E109 マイクログループ蒸発器の性能予測に関する研究(OS1 マイクロエネルギー変換)

概要

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A micro-grooved evaporator is one of the promising heat transfer devices with high evaporation and heat transfer performances by actualizing an interline region at a contact line in a groove meniscus. To obtain the high heat performance of this evaporator, the inter line region should exist on a heat transfer surface in high density. In this paper, the heat flux of micro-grooved evaporator with parallel grooves for several depths and widths of groove was measured. The measured value for single groove shows around 25% of the results calculated by numerical model. In addition, the optimal pattern of grooves on a micro-grooved evaporator using ethanol as working fluid was proposed. The heat performance of optimal evaporator was calculated using the results of heat flux and capillary-rise length for a single groove. The maximum heat flux of optimally patterned micro-grooved evaporator was calculated as 0.5MW/m^2 at super heat of 6K.
2009-06-28