Heat exchangers, difficult-to-pass fin arrangements for heat exchangers, and related methods

A heat exchanger may be configured to utilize multiple portions of difficult-to-pass fins that may be configured such that the fins of an upper first portion may establish a liquid head and the fins of a lower second portion may be configured to distribute liquid in a uniform or consistent manner. The fins of the first portion may be arranged with holes of a different type than the fins of the second portion. For example, the diameter or width of the holes of the first portion may be different than the diameter or width of the holes of the second portion. In addition (or as an alternative), the fin frequency and/or the pitch between immediately adjacent holes on the fins of the first portion may be different than the pitch between immediately adjacent holes on the fins of the second portion. 一种热交换器，其可以配置为利用多部分的难通翅片，所述难通翅片可以配置为使得上部第一部分的翅片可以建立液体压头，并且下部第二部分的翅片可以配置为以均匀或一致的方式分配液体。第一部分的翅片可以利用与第二部分的翅片不同类型的孔布置。例如，第一部分的孔的直径或宽度可以不同于第二部分的孔的直径或宽度。此外(或作为替代方案)，翅片频率和/或第一部分的翅片上的紧邻孔之间的间距可以不同于第二部分的翅片上的紧邻孔之间的间距。