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<p>This Paper describes the design and development of a 500 CFM energy-efficient refrigeration air dryer customized to the industrial applications, such as VMCs, CNC equipment, automation systems and food packaging operations. The system has two shell-and-tube heat exchangers, one air-to-air precooler and one air-to-refrigerant evaporator. R134a is used as the working fluid to increase thermal efficiency and decrease the required refrigeration. The configuration of the heat exchangers was optimized in a Computational Fluid Dynamics (CFD) analysis, which improved heat transfer and reduced the pressure drop. An elaborate design of the system including an exterior canopy was done to ensure efficient production. The effectiveness of the moisture extraction was consistent and effective at ambient temperatures between 15℃and 30℃, and the inlet air temperature was 52℃. The parameters of the system were set in such a way that an outlet air temperature of approximately 2℃ was always attained and this allowed the system to dry more efficiently. The addition of the precooler lowered the thermal load of the evaporator by approximately 46% and this greatly enhanced the efficiency of energy. The outcomes of CFD showed that the air-side reduced its temperature by 34℃ and the pressure drop by 2.1&#xa0;bar, which were confirmed with the use of experimental data. The results prove the strength of the system and point to the possible improvement of the precooler design and functioning strategy.</p>

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Energy-Efficient Air Drying: CFD-Assisted Design and Experimental Validation of a Refrigeration Dryer with Dual Heat Exchangers

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Abhiraj D. Dhavan,
  • Prakash M. Gadhe,
  • Vaibhav N. Deshmukh,
  • Ashok B. Korane,
  • Director

摘要

This Paper describes the design and development of a 500 CFM energy-efficient refrigeration air dryer customized to the industrial applications, such as VMCs, CNC equipment, automation systems and food packaging operations. The system has two shell-and-tube heat exchangers, one air-to-air precooler and one air-to-refrigerant evaporator. R134a is used as the working fluid to increase thermal efficiency and decrease the required refrigeration. The configuration of the heat exchangers was optimized in a Computational Fluid Dynamics (CFD) analysis, which improved heat transfer and reduced the pressure drop. An elaborate design of the system including an exterior canopy was done to ensure efficient production. The effectiveness of the moisture extraction was consistent and effective at ambient temperatures between 15℃and 30℃, and the inlet air temperature was 52℃. The parameters of the system were set in such a way that an outlet air temperature of approximately 2℃ was always attained and this allowed the system to dry more efficiently. The addition of the precooler lowered the thermal load of the evaporator by approximately 46% and this greatly enhanced the efficiency of energy. The outcomes of CFD showed that the air-side reduced its temperature by 34℃ and the pressure drop by 2.1 bar, which were confirmed with the use of experimental data. The results prove the strength of the system and point to the possible improvement of the precooler design and functioning strategy.