A comparison of three adsorption equations and sensitivity study of parameter uncertainty effects on adsorption refrigeration thermal performance estimation
A comparison of three adsorption equations and sensitivity study of parameter uncertainty effects on adsorption refrigeration thermal performance estimation
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DOI：
10.1007/s00231-011-0875-8
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发表时间：
2012-02
影响因子：
2.2
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
采用等容吸附法对三种活性炭样品进行了甲醇吸附平衡实验。实验数据分别用Langmuir方程、Freundlich方程和Dubininin-Astakov（D-A）方程拟合。拟合的吸附方程进行了比较，与实验数据的协议。此外，还分析了吸附式制冷系统性能系数和制冷量计算中方程格式的影响。此外，还研究了各吸附方程中各参数对循环COP和制冷量估算的敏感性。结果表明，D-A方程是描述碳-甲醇工质对吸附性能的最佳形式。由于D-A方程的模拟结果对实验确定的D-A方程参数的误差不太敏感，因此推荐使用D-A方程来估算吸附式制冷系统的热力性能。
This paper presents isosteric-based adsorption equilibrium tests of three activated carbon samples with methanol as an adsorbate. Experimental data was fitted into Langmuir equation, Freundlich equation and Dubinin-Astakov (D–A) equation, respectively. The fitted adsorption equations were compared in terms of agreement with experimental data. Moreover, equation format’s impacts on calculation of the coefficient of performance (COP) and refrigeration capacity of an adsorption refrigeration system was analyzed. In addition, the sensitivity of each parameter in each adsorption equation format to the estimation of cycle’s COP and refrigeration capacity was investigated. It was found that the D–A equation is the best form for presenting the adsorptive property of a carbon-methanol working pair. The D–A equation is recommended for estimating thermal performance of an adsorption refrigeration system because simulation results obtained using the D–A equation are less sensitive to errors of experimentally determined D–A equation’s parameters.