22 May 2008
This Stirling refrigerator only imparts a light load to the global environment
because it does not use fluorocarbon gas refrigerants. Additionally, it can be said that its
theoretical efficiency is identical to that of the Carnot, with this refrigerator being a
sustainable refrigerating system. To put the Stirling refrigerator into practical use at room
temperature, a smaller sizing, higher durability and higher efficiency are essential. The
authors have designed and developed a 100 W class Stirling refrigerator for household use.
And the operating characteristics of the machine have been evaluated. In addition, to
investigate the possibility of the practical application of Stirling refrigerators to household use,
we have designed and fabricated on an experimental basis a 4th prototype Stirling
refrigerator which uses a sealed oil-lubrication mechanical section, and we are currently
evaluating its performance. As a result, the operational characteristics of the Stirling cycle
machine have been clarified with respect to design factors. These results demonstrate that
the Stirling cycle machine is one of the promising candidates as a new refrigeration system
or a new generation system.