Abstract
Industrial facilities consume a substantial portion of global energy, with heating, ventilation, and air conditioning (HVAC) systems accounting for a major share of this consumption. A significant amount of energy supplied to industrial HVAC systems is ultimately rejected as waste heat through exhaust air, condenser units, flue gases, and process-related thermal losses. Recovering and reutilizing this waste heat presents a critical opportunity to enhance overall system efficiency, reduce operational costs, and mitigate environmental impact. This paper presents a comprehensive design and optimization framework for waste heat recovery systems (WHRS) integrated into industrial HVAC applications. The study focuses on identifying viable waste heat sources, selecting appropriate recovery technologies, and optimizing system parameters to maximize energy efficiency. Thermodynamic principles governing heat recovery are analyzed, and various heat exchanger configurations suitable for industrial environments are discussed. Furthermore, system-level optimization strategies incorporating operational constraints, load variability, and energy demand profiles are examined. The proposed approach demonstrates that effective integration of waste heat recovery into HVAC systems can significantly reduce primary energy consumption while maintaining thermal comfort and process requirements. The findings of this study provide valuable insights for industrial engineers, HVAC designers, and energy managers aiming to implement sustainable and energy-efficient HVAC solutions in industrial facilities.