Development of thermal conductive consolidated activated carbon for adsorption refrigeration
Development of thermal conductive consolidated activated carbon for adsorption refrigeration
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DOI：
10.1016/j.carbon.2011.09.061
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发表时间：
2012-03
期刊：
影响因子：
10.9
通讯作者：
Liwei Wang;S. Metcalf;R. E. Critoph;R. Thorpe;Z. Tamainot-Telto
中科院分区：
文献类型：
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作者：
Liwei Wang;S. Metcalf;R. E. Critoph;R. Thorpe;Z. Tamainot-Telto
以硫酸处理膨胀天然石墨为基体，研制了一种新型固结复合活性炭。制备了不同密度、不同粒度、不同配比的AC样品，并对其热物理性能进行了评价。结果表明，固结复合AC的最高有效导热系数和热扩散系数分别为34.2Wm− 1 K − 1和3.89×10− 5 m2 s −1，分别是普通颗粒AC的150倍和72倍。吸附剂的渗透率在1.24×10− 14和7.81×10− 10 m2之间，密度在215和448 kgm −3之间。采用Dubininin-Astakhov（D-A）平衡方程对实验数据进行拟合，评价了复合活性炭和颗粒活性炭的吸附性能。结果表明，ENG-TSA的添加可以通过增大吸附制冷机的浓度摆动来改善吸附制冷机的性能。
A new type consolidated composite activated carbon (AC) was developed with a host matrix of expanded natural graphite treated with sulfuric acid (ENG-TSA). Samples with different density, different grain size of AC, and different proportion of AC were produced and thermo-physical properties were evaluated. Results show that the highest effective thermal conductivity and thermal diffusivity of consolidated composite AC were 34.2Wm−1K−1and 3.89×10−5m2s−1, which were 150 times and 72 times higher, respectively, than ordinary granular AC. The permeability of adsorbents ranged between 1.24×10−14and 7.81×10−10m2while the density ranged between 215 and 448kgm−3. The adsorption performance for composite AC and granular AC were evaluated by fitting experimental data with the equilibrium Dubinin–Astakhov (D–A) equations. Results show that the addition of ENG-TSA can improve the performance of adsorption refrigeration machines by increasing the concentration swing.