This paper presents a transient heat and mass transfer model with experimental validation of a finned cylindrical adsorbent bed for performance analysis in chemisorption refrigeration system. The approximate solution for the mathematical model, including transient heat and mass transfer equations in cylindrical coordinates, was obtained by implementing the Crank-Nicholson approach in a finite difference scheme. Geometrical configuration and physical parameters, including bed material thermal properties and TGA-based kinetic modeling for reaction rate estimation, were used as model data inputs to predict thermal bed distribution, heat flows, and coefficient of performance for a refrigeration system. Results from the model were validated with transient data from a chemical sorption refrigeration test bench. Refrigeration system reactor was made of expanded graphite/activated carbon/lithium chloride (AC/EG/LiCl)-adsorbent (NH₃ in solution with a 25% concentration). The model demonstrated excellent agreement and an adequate representation of the physical phenomena, constituting a potential tool for efficiency-enhancing development of adsorption reactors for refrigeration systems.

本文提出了一种瞬态传热传质模型，并通过实验验证了翅片圆柱状吸附床在化学吸附制冷系统中的性能分析。通过在有限差分方案中实施Crank-Nicholson方法，可以获得数学模型的近似解，包括圆柱坐标中的瞬态传热和传质方程。几何构造和物理参数，包括床料的热性能和基于TGA的动力学模型（用于估计反应速率），被用作模型数据输入，以预测制冷系统的热床分布，热流和性能系数。该模型的结果已通过化学吸附制冷测试台的瞬态数据进行了验证。₃在浓度为25％的溶液中）。该模型显示出极好的一致性，并充分体现了物理现象，构成了提高制冷系统吸附反应器效率的潜在工具。