Direct Air Cooling of Pipe-Type Transmission Cable for Ampacity Enhancement: Simulations and Experiments

Dong-Kyu Kim, Yeon-Woog Kang, Hye-Rin Jo, Jin Geon Kim and Minwoo Lee ()
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Dong-Kyu Kim: Korea Electric Power Corporation (KEPCO) Research Institute, 105 Munjiro, Yuseong, Daejeon 34056, Republic of Korea
Yeon-Woog Kang: Korea Electric Power Corporation (KEPCO) Research Institute, 105 Munjiro, Yuseong, Daejeon 34056, Republic of Korea
Hye-Rin Jo: Korea Electric Power Corporation (KEPCO) Research Institute, 105 Munjiro, Yuseong, Daejeon 34056, Republic of Korea
Jin Geon Kim: Department of Mechanical Engineering, Hanbat National University, 125 Dongseodaero, Yuseong, Daejeon 34158, Republic of Korea
Minwoo Lee: Department of Mechanical Engineering, Hanbat National University, 125 Dongseodaero, Yuseong, Daejeon 34158, Republic of Korea

Energies, 2024, vol. 17, issue 2, 1-13

Abstract: Amid the growing demand for energy supply in modern cities, the enhancement of transmission capacity is receiving considerable attention. In this study, we propose a novel method of direct forced cooling in pipe-type transmission lines via an external air supply for reducing the cable temperature and enhancing the ampacity. We conducted numerical simulations using computationally efficient two-dimensional models and a reduced-length three-dimensional model for assessing the cooling efficiency, the distance required for temperature convergence, and the fan/pump capacity required for forced air cooling. We found a 26% increase in ampacity in the case of 5 m/s inlet air velocity into the pipe conduit. We also built and tested the experimental setup equipped with a 300 m length model transmission cable. Results of the forced air cooling experiments show good agreement with numerical simulations. To the best of our knowledge, this study demonstrates the first analysis and validation of direct cooling in pipe-type cables, presenting a promising path for efficient power management in modern metropolitan areas.

Keywords: transmission cable; ampacity enhancement; thermo-fluid analysis; forced cooling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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