| dc.description.abstract | The development of high-capacity power generation systems capable of utilizing
low-temperature heat sources is one of the key priorities in renewable energy
technology. This study aims to analyze and optimize a thermal system that
integrates the biomass pyrolysis process with an Organic Rankine Cycle (ORC),
using Aspen Plus simulation software. Two system configurations are examined:
the Basic ORC and the ORC with a recuperator, along with performance
evaluations of various refrigerants, including R123, R141b, R245fa, R134a, butane,
isobutane, pentane, R601, R1234YF, and R1234ze. The modeling is based on a
thermodynamic approach through energy and exergy analyses to compare the
performance of different configurations and working fluids. The simulation results
show that the application of a recuperator consistently improves thermal efficiency
and expander power output. R1234YF exhibits the best performance, achieving a
thermal efficiency of 14.04% and a maximum expander power of 1.67 kJ/s. The
implementation of a dual-evaporator configuration further enhances the energy
quality of the working fluid and expands the utilization of waste heat, resulting in
superior performance compared to conventional single-stage systems. The
integration of biomass pyrolysis with the Organic Rankine Cycle (ORC), supported
by effective heat recovery and the appropriate selection of refrigerants, holds
significant potential in improving energy conversion efficiency. This study
recommends the development of more sustainable, adaptive, and efficient ORC
systems for low-temperature waste heat recovery applications. | en_US |
