John M. Pfotenhauer

Professor

1329 Engineering Research Building
1500 Engineering Drive
Madison, WI 53706

Ph: (608) 263-4082
Fax: (608) 262-8464
pfot@engr.wisc.edu


Profile Summary

Examples of current interests include developing adjustable phase shifters for pulse tube refrigerators, investigating the formation of solid cryogens in cryopumps, defining performance maps for cryogenic regenerative heat exchangers, and exploring the possible use of cryogenics to capture CO2 and pollutants from the effluent of coal-fired power plants. His research explores the development and application of refrigeration cycles, material properties, and thermal design, all at low temperatures.Cryogenic refrigeration cycles, (cryocoolers) of particular interest include pulse tube refrigerators, mixed-gas Joule-Thomson refrigerators, and various hybrid coolers.Professor Pfotenhauer also explores the integration of cryocoolers for cooling superconducting magnets and electronics, for processing and storing cryogens, and for space applications.He applies the fundamental principles of heat transfer, thermodynamics, and fluid dynamics to address the unique challenges that are encountered in these exciting low temperature applications. Professor Pfotenhauer co-directs the research activities in the Cryogenics Laboratory, and oversees the operation of the Liquid Helium / Nitrogen Facility.

Education

  • PhD 1984, Physics, University of Oregon-Eugene
  • MA 1981, Physics, University of Oregon-Eugene
  • BA 1979, St. Olaf College

Research Interests

  • low temperature refrigeration
  • cryogenics
  • applied superconductivity

Awards, Honors and Societies

Kuang-piu Chair Professor, Zhejiang University: 6/1/2012

1000 Experts Projects of Zhejiang Province:12/5/2012

Cryongenic Society of America Fello: April 2013

Publications

Books

B.Z. Maytal and J.M. Pfotenhauer, Miniature Joule-Thomson Cryocooling - Principles and Practice, Springer, NY 2013.

Peer Reviewed Journals

1. L.D. Fonseca, F.K. Miller, and J.M. Pfotenhauer, “A Helium Based Pulsating Heat Pipe for Superconducting Magnets,” Advances in Cryogenic Engineering, vol. 59, AIP, Melville, NY. pp. 28-35 (2013).

2. C.E. Swanson, J.W. Elzey, R.E. Hershberger, R.J. Donnelly, J.M. Pfotenhauer, “Thermodynamic Analysis of Low Temperature Carbon Dioxide and Sulfur Dioxide Capture from Coal Burning Power Plants,” Physical Review E, vol. 86, pp. 016103:1-9, (2012).

3.  L.M. Qiu, Q. Cao, X.Q. Zhi, L. Han, Z.H. Gan, Y.B. Yu, Y. Liu, X.J. Zhang, J.M. Pfotenhauer, “Operating Characteristics of a Three-Stage Stirling Pulse Tube Refrigerator Operating Around 5 K,” Cryogenics vol. 52, p. 382-388  (2012). 

4. J.W. Leachman, J.M. Pfotenhauer, G.F. Nellis, “Dynamic Shear Stress and Heat Transfer of Solid Hydrogen, Deuterium, and Neon,” Journal of Applied Physics vol. 111 (8), pp. tbd. (2012).

5. D.C. Potratz, J.M. Pfotenhauer, Q. Hasse, Y. Ivanyushenkov, E.R. Moog, and R.L. Kustom, “A Helium Thermosiphon Cooling Loop for the APS Superconducting Undulator,” Advances in Cryogenic Engineering vol. 57, AIP, Melville, N.Y., pp. tbd  (2012) 

6. J.D. Fuerst, C. Doose, Q. Hasse, Y. Ivanyushenkov, M. Kasa, E.R. Moog, J.M. Pfotenhauer, D.C. Potratz, D. Skiadopoulos, V.M. Syrovatin, and E.M. Trakhtenberg, “Cryostat Design and Development for a Superconducting Undulator for the APS,” Advances in Cryogenic Engineering vol. 57, AIP, Melville, N.Y., pp. tbd  (2012)

7. W.J. Zhou, L.Y. Wang, Z.H. Gan, L.M. Qiu, J.M. Pfotenhauer, “The Performance of a Linear Compressor with Triangle Flexure Bearings,” Advances in Cryogenic Engineering vol. 57, AIP, Melville, N.Y., pp. 1617-  (2012)

Links

Courses

Summer 2014

  • NE 790 - Master\'s Research and Thesis

  • ME 990 - Dissertator Research and Thesis
  • ME 890 - PhD Research and Thesis
  • ME 790 - Master\'s Research and Thesis
  • ME 491 - Mechanical Engineering Projects I
  • ME 370 - Energy Systems Laboratory
  • ME 489 - Honors in Research
  • NE 790 - Master\'s Research and Thesis
  • ME 990 - Dissertator Research and Thesis
  • ME 890 - PhD Research and Thesis
  • ME 790 - Master\'s Research and Thesis
  • ME 699 - Advanced Independent Study
  • ME 491 - Mechanical Engineering Projects I
  • ME 299 - Independent Study
  • Profile Summary

    Examples of current interests include developing adjustable phase shifters for pulse tube refrigerators, investigating the formation of solid cryogens in cryopumps, defining performance maps for cryogenic regenerative heat exchangers, and exploring the possible use of cryogenics to capture CO2 and pollutants from the effluent of coal-fired power plants. His research explores the development and application of refrigeration cycles, material properties, and thermal design, all at low temperatures.Cryogenic refrigeration cycles, (cryocoolers) of particular interest include pulse tube refrigerators, mixed-gas Joule-Thomson refrigerators, and various hybrid coolers.Professor Pfotenhauer also explores the integration of cryocoolers for cooling superconducting magnets and electronics, for processing and storing cryogens, and for space applications.He applies the fundamental principles of heat transfer, thermodynamics, and fluid dynamics to address the unique challenges that are encountered in these exciting low temperature applications. Professor Pfotenhauer co-directs the research activities in the Cryogenics Laboratory, and oversees the operation of the Liquid Helium / Nitrogen Facility.


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