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Dr. Reinhard Radermacher

Radermacher, Reinhard

Minta Martin Professor of Engineering
Professor of Mechanical Engineering
Director, Center for Environmental Energy Engineering


Reinhard Radermacher holds a diploma and Ph.D. in physics from the Technical University of Munich and conducts research in heat transfer and working fluids for energy conversion systems — in particular heat pumps, air-conditioners, refrigeration systems, and integrated cooling heating and power systems.

His work resulted in more than 530 publications, as well as numerous invention records and 14 patents. He has co-authored three books on absorption and vapor compression heat pumps.  His research includes the development of software for the design and optimization of heat pumps and air-conditioners which is now in use at more than 80 companies worldwide.

Dr. Radermacher is Minta Martin professor of Mechanical Engineering and director and co-founder of the Center for Environmental Energy Engineering (CEEE). He represents the U.S. at the International Energy Agency Annexes 13, 34 and 40, is past vice president of Commission B1, and past president of Commission B2 of the International Institute of Refrigeration (IIR).  

In February 2015 he was awarded the Institute of Refrigeration (IOR) J&E Hall Gold Medal for his contributions in the field of refrigeration.  The International Institute of Refrigeration (IIR) awarded Radermacher with the 2015 Gustav Lorentzen Medal for his innovation and development in the field of refrigeration.  He received the award at the IIR International Congress of Refrigeration (ICR2015) held in August 2015 in Yokohama, Japan.

He is Fellow ASHRAE and also holds memberships in ASME, SAE, DKV and IIR and serves as the editor of the ASHRAE Science and Technology for the Built Environment. He is co-founder and co-owner of Optimized Thermal Systems, providing custom simulation software services and innovative solutions to energy conversion challenges.


  1. Heat Conversion Systems, Georg Alefeld, Reinhard Radermacher, 1993 by CRC Press, 304 Pages ISBN 9780849389283
  2. Absorption Chillers and Heat Pumps, Keith E. Herold, Reinhard Radermacher, Sanford A. Klein. 1996 by CRC Press, 356 Pages, ISBN 9780849394270
  3. Vapor Compression Heat Pumps with Refrigerant Mixtures, Reinhard Radermacher, Yunho Hwang, 2005 by CRC Press, 328 Pages - 190 B/W Illustrations, ISBN 9780849334894

Select Publications:


  1. Al-Alili, A., Hwang, Y., Radermacher, R., Solar Hybrid Air Conditioner: Model Validation and Optimization, Journal of Solar Engineering, Vol. 138 Issue 3, Feb 23, 2016, doi:10.1115/1.4032683.


  1. Qian, S., Ling, J., Hwang, Y., Radermacher, R., Takeuchi, I., Thermodynamics Cycle Analysis and Numerical Modeling of Thermoelastic Cooling Systems, Int. J. of Refrigeration, V. 56, pp. 65-80, 2015
  2. Qian, S., J. Ling, J. Muehlbauer, Y. Hwang*, R. Radermacher, Study on high efficient heat recovery cycle for solid-state cooling, Int. J. of Refrigeration, V. 55, pp. 102-119, 2015
  3. Tao, Y., H. Lee, Y. Hwang, R. Radermacher, C. Wang, Electrochemical Compressor Driven Metal Hydride Heat Pump, Int. J. of Refrigeration, Volume 60, Pages 278–288, December 2015
  4. Cao, T., H. Lee, Y. Hwang, R. Radermacher, H, Chun, Performance Investigation of Engine Waste Heat Powered Absorption Cycle Cooling System for Shipboard Applications, Applied Thermal Engineering, V. 90, pp. 820-830,05/2015
  5. Huang, L., Aute, V., and Radermacher, R., “Air flow distribution and design optimization of variable geometry microchannel heat exchangers”, Science and Technology for the Built Environment, Vol. 21, No. 5, pp. 693-702, 2015


  1. Al-Alili, A.,  Hwang, Y.,  Radermacher, R., Review of solar thermal air conditioning technologies, International Journal of Refrigeration, vol. 39 (2014)
  2. Huang, L., Lee, M. S., Saleh, K., Aute V., Radermacher, R.,  “A computational fluid dynamics and effectiveness-NTU based co-simulation approach for flow mal-distribution analysis in microchannel heat exchanger headers”, Applied Thermal Engineering, Vol. 65, pp. 447-457, 2014
  3. Huang, L., Aute, V., Radermacher, R., “A model for air-to-refrigerant microchannel condensers with variable tube and fin geometries”, Intl. J. of Refrigeration, Vol. 40, pp. 269-281, 2014
  4. Qiao, H., Aute, V., Radermacher, R., “Transient modeling of flash tank vapor injection heat pump system – Part I: Model development”, Intl. J. of Refrigeration, Vol. 49, pp. 169-182, 2014


  1. Saleh, K., Abdelaziz, O., Aute, V., Radermacher, R., and Azarm, S. Approximation Assisted Optimization of Headers for New Generation of Air-Cooled Heat Exchangers, Applied Thermal Engineering, Volume 61, Issue 2, 3 November 2013, Pages 817–824.  
  2. Aute V., Abdelaziz O., Saleh K., Azarm S., Radermacher, R., Cross-Validation Bases Single Response Adaptive Design of Experiments for Kriging Metamodeling of Deterministic Computer Simulations,  Structural and Multidisciplinary Optimization, 2013 DOI: 10.1007/s00158-013-0918-5.
  3. Lee, H., Hwang, Y., Radermacher, R., Chun, H., Potential Benefits of Saturation Cycle with Two-Phase Refrigerant Injection, Applied Thermal Engineering, V.56, pp. 27-37, 01/2013.


  1. Okuma, T.*, R. Radermacher, and Y. Hwang. A Novel Application of Thermoelectric Modules to an HVAC System under Cold Climate Operation, J. of Electronic Materials, V. 41, N 6, pp. 1749-1758, 04/2012
  2. Li, G.,  Hwang, Y.,  Radermacher R., Review of cold storage materials for air conditioning application, International Journal of Refrigeration, Vol. 35, Issue 8 (2012)
  3. Al-Alili, A.,  Hwang, Y.,  Radermacher, R.,  Kubo, I., A high efficiency solar air conditioner using concentrating photovoltaic/thermal collectors, Applied Energy, vol. 93 (2012)
  4. Qiao H., Aute V., Lee H., Saleh K., Radermacher R., A new model for plate heat exchangers with generalized flow configurations and phase change, Intl. J. of Refrigeration, Vol. 36, No. 2, pp. 622-632, 2012


  1. Alabdulkarem, A.,  Mortazavi, A.,  Hwang, Y.,  Radermacher, R.,  Rogers, P., Optimization of propane pre-cooled mixed refrigerant LNG plant  Applied Thermal Engineering, vol. 31, issue 6-7 (2011)


  1. Ling, J., Hwang, Y., and Radermacher, R., Theoretical Study on Separate Sensible and Latent Cooling Air-Conditioning System, International Journal of Refrigeration, V.33, pp. 510-520, 2010
  2. Wang, K.,  Eisele, M.,  Hwang, Y.,  Radermacher, R., Review of secondary loop refrigeration systems, International Journal of Refrigeration, vol. 33, issue 2, 2010
  3. Abdelaziz O., Aute V., Azarm S., Radermacher R., 'Approximation Assisted Optimization For Novel Compact Heat Exchanger Designs’, HVAC&R Research Journal, Vol 16 (5), pp. 707-728, 2010


  1. Wang, X.,  Hwang, Y.,  Radermacher, R., Two-stage heat pump system with vapor-injected scroll compressor using R410A as a refrigerant, International Journal of Refrigeration, vol. 32, issue 6 (2009)
  2. Singh V., Aute V., Radermacher R., "A heat exchanger model for air-to-refrigerant fin-and-tube heat exchanger with arbitrary fin sheet", Intl. J. of Refrigeration, Vol. 32, Issue 7, pp. 1724-1735 (2009)


  1. Jiang H., Aute, V., and Radermacher, R. CoilDesigner: A General Purpose Simulation and Design Tool for Air to Refrigerant Heat Exchangers, International Journal of Refrigeration, Volume 29, Issue 4,  pp. 601-610, June 2006