Understanding the Impact of Ultra-Low Cooling Technology on Lab Sustainability

August 20, 2015
1 p.m. – 2 p.m.
Eastern Daylight Time


The ultra-low temperature freezer (ULT) is a staple in the research environment and a necessary tool for active projects and as a long-term storage facility after the research work has been completed. Due to the combination of the significant energy consumption of cascade-compressor ULT freezers and their greenhouse gas emissions from CFC/HCFC usage, there is a surprising financial and sustainability impact of ultra-low cooling technology that must be fully considered in the planning and management of laboratory facilities.

During this webinar presentation, Tim Kehrli of Stirling Ultracold will compare cascade-compressor ULT freezer cooling technology with a new kind of ultra-low cooling technology that uses the Stirling engine. He will examine ULT freezer technology to develop an understanding of energy use and the significant reductions in electrical loads that are made possible by the Stirling engine, while meeting the cooling requirements of the research community. This presentation will also reference the impact of the U.S. Environmental Protection Agency (EPA) and ULT manufacturers' effort to publish an industry-standard test method for accurately comparing ULT energy usage and performance.

The presenter:

  • The technology differences between linear free-piston Stirling engines and conventional cascade compressors in ultra-low temperature freezers.
  • The life cycle cost of a mechanical ultra-low -80°C freezer and its impact on laboratory operations and new construction cost.
  • The scope and impact of the EPA's new ENERGY STAR® Product Specification for Laboratory Grade Refrigerators and Freezers, and Ultra-Low Temperature Freezers Final Test Method.
  • The energy consumption, financial and sustainability benefits that Stirling engine freezers can offer.


Sign up to view the recording.

I2SL Members and IFMA Research and Development Council Members can register for free! Visit the Member Portal or check with your IFMA member coordinator for additional instructions.

Professional Development Hours and Continuing Education Credits

Webinar attendees and those who view the recording can earn one Professional Development Hour (PDH) for professional engineers or one Learning Unit (LU) from the American Institute of Architects for registered architects.

Contact I2SL after the webinar if you would like to receive a credit for your participation.

Instructor Biographies

Tim Kehrli is the West Coast Strategic Account Manager for Stirling Ultracold, Division of Global Cooling, Inc. He has been a leading advocate and driver in the federal energy efficiency and sustainable energy space for more than 20 years. Mr. Kehrli continues his work in the global energy efficiency and sustainability field through activities with the International Institute for Sustainable Laboratories where he has been a board member since 2010.

Mr. Kehrli holds a Bachelor of Science in mathematics from the University of Puget Sound and has completed the course work for a Master of Science in mechanical engineering from the University of Minnesota.


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