Dynamic modelling of an activated carbon-methanol adsorption refrigeration tube with considerations of interfacial convection and transient pressure process
Dynamic modelling of an activated carbon-methanol adsorption refrigeration tube with considerations of interfacial convection and transient pressure process
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DOI：
10.1016/j.apenergy.2012.02.050
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发表时间：
2012-07
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：
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作者：
Yongling Zhao;E. Hu;A. Blazewicz
在本研究中，吸附制冷循环的动态模型建立与吸附剂颗粒内的界面对流传热的考虑。在该模型中，一个瞬态压力过程的概念和数学定义的开始，传统上认为等压吸附过程。该模型进行了数值求解和实验验证的吸附剂/吸附质的温度发展，系统的压力变化，和动态吸附/脱附量。在吸附过程开始时的温度跳跃实验确定，并成功地预测在数值模拟中引入的瞬态压力过程。将新引入的瞬变压力过程与传统的定压过程的数值模拟结果进行了比较。结果表明，引入瞬态压力过程可显著提高模型的精度。此外，根据等温加热和冷却过程中温度的异常发展，讨论了一种值得注意的吸附质迁移现象。该模型可用于阀控、长周期ART及其它类似操作过程的系统。
In the present study, a dynamic model of the adsorption refrigeration cycle was established with the consideration of interfacial convective heat transfer within adsorbent particles. In the model, a concept and mathematical definition of a transient pressure process at the beginning of the traditionally considered isobaric adsorption process are introduced. The model was solved numerically and experimentally verified in terms of the adsorbent/adsorbate temperature development, system pressure variation, and dynamic adsorption/desorption amount. A temperature jump at the beginning of the adsorption process was experimentally identified and was successfully predicted in the numerical simulation with the introduction of a transient pressure process. Numerical results simulated with the newly introduced transient pressure process and the traditional constant pressure process were compared. The comparison shows that the introduced transient pressure process can significantly improve the accuracy of the presented model. In addition, a notable adsorbate migration phenomenon was discussed according to the abnormal temperature development in the processes of isosteric heating and cooling. The present model can be used for a valve-controlled and long cycle-time based ART and other systems with similar operating procedures.