Waste heat management is increasingly crucial in contemporary industrial operations, driven by the imperative to enhance energy efficiency and promote environmental sustainability. This research investigates the utilization of waste heat in a plastic plant, focusing on three thermal cycles: Lithium Bromide Absorption (LBA),Ammonia Water Absorption (AWA), and Organic Rankine Cycle (ORC). By using the ASPEN PLUS program, three models corresponding to the three selected thermal cycles were created. The study rigorously evaluates the performance of each cycle in terms of temperature output and Coefficient Of performance (COP)or efficiency. The results reveal that both the LBA and AWA cycles demonstrate promising alignment with the desired temperature output for cooling applications in industrial applications, specifically plastic plants. However, upon thorough analysis of efficiency metrics, the LBA cycle emerges as the leading option. This finding underscores the significant potential of the LBA cycle for effectively managing waste heat in comparable industrial environments. By addressing critical considerations of temperature output and efficiency, the utilization of the LBA cycle offers a comprehensive solution to waste heat management challenges in industrial operations. This research contributes valuable insights to the field and underscores the importance of exploring advanced thermal cycles for sustainable energy utilization. This multidimensional approach underscores the significance of integrating sustainability considerations into waste heat management practices, paving the way for more efficient and environmentally responsible industrial operations. Future research endeavors could further investigate optimization strategies and explore the practical implementation of the LBA cycle in industrial applications, fostering continued advancements in waste heat management practices. Keywords: Waste Heat Utilization, Lithium Bromide Absorption Cycle, Ammonia-Water Absorption Cycle, Organic Rankine Cycle, Energy Efficiency.