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<p>The efficient recovery and utilization of low-grade thermal energy remain critical challenges in aircraft electronic cooling systems. In this work, a concentric tube heat exchanger integrated using fin-assisted heat pipe is experimentally evaluated to enhance thermal performance and energy recovery capability. Copper heat pipes charged with Methanol, Ethanol and Acetone are employed to intensify heat transfer among the hot and cold fluid by promoting rapid phase-change heat transport. Experiments are carried out on fluid inlet temperatures and mass flow rates from 30 to 50&#xa0;°C and 0.0126 to 0.0252&#xa0;kg/s, respectively, while the condenser section is maintained at 10&#xa0;°C. The system performance is assessed in terms of Heat transfer rate, Heat transfer coefficient, Reynolds number, and Effectiveness. The results demonstrate that at 0.0252&#xa0;kg/s for 35&#xa0;°C the acetone possess 86.6%, Methanol as 83.5% and Ethanol as 81% this improves thermal performance, with peak effectiveness achieved at optimum operating conditions under laminar flow regimes. The incorporation of finned heat pipes results in improved thermal gradients and uniform heat distribution along the exchanger compared to conventional designs. The experimental findings confirm that the proposed heat pipe assisted heat exchanger makes viable and energy-efficient system for electronic cooling applications, supporting sustainable thermal management and clean energy utilization of SDG 7.</p>

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Performance analysis of a copper finned heat pipe based heat exchanger for aircraft thermal management

  • 期刊论文

  • 发表日期：

    2026年6月20日

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  • Ramkumar P,
  • Mothi Bala S,
  • Thilagapathy G,
  • Chanakyan C,
  • Vivek C M

摘要

The efficient recovery and utilization of low-grade thermal energy remain critical challenges in aircraft electronic cooling systems. In this work, a concentric tube heat exchanger integrated using fin-assisted heat pipe is experimentally evaluated to enhance thermal performance and energy recovery capability. Copper heat pipes charged with Methanol, Ethanol and Acetone are employed to intensify heat transfer among the hot and cold fluid by promoting rapid phase-change heat transport. Experiments are carried out on fluid inlet temperatures and mass flow rates from 30 to 50 °C and 0.0126 to 0.0252 kg/s, respectively, while the condenser section is maintained at 10 °C. The system performance is assessed in terms of Heat transfer rate, Heat transfer coefficient, Reynolds number, and Effectiveness. The results demonstrate that at 0.0252 kg/s for 35 °C the acetone possess 86.6%, Methanol as 83.5% and Ethanol as 81% this improves thermal performance, with peak effectiveness achieved at optimum operating conditions under laminar flow regimes. The incorporation of finned heat pipes results in improved thermal gradients and uniform heat distribution along the exchanger compared to conventional designs. The experimental findings confirm that the proposed heat pipe assisted heat exchanger makes viable and energy-efficient system for electronic cooling applications, supporting sustainable thermal management and clean energy utilization of SDG 7.