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Efficient defrosting of an inclined flat surface

机译:倾斜平面的有效除霜

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We present a deicing simulation for a practical three-dimensional geometry inside which hot air jets impinge upon a flat inclined glass surface with a layer of ice on the outside. The main goal is to study the unsteady two-phase melting process over the inclined flat surface, and to identify the traditional control parameters such as jet impingement angles for minimization of the defrosting time for given ice and glass thicknesses. A correlation for defrosting as functions of time, heat transfer parameters and impingement angles has been found. Also, in this study, the first Joule heating defroster using transparent electrodes are proposed and numerically simulated as a viable alternative. A correlation between the electrical Joule power requirement and the defrosting time is given. It is demonstrated that substantial improvements (roughly 70% reduction) in defrosting time may be achieved using Joule heating compared to the traditional jet impingement HVAC technology.
机译:我们为实际的三维几何形状提供了除冰模拟,在该模拟中,热空气射流撞击在平坦的倾斜玻璃表面上,外部有一层冰。主要目标是研究倾斜平面上的非稳态两相融化过程,并确定传统的控制参数,例如射流冲击角,以在给定的冰和玻璃厚度下最大程度地缩短除霜时间。已经发现除霜与时间,传热参数和撞击角度有关。同样,在这项研究中,提出了第一台使用透明电极的焦耳加热除霜器,并对其进行了数值模拟,作为可行的替代方案。给出了电焦耳功率要求和除霜时间之间的相关性。事实证明,与传统的射流冲击式HVAC技术相比,使用焦耳加热可以极大地改善除霜时间(减少约70%)。

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