CURRICULUM VITAE

 

Last name: Alexis

First name: George

Middle name: Konstandinos

Birth date: 10/9/1954

Tel.: +30 210 5381257

E-mail: galexis@gdias.teipir.gr

Married with two children.

 

Education

  • PhD of National Technical University of Athens, Department of Mechanical Engineering, Thermal Section (2002).

PhD Thesis: “Thermodynamics of ejectors and their efficiency in refrigeration units”.

  • MSc of National Technical University of Athens, Department of Marine Engineering and Naval Architecture (1982).
  • Technological Education Institute of Athens, Faculty of Technological Applications, Department of Marine Engineering (1977).

 

Career history

  • Associate Professor at Technological Education Institute of Piraeus, Faculty of Technological Applications, Department of Mechanical Engineering, Energy Section (2009 up today).
  • Assistant Professor at Technological Education Institute of Piraeus, Faculty of Technological Applications, Department of Mechanical Engineering, Energy Section (2003 up 2009)
  • Lecturer at Technological Education Institute of Piraeus, Faculty of Technological Applications, Department of Mechanical Engineering, Energy Section (1985 - 2003).
  • Maintenance Engineer at Hellenic Company of Chemical Products and Fertilizers (1986 – 1992).
  • Sales Engineer at Drakos – Polemis Co, Manufacturer of Pumping Systems (1992 - 1993).

 

Professional certifications

Member of Technical Chamber of Greece.

 

Creative works

Academic Research Project Manager of research work, supported by European Union and the Ministry of National Education of Greece with title: “Transformation of vapour compression cooling system in combined vapour compression cooling system or ejector cooling system supplied with solar energy (study – manufacture). 

 

Publications

1. D.A.Kouremenos, E,D.Rogdakis, G.K.Alexis, “A high temperature heat pump with methanol/water absorption” Proc. of the ASME 1996, AES - Vol.36, pp.375-380.

2. D.A.Kouremenos, E,D.Rogdakis, G.K.Alexis, “Enthalpy - Mole fraction diagram for the binary system ammonia/water at modest and higher pressures”, Proc. of TAIES’97, Beijing, China.                                           

3. D.A.Kouremenos, E,D.Rogdakis, G.K.Alexis, “Optimization of enhanced steam - ejector applied to steam jet refrigeration”, Proc. of  the ASME 1998, AES - Vol.38, pp.19-26.                                      

4. D.A.Kouremenos, E,D.Rogdakis, G.K.Alexis,  “Performance characteristics of a combined ejector- absorption heat pump using NH3 - H2O”, Proc. of  the ASME 1999, AES - Vol.39, pp.679-687.

5.  E,D.Rogdakis and G.K.Alexis, “Design & parametric investigation of ejector in an air-conditioning system”, Applied Thermal Engineering, 2000, Vol.20, pp.213-226.

6. G.K.Alexis and E,D.Rogdakis, “Temperature- Enthalpy / Entropy charts of combined ejector- absorption cycle using NH3 - H2O”, International Journal of Energy Research, 2000, Vol.24, pp.475-484.

7.    E,D.Rogdakis and G.K.Alexis, “An investigation of ejector design at optimum operating condition”, Energy Conversion & Management, 2000, Vol.41, pp.1841-1849.

8.    G. A. Alexis and E. D. Rogdakis, “Performance of solar driven Methanol - Water combined Ejector - Absorption cycle in the Athens area”, Renewable Energy, 2002, Vol. 25 pp.249-266.

9.    G. A. Alexis and E. D. Rogdakis, “Performance characteristics of two combined Ejector - Absorption cycles”, Applied Thermal Engineering, 2002, Vol. 22, pp.97-106.

10. G. A. Alexis and E. D. Rogdakis, “A verification study of steam-ejector refrigeration model”, Applied Thermal Engineering, 2003, Vol. 23, pp.29-36.

11. G. K. Alexis and J. S. Katsanis, “Performance characteristics of a methanol ejector refrigeration unit”, Energy Conversion & Management, 2004, Vol.45, pp.2729-2744.

12. G. A. Alexis, “Estimation of ejector’s main cross sections in steam-ejector refrigeration system”, Applied Thermal Engineering, 2004, Vol. 24, pp.2657-2663.

13. G. K. Alexis, “Exergy analysis of ejector-refrigeration cycle using water as working fluid”, International Journal of Energy Research, 2005, Vol.29, pp.95-105.

14. G. K. Alexis and E. K. Karayiannis, “A solar ejector cooling system using refrigerant R134a in Athens area”, Renewable Energy, 2005, Vol. 30 pp.1457-1469.

 

Citations

Journals

1.  E.D. Rogdakis and G.K. Alexis, “Design & parametric investigation of ejector in an air-conditioning system”, Applied Thermal Engineering, 2000, Vol.20, pp.213-226.

                                             

  á. Dseevaux P. and Aeschbacher O., “Numerical and experimental flow visualizations of the mixing process inside an induced air ejector”, International Journal of Turbo and Jet Engines, 2002, Vol.19(1-2), pp.71-78.

  â. Ouzzane M. and Aidoun Z., “Model development and numerical procedure for detailed ejector analysis and design”, Applied Thermal Engineering, 2003, Vol.23(18), pp.2337-2351.

  ã. Chunnanond K. and Aphornratana S., “Ejectors: applications in refrigeration technology”, Renewable & Sustainable Energy Reviews, 2004, Vol.8(2), pp. 129-155.

  ä.  Vlachos G. and Kaldellis J., “Application of gas-turbine exhaust gases for brackish water desalination: a techno-economic evaluation”, Applied Thermal Engineering, 2004, Vol.24(17-18), pp.2487-2500.

  å. Aidoun Z. and Ouzzane M., “The effect of operating conditions on the performance of a supersonic ejector for refrigeration”, International Journal of Refrigeration, 2004, Vol.27(8), pp.974-984.

  óô. Riffat S.B., Jiang L., Gan G., “Recent development in ejector technology – A review”, International Journal of Ambient Energy”, 2005, Vol.26(1), pp.13-26.

  æ. Hernandez S.C., Chaudhuri D., Chen W., Myung N.V., Mulchandani A., Single polypyrrole nanowire ammonia gas sensor”, Electroanalysis, 2007, Vol.19(19-20), pp.2125-2130.

 

2.   E.D. Rogdakis and G.K. Alexis, “Investigation of ejector design at optimum operating condition”, Energy Conversion & Management, 2000, Vol.41, pp.1841-1849.

 

  á. Jiang L., Gu Z., Feng X., Li Y., “Thermo-economical analysis between new absorption-ejector hybrid refrigeration system and small double-effect absorption system”, Applied Thermal Engineering, 2002, Vol.22(9), pp.1027-1036.

  â. Chunnanond K. and Aphornratana S., “Ejectors: applications in refrigeration technology”, Renewable & Sustainable Energy Reviews, 2004, Vol.8(2), pp. 129-155.

  ã. Yu J., Chen H., Ren Y., Li Y., “A new ejector refrigeration system with an additional jet pump”, Applied Thermal Engineering, 2006, Vol.26(2-3), pp.312-319.

  ä. Yu J., Ren Y., Chen H., Li Y., “Applying mechanical subcooling to ejector refrigeration cycle for improving the coefficient of performance”, Energy Conversion & Management, 2007, Vol.48(4), pp.1193-1199.

  å.  Kim M., Shn Y, Cho C., Lee W., Kim C., “Customized design for the ejector to recirculate a humidified hydrogen fuel in a submarine PEMFC”, Journal of Power Sources, 2008, Vol.176(2), pp.529-533.

  óô. Angelino G., Invernizzi C., Thermodynamic optimization of ejector actuated refrigerating cycles”, International Journal of Refrigeration, 2008, Vol.31(3), pp.453-463.

 

3.    G.A. Alexis and E.D. Rogdakis, “Performance of solar driven Methanol - Water combined Ejector - Absorption cycle in the Athens area”, Renewable Energy, 2002, Vol.25, pp.249-266.

 

á. Chunnanond K. and Aphornratana S., “Ejectors: applications in refrigeration technology”, Renewable & Sustainable Energy Reviews, 2004, Vol.8(2), pp. 129-155.

â. Sozen A., Ozalp M., Arcaklioglou E., “Prospects for utilization of solar driven ejector-absorption cooling system in Turkey”, Applied Thermal Engineering, 2004, Vol.24(7), pp.1019-1035.

ã. Sozen M. and Ozalp M., “Solar-driven ejector-absorption cooling system”, Applied Energy, 2005, Vol.80(1), pp.97-113.

ä. Wu S., Lin G., Chen J., “Optimum thermo-economic and thermodynamic performance characteristics of an irreversible three-heat-source heat pump”, Renewable Energy, 2005, Vol.30(15), pp.2257-2271.

 

4.    G.A. Alexis and E.D. Rogdakis, “Performance characteristics of two combined Ejector - Absorption cycles”, Applied Thermal Engineering, 2002, Vol. 22, pp.97-106.

 

á. Chunnanond K. and Aphornratana S., “Ejectors: applications in refrigeration technology”, Renewable & Sustainable Energy Reviews, 2004, Vol.8(2), pp. 129-155.

 

5.    G.A. Alexis and E.D. Rogdakis, “A verification study of steam-ejector refrigeration model”, Applied Thermal Engineering, 2003, Vol.23, pp.29-36.

 

á.  Yu J., Chen H., Ren Y., Li Y., “A new ejector refrigeration  system with an additional jet pump”, Applied Thermal Engineering, 2006, Vol.26(2-3), pp.312-319.

â.  Deng J., Jiang P., Lu T., Lu W., “Particular characteristics of transcritical CO2 refrigeration cycle with an ejector”, Applied Thermal Engineering, 2007, Vol.27(2-3), pp.381-388.

 

6.   G.K. Alexis and J.S. Katsanis, “Performance characteristics of a methanol ejector refrigeration unit”, Energy Conversion & Management, 2004, Vol.45, pp.2729-2744.

 

  á.  Zhu Y., Cai W.,Wen C., Li Y., “Shock circle model for  ejector performance evaluation”, Energy Conversion & Management, 2007, Vol.48(9), pp.2533-2541.

 â. Angelino G., Invernizzi C., Thermodynamic optimization of ejector actuated refrigerating cycles”, International Journal of Refrigeration, 2008, Vol.31(3), pp.453-463.

  ã. Zhu Y., Cai W., Wen C., Li Y., “Simplified ejector model for control and optimization”, Energy Conversion and Management, 2008, Vol. 49(6), pp.1424-1432.

 

7.   G.K. Alexis, “Exergy analysis of ejector-refrigeration cycle using water as working fluid”, International Journal of Energy Research, 2005, Vol.29, pp.95-105.

 

  á. Hepbasli A., “Thermoeconomic analysis of household refrigerators”, International Journal of Energy research, 2006, Vol.31(10), pp.947-959.

 

8.   G. K. Alexis and E. K. Karayiannis, “A solar ejector  cooling system using refrigerant R134a in Athens area”, Renewable Energy, 2005, Vol.30, pp.1457-1469.

 

  á. Kasperski J. and Pietrowich S., “Modelling of energetic optimal working point of an ejector air conditioner combined with a flat solar collector”, Archives of Thermodynamics, 2006, Vol.27(4), pp.111-122.

â. Ersoy H.K., Yalcin S., Yapici R., Ozgoren M., “Performance of a solar ejector cooling-system in the southern region of Turkey”, Applied Energy, 2007, Vol.84(9), pp.971-983.

ã. Kim D.S., Infante Ferreira C.A., “Solar refrigeration options - a state - of - the - art review”, International Journal of Refrigeration, 2008, Vol.31(1), pp.3-15.

 

Conferences

1.            E.D. Rogdakis and G.K. Alexis, “Design & parametric investigation of ejector in an air-conditioning system”, Applied Thermal Engineering, 2000, Vol.20, pp.213-226.

 

á. El-Dessouky H., Ettouney H., Alatiqi I., Al-Nuwaibit G.,  Evaluation of steam jet ejectors”, Chemical  Engineering and Processing, 2002, Vol.41(6), pp.551-561.

â. Zhang B., Shen S.-Q., Li H.-J., “Study of a two-dimensional flow model on design and analysis of ejector key structure”, Dalian Ligong Daxue Xuebao/Journal of Dalian University of Technology, 2004, Vol.44(3), pp. 388-391.

ã. Li H. and Shen S., “Analysis of flow field in an ejector with steam as working fluid”, American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, 2004, Vol.491(2), pp.227-234.

ä.  Al-Ansary H.A., “The use of ejector refrigeration systems for turbine inlet air cooling: A thermodynamic and CFD study”, Proceedings of the Energy Sustainability Conference 2007, pp. 231-238.

 

2. G.K. Alexis and E.D. Rogdakis, “Temperature- Enthalpy / Entropy charts of combined ejector- absorption cycle using NH3 - H2O”, International Journal of Energy Research, 2000, Vol.24, pp.475-484.

 

  á. Liu M. and Zhang N., “Energy recovery proposals in an ammonia/water system for power/refrigeration cogeneration”, ASME, Advanced Energy Systems Division, 2006, 10p.

 

3.            E.D. Rogdakis and G.K. Alexis, “Investigation of ejector design at optimum operating condition”, Energy Conversion & Management, 2000, Vol.41, pp.1841-1849.

 

  á.  Angelino G. and Invernizzi C., “Ejector-assisted liquid metal topping cycles”, Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2004, Vol.218(2), pp.111-121.

  â. Amano Y., Takeshita K., Hashizume T., “Performance improvement of an ammonia-water mixture turbine cycle with ejector”, Proceedings of the ASME Power Conference, 2005, PART B, Article number PWR2005-50362, 2005, pp.1291-1297.

  ã. Chen H., Yu J., Ren Y., Li Y., “Theoretical analysis on new ejector refrigeration cycle”, Hsi-An Chiao Tung Ta Hsueh/Journal of Xi’an Jiaotong University, 2005, Vol.39(11), pp.1215-1218+1240.

  ä.  Xu H.-T., Sang Z.-F., Gu B., Chai N., Xu W.-D., “Numerical simulation of the performance of steam-jet vacuum pump“, Gao Xiao Hua Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities, 2005, Vol.19(1), pp.22-29.

  å.  Park B.H., Lim J.H., Yoon W., Lee J.H., Lee Y., “Parametric investigation of controlling factors for deceleration and evacuation qualities by supersonic diffuser”, Collection of Technical Papers – AIAA/ASME/SAE/ASEE 42nd Joint Propulsion Conference, 2006, Vol.2, pp.957-976.

  óô. Ren Y., Yu J., Li Y., “Theoretical study on a new mechanical subcooling ejector refrigeration system”, Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology, 2008, Vol.40(1), pp.164-168.

 

4.            G.A. Alexis and E.D. Rogdakis, “Performance of solar driven Methanol - Water combined Ejector - Absorption cycle in the Athens area”, Renewable Energy, 2002, Vol.25, pp.249-266.

 

  á.  Sozen A. and Yucesu H.S., “Feasibility of usage possibility in turkey of solar driven ejector-absorption cooling system”, International Solar Energy Conference, 2004, pp.305-311.

 

5.            G.A. Alexis and E.D. Rogdakis, “Performance characteristics of two combined Ejector - Absorption cycles”, Applied Thermal Engineering, 2002, Vol. 22, pp.97-106.

 

  á. Gao H., Fu Y., Fu Y., Da G., Fei Y., “Experimental study of plate-type absorber using lithium bromide and water as the working fluids”, Taiyangneng Xuebao/Acta Energiae Solaris Sinica, 2005, Vol.26(2), pp.266-270.

 

6.            G.A. Alexis and E.D. Rogdakis, “A verification study of steam-ejector refrigeration model”, Applied Thermal Engineering, 2003, Vol.23, pp.29-36.

 

  á. Deng J., Jiang P., Wang G., Lu T., Wang G., Lu W., “Theoretical analysis of a transcritical CO2 vapor compression/ejection refrigeration cycle”, Qinghua Daxue Xuebao/Journal of Tsinghua University, 2006, Vol.46(5), pp.670-673.

  â. Zhang Y., Zhao W., Tian Q. Sun Y., “Investigation on performance of ejector and optimal refrigerants for solar ejector refrigeration system”, Taiyangneng Xuebao/Acta Energiae Solaris Sinica, 2007, Vol.28(2), pp.130-136.

 

7.            D.A. Kouremenos, E.D. Rogdakis, G.K. Alexis,       “Optimization of enhanced steam - ejector applied to steam jet refrigeration”, Proc. of the ASME 1998, AES - Vol.38, pp.19-26.

 

  á. Wang H., Drost K., Peterson R., “Thermodynamic performance of a miniature expander/ compressor heat-actuated heat pump”, Collection of Technical Papers - 2nd International Energy Conversion Engineering Conference, 2004, Vol.3, pp.1455-1461.

         

Military record

Flight Sergeant, Department of Quality Control of Airplanes and Gas-turbines (1982 -1984).