Vertical PCM enclosures are widely used in different applications. The weak heat conduction in these systems is their main deficiency. In present work, the “L” shaped fin was utilized instead of ordinary double rectangular fins. 10 different cases were considered which included two typical arrangements. First arrangement, included the fins placed at the lower side of the enclosure and the second arrangement was for the fins placed at the upper side of the enclosure. Furthermore, dimensions of vertical part (L_V) and horizontal (L_H) were considered as the varying parameters. The left vertical wall was heated and has constant temperature of 343 K. Luaric acid was used as PCM material. The results indicated that the orientation and dimensions of the “L” shaped fins have significant effect on the melting performance, energy storage and exergy of the enclosure. It was found that the application of upward L shaped fin is better than the upward form in the melting process of a vertical enclosure. The best case was related to fin mounted at the lower side of the enclosure which had L_H and L_V of 40 and 20 mm, presenting about 45% enhancement in the melting time.

立式 PCM 外壳广泛用于不同的应用。这些系统中的弱热传导是它们的主要缺陷。在目前的工作中，使用“L”形翅片代替普通的双矩形翅片。考虑了 10 种不同的情况，其中包括两种典型的安排。第一种布置，包括放置在外壳下侧的散热片，第二种布置用于放置在外壳上侧的散热片。此外，垂直部分 (L _V ) 和水平 (L _H) 被认为是变化的参数。左侧垂直壁被加热并具有 343 K 的恒定温度。使用月桂酸作为 PCM 材料。结果表明，“L”形翅片的方向和尺寸对外壳的熔化性能、储能和火用有显着影响。发现在立式围护结构的熔化过程中，采用向上的L形翅片比向上的翅片形式更好。最好的情况与安装在外壳下侧的翅片有关，其 L _H和 L _{V 分别}为 40 和 20 毫米，熔化时间增加了约 45%。