The cold box, which comprises of several plate-fin heat exchangers (PFHE), is largely utilized in different industries. In this research, the computational fluid dynamics (CFD) technique has been used for investigating the impact of different fluid distributors on the rates of heat and mass transfer, in an industrial complex cold box equipped with plate-fins. While inlet and outlet fluid distributors and channels were taken into account in the computational domain, the porous media technique was applied to the channels as an alternative to the fins in the original cold box. The mass transfer model including the phase change was accounted for by the flash calculations. Local thermal non-equilibrium (LTNE) between the porous medium and fluid flow with a mass transfer was used in the simulations. Three principal side distributors, i.e. diagonals A, B, and C, were used, and their performance was evaluated by CFD. It was found that using each of these types of distributors led to different CFD results in the cold box. The heat transfer rate in the case of the diagonal C was 73% more than that of the diagonal A. The flow uniformity index in the case of the diagonal C was 11.6% greater than that of the diagonal A in the stream C.

由多个板翅式换热器（PFHE）组成的冷箱在不同行业中得到大量利用。在这项研究中，计算流体动力学（CFD）技术已用于研究在装有板翅的工业复杂冷箱中不同流体分配器对热量和质量传递速率的影响。在计算域中考虑了入口和出口流体分配器和通道的同时，将多孔介质技术应用于通道，以替代原始冷箱中的散热片。包括相变的传质模型是通过闪蒸计算来解释的。在模拟中使用了多孔介质和流体之间的局部热不平衡（LTNE），并进行了传质。三个主要侧面分配器，即对角线A，B，使用C和C，通过CFD评估其性能。发现使用每种类型的分配器在冷藏箱中导致不同的CFD结果。对角线C情况下的传热率比对角线A高73％。对角线C情况下的流均匀性指数比流C中对角线A更高。