在吸收式冷凍空調系統中，吸收器對系統的尺寸、價格及整體的效能有決定性的影響。在吸收器的設計中，會盡量使吸收劑以液膜的型態與水蒸汽接觸，以便提高其吸收率，因此液膜動力學及其相關的熱質傳現象是目前非常重要的研究主題之一。，眾所皆知的是波動液膜相較於平滑液膜具有更佳的熱質傳遞率。本研究針對一溴化鋰吸收式冷凍系統設計平板型吸收器，並在溴化鋰溶液入口處以人為擾動的方式使其在吸收器表面形成波動液膜，探討擾動頻率及強度對表面波及吸收率的影響。

In absorption refrigeration systems, the absorber is a critical component which affects prominently the size, price, and overall performance of the system. In order to reach a high absorption rate, the absorber is generally designed in a way so that the absorbent contacts the water vapor in a falling film mode. Consequently, the liquid-film hydrodynamics and the related heat and mass transfer phenomena are currently the most important research subjects of the absorber. It is well known that wavy films have better heat and mass transfer rates than smooth laminar films. The objectives of the present study are to design a simple flat-plate absorber for an aqueous lithium bromide absorption system and to trigger surface waves on the absorber by manually-controlled excitation. Effects of excitation frequency and amplitude on the surface waves and absorption rate are investigated experimentally.

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