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

Abstract

The increase in energy consumption worldwide has led to a growing environmental damage potential due to the use of fossil fuels. One solution to address this issue is to transition towards renewable energy, which is more environmentally friendly. One such renewable energy source is biomass, known for its carbon-neutral properties. Biomass pyrolysis using empty oil palm fruit bunches is an example of biomass utilization technology that produces new products such as biochar, syngas, and biooil. The waste heat from syngas, with a temperature of 280°C, can still be further utilized as a heat fluid by integrating the Pyrolysis system with the ORC system for power generation. This research was conducted through Aspen Plus simulation to obtain the condenser design in the ORC system, using various ORC working fluids such as R245fa, R141b, and R123 to assess the effectiveness of the designed condenser. The study also examines the influence of using a recuperator on the designed ORC system. The research results indicate that the ORC condenser has a surface area of 5.21 m2. The condenser effectiveness for Basic ORC system variations is 0.92 for R245fa, 0.64 for R141b, and 0.80 for R123, while the condenser effectiveness for Recuperator ORC system variations is 0.85 for R245fa, 0.07 for R141b, and 0.68 for R123. The use of a recuperator results in an increased efficiency of the ORC system, with an efficiency increase of 1.38% for R245fa, 0.61% for R141b, and 1.45% for R123