Abstract
The results from an extensive parametric study using the most recent version of the regenerator design software tool, REGEN3.3, are presented. By compiling the results from more than 10,000 applications of REGEN3.3 for three different temperatures (35 K, 60 K and 80 K), a wide range of frequencies (30–300 Hz), and a variety of regenerator length, inverse mass flux, and cold end phase angles, a group of performance maps have been generated that will enable regenerator optimization without having to learn REGEN3.3. Optimum results, defined by maximum COP values, are also provided in the form of a convenient correlation whereby the COP can be calculated directly from chosen values of cold end temperature, frequency, inverse mass flux, length, and cold end phase angle. One of the more interesting results revealed by this study is that the optimum value of COP is very broad. That is, changes by as much as 15% to 20% in the length, inverse mass flux, or cold end phase away from their optimized values degrade the COP by only 2%.
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