Analisis Numerik Perpindahan Panas Dan Aliran Udara Pada Sistem Pendingin Plat Zigzag Multi-Fin PEMFC Dengan Variasi Sudut Dan Gap

Adinurcahyo, Pandu (2026) Analisis Numerik Perpindahan Panas Dan Aliran Udara Pada Sistem Pendingin Plat Zigzag Multi-Fin PEMFC Dengan Variasi Sudut Dan Gap. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proton Exchange Membrane Fuel Cell (PEMFC) menghasilkan panas berlebih ketika beroperasi, dan panas ini perlu dikelola agar membran tidak mengalami dehidrasi serta performa sel tidak menurun. Pendinginan udara menjadi pilihan yang menarik karena konstruksinya sederhana dan biayanya murah, meskipun efektivitasnya sangat bergantung pada desain geometri saluran pendingin. Penelitian ini menganalisis pengaruh variasi sudut zigzag (60° dan 120°) serta gap (1 mm dan 1,2 mm) pada pelat pendingin multi-fin PEMFC terhadap distribusi temperatur, pressure drop, velocity magnitude, heat transfer coefficient, thermal resistance, dan efisiensi sistem pendingin, dengan geometri eksisting bersudut 90° sebagai pembanding. Simulasi numerik tiga dimensi dijalankan menggunakan ANSYS Fluent pada lima variasi inlet velocity, yaitu 0,6; 1; 1,6; 2,2; dan 3 m/s. Hasil simulasi menunjukkan bahwa kenaikan inlet velocity meningkatkan pressure drop namun menurunkan outlet temperature pada seluruh geometri, karena waktu kontak antara udara dan permukaan pelat menjadi lebih singkat. Di antara seluruh variasi yang diuji, geometri Zigzag 120° gap 1 mm memberikan performa pendinginan terbaik, dengan outlet temperature 338,84 K, pressure drop 318,55 Pa, heat transfer coefficient 41,80 W/m²K, Q thermal 5,44 W, dan efisiensi sistem pendingin 38,39% pada kecepatan 3 m/s. Konfigurasi ini menghasilkan keseimbangan paling baik antara kemampuan pembuangan panas dan hambatan aliran udara.
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Proton Exchange Membrane Fuel Cells (PEMFCs) generate excess heat during operation, and this heat must be managed to prevent membrane dehydration and performance loss. Air cooling is an attractive option because it is simple and inexpensive to implement, although its effectiveness strongly depends on the geometry of the cooling channel. This study examines the effect of zigzag angle variation (60° and 120°) and gap size (1 mm and 1.2 mm) on a multi-fin PEMFC cooling plate toward temperature distribution, pressure drop, velocity magnitude, heat transfer coefficient, thermal resistance, and cooling efficiency, using the existing 90° geometry as the baseline. Three-dimensional numerical simulations were carried out in ANSYS Fluent at five inlet velocities of 0.6, 1, 1.6, 2.2, and 3 m/s. The results show that increasing the inlet velocity raises the pressure drop but lowers the outlet temperature for every geometry, because the contact time between the air and the plate surface becomes shorter. Among all tested variations, the Zigzag 120° geometry with a 1 mm gap delivers the best cooling performance, reaching an outlet temperature of 338.84 K, a pressure drop of 318.55 Pa, a heat transfer coefficient of 41.80 W/m²K, a Q thermal of 5.44 W, and a cooling efficiency of 38.39% at 3 m/s. This configuration offers the best balance between heat removal capability and flow resistance.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	CFD; Fuel Cell; Multi-fin; PEMFC; Pendinginan Udara Air Cooling; CFD; Fuel Cell; Multi-fin; PEMFC
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting.
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering Technology
Depositing User:	Pandu Adinurcahyo
Date Deposited:	31 Jul 2026 04:18
Last Modified:	31 Jul 2026 04:18
URI:	http://repository.its.ac.id/id/eprint/140426

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