Dynamic optimization of adsorptive chillers: Compact layer vs. bed of loose grains

作者：Girnik I S; Grekova A D; Gordeeva L G; Aristov Yu I^*

来源：Applied Thermal Engineering, 2017, 125: 823-829.

DOI：10.1016/j.applthermaleng.2017.06.141

• Adsorption dynamics
• Adsorptive chillers
• Activated carbon
• Methanol
• Binder
• Heat transfer enhancement

This paper addresses the dynamic study on methanol ad-/desorption in compact adsorbent layers, performed by a Volumetric Large Temperature Jump (V-LTJ) method, appropriate for dynamic examination of adsorptive chillers. The commercial active carbon ACM -35.4 was used as an adsorbent, and polyvinyl alcohol as a binder. The influence of the carbon grain size and the layer thickness on the V-LTJ dynamics was studied at a fixed binder content of 12 wt%. To single out the effect of consolidation, a detailed comparison was made with reference beds of the loose carbon grains, having the same configuration, however, containing no binder.
The following findings are reported for the compact layers: (i) near-exponential shape of the dynamic curves of methanol adsorption; (ii) invariance of the dynamics with respect to the ratio (S/m)= <heat transfer surface>/; (iii) linear relationship between the maximal specific power and this ratio. For the compact layers, the process becomes faster by a factor of 1.5-3.5 as compared to the reference beds.

• 出版日期2017-10