Desain Evaporator pada Sistem Pirolisis Terintegrasi Siklus Rankine Organik menggunakan Aspen Plus

Abstract

The demand and supply of energy are increasing with the growing world population, leading to accelerated environmental degradation due to the predominant use of fossil fuels, causing substantial carbon dioxide emissions worldwide. Biomass pyrolysis emerges as an alternative solution for renewable energy. In its application, biomass pyrolysis, such as palm oil empty fruit bunches, is heated to 500°C to produce bioc har, bio oil, and syngas. The syngas temperature generated during the process can be utilized in the organic Rankine cycle (ORC) to generate electricity. The 280°C heat from syngas will be transferred to evaporate the ORC working fluid in the evaporator un it. This study employs simulation using Aspen Plus software to design the evaporator with three ORC working fluid variations: R245fa, R123, and R141b. The evaporator will be designed using R245fa, and its impact on power and efficiency will be assessed. Th e research findings indicate that the evaporator requires a surface area of 9.70 m2, with the highest to lowest power produced by R245fa at 360.32 Watts, R123 at 269.13 Watts, and R141b at 265.09 Watts. The highest to lowest effectiveness values for the ev aporator are achieved using R245fa at 0.94, R141b at 0.83, and R123 at 0.80.