G0600-4-1 スターリングエンジンにおける再生熱交換器の流動特性が熱交換に及ぼす影響(熱工学部門一般講演(4):伝熱(4))

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The regenerative heat exchanger is important function for deciding an efficiency of Stirling engines. The pressure loss and the heat transfer process have considerable effects on performance of regenerative heat exchanger. In this paper, we studied on effects of suppressing a side leak on performance of regenerator. The side leak means a working fluid flow passing through an clearance gap between the periphery of the thermal storage matrix and the inside wall of the regenerator. Two types of regenerative heat exchanger were designed. One is a type suppressing the side leak and other is conventional type allowing side leak. Using stainless steel wire sheets with different mesh size, several types thermal storage matrix were made to change porosity. The result shows that the side leak suppressed type has a lower pressure loss and higher thermal regeneration rate, compared with conventional type.
2010-09-04