Advanced Regenerators for Very Low Temperature Cryocoolers.
Final rept. Apr-Nov 93,
GENERAL PNEUMATICS CORP SCOTTSDALE AZ WESTERN RESEARCH CENTER
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This SBlR project is Phase I in the development of a new form of high effectiveness regenerators which are critically needed to develop efficient, long-life cryocoolers for producing temperatures to below 10 K. Regenerator ineffectiveness can overwhelmingly increase required drive power and impose limits on highest operating speed and lowest refrigeration temperature. Due to the fundamental nature of mafter and heat, current regenerators do not allow cryocoolers to operate new 10 K at speeds above 5 to 10 Hz. Increase in regenerator effectiveness would allow increase in operating speed and reductions in machine power consumption, size, and drive loads. Higher operating speed is essential to employing flexure suspension, linear drive systems for prolonged operating life. This Phase I research defines the analytical modeling, thermofluid trade-offs, material properties, production and test methods, and feasibility for developing regenerators for effectiveness and operating speed in 10 K cryocoolers. These results provide the basis for the design, fabrication and testing in phase II of the development. MM
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