Neill Lane, CEO of Global Cooling, Inc., will discuss the technical capabilities of the Model SU780UE ultra-low temperature freezer at the upcoming Biorepositories and Sample Management Conference in Boston, MA, Sept. 10 at 12:10 p.m. Lane will have a fully functioning SU780UE on the exhibit floor to demonstrate the cooling capacity, pull down capability and energy efficient operation provided by Stirling engine technology.

The Model SU780UE uses 100% natural refrigerants and was recently featured in a U.S. Department of Energy (DOE) study comparing ultra-low temperature freezer performance. No other freezer for sale in the United States offers 100% natural refrigerants in its cooling system. The 27.5 cubic feet SU780UE uses about 10 grams of helium in its Stirling engine and about 90 grams of ethane in the thermosiphon. Helium has no global warming potential (GWP). Ethane has a GWP of 5.5. In contrast, a typical ultra-low freezer sold in the United States uses HFC refrigerants in its cooling system – around 300 to 400 grams of R407D (GWP 1,627) and 600 to 700 grams of R508B (GWP13,396). The net effect is that these refrigerants are up to 17,000 times more damaging to the environment than those in the Model SU780UE cooling system.

The design of the SU780UE is extremely energy efficient and the U.S. DOE has released preliminary results of an independent study of comparative ultra-low temperature freezer performance confirming significant energy reduction of the Stirling Ultracold ultra-low freezer in side-by-side evaluations with top competitors. The study was commissioned by the Better Buildings Alliance Laboratories and performed for the DOE by Navigant Consulting.

Among the findings are both energy savings and economic analyses that rank the Stirling Ultracold -80°C ultra-low freezer first among all freezers tested in power efficiency and return-on-investment.

  • The Stirling Ultracold freezer saves 66% in energy when compared to the average ultra-low freezer as measured in power consumption per cubic foot.
  • The Stirling Ultracold freezer delivers a three-year payback on the additional cost over comparison units compared to nine years and fifteen years from the latest competitive energy-saving freezers tested.

The preliminary results of the study are available directly from the Better Buildings Alliance Laboratories website.

For more information on the Stirling Ultracold ultra-low freezer, visit booth #9 at the Biorepositories and Sample Management conference, contact Stirling Ultracold Sales, or call 740-274-7900.