4350 微細加工を施した伝熱面における沸騰熱伝達ならびに着霜特性に関する研究(S58 高効率ヒートポンプの要素技術とその応用,S58 高効率ヒートポンプの要素技術とその応用)

概要

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We employed the recent micro-order surface machining technology on the heating surface and produced the artificial micro-ordered groove pattern on the heating surface. The pool boiling heat transfer characteristics and the frost phenomena on the artificial surface with micro-structure are experimentally investigated. The effects of the groove depth or pattern pitch between grooves on the heat transfer promotion and frost characteristics were especially focused. For the boiling experiments, the measurements for the surface temperature and heat flux on the heating surface were carried out by using thermocouples and obtained the boiling curve by changing the surface properties. The direct observations for the bubble nucleation on the heating surface were also carried out by using a digital camera. For the frost phenomena, the direct observations of the frost and melting phenomena on the surface by using the microscope were carried out. It is cleared that the groove pattern pitch strongly affects the diameter of droplets formed after the frost melting.
社団法人日本機械学会の論文
2006-09-15