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CSME 2025/10
Volume 46 No.5
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549-559
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Evaluation of Compressed Air Adsorption Dryer with Internal heating Regeneration, External Heating Regeneration, and Compressed Air Heating Regeneration Modes
Suresh Kannan. V a, Somasundaram. P , Lenin. V.R b and Vijayan. S c
aAssistant Professor, Department of Mechanical Engineering, Kangeyam Institute of Technology, Tirupur 638108, Tamil Nadu, India
bAssociate Professor, Department of Mechanical Engineering, Anil Neerukonda Institute of Technology & Sciences, Sangivalasa, Visakhapatnam 531162, Andhra Pradesh, India
cAssociate Professor, Department of Mechanical Engineering, Coimbatore Institute of Engineering and Technology, Coimbatore 641109, Tamil Nadu, India
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Abstract:
In many engineering applications, compressed air without any moisture is critical. Heat regeneration-based adsorption dryers are commonly used to achieve ultra-low dew points in compressed air. This study experimentally examines the essential characteristics of three heat regeneration modes: internal heating, external heating, and compressor air heating. The calculations for the adsorption dryers are based on previous work, forming the foundation for a logical system comparison. The assessment is conducted over a common performance range, including a compressed air output of 1000 to 5000 m³/hr, operating pressures of 5 to 10 bar, and feed air temperatures of 25 to 45°C. The results show that the characteristic specific energy requirements for internal heating, external heating, and compressor air heating are 0.176, 0.342, and 0 kW/m³/min, respectively, for electrical energy. For dried regeneration air, the energy requirements are 0.203, 0, and 0 kW/m³/min, respectively. The study concludes that, for a 3000 m³/hr flow rate at 35°C feed air temperature and 8 bar pressure, energy and capital costs are similar across all three modes, enabling practical system comparison for varying performance ranges.
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Keywords: compressed air; moisture removal; adsorption dryer; heat regeneration, performance evaluation
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©
2025
CSME , ISSN 0257-9731
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