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Dissertation
J.C. Ordonez, Integrative Energy-System Design: System Structure from Thermodynamic Optimization. Ph.D. Thesis, Duke University, Durham, NC, 2003.

Thesis
J.C. Ordonez, Entropy Generation Minimization in Thermal Energy Storage Systems with Phase Change. M.S. Thesis, Univ. Pontificia Bolivariana, Medellin,Colombia, 2001.

Honors Thesis
J.C. Ordonez, and A. Rivera, Introduction to Thermoacoustics. B.S. Honors Thesis, Univ. Pontificia Bolivariana, Medellin, Colombia, 1996.


Refereed Journal Articles Submitted


Refereed Journal Articles In Press

1.    1.    J.V.C. Vargas, J.C. Ordonez, E. Dilay and J.A. Parise, “Modeling, simulation and optimization of a solar collector driven water heating and absorption cooling plant,” Solar Energy, 2009.

2.    J. V. C. Vargas, M. L. Brioschi, M. B. Parolin, F. A. Mulinari-Brenner, J. C. Ordonez and D. Colman, “Normalized methodology for medical infrared imaging,” Infrared Physics & Technology 52,42–47, 2009.

3.    L. S. Martins, J. E. F. C. Gardolinski, J. V. C. Vargas, J. C. Ordonez, S. C. Amico and M. M. C. Forte, ”The Experimental Validation of a Simplified PEMFC Simulation Model for Design and Optimization Purposes,” Applied Thermal Engineering, 2009 (In press)

4.    J.C. Ordonez, J.V. C. Vargas and R. Hovsapian, “Modeling and Simulation of the Thermal and Psychrometric Transient Response of All Electric Ships, Internal Compartments and Cabinets," Transactions of the Society for Modeling and Simulation International, 2008

5.    J. A. Souza, J. V. C. Vargas, O. F. von Meien, W. Martignoni, J.C. Ordonez, The inverse methodology of parameter estimation for model adjustment, design, simulation, control and optimization of fluid catalytic cracking (FCC) risers, Journal of Chemical Technology and Biotechnology, 55 pages, In press, 2008


6.    T.E. Brinson, W. Ren, J.C. Ordonez, C.A. Luongo, and T. Baldwin, "Fuel Cell-Based Powertrain System Modeling and Simulation for Small Aircraft Propulsion Applications," Journal of Fuel Cell Science and Technology, 2008.


Refereed Journal Articles Published

1.    W. Wechsatol, S. Lorente, A. Bejan and J.C. Ordonez, Elemental T and Y Shapes of Tree Networks of Ducts with Various Cross-Sections, Journal of Hydraulic Engineering, Feb. 2009


2.    R. Hovsapian, J.V. C. Vargas, J.C. Ordonez, A. Krothapalli, J.A. R. Parise, J.C. Berndsen. Thermodynamic Optimization of a Solar System for Cogeneration of Water Heating and Absorption Cooling, International Journal of Energy Research, 2008

3.    R. L. S. Mainardes, R. S. Matos, J. V. C. Vargas, and J.C. Ordonez, “Erratum: Optimally Staggered Finned Circular and Elliptic Tubes in Turbulent Forced Convection,” Journal of Heat Transfer,  vol. 129, no.5, pp. 674-678, 2007

4.    D. Vlassov, J. V. C. Vargas, and J.C. Ordonez, "The optimization of rough surface supersonic nozzles," Acta Astronautica, vol. 61, pp. 866-872, 2007

5.    A.M. Morega, J.C. Ordonez, J.V.C. Vargas and S. Kosaraju, “A Finite Element Method Analysis and Optimization of a Polymer Electrolyte Membrane Fuel Cell with Interdigitated Flow Field Design,” International Journal of Energy Technologies and Policy, Special Issue: Computational Fluid Dynamics Simulations in Energy Technologies and Processes, 2007

6.    R. L. S. Mainardes, R. S. Matos, J. V. C. Vargas, and J.C. Ordonez, “Optimally staggered finned circular and elliptic tubes in turbulent forced convection," Journal of Heat Transfer, vol. 129, pp. 674-678, 2007

7.    P. J. Masson, P. Tixador, J.C. Ordonez, A. M. Morega, and C. A. Luongo, "Electro-thermal model for HTS motor design," IEEE Transactions on Applied Superconductivity, vol. 17, pp. 1529-1532, 2007

8.    J.C. Ordonez, S. Chen, J. V. C. Vargas, F. G. Dias, J. Gardolinski, and D. Vlassov, "Constructal flow structure for a single SOFC," International Journal of Energy Research, vol. 31, pp. 1337-1357, 2007
Presents a model and a structured optimization a structured procedure to optimize the internal structure of a single solid oxide fuel cell (SOFC) so that the power density is maximized

9.    W.Wechsatol, J.C. Ordonez, and S. Kosaraju, Constructal Dendritic Geometry and the Existence of Asymmetric Trees," Journal of Applied Physics, vol. 100, pp.1-11, 2006.

10.    S. Chen, J.C. Ordonez, and J.V.C. Vargas, Transient Operation and Shape Optimization of a Single PEM Fuel Cell," Journal of Power Sources, vol. 162, no. 1, pp. 356-368, 2006
Extension of our work on fuel cell structure optimization to the transient regime. Relevant to transportation and other applications where fuel cell response time is essential

11.    D. Vlassov, J.V.C. Vargas, J.C. Ordonez and L.S. Martins, Turbulent Stress Distribution in the Turbulent Boundary Layer on a Permeable Porous Plate," Thermal Engineering, 2006

12.    E. Dialy, J.V.C. Vargas, S.C. Amico and J.C. Ordonez, Modeling, Simulation and Optimization of a Beer Pasteurization Tunnel," Journal of Food Engineering, vol. 77 pp. 500-513, 2006

13.    J.V.C. Vargas, J.C. Ordonez, and A. Bejan, “Constructal PEM Fuel Cell Stack Design," International Journal of Heat and Mass Transfer, vol. 48, pp. 4410-4427, 2005

14.    J.V.C. Vargas, J.C. Ordonez, C. Zamfirescu, M.C. Campos and A. Bejan, Optimal Ground Tube Length for Cooling of Electronis Shelters," Heat Transfer Engineering, vol. 26, pp. 8-20, 2005 
Theoretical, numerical and experimental study to investigate the optimization of the configuration (geometry) of underground heat exchangers for maximum heat transfer.

15.    J.V.C. Vargas, J.C. Ordonez, and A. Bejan, Constructal Flow Structure for a PEM Fuel Cell", International Journal of Heat and Mass Transfer, vol. 47, pp. 4177-4193, 2004

16.    J.C. Ordonez, A. Bejan and R.S. Cherry, Designed Porous Media: Optimally Nonuniform Flow Structures Connecting One Point With One Or More Points," International Journal of Thermal Sciences, vol. 42, pp. 857-870, 2003

17.    J.C. Ordonez, A. Bejan, “System-Level Optimization of the Size of Organs for Heat and Fluid Flow Systems," International Journal of Thermal Sciences, vol. 42, pp. 335-342, 2003

18.    J.C. Ordonez, A. Bejan, Minimum Power Requirement for Environmental Control of Aircraft," Energy, vol. 28, pp. 1183-1202, 2003

19.    F. Chejne, W.F. Florez, J.C. Ordonez, and E.A. Botero, “Exergoeconomic Analysis of Systems," Thermal Engineering (Teploenergetika), vol. 48, 2001

20.    J.C. Ordonez and A. Bejan, “Entropy Generation Minimization in Parallel-Plates Counter flow Heat Exchangers," International Journal of Energy Research, vol. 24, pp.843-864, 2000 

21.    J.V.C. Vargas, J.C. Ordonez, A. Bejan, Power extraction from a hot stream in the presence of phase change," International Journal of Heat and Mass Transfer, vol. 43, pp. 191-201, 2000

22.    J.C. Ordonez, J.V.C. Vargas and A. Bejan, “Combined Power and Refrigeration From a Hot Stream," International Journal of Applied Thermodynamics, vol. 2, pp. 49-57, 1999

23.    J.C. Rojas, F. Chejne, A. Hill, E. Figueroa, E. Botero, J.C. Perez, E. Arenas, C. Isaza, J.C. Ordonez, A. Rivera, K. Sanchez, J. Restrepo, J. Hinestrosa, M. Carmona, “Rational use of energy," Renewable Energy Journal, 15-16 (1998) 2383-2586.

24.    J.C. Ordonez, A. Rivera, F. Chejne, A. Hill, “Máquinas termoacusticas (Thermoacoustic Engines)," Revista Información Tecnológica, Centro de Información Tecnológica, La  Serena, Chile, No.5, 9 (1998)

25.    F. Chejne, J.C. Rojas, E. Botero, J.C. Ordonez, A. Rivera, J.A. Restrepo, A. Hill, “Administracion energetica en centrales de generacion de energía electrica mediante el monitoreo de variables (Energy Managment in Power Plants by Monitoring of Variables)," Revista Información Tecnológica, Centro de Información Tecnológica, La Serena, Chile. No.6, 9 (1998)

26.    F. Chejne, C.A. Isaza,  W.F. Florez , J.C. Ordonez, “Optimización de sistemas centralizados de refrigeración con modelización (Optimization of centralized refrigeration systems)," Energía y Computación, Revista de la Universidad del Valle, Colombia, 1998.

27.    F. Chejne, W.F. Florez, J.C. Ordonez, E.A. Botero, “Análisis Exergético de Centrales Térmicas (Exergetic Analysis of Thermal Power Plants,” Energética, vol.18, pp 33-41, 1998.


Invited Books Chapters Published

1.    A.M. Morega and J.C. Ordonez, “Multiphysics Modelling and Simulation in Engineering,” In: Recent Advances in Modelling and Simulation, I-Tech Education and Publishing KG, Vienna, Austria, EU. Pp. 337-360.

Refereed National and International Conference Papers/Proceedings — Published
Refereed- The term refereed when applied to proceedings, indicates that this paper requires formal peer review of  the draft manuscript by two or more reviewers.

Superscripts: * denotes MS student under my supervision, **denotes PhD student under my supervision, ∧ denotes postdoctoral fellow under my supervision, ° denotes frequent visiting research to my group

1.    J.V. C. Vargas°, J.C. Ordonez, R. Hovsapian** and F.G. Dias**, “Modeling, Simulation and Optimization of a Solar System for Water Heating and Absorption Cooling,” Proceedings of ES2008, ASME Energy Sustainability 2008, Jacksonville, FL, August 10-14, 2008 

2.    J.V. C. Vargas°, J.C. Ordonez, R. Hovsapian** and F.G. Dias**, “All electric ships, internal compartments and cabinets thermal and psychrometric simulation,” Grand Challenges in Modeling and Simulation, University of Edinburgh, Edinburgh, Scotland, June 16-19, 2008 

3.     A.M. Morega°, J. C. Ordonez, and M. Morega, A Constructal Approach to Power Distribution Networks Design, International Conference on Renewable Energy and Power Quality (ICREPQ,08), Santander, Spain, March 12-14, 2008 

4.    T. Chiocchio, R. Leonard, Y. Work, R. Fang, M. Steurer , A. Monti,  J. Khan, J. Ordonez, M. Sloderbeck, and S. L. Woodruff, A Co-Simulation Approach for Real-Time Transient Analysis of Electro-Thermal System Interactions on Board of Future All-Electric Ships, 2007 Summer Computer Simulation Conference (SCSC'07), San Diego, CA, July 2007 

5.    J.V.C. Vargas°, J.C. Ordonez and R. Hovsapian** , Modeling and Simulation of the Thermal and Psychrometric Transient Response of All Electric Ships, Internal Compartments and Cabinets, 2007 Summer Computer Simulation Conference (SCSC'07), San Diego, CA, July 2007 

6.    T.E. Brinson**, W. Ren, J.C. Ordonez, C.A. Luongo,  and T. Baldwin, "Fuel Cell-Based Powertrain System Modeling and Simulation for Small Aircraft  Propulsion Applications," Proc. of ASME Fifth International Conference on Fuel  Cell Science, Engineering, and Technology Book of Abstracts, June 18-20, Brooklyn, NY, 2007 

7.    D. Cartes, J.C. Ordonez, J. Harrington, D. Cox, and R. Meeker, “Novel Integrated Energy Systems and Control Methods with Economic Analysis for Integrated Community Based Energy Systems,” PES-IEEE, 2007 

8.    A.M. Morega°, J.C. Ordonez. A higher resolution, local thermal analysis of an ac armature winding of a high temperature superconductor motor, Paper IMECE2006-13825, 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE, Nov. 5-10, Chicago, Illinois, USA , 2006 

9.    W. Wechsatol^, S. Lorente, A. Bejan, J.C. Ordonez and S.C. Kosaraju**, “Optimization of Elemental Flow Passages of Fluid Flow Networks,” Proceedings of the 13th International Heat Transfer Conference, Sydney, Australia, 13-18 August, 2006

10.    A. Morega°, J.C. Ordonez, A.P. Negoias and R. Hovsapian** , “Spherical Photovoltaic Cells A Constructal Approach to their Optimization,” Proceedings of the 10th International Conference on Optimization of Electrical and Electronic Equipment, OPTIM’06, Brasov, Romania, May 18-19, 2006 

11.    A. Morega°, J.C. Ordonez and J.V.C. Vargas°. Thermal model for the AC armature winding of a High Temperature Superconductor airborne motor. ASME-IMECE. Orlando, November, 2005 

12.    J.C. Ordonez, J.V.C. Vargas° and S. Chen*. Optimal Heat Exchanger Area Allocation for Power and Refrigeration. 18th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems. ECOS, Trondheim, Norway, 2005 

13.    J. C. Ordonez and J.V.C. Vargas°.  Constructal Optimization of the Coupling Between a Hot and a Cold Stream for Power and Refrigeration. IMECE2004-62102.  ASME International Mechanical Engineering Congress and Exposition,  November 13-20, 2004, Anaheim, California USA.  (Nominated for the Edward F. Obert Award  of the Advanced Energy Systems Division ASME). 

14.    J. V. C. Vargas°, J.C. Ordonez and A. Bejan.  Fuel Cells Constructal Optimization and Research Perspectives. ASME. Second International Conference on Fuel Cell Science, Engineering and Technology. Rochester, NY, 2004 

15.    J.C. Ordonez and S. Chen*. Maximum Power Extraction from a Hot Stream in the Presence of Phase Change Under Limiting  Collecting Temperatures. Proceedings of HT-FED 2004. ASME Heat transfer/ Fluids Engineering Summer Conference, Charlotte, NC, 2004 

Non-refereed National and International Conference Papers/Proceedings — Published

  Note: All these papers are peer review in the sense that they have peer reviewed acceptance of a manuscript or abstact. However they do not meet the definition or refereed given above

Superscripts: * denotes MS student under my supervision, **denotes PhD student under my supervision, ∧ denotes postdoctoral fellow under my supervision, ° denotes frequent visiting research to my group

1.    J. C. Ordonez, H. Cortes*, T. Tracy**, Q. Straub*, “Hot Stream Energy Scavenging For Absorption Refrigeration,” XI International Environmental and Sustainable Development Seminar, Cartagena, Oct. 15-17, 2008

2.    F.G. Dias**, J.V.C. Vargas°, M.L. Brioshi, J.C. Ordonez and R. Hovsapian** , “Modeling and Simulation of the Heart Temperature Distribution in Cardiac Surgeries as a Function of the Coronary Blood Flow,” 12th Brazilian  Congress of Thermal Engineering and Sciences, Belo Horizonte, MG, Brazil, November 10-14, 2008 

3.    A.Morega°, J. C. Ordonez, J.V.C. Vargas°, C.A. Luongo, C. Shih, Engineering Education Solutions to a Global  Economy, International Conference on Engineering Education – ICEE 2007, Coimbra, Portugal, Sep 3-7, 2007 

4.    J. C. Ordonez , J.V.C. Vargas°,  A. Morega°,  C.A. Luongo, C. Shih, International Capstone Senior Design Projects, Fifth LACCEI International Latin American and Caribbean Conference for Engineering and Technology (LACCEI’2007) “Developing Entrepreneurial Engineers for the Sustainable Growth of Latin America and the Caribbean:  Education, Innovation, Technology and Practice” 29 May  – 1 June, Tampico, México, 2007 

5.    F.G. Dias**, J.V.C. Vargas°,M. Brioschi, J.C.  Ordonez, “A Thermodynamic Model to Predict Heart Thermal Response During Open Chest Procedures,” 19th International Congress of Mechanical Engineering, 5th to 9th of November, Brasilia - DF, Brazil, 2007 

6.    W. Wechsatol^, J.C. Ordonez, J.V.C. Vargas°, Effects of Nano-Particles on Skin -Friction and Heat Transfer Coefficients and Boundary Layer Thickness of Laminar Nanofluid Flow Over a Flat Plate, 19th International Congress of Mechanical Engineering, 5th to 9th of November, Brasilia - DF, Brazil, 2007 

7.    R.S. Matos, J.V.C. Vargas°, R.L.S Mainardes, J.C. Ordonez, “Overall Optimization of Fined Arrangements in Turbulent Forced Convection,” 19th International Congress of Mechanical Engineering, 5th to 9th of November, Brasilia - DF, Brazil, 2007 

8.    T. Tracy**, J.C.  Ordonez, J.V.C. Vargas°, “Development and First Law Analysis of a Tri -Generation System as a Global Senior Design Engineering Project,” 19th International Congress of Mechanical Engineering, 5th to 9th of November, Brasilia - DF, Brazil, 2007 

9.    A.M. Morega°, J.C. Ordonez and P.A. Negoias, A Local Thermal Analysis of an AC Armature Winding of High Temperature Superconducting Motor, Caius Iacob" National Conference of Fluid Mechanics and Technical Applications. Institute of Statistical Mathematics and Applied Mathematics, Romanian Academy. 19 – 21 Oct., Brasov, Romania, 2006

10.    A.P. Negoias, A.M. Morega°, and J.C. Ordonez, Heat Transfer in Spherical Photovoltaic Cells, ATEE-06, Bucharest, 24 Nov, 2006

11.    A.M. Morega°, J.C. Ordonez, P.A. Negoias, M. Morega, and R. Hovsapian** , “Optimal Electrical Design of Spherical Photovoltaic Cells,” Proceedings of the COMSOL Users Conference, Key Note Lecture, Prague, 2006

12.    A.M. Morega° and J.C. Ordonez, “Constructal Design of Concurrent Power Distribution Networks,” Proceedings of the COMSOL Users Conference, Boston, 2006

13.    P.J. Masson, P. Tixador, J.C. Ordonez, A.M. Morega°, and C.A. Luongo, “Electro- Thermal Model for HTS Motor Design”, Applied Superconductivity Conference, Seattle, Sep. 2006.

14.    J.V.C. Vargas°, J.C. Ordonez, A.M. Morega°, C.A. Luongo and C. Shih,“Bringing International Components to Capstone Senior Design Projects - Preparation for a global economy,” Proceedings of the 5th ASEE Global Colloquium On Engineering Education, 2006, 8-12 October, Rio de Janeiro. Engineering Education in the Americas and Beyond, 2006

15.    J.C. Ordonez, J.V.C. Vargas°, A.M. Morega°, C.A. Luongo and C. Shih, “An International Component to Capstone Senior Design Projects,” Proceedings of the 36th ASEE/IEEE Frontiers in Education Conference, October 28-31, San Diego, CA, 2006

16.    M. Mathur*, A.P.Negoias, J.C. Ordonez, and A.M. Morega°, “Thermal Stability of an HTS Armature Winding,” Proceedings of the Fluent Users Group Meeting, Sinaia, Romania, March 30-31, 2006

17.    R. Hovsapian** , J.C. Ordonez, J.V.C. Vargas°, P.G. McLaren, “Thermodynamic Analysis of a 5MW Dynamometer Set to Simulate Ship Propulsion and Propulsion Load of an All-electric Ship,” Proceedings of the Brazilian Congress of Thermal Engineering and Sciences - ENCIT, Curitiba, Brazil, 2006 

18.    E.L. Ferreira, J.V.C. Vargas°, M.C. Campos**, F.G. Dias**, J.C. Ordonez, M.L. Brioschi, “Development of an Air Heating and Humidifying System for Mechanical Ventilation of Intensive Care Unit Patients,” Proceedings of the Brazilian Congress of Thermal Engineering and Sciences - ENCIT, Curitiba, Brazil, 2006  

19.    J.C. Berndsen, J.V.C. Vargas°, E. Dilay, F.G. Dias**, and J.C. Ordonez, “Desenvolvimiento Experimental de um Sistema Trigenerador com Producao Simultanea de Calor, Electricidade e Frio, Proceedings of the Brazilian Congress of Thermal Engineering and Sciences - ENCIT, Curitiba, Brazil, 2006 

20.    M.V.A. Pereira, J.V.C. Vargas°, F.G. Dias**, J.C. Ordonez, J.A.R. Parise, M.C. Campos**, L.S. Martins**, H.Y.C. Fujii, R. Allage, “Exergetic Analysis of a 5 TR Experimental Absorption Refrigeration Unit Powered by Liquefied Petroleum Gas (GLP) and Exhaust Gases”, Proceedings of the Brazilian Congress of Thermal Engineering and Sciences - ENCIT, Curitiba, Brazil, 2006 

21.    S.Kosaraju**, J.C. Ordonez, and A. M. Morega°, “A Numerical Study of the Effect of Channel Geometry on the Pressure Distribution in PEMFC Bipolar Plates,” Proceedings of the Fluent Users Group Meeting, Sinaia, Romania, March 30-31, 2006

22.    A. Morega°, J.C. Ordonez, P.A. Negoias. Higher Resolution Thermal Design of an HTS AC Armature Winding. "Caius Iacob" National Conference of Fluid Mechanics and Technical Applications. Institute of Statistical Mathematics and Applied Mathematics, Romanian Academy. Bucharest, Nov. 25-26, 2005.

23.    A. Morega°, J.C. Ordonez.  Thermal Stability of an HTS AC Armature Winding. FEMLAB Conference.  Boston, MA, Oct. 23-25, 2005

24.    N.Brooks, T. Baldwin,  T. Brinson*, J.C. Ordonez and C. Luongo. Analysis of Fuel Cell Based Power Systems Using EMTDC Electrical Power Simulator, Proceedings of the IEEE Thirty-Sixth Southeastern Symposium on System Theory, March, 270-274, 2004

25.    A. Rivera, J.C. Ordonez, F.Chejne, and A. Hill.  ``Refrigeración termoacústica". (Thermoacoustic refrigeration). Memorias Mercofrio³98. ASBRAV. Porto Alegre, Brasil. Oct., 1998

26.    F.Chejne, A.Hill, E.Botero, E.Figueroa, J.C.Rojas, J.C.Pérez, C.Isaza, E.Arenas, K.Sánchez, F.Valenzuela, J.C.Ordóñez, A. Rivera, M. Carmona, J. Restrepo, J.Hinestrosa, Rational use of energy. Proceedings of Third Latin-American Congress : Electricity Generation and Transmission. Campos do Jordao, Brasil. Pp. 677-680. Nov. 9-13, 1997

27.    F.Chejne, J.C.Ordóñez, et al. ``Ahorro de energía en centrales de generación de energía eléctrica mediante el monitoreo de variables de procesos". (Energy saving in power plants by monitoring process variables). Memorias Conferencia Energetica Colombiana -Enercol 97-. Santafé de Bogotá. Ago. 27-29, 1997

28.    C.Isaza R. F.Chejne J., W.F. Flórez E., J.C. Ordóñez R. ``Optimización de sistemas centralizados de refrigeración con modelización". (Optimization of centralized refreigeration systems). IV Congreso Iberoamericano de Aire Acondicionado y Refrigeración. CIAR. Santiago de Chile. Vol I (artículos técnicos). pp. 31-35. Oct, 1997

29.    F.Chejne , J.C. Ordóñez R., W.F. Flórez E., E.A. Botero G. ``Análisis exergético y optimización de centrales térmicas". (Exergetic analysis and optimization of power plants). III Conferencia de Termoenergética Industrial, Santa Clara,Cuba. Nov, 1996



Non-refereed Publications Published

1.     J.C.Ordóñez, A.Rivera, F.Chejne, A.Hill. ``Refrigeración termoacústica". (Thermoacoustic refrigeration). Revista Acaire. Asociación Colombiana del Acondicionamiento de Aire y de la Refrigeración . Santafé de Bogotá. Edición No. 20 pp. 5-10. Mar-Jun, 1998

2.    F.Chejne, J.C.Ordóñez, et al. ``Alternativas tecnológicas para el uso eficiente de la energía en la industria". (Technological alternatives for rational use of energy in industry). Memorias Quinta Jornada de Investigación - CIDI UPB. Medellín, Oct., 1997

3.    F.Chejne, A.Rivera, J.C.Ordóñez. ``Lejos del equilibrio". (Far from equilibrium). Memorias de la Quinta Jornada de investigación UPB. Medellín, Oct., 1997

4.     J.C.Ordóñez, A.Rivera, F.Chejne. ``Introducción a la Termoacústica". (Introduction to thermoacoustics). Memorias Cuarta Jornada de Investigación - CIDI UPB. Medellín, Oct. 1996

5.    J.C.Ordóñez, A.Rivera, F.Chejne. ``Máquinas Termoacústicas". (Thermoacoustic Engines). Memorias Encuentro de Investigadores en Energía. Universidad Nacional sede Medellín. Nov. 1996

6.    F.Chejne J. , W.F. Flórez E. , J.C. Ordóñez R., E.A. Botero G. ``Análisis exergético de centrales térmicas". (Exergetic analysis of power plants). Memorias de la Cuarta Jornada de Investigación, CIDI-UPB. Medellín, Colombia, 1996

7.     F. Chejne, A. Hill, E. Botero, E. Figueroa, J.C. Rojas, J. C. Perez, C. Isaza, E. Arenas, K, Sanchez, S.Botero, F. Valenzuela, J.C.Ordóñez, A. Rivera, M. Carmona. ``Uso Racional de Energía". (Rational use of energy). Revista de Contaminación ambiental. Área de Estudios Ambientales CIDI'UPB. ISSN 0120-0674. Vol. 15. No.27. pp. 5-21, 1995

8.    F.Chejne, J.C. Ordóñez, et al. ``Uso racional de Energía". (Rational use of energy). Memorias de la Tercera Jornada de investigación-CIDI UPB. Medellín, Oct. 24-25, 1995

9.    F.Chejne, J.C. Ordóñez, A.Rivera et al. ``Uso racional de Energía Térmica". (Rational use of thermal energy). Memorias Primer curso de uso racional de energía organizado por ACIEM y EE.PP. de Medellín con la colaboración del CIDI-UPB. Medellín, Nov. 20-25, 1995

10.    F. Chejne, W.F. Flórez, J.C. Ordóñez, E.A. Botero. ``Análisis exergético de centrales térmicas". (Exergetic analysis of power plants). XII Jornadas de Energía. II Seminario Internacional sobre Planeamiento Energético. Santafé de Bogotá. Sep., 1995

11.    F.Chejne J., W.F. Flórez E., J.C. Ordóñez R., et al. ``Generación magnetohidrodinámica". (Magnetohydrodynamics power generation). Primera Jornada de Investigación. CIDI-UPB. Medellín, Oct., 1993