| Customization: | Available |
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| After-sales Service: | Yes |
| Warranty: | One Year Warranty |
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Free Piston Stirling Cryocoolers are complete CFC-free systems, using natural Helium gas. They are small, portable, and are widely used for precise temperature control for under -160ºC max. The default version of Stirling coolers includes pistons, heat exchangers, and compression spaces. But we see technological advancements in all industries, such as Biotech, Pharmaceutical, Food, Energy, Chemical, Medical, Bio-Science, logistics, and Metrology.
Isovolumetric Exothermic Process
Both pistons move in the same direction at the same time and the volume of gas remains constant until the compression piston reaches its dead center. As the gas passes through the regenerator, the heat is transferred to the packing, the temperature is reduced, and the pressure is also reduced.
Isothermal Compression
The compression piston moves while the expansion piston does not. Gas is isothermally compressed, compression heat is transferred through the cooler to the coolant (water or air), the temperature is maintained, pressure is increased, and volume is decreased.
Isothermal Expansion Process
The compression piston stops at the stop point while the expansion piston continues to move to the stop point. The gas is isothermally expanded and absorbs a certain amount of heat (cooling capacity) from the low-temperature heat source (cooling object) through the cold heat exchanger. The volume increases and the pressure decreases.
Constant Volume Heating Process
Both pistons move in the same direction at the same time to the stop point, the gas volume remains unchanged and returns to the starting position. As the gas passes through, it absorbs heat from the regenerator packing, and the temperature increases while the pressure increases.
| Model | RS40 |
| Voltage | 12V |
| Refrigerant | Helium=2.5g |
| Cooling Capacity | 40W |
| Rated Current | 6A |
| Temp Range In Cold Fin | -90°C~0°C |
| Size | OD 86mm x Length 260mm |
| Controller | Drive Board And Display Board Included |
1. What's Stirling engine used for?
-Stirling engines are energy conversion devices used as prime movers, refrigerating, or heat pumps. Currently, they are used commercially as cryogenic cooling systems, deep and fast freezing, and cold chain logistics, and are under development as low-noise, low-emission automotive engines.
2. How cold can RIGID Free Piston Stirling Cooler get?
-Temperature down to -90ºC in a few mins. And with our largest model RS100, the maximum temperature can reach to minus -150ºC.
3. Which gas is used in Stirling Cryocooler?
-Although air is the traditional working fluid for Stirling engines, Hydrogen and Helium are also employed for improved performance due to their better thermal properties.
4. How long can a Stirling Cryocooler run?
-The Cryocooler design life is 5 years, and this is the recommended lifetime, although the current mean time to failure (MTTF) is over 200,000 hours, roughly 23 years.
5. What maintenance Stirling Cryocooler is required?
-The Cryocooler components are enclosed in a welded pressure vessel and there is no way to access them. There is no maintenance required on the cryocooler. We do recommend keeping the air fins free of debris on units that have cooling fins.
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