氯化锶非平衡吸附动力学模型及其在制冷中的应用

发布时间：2018-06-27 08:43

  本文选题：吸附 + 吸附剂　； 参考：《化工学报》2017年06期

【摘要】：为了研究氯化锶混合吸附剂-氨气工质对的非平衡吸附动力学模型,对混合比例为4:1(氯化锶:膨胀硫化石墨)的氯化锶-膨胀硫化石墨混合吸附剂的吸附与解吸性能进行了测试与研究。发现其非平衡吸附过程是双变量控制过程而不是单变量控制过程。通过对其等压吸附/解吸过程及解吸滞后现象进行进一步分析,建立了氯化锶混合吸附剂的动力学模型。分别用理论、实验及模型数据拟合吸附制冷过程的COP和制冷量,结果表明,所建立的非平衡动力学模型的拟合结果和实际结果吻合得很好。例如在蒸发温度为0℃、环境温度为25℃、热源温度为90.5℃以上时,拟合COP所带来的最大误差只有1.0%,而理论的平衡吸附性能计算所带来的最大误差为25.8%;理论得到的制冷量比实际值偏高188.1%,而拟合值只比实际值偏高2.1%。
[Abstract]:In order to study the non-equilibrium adsorption kinetic model of strontium chloride mixed adsorbent-ammonia working fluid pair, The adsorption and desorption properties of a mixture of strontium chloride and expanded graphite sulphide with a mixture ratio of 4:1 (strontium chloride: expanded graphite sulfide) were tested and studied. It is found that the non-equilibrium adsorption process is a bivariate control process rather than a univariate control process. Based on the analysis of isobaric adsorption / desorption process and desorption hysteresis, a kinetic model of strontium chloride mixed adsorbent was established. The cop and the refrigerating capacity of adsorption refrigeration process were fitted by theoretical, experimental and model data, respectively. The results show that the fitting results of the established non-equilibrium dynamic model are in good agreement with the actual results. For example, when the evaporation temperature is 0 鈩，

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