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Omar Abdelaziz Ahmed Abdelaziz

  • Position: Assistant professor
  • Department: Department of Mechanical Engineering
Brief Biography

Abdelaziz Ahmed is an assistant professor of thermofluids with more than 15 years of Research and Development (R&D) and project management experience in energy-efficient building technologies, sustainable energy production and utilization, alternative cooling and heating technologies, and alternative lower global warming refrigerants. He started his professional career at Oak Ridge National Laboratory in 2009 after obtaining his PhD in mechanical engineering from the University of Maryland, College Park. Ahmed also joined the US Department of Energy Building Technologies Office as a senior fellow (2012-2014). He further developed the office’s technology prioritization tool and developed new programs for building-integrated solar technologies and carbon fiber. Upon his return to ORNL in 2014, Abdelaziz led the building equipment research group and was responsible for a diverse research program with an annual budget of $18M. In September 2017, he moved to Dubai, UAE, and established CLEAT-Consulting, where he catered to global consulting and R&D services for green buildings. Ahmed actively collaborates with leading appliance and equipment manufacturers on developing advanced and state-of-the-art Heating, Ventilation, Air conditioning and refrigeration (HVAC&R) equipment. Abdelaziz is currently a member of the United Nations Ozone Secretariat Techno-economic Assessment Panel (TEAP) and a co-chair of its Refrigeration, Air Conditioning, and Heat Pump Technical Options Committee (RTOC). He is an active member of the American Society of Heating Refrigeration and Air Conditioning Engineering (ASHRAE). He serves on its research administration committee as a research activity subcommittee chair. He also serves on several other technical committees and multi-disciplinary task groups. Ahmed is an internationally recognized expert. He received several awards, including the ASHRAE 2018 Best Technical Paper Award, the Technical Leadership Award at the Montreal Protocol 30th anniversary, the 12th IEA Heat Pump Conference Ritter Von Rittinger Award, the 2016 ASHRAE Distinguished Service Award, and the 2005 AIAA Best Paper Award in Terrestrial Energy. Finally, Abdelaziz has published over 100 peer-reviewed papers and holds several patents.

Research Interest
  • Energy efficiency
  • Renewable energy
  • Sustainability
  • Alternative refrigerants
  1. Hassan, Muhammed A., and Omar Abdelaziz. Best Practices and Recent Advances in Hydronic Radiant Cooling Systems–Part II: Simulation, Control, and Integration. Energy and Buildings (2020), in press
  2. Yang, Zhiyao, Ming Qu, Omar Abdelaziz, and Kyle R. Gluesenkamp. Development and case study of the liquid desiccant system module in sorption system simulation program (SorpSim), Applied Thermal Engineering volume 162, 2019, pages 114261.
  3. Abu-Heiba, A., Patel, V., Baxter, V., Abdelaziz, O., Elatar, A., Setting Charge Limits for Flammable Refrigerants, ASHRAE Journal, Volume 60, Issue 7. 2020 George Briley ASHRAE Journal Article Award
  4. Mallow, A., Abdelaziz, O., Graham, S., Thermal charging performance of enhanced phase change material composites for thermal battery design, International Journal of Thermal Sciences, Volume 127, 2018, Pages 19-28, ISSN 1290-0729
  5. Qu, M., Abdelaziz, O., Zhiming, G., Yin, H., Isothermal membrane-based air dehumidification: A comprehensive review, Renewable and Sustainable Energy Reviews, Volume 82, Part 3, 2018, Pages 4060-4069, ISSN 1364-0321
  6. Nawaz, K., Shen, B., Elatar, A., Baxter, V., Abdelaziz, O., R290 (propane) and R600a (isobutane) as natural refrigerants for residential heat pump water heaters, Applied Thermal Engineering, Volume 127, 25 December 2017, Pages 870-883
  7. Shen, B., Abdelaziz, O., Shrestha, S., Elatar. A., Model-based optimizations of packaged rooftop air conditioners using low global warming potential refrigerants, International Journal of Refrigeration, Volume 87, March 2018, Pages 106-117
  8. Zhang, M., Abdelaziz, O., Momen A.M., and Abu-Heiba, A., A numerical analysis of a magnetocaloric refrigerator with a 16-layer regenerator, Scientific Reports, Volume 7, Article number: 13962, 2017
  9. Gluesenkamp, K.R.; Chugh, D.; Abdelaziz, O.; Moghaddam, S.; Efficiency analysis of semi-open sorption heat pump systems, Renewable Energy, Volume 110, September 2017, Pages 95-104
  10. Qu, M., Abdelaziz, O., Sun, X.G., Yin, H., Aqueous solution of [EMIM][OAc]: Property formulations for use in air conditioning equipment design, Applied Thermal Engineering, Volume 124, September 2017, Pages 271-278, ISSN 1359-4311
  11. Beshr, M., Aute, V., Abdelaziz, O., Fricke, B., Radermacher, R., Potential emission savings from refrigeration and air conditioning systems by using low GWP refrigerants, The International Journal of Life Cycle Assessment, Volume 22, Issue 5, May 2017, Pages 675-682, doi:10.1007/s11367-016-1186-6.
  12. Mallow, A., Abdelaziz, O., Graham, S., Thermal charging study of compressed expanded natural graphite/phase change material composites, Carbon, Volume 109, November 2016, Pages 495-504
  13. Odukomaiya, A., Abu-Heiba, A., Gluesenkamp, K. R., Abdelaziz, O., Jackson, R. K., Daniel, C., Graham, S., Momen, A. M., Thermal analysis of near-isothermal compressed gas energy storage system, Applied Energy, Volume179, October 2016, Pages 948-960
  14. Qu, M., Abdelaziz, O., Yin, H., New configurations of a heat recovery absorption heat pump integrated with a natural gas boiler for boiler efficiency improvement, Energy Conversion and Management, Volume 87, Pages 175-184, June 2014.
  15. Saleh, K., Abdelaziz, O., Aute, V., Radermacher, R., Shapour, A., Approximation assisted optimization of headers for new generation of air-cooled heat exchangers, Applied Thermal Engineering Volume 61, Number 2, Pages 817-824, 2013.
  16. Shen, B., Abdelaziz, O., Rice, C. K., Auto-Calibration and Control Strategy Determination for a Variable-Speed Heat Pump Water Heater Using Optimization HVAC&R Research, Volume 18, Number 5, October 2012, Pages 904-914, 2012.
  17. Bansal, P., Abdelaziz, O., Vineyard, E. A., Status of Not-in-Kind Refrigeration Technologies for Household Space Conditioning, Water Heating and Food Refrigeration, International Journal of Sustainable Built Environment, Volume 1, Number 1, June 2012, Pages 85-101, 2012.
  18. Bansal, P. K., Vineyard, E. A., Abdelaziz, O., Advances in household appliances- A review, Applied Thermal Engineering, Volume 31, Issues 17-18, December 2011, Pages 3748-3760, 2011.
  19. Wang, K., Abdelaziz, O., Kisari, P., Vineyard, E. A., State-of-the-art review on crystallization control technologies for water/LiBr absorption heat pumps, International Journal of Refrigeration, Volume 34, Issue 6, September 2011, Pages 1325-1337, 2011.
  20. Abdelaziz, O., Aute, V., Azarm, S., Radermacher, R., Approximation Assisted Optimization for Novel Compact Heat Exchanger Designs, HVAC&R Research, Volume 16, Number 5, September 2010, Pages 707-728, 2010.
  21. Abdelaziz, O., Radermacher, R., Modeling Heat Exchangers Under Consideration of Manufacturing Tolerances and Uncertain Flow Distribution International Journal of Refrigeration, Volume 33, Issue 4, June 2010, Pages 815-828.
  22. Abdelaziz, O., Aute, V., and Radermacher, R., 2008, Effect of Void Fraction Model on the Dynamic Performance of Moving Boundary Heat Exchanger, Proc. 12th International Refrigeration and Air Conditioning Conference at Purdue, Purdue University, West Lafayette, IN, July 12-17, 2008, R2198, pp.1-8.
  23. Abdelaziz, O., Winkler, J., Aute, V., and Radermacher, R., 2006, Transient Simulation of a Transcritical Carbon Dioxide Refrigeration System, Proc. 11th International Refrigeration and Air Conditioning Conference at Purdue, Purdue University, West Lafayette, IN, July 15-20, 2006, R093, pp.1-8.
  24. Abdelaziz, O, Khalil, E.E., and Ramadan, M., 2006, Fluid flow regimes and thermal patterns in air conditioned transformers room, Proc. 4th International Energy Conversion Engineering Conference, AIAA, Vol. 1, San Diego, CA, Jun 26-29, 2006, AIAA-2006-4093, pp.702-710.
  25. Abdelaziz, O., El-Hariry, G., and Khalil, E.E., 2006, Relative Humidity Control inside Archaeological Facilities Using Fresh Air in Hot and Dry Areas, Proc. Healthy Buildings 2006 conference, June 4 – 8, 2006, International Society of Indoor Air Quality and Climate, Lisbon, Portugal, VEN4.6, pp.1-5.
  26. Abdelaziz, O. and Khalil, E.E., 2006, LES versus k-ε turbulence modelling of large underground archaeological facilities, Proc. 44th AIAA Aerospace Sciences Meeting, January 9-12, 2006, AIAA, Reno, NV, Vol. 18, pp.13371-13380.
  27. Abdelaziz, O. and Khalil, E.E., 2005, Understanding Air Flow Patterns and Thermal Behaviour in king Tutankhamen tomb, Proc. 2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005, November 5-11, 2005, IMECE2005-80465, ASME, Orlando, FL, pp.115-121.
  28. Abdelaziz, O. and Khalil, E.E., 2005, Modeling of Indoor Air Quality and Comfort in the Tombs of Valley of Kings, 2005 ASME Summer Heat Transfer Conference, Paper HT2005-72005, July 17-22, 2005, ASME, San Francisco, CA, pp. 513-519.
  29. Abdelaziz, O. and Khalil, E.E., 2005, Air Flow Regimes and Thermal Patterns in Climatized Tombs in Valley of Kings, 43rd AIAA Aerospace Sciences Meeting and Exhibit - Meeting Papers, 43rd AIAA Aerospace Sciences Meeting and Exhibit - Meeting Papers, January 10-13, 2005, pp.1209-1216 – BEST TERRESTRIAL ENERGY SYSTEMS PAPER AWARD.
  • PhD in mechanical engineering, 2009, University of Maryland College Park
  • MSc in mechanical power engineering, 2005, Cairo University
  • BSc in mechanical power engineering, 2003, Cairo University