 2012.
  • Books & book contributions: 5, Journal articles: 77. Technical presentations: 43
  • Graduate students advised: 8
  • Funded projects: 9
  • Extensive teaching and research experience in various prestigious institutions
  • Member of editorial board of International Journal of Exergy (IJEX)

Honors and Awards

  • Distinguished Researcher Award: 1998-1999 King Fahd University of Petroleum & Minerals ·
  • Scholarship: British Council, 1992
  • Grant: NATO ASI, 1989
  • Fellowship: UNESCO, 1982
  • Government grant for graduate studies: 1976-1981

Selected Publications

Books and Book Contributions:
  1. Demirel, Y., Energy: Production, Conversion, Storage, Conservation, and Coupling, Springer, Berlin Heidelberg, 2012.
  2. Demirel, Y., Information and Living Systems in ‘The Ashgate Companion to Contemporary Philosophy of Biology,’ Eds. G. Terzis, R. Arp, MIT Press, Cambridge, 2010.
  3. Demirel, Y., Nonequilibrium Thermodynamics: Transport and Rate Processes in Physical, Chemical and Biological Systems, 2nd ed., Elsevier, Amsterdam, 2007. http://elsevier.com/wps/find/bookdescription.cws_home/712145/description#description
  4. Demirel, Y., Heat Storage by Phase Changing Materials and Thermoeconomics, in Thermal Energy Storage for Sustainable Energy Consumption, H.O. Paksoy, ed., Springer, 2007. pp 133-151.
  5. Demirel, Y., Nonequilibrium Thermodynamics: Transport and Rate Processes in Physical and Biological Systems, Elsevier, Amsterdam, 2002.
Refereed Journal Articles:
  1. Tevatia, R., Demirel, Y. Blum, P., Kinetic Modeling of Photoautotropic Growth and Neutral Lipid Accumulation in terms of Ammonium Concentration in Chlamydomonas reinhardtii, Bioresource Technology, in print, 2012.
    Demirel, Y., Thermodynamics Analysis-Review, The Arabian Journal for Science and Engineering, in print, 2012.
  2. Nguyen, N., Demirel, Y., A novel biodiesel and glycerol carbonate production plant, Int. Journal of Chemical Reactor Engineering, 9, 2011, 1-25.http://www.bepress.com/ijcre/vol9/A108
  3. Nguyen, N., Demirel, Y., Using thermally coupled reactive distillation columns in biodiesel production. Energy 36, 2011 4838-4847.
  4. Demirel, Y., Nonequilibrium thermodynamics modeling of coupled biochemical cycles in living cells, J. Non-Newtonian Fluid Mech., in press (2010).
  5. Nguyen, N., Demirel, Y., Retrofit of distillation columns in biodiesel production plants, Energy, The Int. Journal, 35, 2010, 1625-1632.
  6. Kumar, A., H., Demirel, Y., Jones, D.D., Hanna, M.A., Optimization and economic evaluation of industrial gas production and combined heat and power generation from gasification of corn stover and distillers grains, Bioresource Technology, 101, 2010, 3696-3701.
  7. Kumar, A., Noureddini, H., Demirel, Y., Jones, D.D., Hanna, M.A., Simulation of corn stover and distillers grains gasification with Aspen Plus, Transaction of ASABE, 52, 2009,1989-1995.
  8. Demirel, Y., Thermodynamically coupled heat and mass flows in a reaction-transport system with external resistances, International Journal of Heat and Mass Transfer , 52, 2009, 2018-2025. http://www.sciencedirect.com/scidirimg/clear.gifdoi:10.1016/j.ijheatmasstransfer.2008.10.030
  9. Demirel, Y., Thermodynamically coupled transport in simple catalytic reactions, International Journal of Chemical Reactor Engineering, 6, 2008, 1-22. http://www.bepress.com/ijre/vol6/A82.
  10. Demirel, Y., Modeling of Thermodynamically Coupled Reaction-Transport Systems, Chemical Engineering Journal, 139, 2008, 106-117. http://www.sciencedirect.com/scidirimg/clear.gifdoi:10.1016/j.cej.2007.07.079
  11. Demirel, Y., Ozturk, H.H., Thermoeconomics of Seasonal Heat Storage System, International Journal of Energy Research, 30, 2006, 1001-1012.
  12. Demirel, Y. Assessment of Thermodynamic Performances for Distillation Columns, International Journal of Exergy, 3, 2006, 345-361.
  13. Demirel, Y. Retrofit of Distillation Columns by Thermodynamic Analysis, Separation Science and Technology, 41, 2006, 791-817.http://digitalcommons.unl.edu/chemengphysprop/6
  14. Demirel, Y., Non-isothermal Reaction Diffusion Systems with Thermodynamically Coupled Heat and Mass Transfer, Chemical Engineering Science, 61, 2006, 3379-3385. http://digitalcommons.unl.edu/chemenganalytical/2
  15. Gecegormez, H., Demirel, Y., Phase Stability Analysis Using Interval Newton Method with NRTL Model, Fluid Phase Equilibria, 237, 2005, 48-58.
  16. Demirel, Y., Stability of Transport and Rate Processes, International Journal of Thermodynamics, 8, 2005, 1-14.
  17. Demirel, Y., Thermodynamic Analysis of Separation Systems, Separation Science and Technology, 39, 2004, 3897-3942.http://digitalcommons.unl.edu/chemengthermalmech/2
  18. Demirel, Y., Teaching Coupled Transport and Rate Processes, Chemical Engineering Education, 38, 2004, 254-261.
  19. Demirel Y., Sandler, S.I., Nonequilibrium Thermodynamics in Engineering and Science, Journal of Physical Chemistry B, 108, 2004, 31-43.
  20. Demirel, Y., Exergy Use in Bioenergetics, International Journal of Exergy, 1, 2004, 128-146.
  21. Demirel, Y., Workbook Strategy in Engineering Education, World Transactions on Engineering and Technology Education, 3, 2004, 53-56.
  22. Demirel, Y., Teaching Engineering Courses with Workbooks, Chemical Engineering Education, 38, 2004, 74-80.
  23. Ozturk, H.H., Demirel, Y., Exergy-Based Performance Analysis of Packed Bed Solar Air Heaters, International Journal of Energy Research, 28, 2004, 423-432.
  24. Demirel, Y., Sandler, S.I., Thermodynamics and Bioenergetics. Biophysical Chemistry, 97, 2002, 87-111.
  25. Demirel, Y., Sandler, S.I., Effects of Concentration and Temperature on the Coupled Heat and Mass Transport in Liquid Mixtures, International Journal of Heat and Mass Transfer, 45, 2002, 75-86.
  26. Demirel, Y., Sandler, S.I., Linear-Nonequilibrium Thermodynamics Theory for Coupled Heat and Mass Transport, International Journal of Heat and Mass Transfer, 44, 2001, 2439-2451.
  27. Demirel, Y., Thermodynamic Analysis of Thermomechanical Coupling in Tangential Couette Flow of Temperature Dependent Materials, International Journal of Exergy, 1, 2001, 53-59.
  28. Demirel, Y., Thermodynamic Analysis of Thermomechanical Coupling in Couette Flow, International Journal of Heat and Mass Transfer, 43, 2000, 4205-4212.
  29. Demirel, Y., Kahraman, R., Thermodynamic Analysis of Convective Heat Transfer in an Annular Packed Bed, International Journal of Heat and Fluid Flow, 21, 2000, 442-448.
  30. Demirel, Y., Sharma, R.N., Al-Ali, H.H., On the Effective Heat Transfer Parameters in a Packed Bed, International Journal of Heat and Mass Transfer, 43, 2000, 327-332.
  31. Demirel, Y., Abu-Al-Saud, B.A., Al-Ali, H.H., Makkawi, Y., Packing Size and Shape Effects on Forced Convection in Large Rectangular Packed Ducts with Asymmetric Heating, International Journal of Heat and Mass Transfer. 42, 1999, 3267-3277.
  32. Demirel, Y., Kahraman, R., Entropy Generation in a Rectangular Packed Duct with Wall Heat Flux, International Journal of Heat and Mass Transfer, 42, 1999, 2337-2344.
  33. Demirel, Y., Irreversibility Profiles in a Circular Couette Flow of Temperature Dependent Materials, International Communication of Heat and Mass Transfer, 26, 1999, 75-83.
  34. Demirel, Y., Al-Ali, H.H., Abu-Al-Saud, B.A., Enhancement of Convection Heat-Transfer in a Rectangular Duct, Applied Energy, 64, 1999, 441-451.
  35. Demirel, Y., Estimation of the Entropy of Vaporization at the Normal Boiling Point for Azeotropic Mixtures Containing Water, Alcohol or Acetic acid, Thermochimica Acta, 339, 1999, 79-85.
  36. Bascetincelik, A., Ozturk, H.H., Paksoy, H.O., Demirel, Y., Energetic and Exergetic Efficiency of Latent Heat Storage System for Greenhouse Heating, Renewable Energy, 16, 1999, 691-694.
  37. Demirel, Y., Irreversibility Distribution for a Pure Convection Case of the Smith-Hutton Problem, International Communication of Heat and Mass Transfer, 25, 1998, 671-679.
  38. Makkawi, Y., Demirel, Y., Al-Ali, H.H., Numerical Analysis of Forced Convection Heat Transfer in a Rectangular Packed Duct with Asymmetric Heating, Energy Conversion and Management, 39, 1998, 455-463.
  39. Demirel, Y., Paksoy, H.O., Calculations of Thermodynamic Derivative Properties from the NRTL and UNIQUAC Models, Thermochimica Acta, 303, 1997, 129-136.
  40. Demirel, Y., Al-Ali, H.H., Thermodynamic Analysis of Convective Heat Transfer in a Packed Duct with Asymmetrical Wall Temperatures, International Journal of Heat and Mass Transfer, 40, 1997, 1145-1153.
  41. Demirel, Y., Al-Ali, H.H., Abu-Al-Saud, B.A., Entropy Generation of Convection Heat Transfer in an Asymmetrically Heated Packed Duct, International Communication of Heat and Mass Transfer, 24, 1997, 381-390.
  42. Paksoy, H.O., Ornektekin, S., Balci, B., Demirel, Y., The Performance of UNIFAC and Related Group Contribution Models Part I. Prediction of Infinite Dilution Activity Coefficients, Thermochimica Acta, 287, 1996, 251-259.
  43. Ornektekin, S., Paksoy, H.O., Demirel, Y., The Performance of UNIFAC and Related Group Contribution Models Part II. Prediction of Henry’s Law Constant, Thermochimica Acta, 287, 1996, 235-249.
  44. Demirel, Y., Saxena, S.C., Heat Transfer Through a Low Pressure Gas Enclosure as a Thermal Insulator: Design Considerations, International Journal of Energy Research, 20, 1996, 327-338.
  45. Demirel, Y., Saxena, S.C., Heat Transfer in Rarefied Gas at a Gas-Solid Interface, Energy, 21, 1996, 99-103.
  46. Demirel, Y., Thermodynamic Optimization of Convective Heat Transfer in a Packed Duct, Energy, 20, 1995, 959-967.
  47. Demirel, Y., Fundamental Thermodynamic Surfaces for Alkanol-Alkane Binary Mixtures by the NRTL Model, Fluid Phase Equilibria, 106, 1995, 27-45.
  48. Demirel, Y., Paksoy, H.O., Excess Heat Capacity Surfaces for Water-Alkanol Mixtures by the UNIQUAC Model, Industrial Engineering & Chemistry Research, 34, 1995, 921-927.
  49. Demirel, Y., Hamad, E.Z., Excess Enthalpy Surfaces for Alkanol-Alkane Mixtures by the UNIQUAC Model, Thermochimica Acta, 260, 1995, 51-74.
  50. Demirel, Y., Paksoy, H.O., Excess Enthalpy Surfaces for n-Heptane + Carboxylic Acid, Amyl amine and n-Octanol Mixtures by the NRTL Model, Thermochimica Acta, 261, 1995, 33-45.
  51. Demirel, Y., Calculation of Excess Entropy for Binary Liquid Mixtures by the NRTL and UNIQUAC Models, Industrial Engineering & Chemistry Research, 33, 1994, 2875-2878.
  52. Demirel, Y., On the Calculation of Azeotropes from the NRTL and UNIQUAC Models, Fluid Phase Equilibria, 86, 1993, 1-13.
  53. Demirel, Y., Correlation of Heats of Mixing of Liquid Mixtures by the NRTL Model, Thermochimica Acta, 219, 1993, 83-96.
  54. Demirel, Y., Paksoy, H.O., Thermal Analysis of Heat Storage Materials, Thermochimica Acta, 213, 1993, 211-221.
  55. Demirel, Y., Gecegörmez, H., Paksoy, H. O., Correlation of Heat of Mixing Data by the NRTL and UNIQUAC Models. 1. Estimation of the Model Parameters, Thermochimica Acta, 194, 1992, 329-341.
  56. Demirel, Y., Paksoy, H.O., Calculation of Excess Heat Capacity for Liquid Mixtures, Thermochimica Acta, 198, 1992, 329-344.
  57. Demirel, Y., Paksoy, H.O., Gecegörmez, H., Correlation of Heats of Mixing Data by the NRTL and UNIQUAC Models. 2. Prediction of the Calorimetric Properties, Thermochimica Acta, 194, 1992, 343-359.
  58. Demirel, Y., Gecegörmez, H., Simultaneous Representation of Excess Enthalpy and Vapor-Liquid Equilibrium Data by the NRTL and UNIQUAC Models, Fluid Phase Equilibria, 65, 1991, 111-133.
  59. Demirel, Y., Dayan, A., On the Performance of Original and Modified UNIFAC Models in Vapor-Liquid Equilibrium Predictions, Doga Turkish Journal of Chemistry, 15, 1991, 115-122.
  60. Demirel, Y., Gecegörmez, H., On the Performance of the NRTL and UNIQUAC Models with Temperature Dependent Parameters, Islamabad Journal of Science, 10, 1990, 69-75.
  61. Demirel, Y., Calculation of Enthalpy of Mixing at Infinite Dilution by the NRTL and UNIQUAC Models with Temperature Dependent Parameters, Thermochimica Acta, 170, 1990 197-208.
  62. Demirel, Y., Calculation of Infinite Dilution Activity Coefficient by the NRTL and UNIQUAC Models, Canadian Journal of Chemical Engineering, 68, 1990, 697-701.
  63. Demirel, Y., Gecegörmez, H., Simultaneous Correlation of Excess Gibbs Energy and Enthalpy of Mixing by the UNIQUAC Equation, Canadian Journal of Chemical Engineering, 67, 1989, 455-461.
  64. Demirel, Y., Experimental Investigation of Heat Transfer in a Packed Duct with Unequal Wall Temperatures, Experimental Thermal and Fluid Science, 2, 1989, 425-431.
  65. Öcal, M.E., Demirel, Y., Dündar, C., Haktanìr, T., Investigation of Heat Insulation Concrete Including Agricultural Waste, Doga Turkish Journal of Engineering and Environment, 13, 1989, 169-181.
  66. McDermott, C., Demirel, Y., Correlation of Solubility Data in Ternary Liquid Mixtures, Reviews in Inorganic Chemistry, 10, 1989, 226-233.
  67. Demirel, Y., McDermott, C., Distillation Simulation for Partially Miscible Systems, Chimica Acta Turcica, 15, 1987, 329-350.
  68. Demirel, Y., Kunç, S., Thermal Performance Study on a Solar Air Heater with Packed Flow Passage, Energy Conversion and Management, 27, 1987, 317-325.
  69. Paksoy, H.O., Demirel, Y., A Study of Heat Storage in Packed Beds, Doga Turkish Journal of Engineering and Environment, 11, 1987, 303-317.
  70. Demirel, Y., Quasi-Steady State Analysis of a Solar Air Heater, Doga Turkish Journal of Engineering and Environment, 11, 1987, 1-14.
  71. Demirel, Y., Thermal Performance Study of a Solar Air Heater, Doga Turkish Journal of Engineering and Environment, 10, 1986, 267-279.
  72. Demirel, Y., Basçetinçelik, A., Heat Storage and Regeneration for Agricultural Buildings, Doga Turkish Journal of Engineering and Environment, 10, 1986, 280-288.
  73. Demirel, Y., On the Multicomponent Diffusion Calculations by Means of the Maxwell-Stefan Equations, Chimica Acta Turcica, 14, 1986, 114-129.
  74. Kunç, S., Demirel, Y. Yegingil, I., Türkiyede Üretilen Günes Toplaçlarìnìn Verim Egrileri, Kimya Muhendisligi, 116, 1986, 29-34.
  75. Demirel, Y. Kunç, S., Asimetrik Isìtìlan bir Kanalda Konveksiyonla Isì Transferinin Deneysel Incelenmesi, Doga Turkish Journal of Engineering and Environment, 9, 1985, 34-40.
  76. Demirel, Y., McDermott, C., Prediction of Phase Behavior and Bubble Point of Partially Miscible Systems, Chimica Acta Turcica, 12, 1984, 173-188.
  77. Demirel, Y., Comparison of New Molecular Models in Fluid Phase Equilibria Predictions, Chimica Acta Turcica, 10, 1982, 197-206.
  78. Kunç, S. Demirel, Y., Havalì Günes Toplacì, Çukurova Universitesi Fen-Edebiyat Fakültesi Yìllìgì, 1-2, 1982, 52-61.
Refereed Technical Presentations:
  1. Nguyen, N., Demirel, Y., Gleycerol carbonate production,  2012 National Conference: Science for Biomass Feedstock Production  and Utilization, October 2-5 2012 New Orleans, LA.
  2. Demirel, Y. Self-identification of objectives and self-assessment will improve engagement and learning, Symposium on “ Enhancing Learning and Teaching at UNL: Looking back and Forward” February 10, 2011, Lincoln, NE.
  3. Nguyen, N., Demirel, Y., Reactive distillation column for esterification of lauric acid with methanol: Equilibrium versus nonequilibrium approaches, AIChE Annual Meeting, November 7-12, 2010, Salt Lake City, UT.
  4. Nguyen, N., Sim, J., Demirel, Y., Bioethanol dehydration in thermally integrated extractive distillation columns, AIChE’s Annual Meeting, November 7-12, 2010, Salt Lake City, UT.
  5. Nguyen, N., Demirel, Y., Carboxylation of glycerol in a biodiesel plant, AIChE’s Annual Meeting, November 7-12, 2010, Salt Lake City, UT.
  6. Demirel, Y., Noureddini, H., Process development for manufacturing propylene carbonate and poly(propylene carbonate) from propylene oxide and carbon dioxide, Frontiers in Biorefining: Biobased Products from Renewable Carbon, October 19-22, 2010, St. Simons Island, GA.
  7. Demirel, Y. Properties of thermodynamic coupling between chemical and transport processes with external resistances, 17 th Syp., Thermophysical Properties, June, 2009, Boulder CO.
  8. Kumar, A., Demirel, Y., Jones, D., Hanna, M., Simulation of biomass gasification using Aspen Plus, 2009 Mid-Central ASABE Meeting- Technical Session, April, 2009, Iowa State University.
  9. Demirel, Y., Modular Teaching and Open Ended Design Projects, AIChE’s Annual Meeting, November 16-21, 2008, Philadelphia, PA.
  10. Demirel, Y., Modeling of Active Transport, AIChE’s Annual Meeting, November 16-21, 2008, Philadelphia, PA.
  11. Demirel, Y., Retrofit of distillation columns in a methanol plant, AIChE’s Annual Meeting, November 16-21, 2008, Philadelphia, PA.
  12. Demirel, Y. Heat Storage by Phase Changing Materials and Thermoeconomics, Thermal Energy Storage for Sustainable Energy Consumption (TESSEC), NATO ASI, June 6-17, 2005, Cesme, Izmir Turkey.
  13. Demirel, Y., Modular Teaching and Product Design Projects in Capstone Design ASEE SE Section Annual Conference, April 3-5, 2005, University of Tennessee at Chattanooga, TN.
  14. Demirel, Y., Use of Nonequilibrium Thermodynamics in Science and Engineering, AIChE’s Annual Meeting, November 7-12, 2004, Austin, TX.
  15. Demirel, Y., Coupled Heat and Mass Transfer with Chemical Reaction, AIChE’s Annual Meeting November 7-12, 2004, Austin, TX.
  16. Demirel, Y., Teaching Styles and Workbook Strategy in Engineering Education, AIChE’s Annual Meeting, November 7-12, 2004, Austin, TX.
  17. Demirel, Y., Modular Teaching Experience in Capstone Design, AIChE’s Annual Meeting, November 7-12, 2004, Austin, TX.
  18. Demirel, Y., Workbook Strategy and Active Learning Experience in Engineering Education, 34th Annual Conference of the International Society for Exploring Teaching and Learning, October 14-16, 2004, Baltimore, MD.
  19. Demirel, Y., Effective Teaching and Active Learning of Engineering Courses with Workbooks, ASEE Annual Conference & Exposition, Session 3213, June 20-23, 2004, Salt Lake City, UT.
  20. Demirel, Y., Teaching Chemical Engineering Courses with Workbook Strategy, ASEE, SE Section, Annual Conference, April, 4-6, 2004, Auburn, AL.
  21. Demirel, Y., Thermodynamic Analysis of Separation Processes, Thirteenth Symposium on Separation Science and Technology for Energy Applications, October 27-30, 2003, Gatlinburg, TN.
  22. Demirel, Y., Nonequilibrium Thermodynamics and Stability Analysis of Transport and Rate Processes, 3rd International Workshop on Nonequilibrium Thermodynamics and Complex Fluids, August 14-17, 2003, Princeton, NJ.
  23. Demirel, Y., Nonequilibrium Thermodynamics and Coupled Transport in Membranes, AIChE’s Annual Meeting, November 12-17, 2000, Los Angeles, CA.
  24. Demirel, Y., Sandler, S.I., Coupled Heat and Mass Transport in Binary and Ternary Liquid Mixtures, AIChE’s Annual Meeting, November 12-17, 2000, Los Angeles, CA.
  25. Ozturk, H.H., Bascetincelik, A., Demirel, Y., Paksoy, H.O., Thermal Analysis of Packed Solar Heaters, Proceedings, Sun Day Symposium 99, p.43-46, 23-27 June 1999, Kayseri, Turkey.
  26. Demirel, Y., Nonequilibrium Thermodynamics in Second Law Analysis for Transport Phenomena and Chemical Reactors, AIChE’s Annual Meeting, October 31 to November 5, 1999, Dallas, TX.
  27. Demirel, Y., Fundamental Thermodynamic Surfaces for Binary Liquid Mixtures by the NRTL and UNIQUAC Models, AIChE’s Annual Meeting, November 15-20, 1998, Miami Beach, FL.
  28. Demirel, Y., Al-Ali, H.H., Abu-Al-Saud, B.A., Convection Heat Transfer in a Large Packed Duct with Asymmetrical Heating, 7th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, June 15-18, 1998, Albuquerque, NM.
  29. Bascetincelik, A., Paksoy, H.O., Ozturk, H.H., Demirel, Y., Seasonal Heat storage System for Greenhouse Heating. Annex 10-Phase Change Materials and Chemical Reactions for Thermal Energy Storage, International Energy Agency, First Workshop, April 16-17, 1998, Adana, Turkey, 93-103.
  30. Demirel, Y., Al-Ali, H.H., Abu-Al-Saud, B.A., Volumetric Entropy Generation of Convective Heat Transfer in an Asymmetrically Heated Packed Duct. 4th International Symposium on Heat Transfer with Exhibition (ISHT), October 7-11, 1996, Beijing, China, Heat Transfer Science and Technology, Ed. Wang Buxuan, 520-525.
  31. Demirel, Y., Thermodynamic Analysis of Convective Heat Transfer in an Asymmetrically Heated Duct. TIEES-96, First Trabzon International Energy and Environment Symposium, July 29-31, 1996, Trabzon, Turkey, 623-627.
  32. Demirel, Y., Thermodynamic Analysis of the Forced Convection Heat Transfer in a Packed Duct. Second Annual One day Technical Exchange Symposium (SAS-AIChE) June 28, 1995, Dhahran, Saudi Arabia, 1-15.
  33. Paksoy, H.O., Demirel, Y., Determining Thermal Properties of Hybrid Storage Materials. Calorstock’94, 6th International Conference on Thermal energy Storage, August 22-25, 1994, Espoo, Finland, 397-402.
  34. Paksoy, H.O., Demirel, Y., Bascetincelik, A. Yegingil, I., Preliminary Design of Central Solar Heating Systems with Seasonal Storage in Turkey. Calorstock’94, 6th International Conference on Thermal energy Storage, August 22-25, 1994, Espoo, Finland, 697-704.
  35. Demirel, Y., Paksoy, H.O., A Simple Method for Testing Thermal Properties of Heat Storage Materials. ITEC-93, First International Thermal Energy Congress, June 6-10, 1993, Marrakesh, Morocco, 363-366.
  36. Demirel, Y., Bascetincelik, A., Paksoy, H.O., Oztekin, S., The Use of Seasonal Heat Storage in Greenhouse Air Conditioning. ITEC-93, First International Thermal Energy Congress, June 6-10, 1993, Marrakesh, Morocco, 889-892.
  37. Paksoy, H.O., Demirel, Y., Integration of Heat Pump and Heat Storage in Utilizing the Waste Heat. ITEC-93, First International Thermal Energy Congress, June 6-10, 1993, Marrakesh, Morocco, 527-530.
  38. Demirel, Y., The Impact of Computer Technology on Developments, International Symposium on Transfer of Computer Technology, November 23-25, 1987, Amman, Jordan, 123-128.
  39. Demirel, Y., Pakdil, E., UNIFAC Modelinin Kimyasal Proses Hesaplamalarìnda Kullanìlmasì. 2. Ulusal Bilgisayar Destekli Tasarìm Sempozyumu, Nisan 28-30, 1986, Izmir, Turkey. Bildiriler Kitabi Editor: B. Kuryel, 112-119.
  40. Basçetinçelik, A., Demirel, Y., Waste Heat Utilization Possibilities for Greenhouse Heating in Çukurova Region, Proceeding of the first Workshop of Heat Recovery Systems in Agricultural Buildings. 11-13 September 1985, Ghent, Belgium. Edited by M. Debruyckere, A. Ninolaus, W. Van Der Bient and L. Balemans, CNRE Bulletin No. 11, 25-27.
  41. Demirel, Y., Kunç, S., Paksoy, H.O., Packed Duct Model for Use in Solar Air Collectors. 3rd International Congress: New Energy Source and Exhibition, 25-27 June 1984, Istanbul-Turkey, 167-177.
  42. Demirel, Y., Kunc, S., Eskut, E., Yeni bir Havali Gunes Toplaci Modeli. EIE Gunes Enerjisi Konferansi Tebligleri, 16-18 Mayis 1984, Ankara, Turkey, 1-18.
  43. Kunc, S., Demirel, Y., Secimli Yuzeyler ve Duzlemsel Toplaclar icin bir Model. EIE Gunes Enerjisi Konferansi Tebligleri, 16-18 Mayis 1984, Ankara, Turkey, 19-33.
  44. Kunç, S., Demirel, Y., Uysal, Y., Eker, A., Black Nickel Coated Surface for Flat-Plate Solar Collector. Proceedings of First Arab International Solar Energy Conference, 2-8 December 1983, Kuwait. Edited by H.Alawi, A. Al. Jassar, Al. Juwayhel and A. A. M. Sayigh, Pergamon Press, Oxford, 125-128.

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