Abstract The matrix material and geometry are both critical in regenerator design at low temperatures. Since the release of REGEN3.2, it is relatively easy to calculate the performance of regenerators at low temperatures. In this effort, the impact of changing the low temperature regenerator matrix geometry to perforated plates will be studied. The starting point was a cryocooler, using a neodymium packed sphere regenerator, whose performance has been reported earlier. The length and diameter of the cold stage regenerator was kept the same, and the geometry was changed. The refrigeration power of the cold stage was then calculated as a function of the perforated plate porosity. For a porosity value of 5% the predicted refrigeration power was more than doubled when compared to the packed sphere baseline. Some parameters, such as the NTU limit, plate spacing, and thermal penetration effect, are not explicitly calculated in REGEN3.2. The effect of these parameters on overall performance will be discussed. In conclusion, the perforated plate regenerator geometry holds promise for an improvement in refrigeration power of at least a factor of two when compared to the packed sphere case.
Predicted Performance of a Low-Temperature Perforated Plate Regenerator
Cryocoolers 12 ; 483-487
2003-01-01
5 pages
Article/Chapter (Book)
Electronic Resource
English
Predicted Performance of a Low-Temperature Perforated Plate Regenerator
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