Faculty Directory

Radermacher, Reinhard

Radermacher, Reinhard

Minta Martin Professor
Director, Center for Environmental Energy Engineering
Mechanical Engineering
Maryland Energy Innovation Institute
Center for Environmental Energy Engineering
4164A Glenn L. Martin Hall, Building 088
Website(s):

EDUCATION

  • Ph.D., Physics, Technical University Munich, Germany, 1981
  • Diploma, Physics Technical University Munich, Germany, 1977

BACKGROUND

Dr. Radermacher is an internationally recognized expert in energy conversion systems; in particular heat pumps, air-conditioners and refrigeration systems and integrated Cooling, Heating and Power (CHP) Systems.  His work has resulted in over 500 publications, including 3 books, more than 200 invention records and 15 patents. He was a visiting scientist and NATO scholar at the National Institute of Standards and Technology before joining the University of Maryland.

HONORS AND AWARDS

  • 2015 J&E Hall Gold Medal, British institute of Refrigeration
  • 2015 Gustav Lorentzen Medal, International Institute of Refrigeration
  • 2006 ASHRAE Fellow
  • 2004 ASHRAE Exceptional Service Award
  • 2002 ASHRAE Distinguished Service Award
  • 2001 Inductee, A. James Clark School of Engineering Innovation Hall of Fame

PROFESSIONAL MEMBERSHIPS

  • Fellow ASHRAE,  TC 8.3 and 8.9, 1992-2019, held positions of Secretary, Vice Chair, and Chair, Chair of ASHRAE's Strategic Reserch Plan Adhoc Committee 2019-2021
  • IIR (International Institute of Refrigeration), Lifetime MemberPresident, Commission B2, 1999-2003
  • U.S. Representative to International Energy Agency, Annex XIII, 1986-1990, 
  • International Journal of Refrigeration, Associate Editor (1998-2002)
  • Editor-in-Chief (2002-2019) Science and Technology for the Built Environment, the Research Journal of ASHRAE
  • Reviewer, Applied Thermal Engineering; International Journal of Heat and Mass Transfer; International Journal of Thermophysics; Numerical Heat Transfer, Chemical Engineering Research and Design, Part A; Transactions of the American Society of Heating, Refrigeration, and Air-Conditioning Engineers; Solar Energy Engineering; American Society of Mechanical Engineers, Transactions, and Conference Contributions
  • Conference Co-Chairman, International Sorption Heat Pump Conference, New Orleans, 1994, Denver, 2005, College Park 2014

 

Vapor Compression Heat Pump, Refrigeration and Air-conditioning Systems, Software for the Design and Optimization of Thermal Systems, Single and Multi-Stage Absorption and Adsorption Systems, Conventional and Natural Working Fluids and Working Fluid Mixtures, Solar Cooling, Ocean Thermal Energy Technology, Cooling, Heating and Power (CHP) Systems Heat Pumps and Building Integration, Separate Sensible and Latent Cooling, Isothermal Compression, Compact air-to-refrigerant Heat Exchangers, Two-phase flow and heat transfer


Graduate and Undergraduate courses in energy conversion, renewable energy and heat pumping, air-conditioning and refrigeration

Recent Publications

  1. Eldeeb, R., Aute, V., Radermacher, R., Pillow plate heat exchanger weld shape optimization using approximation and parallel parameterized CFD and non-uniform rational B-splines, International Journal of Refrigeration 110, 121-131, February 1, 2020.
  2. Huang, Z., Ling, J., Bacellar, D., Hwang, Y., Aute, V., Radermacher, R., Airside thermal and hydraulic characteristics of compact bare tube heat exchanger under dry and wet conditions, International Journal of Refrigeration 110, 295-307, February 1, 2020.
  3. Qiao, Y., Cao, T., Muehlbauer, J., Hwang, Y., Radermacher, R., Experimental study of a personal cooling system integrated with phase change material, Applied Thermal Engineering 170, 115026, April 1, 2020.
  4. Huang, Z., Ling, J., Hwang, Y., Aute, V., Radermacher, R., Airside heat transfer and friction characteristics of a 0.8 mm diameter bare tube heat exchanger, Heat Transfer Engineering 41 (19-20), 1720-1730, November 12, 2020.
  5. Dhumane, R., Ling, J., Aute, V., Radermacher, R, Performance comparison of low GWP refrigerants for a miniature vapor compression system integrated with enhanced phase change material, Applied Thermal Engineering, Vol. 182, 116160, January 2021.
  6. Ling, J., Dalgo, D., Zhu, S., Qiao, Y., Wang, L., Aute, Srebric, J., Muehlbauer, J., Hwang, Y., Radermacher, R, Energy savings and thermal comfort evaluation of a novel personal conditioning device, Energy and Buildings, Vol. 241, 110917, June 15, 2021.
  7. Dhumane, R., Qiu, T., Ling, J., Aute, V., Hwang, Y., Radermacher, R., Kirkwood, A.C., Esformes, J., Investigation of the Variability in the Measurement of Cyclic Degradation Coefficient of Air Conditioning Systems, International Journal of Refrigeration, April 20, 2021.
  8. Suzukida, J., Bacellar, D., Radermacher, R., Home Retrofit Results In Net Positive Energy Operation, ASHRAE Journal, June 2021.
  9. Gao, L, Liu, T., Cao, T., Hwang, Y., Radermacher, R., Comparing deep learning models for multi-energy vectors prediction on multiple types of building, Applied Energy 301, 117486, 2021.
  10. Gao, L., Cao, T., Hwang, Y., Radermacher, R. Graph-based configuration optimization for S-CO2 power generation systems, Energy Conversion and Management 244, 114448, 2021.
  11. Wan, H., Cao, T., Hwang, Y., Radermacher, R., Chin, S., Comprehensive investigations on Life Cycle Climate Performance of unitary air-conditioners, International Journal of Refrigeration 129, 332-341, September 1, 2021.
  12. Gao, L., Tao, C., Hwang, Y., Radermacher, R., Robustness analysis in supercritical CO2 power generation system configuration optimization, Energy 242, March 1, 2022.
  13. Chen, D., Riaz, A., Aute, V., Radermacher, R., A solid-liquid model based on lattice Boltzmann method for phase change material melting with porous media in cylindrical heat exchangers, Applied Thermal Engineering, January 29, 2022.
  14. Qian, S., D. Catalini, J. Muehlbauer, B. Liu, H. Mevada, H. Hou, Y. Hwang, R. Radermacher, I. Takeuchi, High-performance multimode elastocaloric cooling system, Science. May 19, 2023; 380(6646):722-727. DOI:10.1126/science.adg7043.
  15. Baker, J., L. Cao, Y. Hwang*, C. Wang, and R. Radermacher, Performance investigation of an electrochemical ammonia compressor stack, Int. J. of Refrigeration, 153, 67-77, September 2023. https://doi.org/10.1016/j.ijrefrig.2023.05.020.

CEEE Team Innovates Efficient HVAC&R Compressor Technology

Researchers develop the first near-isothermal compressor using a liquid piston.

Celebrating Five Years of Innovation at CEEE’s Daikin Lab

Researchers are developing the next generation of lean and green HVAC technology in this state-of-the-art lab.

How Much Wood Could a Heat Pump Dry?

A CEEE paper makes the case for heat pumps as an eco-friendly alternative for drying loads of lumber throughout the world.

Jump Start Program Gives CEEE Grad Students a Boost

A new workshop helps research assistants get up to speed on the fundamentals of HVAC technologies.

UMD to Host International Graduate Engineering Course on Sustainability

The world goes to Maryland for a summer 2025 course on sustainable energy.

DOE Ups Its Investment in UMD to Develop Eco-Friendly Heat Pumps

Agency awards UMD and partners $4.8 million to improve heat pump performance and safety.

New NSF Research Center Taps Into CEEE’s Expertise on Eco-Friendly HVAC&R

Maryland Engineering and partners win $26M to develop better HVAC&R systems and fight climate change

Maryland Engineering and Partners Win $26M to Develop Better HVACR Systems and Fight Climate Change

Clark School faculty and partners join prestigious U.S. National Science Foundation Engineering Research Center.

Maryland Public Television Highlights UMD Research on Groundbreaking Cooling Technology

Researchers are developing an innovative, climate-friendly solution

Elastocaloric Cooling Named One of the Top 10 Emerging Technologies to Address Global Challenges

UMD researchers are developing breakthrough cooling technology that is climate-friendly and efficient

Farewell to Postdoc Researcher Lei Gao

CEEE researcher to continue heat pump research at Oak Ridge National Laboratory

A Challenging Road Ahead to Eco-Friendly Refrigerants

CEEE/DOE/ORNL–hosted workshop brings together stakeholders to identify the challenges of transitioning to ultra-low GWP refrigerants  

UMD Staff Are the Students in a “Cool” New CEEE-Led Training

CEEE director trains UMD facilities management staff on air conditioning principles and applications

CEEE Researcher Named Finalist in UMD’s 3MT Competition

Het Mevada Wows Clark School Judges in “Three Minute Thesis” Contest

Elastocaloric Cooling System Co-Developed by CEEE Faculty Featured in Science

With the new technology, the materials remain in a solid state as compared to traditional refrigerants.

UMD ME Faculty Ranked in Top 2% of Scientists Worldwide

The department is home to some of the most widely-cited researchers in their fields.

Crank Up the AC, Not Global Warming

Maryland engineers advance heating and cooling technology to push for a greener future

CEEE Graduate Research Assistants Jangho Yang and Zhenyuan Mei Receive Engie Fellowships

The fellowship provides financial support to fund students' research and graduate assistant positions.

Materials, physics, and systems for multicaloric cooling

UMD’s Ichiro Takeuchi published in Nature Reviews Materials

Dr. Hwang Receives Achievement and Leadership Award  

Hwang was presented The Wilbur T. Pentzer Achievement and Leadership Award at the Herrick Conference at Purdue

CEEE: Three Decades of Innovation

The UMD-based center marked its 30th anniversary at a gala event on June 9.

Faculty Editorial: 30 Years of CEEE

by Dr. Reinhard Radermacher

CEEE Wins Best Session Paper Award for Experimental Methods at The 15th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT)

The paper is titled "Design Optimization and Experimental Validation of Heat Exchangers Utilizing High Performance, Non-round Tubes.”

CEEE Recognizes Senior Faculty Specialist Jan Muehlbauer for 15 Years of Exceptional Service

He was presented a plaque by Director Reinhard Radermacher in recognition of dedication to CEEE for 15 years.

Dr. Daniel Bacellar Promoted to Assistant Research Professor

Bacellar joined CEEE’s faculty in spring 2020 as a faculty research associate.

Director Editorial: Global vs Local Hazards

by CEEE Director Reinhard Radermacher

A Business up to 100 Times Bigger than that of ESCOs

Editorial by CEEE Director Dr. Reinhard Radermacher

Alumni Spotlight: Brian Ottens

What does solar system habitability research and mushroom farming have in common? Thermodynamics.

Dr. Jiazhen Ling Promoted to Associate Research Professor

Ling has been with CEEE since receiving his Ph.D. from UMD in 2011

Jan Muehlbauer Promoted to Senior Faculty Specialist

Muehlbauer has been with the University for 14 years since receiving his master's degree in 2006. 

UMD receives two new DOE Building Technologies awards

Takeuchi and Aute to lead projects 

Welcome Back, Dr. Daniel Bacellar!

“It’s good to be home - old family, new challenges!”

Failure is an Option

Alumni Profile: Cara Martin

Clark School Opens New Daikin Energy Innovation Laboratory

The Clark School formally opened the Daikin Energy Innovation Laboratory in honor of its more than 20-year partnership with global manufacturer Daikin.

Dr. Hwang and Dr. Aute Named New CEEE Co-Directors

They aim to expand CEEE's status as one of the leading Centers for HVAC&R Research in the world

Dr. Radermacher Named Operating Agent of IEA Annex 53

Annex 53 kicked off on Jan. 11 at the ASHRAE conference in Atlanta.

David Catalini Awarded Graduate Student Summer Research Fellowship

Plans to make significant strides in his research on elastocaloric cooling.

Kailkhura and Vathsavai Win Best Consortium Student Presentation Award, Spring 2019

Research sponsors voted theirs best out of 15 presentations.

RoCo Advances to Beta Test Before Public Launch

Roving comforter offers personal cooling and significant energy savings.

Lei Gao Admitted into the Future Faculty Program

Research topic is on micro-grid system optimization.

CEEE Researchers Win ASHRAE Best Paper Award

Chosen as best out of 107 papers published in 2017 in Science and Technology for the Built Environment.

Dr. Vikrant Aute Wins Provost’s Excellence Award for Professional Track Faculty

Recognized for his outstanding contributions in research.

Zhenning Li Wins Best Student Consortium Presentation Award

Research was on 'CoilDesigner Updates'.

2018 ARPA-E Summit to Showcase UMD Innovations

UMD Energy Innovation Technologies dominate

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.

Ransisi Huang wins best student consortium presentation award

'Steady State Modeling and LCCP of Vapor Compression Systems/VapCyc Updates' was the winning presentation.

Catalini and Leininger win 2017 GDF-Suez Chuck Edwards Memorial Fellowships

Fellowships of $25,000 each help fund the students’ research.

Researchers Introduce RoCo, a Mobile Personal Heating and Cooling Device

UMD Invention Has Potential to Cut Energy Costs in Residential and Large Building AC

Visiting German Researcher Investigates ground-coupled desiccant air conditioning system at CEEE

"There’s a lot of freedom at CEEE to pursue your passions", says Arne Speerforck.

UMD and Mobile Comfort demonstrate robotic cooling machine at 2017 ARPA-E Technology Showcase

UMERC is a multidisciplinary initiative dedicated to advancing the frontiers of energy science and technology.

Energy Sustainability Students Advises Small Town in Western Maryland on Becoming Grid Independent

The class projected that Friendsville could create its own energy and completely support itself for the majority of the year.

Ye Tao Wins Best Student Presentation Award for Fall CEEE Consortium Meeting

His paper, Electrochemical Compression, won amoungst strong competition.

Five Mechanical Engineering Graduate Students Selected for Clark School Future Faculty Program

Graduate students selected for program designed to produce next great engineering professors.

UMD has Largest University Showing at 2016 ARPA-E Summit

UMD researchers showcase transformative energy research at ARPA-E Energy Innovation Summit

The University of Maryland Receives $50,000 Grant from Dominion Foundation

Award supports new research on high efficiency solar-powered cooling systems.

UMD Startup To Solve Energy Conversion Challenges in Thermal Systems

Optimized Thermal Systems provides engineering consulting for HVAC&R systems.

UMD Teams Awarded Over $5 Million to Improve Power Plant Cooling Technologies

The U.S. Energy Department’s Advanced Research Projects Agency-Energy (ARPA-E) funds two UMD teams to improve power plant cooling efficiency.

Radermacher recognized as UMD's most prolific inventor

CEEE director presented with the campus Corporate Connector of the Year Award.

Suxin Qian Awarded Ann G. Wylie Dissertation Fellowship

Shape memory alloys provide cooling as well as heat-pumping.

Radermacher to Receive IIR Gustav Lorentzen Medal

The International Institute of Refrigeration recognizes Professor Reinhard Radermacher for his contributions to the field of refrigeration.

Radermacher Receives Institute of Refrigeration J&E Hall Gold Medal

Reinhard Radermacher recognized for pushing research frontiers in energy efficiency and environmentally sustainable thermal systems.

Saving Energy with ‘Personal HVAC Systems’

UMD awarded more than $5 million by ARPA-E to fund potentially transformational research.