Abstract
This study investigates the dynamics and control of a fully electrified heat pump assisted distillation system based on the flash vapor circulation (FVC) concept. The proposed configuration enables complete electrification without auxiliary steam. Two control structures are developed and evaluated in Aspen Dynamics under ± 20 % disturbances in throughput and composition. The first structure CS1 employs single-end temperature control with fixed reflux ratio and demonstrates satisfactory performance in most cases. However, it shows minor deviations in product purity under large composition changes. To address this, a second structure CS2 incorporates an additional composition controller to adjust the reflux ratio, achieving improved purity regulation and energy flexibility. The results confirm the dynamic feasibility and controllability of FVC-based distillation, supporting its integration in future sustainable and flexible separation systems.
| Original language | English |
|---|---|
| Pages (from-to) | 450-460 |
| Journal | Chemical Engineering Research and Design |
| Volume | 220 |
| DOIs | |
| Publication status | Published - Aug 2025 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work was supported by the National Natural Science Foundation of China (Grant No. 22208154) and Natural Science Foundation of Jiangsu Province (Grant No. BK20220348).