Volume 53

A thermodynamic analysis of the staged adsorption/desorption with Type-V isotherms Zhengrong Li, Ruiyang Tao

Abstract

The staged adsorption/desorption employing adsorbent-adsorbate pairs with “S” shaped isotherms is a promising new concept for achieving efficient and effective mass transfer. This study carried out a thermodynamic analysis, demonstrating the superior regeneration efficiency of the ideal staged wheels compared to the traditional single-stage. Further, three engineering guidelines for the layout design of staged adsorbents along the channel were proposed. Under six classic conditions, the corresponding desiccant wheels with optimized stage configuration exhibited 10~20 ℃ lower necessary regeneration temperature (Treg) than single-stage wheels.

Keywords Desiccant wheels, Adsorption isotherms, Adsorbents, Staged adsorption/desorption, Low-grade energy utilization