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Russel J. Galanido,Leah Jessica Sebastian,Daniel Owusu Asante,김동선,천남주,조정호 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.4
The hydrogen fuel filling time for hydrogen-powered fuel cell electric vehicles at different initial conditionswas estimated through dynamic simulation by using Aspen Dynamics v.11 with Peng-Robinson as the thermodynamicmodel. The simulation process was divided into three parts, in which the different storage vessels (LP, MP, andHP banks) act as the sole hydrogen source. The SAE J2601 standard was used as the basis for the fueling operation. Forthe fast filling of the car tank with hydrogen gas, a detailed heat transfer modeling suited for the process was elaboratedto correctly predict the in-cylinder temperature throughout the fueling operation. During the dynamic simulation,the station pressure, the state-of-charge %, the car tank temperature, the hydrogen flow rate, the amount ofhydrogen gas accumulated in the car tank, and the high-pressure storage vessels’ conditions were monitored and confirmedaccording to their expected values or limits. It is determined that the fueling times calculated in the dynamicstudy were faster than their corresponding estimated values for all cases, indicating the integrity of the process.
Russel J. Galanido,김동선,조정호 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.5
The separation of methanol-chloroform mixture, a minimum-boiling azeotrope, is performed using pressure- swing distillation process via process simulation. In this study, the steady-state optimization was carried out using PRO/II with PROVISION v.10. The two different column configurations (low-to-high pressure and high-to-low pressure) were compared wherein the positions of the low-pressure column and high-pressure column were operated interchangeably to attain an optimized design. Additionally, different heat-integration configurations (partial heat- and full heat-integration) were applied to lessen the overall utility consumption. It was determined that the low-to-high pressure column configuration provided a more optimized result for all heat-integrated systems as compared to high-tolow pressure column configuration. Application of heat-integration further decreases the cooling water and steam consumption by 38.86% and 35.74%, respectively, for partial heat-integrated system, and by 44.58% and 41.01%, respectively, for full heat-integrated system.