International Journal of Science, Engineering and TechnologyAuthors: Shubham Kumar, Dr. P.N Ahirwar
Abstract: The increasing demand for environmentally sustainable refrigeration and air-conditioning systems has accelerated research on carbon dioxide (CO₂) as a natural refrigerant, particularly in transcritical cycles. Gas coolers play a pivotal role in determining system efficiency, and finned tube configurations have emerged as a promising solution to enhance heat transfer performance while maintaining compactness. This review paper provides a comprehensive analysis of CO₂ finned tube gas coolers, highlighting their design considerations, thermal–hydraulic performance, and optimization techniques. Key factors such as fin geometry, tube arrangement, material selection, and flow distribution are critically examined in relation to heat transfer enhancement and pressure drop characteristics. Studies investigating numerical simulations, experimental measurements, and hybrid modeling approaches are summarized to identify performance trends and governing mechanisms. Furthermore, the influence of operating parameters such as mass flux, inlet temperature, and gas cooler pressure on system efficiency is discussed. The findings underline the importance of finned tube gas coolers in maximizing the potential of CO₂-based systems and provide insights for future research directions in sustainable refrigeration technologies.
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