Stirling Ultracold Opens Office in Japan

Taisei Matsumoto, the CEO of Stirling Ultracold Japan, with Neill Lane at the Kiyomizu-dera temple in Kyoto, Japan
Taisei Matsumoto, the CEO of Stirling Ultracold Japan, with Neill Lane at the Kiyomizu-dera temple in Kyoto, Japan

I am pleased to announce that we have taken important step toward becoming a global leader in providing ultra-low temperature freezers.  A new Stirling Ultracold sales and service office was recently opened in Kobe, Japan. The staff in this office serves the Japanese laboratory research and life sciences marketplace, and is dedicated to supporting Stirling Ultracold products in the region.

Our exclusive Japanese partner officially opened this location in late 2014 and is operating the new office.  With a showroom of products and a dependable sales/service team now in Japan, Stirling’s presence and brand has been enhanced in the Asian market.  This also allows us to better serve our global clients who are operating Japanese-based labs.

In addition to a brick and mortar presence, a new Japanese-language Stirling Ultracold Japan website has been created for presenting Stirling Ultracold products to the local market.  With a strong local partner these steps are enhancing our position in the Japanese market and our ability to support the research community, worldwide.

The Hidden Benefit of Energy-Efficient ULT Freezers

It’s no secret that cascade-compressor, ultra-low freezers require large amounts of energy for cooling.  And we know from the first law of thermodynamics that all this energy can’t just be erased, and will be converted into heat.  Outside of the cold box, ULTs are essentially heaters!  Accordingly, an energy-efficient freezer produces less heat because it uses less energy.  That’s why a Stirling Ultracold freezer that uses less than half the energy also rejects less than half the heat.

The Hidden Energy and Cost Benefit – Less Heat Rejection

So, the more ULTs you have running in ULT Heat Rejectionyour research facility, the more heat that must be removed to keep surrounding spaces from becoming uncomfortably hot. What is often overlooked is the HVAC energy cost required to remove that heat.  Based on ASHRAE guidelines, removing the amount of heat typically produced by a single cascade ULT can add an HVAC load of about 6 kWh/day. This is not inconsequential if you consider that the power needed to remove the heat from just two cascade freezers is 25% more than the power used by our 27.5 cu. ft. SU780UE freezer!  Now consider this energy and cost savings multiplied by 100s of ULTs operated in a research facility.  It really adds up.

And don’t forget that hot ambient air around a freezer adversely affects temperature recovery time when the door is opened and that system heat contributes to the disappointing failure rates of compressors.

Impact on New and Upgraded Facilities

For architects and engineers designing new labs or replacing research facility systems, energy-efficient freezers can have a real impact.  By accounting for markedly lower energy consumption and heat rejection, laboratory designers can specify lower-capacity, less-expensive power distribution and HVAC systems. This reduces both the initial cost of the project and the long-term operating cost of the facility.

Third-Party Data Shows Stirling Uses Less than Half the Energy in Real Time

You can now view Stirling Ultracold’s ULT Freezers’ energy-efficiency in real time on the CSIRO Freezer Energy Monitoring Dashboard provided by the Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia’s national science agency.  With the excellent help of our distribution partner, Bioline, this live feed continually monitors the power output of three ultra-low freezers. This live comparison shows our freezer using significantly less than half the energy of the competitors’ cascade freezers.  Now you don’t need to take our word for it, just go look at the data in real time!

Energy Monitoring Real Time
Full day hourly energy usage average of ULT Freezers. (source:

You’ll note that the Stirling SU780 uses far less power than the other two freezers, even though it’s cooling a larger volume.  In fact, if you compare our 780L freezer (27.5 cu. ft.) with the cascade freezer listed at 386L (13.6 cu. ft.), you can calculate that the Stirling uses about a quarter of the energy per liter.

With a respected governmental research agency now monitoring and sharing this energy comparison data in real time for the world to see, there’s really no reason left to doubt the generous energy and cost savings delivered by Stirling freezers over cascade-compressor models.