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Improving Vapor Compression System Efficiency through Advance Vapor Compression Technologies

Event Type
Mechanical Science and Engineering
4100 Sidney Lu Mechanical Engineering Building
Mar 8, 2022   4:00 pm  
Professor Eckhard A. Groll, Mechanical Engineering, Purdue University
Originating Calendar
MechSE Seminars


The phase-out of ozone depleting and climate changing refrigerants as well as recent advances in compressor and other vapor compression component technologies, such as novel capacity control methods, use of smart sensors, materials and manufacturing practices, has rapidly increased the research efforts related to vapor compression systems for the HVAC&R industry. This paper provides an overview of several research efforts related to novel compression concepts and unique cycle integration measures for refrigeration, air-conditioning and heat pumping applications with the goal to reduce irreversibilities and move system performance closer to Carnot efficiency. These research efforts include multi-stage compression with intercooling, refrigerant injected compression with economization, liquid flooded compression with internal regeneration, and quasi-isothermal compression with cylinder cooling and internal regeneration. The latest state-of-the-art for each of these research efforts will be introduced and discussed.


About the Speaker

Dr. Eckhard A. Groll is the Reilly Professor of Mechanical Engineering and also serves as the William E. and Florence E. Perry Head of Mechanical Engineering. He received his Diploma in Mechanical Engineering from the University of the Ruhr in Bochum, Germany, in 1989 and a Doctorate in Mechanical Engineering from the University of Hannover, Germany, in 1994.  

Prof. Groll’s research focuses on the fundamental thermal sciences as applied to advanced energy conversion systems, components, and their working fluids. He is a world-renown expert in  positive-displacement compressors and expanders. Professor Groll has advised more than 100 graduate students and more than 150 undergraduate project students, visiting scholars, and visiting research associates. He has authored or co-authored more than 400 archival journal articles and conference papers, and he has co-authored 7 book chapters and served as the editor or co-editor of 7 conference proceedings. He holds 4 patents. He has a given more than 100 invited lectures and seminars, and 15 conference keynote lectures. He serves as Regional Editor for the International Journal of Refrigeration and is a fellow of the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE). Prof. Groll has received numerous awards for his research and teaching excellence including most notably being named a 2020 Honorary Fellow of the Institution of Engineers in Scotland, the 2018 J&E Hall International Gold Medal in Refrigeration by the Institute of Refrigeration, and the 2017 Peter Ritter von Rittinger International Heat Pump Award by the IEA Heat Pump Centre.  In addition, he was inducted into Purdue’s Book of Great Teachers in 2008.



Host:  Professor Sophie Wang

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