A non-uniform pressure and transient boundary condition based dynamic modeling of the adsorption process of an adsorption refrigeration tube
A non-uniform pressure and transient boundary condition based dynamic modeling of the adsorption process of an adsorption refrigeration tube
复制标题
DOI：
10.1016/j.apenergy.2010.12.062
复制
发表时间：
2012-02
期刊：
影响因子：
11.2
通讯作者：
Yongling Zhao;E. Hu;A. Blazewicz
中科院分区：
文献类型：
--
作者：
Yongling Zhao;E. Hu;A. Blazewicz
吸附式制冷管（ART）因其无运动部件、结构紧凑、使用低品位热作为热源等优点而受到越来越多的关注。开发了一种新的 ART 设计，其中选择活性炭-甲醇作为制冷或空调用途的工作对。基于ART发生器的典型配置，在非均匀压力假设下建立了动态数学模型，并引入扩散方程的瞬态边界条件。此外，还进行了实验来验证模型。实验数据和数值结果分别与蒸气密度的瞬态和两种流行的简化边界条件在碳床内的温度发展方面进行了比较。对比表明，瞬态边界条件提高了模型的精度，更重要的是它能够反映发生器内部吸附过程主导驱动力的动态转变，即从扩散驱动逐渐转向温度驱动。
The adsorption refrigeration tube (ART) has drawn increasing attention because of its advantages of no moving parts, compact structure and use of low grade heat as the heat source. A new design of ART was developed, in which activated carbon–methanol was selected as the working pair for either refrigeration or air-conditioning purposes. Based on the typical configuration of the generator of the ART, a dynamic mathematical model was developed under the non-uniform pressure assumption and the introduction of a transient boundary condition of diffusion equation. Moreover, experiments were conducted for validating the model. The experimental data and numerical results were compared in terms of temperature development inside the carbon bed, with the transient and two popular simplified boundary conditions of vapor density respectively. The comparison shows that the transient boundary condition improves accuracy of the model and more importantly it is capable of reflecting the dynamic shift of dominant driving forces of the adsorption process inside the generator, i.e. shifting to temperature driving gradually from diffusion driving.