Co-director - Center for Environmental Energy Engineering
Center for Environmental Energy Engineering
Maryland Applied Graduate Engineering
Maryland Energy Innovation Institute
- Ph.D. ('97), M.S. ('95) - Mechanical Engineering
University of Maryland (College Park, USA)
- B.S. ('83) - Mechanical Engineering
Korea University (Seoul, South Korea)
Dr. Yunho Hwang is a research professor and co-director of the Center for Environmental Energy Engineering (CEEE). He is a worldly-renowned expert for “Energy Efficiency and New Innovative Energy Systems Research” in the field of refrigeration and air-conditioning (RAC). He started his industrial career at Samsung Electronics in 1983, developed energy-efficient heat pump systems, and replaced ozone-depleting R12 with R134a in household refrigerators. Since joining the University of Maryland in 1993, he developed R-22 alternative refrigerants for air-conditioning systems and then started researching enhanced CO2 systems. In 1997, he started the Energy Efficiency and Heat Pumps Consortium as a director and successfully developed multiple innovative energy-efficient and sustainable RAC technologies. In addition to developing energy-efficient technologies such as two-stage CO2 split cycle, saturation cycle, and hybrid separate sensible and latent cooling technology, he has initiated new innovative research on “Not-in-kind” Refrigeration Systems beyond sorption technologies such as elastocaloric cooling systems and electrochemical compression for natural refrigerants. As an educator and researcher, he advised UMD student teams for multiple national and international collegiate design competitions, introduced innovative thermal systems concepts, and helped teams win First or Second place.
He is an ASME Fellow, an ASHRAE Fellow, and a member of ASME, ASHRAE, SAE, and IIR. He served as a President of Commission B1, a chair of the LCCP Working Group for the IIR, and an operating agent of ANNEX 54 for IEA HPT. He also serves Energy, Elsevier (Netherlands) as a subject Editor since 2015, and Int. Journal of AC&R, World Scientific (US), as an editor since 2013.
Gustav Lorenzen Medal Award from IIR, August 2023
The Wilbur T. Pentzer Award from USNC/IIR, July 2022.
A. James Clark Student Competition Advisors Award, December 2021.
Peter Ritter von Rittinger International Heat Pump Award, IEA HPT, April 2021.
The University of Maryland, Dean’s Award for Professional Track Faculty Research, September 2020
ASHRAE Fellow, 2019
ASME Fellow, 2014
Working Fluids, Heat Transfer, Compact Heat Exchangers, Vapor Compression, Sorption Cycles and Caloric Cooling, Electrochemical Transport, Alternative Cooling Technologies and Applications, Advanced Energy Conversion Systems and Integration of Thermal Systems, Renewable Energy, and Waste Heat Utilization
The following list shows current research projects being conducted.
- Cold Climate Heat PUMP (DOE)
- High-Temperature Heat Pump (DOE)
- Heat Pump Driven Multi-stage Dryer (DOE)
- Next Generation PHX (DOE)
- Thermal Management of Dehydrogenation (DOE)
- Isothermal Compression (DOE)
- Elastocaloric cooling (DOE)
- PCM Heat Exchangers (DOE)
- VRF System Modleing and Field Test
The following list shows research projects completed between 2022 and 2023.
- Next Generation Heat Exchanger (DOE)
- Electrochemical Compression (ARPA-e)
- Electrochemical Dehumidification (DOE)
- Roving Comforter
He teaches following courses:
- ENPM808C: Ocean Energy Harvesting
- ENME635: Energy Conversion Systems
- ENME701: Sustainable Energy Production and Utilization
- ENPM 651: Heat Transfer for Modern Applications
- ENME423: Building Cooling, Heating, and Power Integration
- ENME489M: Special Topics in Mechanical Engineering, Ultra-low Energy Use Appliance Design II
- ENME489M: Special Topics in Mechanical Engineering, Ultra-low Energy Use Appliance Design I
- ENME808L: Ultra-low Energy Use Appliance Design II
ENME808P: Ultra-low Energy Use Appliance Design I
His innovative research during the last 39 years has resulted in 382 publications, including two books, ten book chapters, and 20 patents. Scopus data prove his high research impact: h_index 47 with 7,1571 citations. He was selected as an author of one of the top 1% most highly cited papers in the author's field worldwide (2016). His six publications were selected as either the most cited articles or the most downloaded articles from Elsevier.
Three Most cited Articles from Elsevier
- Review of cold storage materials for air conditioning application, Volume 35, Issue 8, December 2012, Pages 2053-2077, Int. J. of Refrigeration, Gang Li, Yunho Hwang*, Reinhard Radermacher
- Refrigerant injection for heat pumping/air conditioning systems: Literature review and challenges discussions, Int. J. of Refrigeration, Volume 34, Issue 2, March 2011, Pages 402-415, Xing Xu, Yunho Hwang*, Reinhard Radermacher
- Optimization of propane pre-cooled mixed refrigerant LNG plant, Volume 31, Issues 6-7, May 2011, Pages 1091-1098, Applied Thermal Eng., Abdullah Alabdulkarem, Amir Mortazavi, Yunho Hwang*, Reinhard Radermacher, Peter Rogers
Three Most downloaded Articles from Int. J. of Refrigeration
- A review of elastocaloric cooling: Materials, cycles and system integrations, April 2016, Suxin Qian, Yunlong Geng, Yi Wang, Jiazhen Ling, Yunho Hwang*, Reinhard Radermacher, Ichiro Takeuchi, Jun Cui
- Recent advances in vapor compression cycle technologies, December 2015, Chasik Park, Hoseong Lee, Yunho Hwang*, Reinhard Radermacher
- Review of solar thermal air conditioning technologies, March 2014, Ali Al-Alili, Yunho Hwang*, Reinhard Radermacher