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Oklahoma State University

Moallem, Ehsan

Lecturer

Mechanical and Aerospace Engineering
Oklahoma State University
Engineering North 218
Stillwater, Oklahoma 74078-5016 USA
Phone: (405) 744-5900
Fax: (405) 744-7873
Email: moallem@okstate.edu

 

Areas of Interest

  • Air Conditioning (HVAC)
  • Heat Exchangers and Microchannels
  • Heat Transfer Calculation and Two-Phase Flow
  • Experimental Measurements of Flow
  • Refrigeration Cycles and Heat Pumps
  • Numerical Simulation (CFD)

Academic Background

Ph.D. Mechanical Engineering, Oklahoma State University
M.S. Mechanical Engineering, University of Tehran, Iran
B.S. Mechanical Engineering, University of Tehran, Iran

Current and Recent Projects

Teaching undergraduate courses (Thermodynamics II, etc.) to mechanical engineering students

Research Experience

HVAC Lab Supervisor, Oklahoma State University (4 years):
Designed & built test setup for air flow measurements on advanced coils
Conducted performance tests with microchannels, data analysis/reduction
Lab. programming, control, instrumentation, troubleshooting, and DAQ systems

Head of R&D Division, Saravel Corp. Tehran, Iran (6 years):
Design & modeling of heat exchangers & heat transfer calc. in evap. cond. (fin & tube, shell & tube)
Design of new chiller, AHU & cond. units with fan, coil, compressor selection & technical drawings
Tested performances of chillers, AHUs etc. in lab sections and on site, data analysis/reduction
CFD simulation of air flow circulation of equipments with experimental data validation

Select Publications

Journal Papers:

Moallem E., Padhmanabhan S., Cremaschi L., Fisher D.E. (2012) Experimental investigation of the surface temperature and water retention effects on the frosting performance of a compact microchannel heat exchanger for heat pump systems. International Journal of Refrigeration, 35:171-186.
 
Moallem E., Cremaschi L., Fisher D., Padhmanabhan S. (2012) Experimental measurements of the surface coating and water retention effects on frosting performance of microchannel heat exchangers for heat pump systems. Experimental Thermal and Fluid Science, 39:176-188.
 
Padhmanabhan S.K., Fisher D.E., Cremaschi L., Moallem E. (2011) Modeling non-uniform frost growth on a fin-and-tube heat exchanger. International Journal of Refrigeration, 34:2018-2030.
 
Moallem E., Hong T., Cremaschi L., Fisher D.E. (2012) Experimental Investigation of Adverse Effect of Frost Formation on Microchannel Evaporators, Part 1: Effect of Fin Geometry and Environmental Effects. International Journal of Refrigeration (Accepted for Publication).
 
Moallem E., Hong T., Cremaschi L., Fisher D.E. (2012b) Experimental Investigation of Adverse Effect of Frost Formation on Microchannel Evaporators, Part 2: Effect of Surface Coating and Water Retention. HVAC & R Journal (Under Review).

International Conference Papers:

Moallem E., Padhmanabhan S., Cremaschi L., Fisher D.E. (2010) Experimental Study of Onset and Growth of Frost on Outdoor Coils of Air-Source Heat Pump Systems. Proceedings of ASME-ATI-UIT, Conference on Thermal and Environmental Issues in Energy Systems May 16-19, Sorrento, Italy.
 
Moallem E., Cremaschi L., Fisher D.E. (2010) Experimental Investigation of Frost Growth on Microchannel Heat Exchangers. International Refrigeration and Air Conditioning Conference at Purdue University, West Lafayette, IN, USA, July 12-15, 2010.
 
Moallem E., Padhmanabhan S., Cremaschi L., Fisher D.E. (2011) Effect of surface coating on frosting performance of microchannel heat exchangers for heat pump systems, Proceedings of International Conference on Air-Conditioning & Refrigeration, July 6-8, 2011, Yongpyong Resort, Gangwon-Do, KOREA
 
Moallem E., Hong T., Cremaschi L., Fisher D. (2012) Developing Empirical Correlations for Frost Thickness and Air Face Velocity Degradation for Microchannel Heat Exchangers Used in Heat Pump Applications under Frosting Condition International Refrigeration and Air Conditioning Conference at Purdue University West Lafayette, IN, USA, July 16-19, 2012.
 
Hong T., Moallem E., Cremaschi L., Fisher D. (2012) Measurements of Frost Growth on Louvered Folded Fins of Microchannel Heat Exchangers, Part 1: Experimental Methodology. ASHRAE Transactions 118: part 2, Chicago, IL.
 
Cremaschi L., Moallem E., Fisher D., Hong T., Padhmanabhan S. (2012) Frosting Performance of Fin-and-Tube Evaporators with Small Copper Tubes Diameter . International Refrigeration and Air Conditioning Conference at Purdue University, West Lafayette, IN, USA, July 16-19, 2012.
 
Shokouhmand, H., and E. Moallem. (2005). ”Blowing supply air directly into an ice storage for cold air distribution”. Proceedings of 2nd International Exergy, Energy, and Environment Symposium (IEEES 2). Kos, Greece. no. 171.