TY - JOUR
T1 - Control of fully electrified heat pump assisted distillation process by flash vapor circulation
AU - Cui, Chengtian
AU - Zhang, Xiaodong
AU - Qi, Meng
AU - Kiss, Anton A.
PY - 2025
Y1 - 2025
N2 - 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.
AB - 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.
KW - Flash vapor circulation
KW - Heat pump assisted distillation
KW - Process dynamics and control
KW - Process electrification
UR - http://www.scopus.com/inward/record.url?scp=105011181935&partnerID=8YFLogxK
U2 - 10.1016/j.cherd.2025.07.023
DO - 10.1016/j.cherd.2025.07.023
M3 - Article
AN - SCOPUS:105011181935
SN - 0263-8762
VL - 220
SP - 450
EP - 460
JO - Chemical Engineering Research and Design
JF - Chemical Engineering Research and Design
ER -