I have good news and bad news. First, the good news . . .
\nWith a history of driving up lab utility bills more than their share, it’s good to see compressor-based ultra-low freezer manufacturers aspiring to develop more energy-efficient ULTs. We applaud this effort and are encouraged to see the lab sustainability imperative gaining a foothold within the research community. In a relatively short time, I believe that Stirling Ultracold has played a positive role in helping to change the industry mindset. By introducing an innovative, energy-efficient cooling technology to the ULT marketplace, we have proven that dramatic sustainability improvements are possible without compromising cooling performance or system reliability.
\nAnd now for the bad news . . .
The industry’s move toward energy efficiency has led some to perpetuate the disproven myth that cooling integrity must be compromised to save energy. In a world that assumes all ultra-low freezers are powered by inherently inefficient compressor technology, this myth actually appears to be true. However, it’s not true in today’s world, where the Stirling engine is a proven alternative to compressors. That’s why cascade freezer manufacturers would like you to forget that the myth of “necessary compromise” has been disproven by the Stirling SU780UE, through years of third-party data, an independent DOE study and EPA industry-standard test results.
The false axiom that cooling performance must be traded for energy savings and economy has been designed into some compressor-based ULTs. By offering two operation modes, these freezers either prioritize energy efficiency or cooling performance (i.e. temperature stability) based on operating conditions and/or user selection. However, they can’t have both at the same time!
\nIs it realistic to ask a researcher, who has years of work depending on the preservation of precious biological samples, to make a choice that reduces cooling performance integrity . . . for any reason . . .at any time? Energy managers, who have little control over day-to-day ULT storage operation, might well assume that energy efficiency will be turned “off” if there is even the slightest perceived risk to sample security or piece of mind.
\nWhy make this false choice when you don’t have to? With the Stirling SU780UE, you’ll use less energy than any comparable ULT freezer, while preserving biological samples with the industry’s best cooling performance integrity . . . all at the same time.
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