Thermofluid Analysis of Shuttle Loss on Regenerative Cryocoolers
Shuttle loss is one of major losses of regenerative cryocoolers. In order to improve the efficiency of the cryocoolers, we have to estimate the shuttle loss precisely and reduce it. However, it has been difficult to calculate shuttle loss precisely because the hydrodynamic behavior of the working fluid has not been considered in the analyses and the temperature gradient of the working fluid was given as linear. Therefore, using a general purpose thermofluid analysis software STAR-CD1, we made a model in which the hydrodynamic behavior of the working fluid was considered. By using this model we did a thermofluid analysis which calculated the movement of the working fluid and the temperature change. From this, we calculated the shuttle loss. As a result of these calculations, the preciseness of the calculation model was confirmed by comparing with previous analyses. This means that acceptable analysis is possible with general purpose software, and various models. This paper reports on the analysis model and the results.
KeywordsTemperature Gradient Hydrodynamic Behavior Linear Temperature Gradient Acceptable Analysis Fluid Cylinder
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