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Hwang, Yunho

Dr. Yunho Hwang
Research Professor
Associate Director - Center for Center for Environmental Energy Engineering
Center for Environmental Energy Engineering
4164 Glenn. L. Martin Hall Building
College Park, MD 20742

Research Interests 

  • Alternative Cooling Technologies and Applications
  • Cycle Components Design, Development, and Testing
  • Heat Transfer and Modeling
  • Sensor Development and Testing
  • Refrigerant/Oil Flow Visualization Movie


Yunho Hwang is director of the Alternative Cooling Technologies and Application Consortium in CEEE. Dr. Hwang works extensively in refrigerant alternatives research, particularly involving carbon dioxide. His focus is on enhancing understanding of the transcritical carbon dioxide cycle through cycle simulation, model development and experimental studies. His career spans more than twenty years, including ten years of industrial experience at Samsung Electronics as a senior researcher in the area of air conditioning and refrigeration. Dr. Hwang is the author of two books, Vapor Compression Heat Pumps with Refrigerant Mixtures, with Reinhard Radermacher, 2005, and Technical Heat Transfer, 1988, and was a contributor to Automotive Air-Conditioning, 2nd Edition, with the chapter “Alternative Refrigeration Cycle”, 2002. He has also published nearly 100 articles and papers in the field. He is a member of ASHRAE, SAE, ASME, and IIR.


  • Ph.D. ('97), M.S. ('95) - Mechanical Engineering
    University of Maryland (College Park, USA)
  • B.S. ('83) - Mechanical Engineering 
    Korea University (Seoul, South Korea)

Related News 

Prof. Yunho Hwang Recognized as ASHRAE Fellow
He will receive the award at the Society's upcoming Winter Conference in Atlanta, Georgia. July 18, 2018

Mechanical Engineering at ASME IMECE Conference
Professor Radermacher was a plenary speaker and ME alumnus Ryan Kennett won Best Student Paper at this year’s conference. November 17, 2017

Researchers Introduce RoCo, a Mobile Personal Heating and Cooling Device
UMD Invention Has Potential to Cut Energy Costs in Residential and Large Building AC March 24, 2017

The University of Maryland Receives $50,000 Grant from Dominion Foundation
Award supports new research on high efficiency solar-powered cooling systems. September 25, 2015

UMD Startup To Solve Energy Conversion Challenges in Thermal Systems
Optimized Thermal Systems provides engineering consulting for HVAC&R systems. August 25, 2015

Desai Named ASME Fellow
Mechanical Engineering Professor Jaydev Desai named ASME Fellow. May 28, 2015

Dasgupta, Fourney and Hwang Named ASME Fellows
Three Mechanical Engineering faculty named American Society of Mechanical Engineers Fellows February 6, 2015

Hwang Invited to Energy Editorial Board, Chairs ASME 2015 Conference and Delivers Keynote
Professor Yunho Hwang invited to Energy editorial board, chairs ASME 2015 conference and delivers keynote at International Symposium on Refrigeration Technology. November 7, 2014

Radermacher and Hwang Awarded New Patent
Mechanical Engineering professors awarded patent for advancements in air conditioning technology. January 14, 2014

UMD Team Wins First Place in MaxTech Competition
Team UMD Dryer wins the first place gold medal for their energy saving heat pump dryer. September 3, 2013

Yunho Hwang to Receive Exceptional Service Award from ASHRAE
Associate research professor awarded for his active involvement in the organization. March 15, 2013

UMD Researchers Win $1.5 Million Department of Energy Award to Improve Home Cooling Efficiency
The Center for Environmental Energy Engineering to collaborate with the Oak Ridge National Laboratory. January 17, 2013

Mechanical Engineering Wins First Place in Max Tech and Beyond Design Competition
Yunho Hwang led a student team that designs winning energy efficient cooling system. August 20, 2012

CEEE to Host CO2 Transcritical Cycle: Fundamentals and Current Status Webinar
Dr. Hwang, Associate Director and Professor with (CEEE), to host new webinar on  May 11, 2012. April 12, 2012

Yungho Hwang Named Chairperson of IIR Working Party
CEEE Associate Director heads investigation on the climate performance of refrigeration systems for the International Institute of Refrigeration. February 20, 2012

Collaborative international projects funded in solar power, cell-based systems, and ultra-low power systems
Research is part of agreement between Autonomous Province of Trento, Italy, and University of Maryland. February 16, 2012

Eisele, Hwang, and Radermacher Win Best Technical Paper Award
SAE/IMechE Vehicle Thermal Managment Systems Conference Awards Best Technical Paper November 28, 2011

Abdullah A. Al-Abdulkarem Receives Honorable Mention for Poster
ME Student acknowledged by ASME for poster on enhanced oil recovery. November 22, 2011

Eisele, Hwang, and Radermacher Win Best Technical Paper Award
CEEE professors and ME grad student have strong showing at VTMS 10 Conference. August 24, 2011

Hwang Honored with ASHRAE's Distinguished Service Award
Dr. Yunho Hwang, CEEE Associate Director, to be recognized for his service contributions. March 9, 2010

PI Holds 1st Annual Research Workshop
ME delegation travels to Abu Dhabi to promote research collaborations. February 17, 2010

Hwang Appointed Associate Director of CEEE
Dr. Hwang will oversee day-to-day operations of the world renowned research facility. February 3, 2009