PARELY, RIZKY NANDA (2025) SIMULASI COMPUTATIONAL FLUID DYNAMICS (CFD) PENGARUH WIRE MESH TERHADAP PERPINDAHAN PANAS DAN PENURUNAN TEKANAN PADA DOUBLE PIPE HEAT EXCHANGER. S2 thesis, Universitas Mercu Buana Jakarta.
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Abstract
The efficiency of conventional double pipe heat exchangers (DPHE) is often constrained by low heat transfer coefficients, posing challenges for compact industrial applications. A potential solution is the use of wire mesh inserts, which enhance turbulence and forced convection. This study employed CFD simulations using ANSYS Fluent 2024 R2 on a concentric copper DPHE (length 1240 mm; inner tube 26/34 mm; outer tube 68/76 mm). Water was used as the working fluid in counterflow, with hot water at 70 °C (Re 4000– 16000) in the inner tube and cold water at 31 °C (Re 2000) in the outer tube. Parameters varied were wire mesh angle (30°, 60°, 90°), wire spacing (3, 4, 5 mm), and mesh distance (4, 5, 6 cm), producing nine combinations based on an L9 orthogonal array. Validation was conducted using the Sieder-Tate and Petukhov correlations. Results showed that the best heat transfer occurred at 30°, 3 mm, and 4 cm, with Nusselt numbers of 17.01, 17.79, and 16.99, respectively. For pressure drop, the most favorable configuration was 30°, 5 mm, and 6 cm, with friction factors of 0.56, 1.18, and 1.55. Using min–max normalization, the optimal overall design was identified as 30°, 3 mm, and 4 cm, yielding a 34.55% increase in heat transfer and a 2310.66% rise in friction factor compared to a plain DPHE. Contour visualizations confirmed that wire mesh induced strong turbulence, improving heat transfer while influencing pressure distribution. Keywords : Double Pipe Heat Exchanger, Wire Mesh, CFD, Heat Trasfer, Pressure Drop Efisiensi double pipe heat exchanger (DPHE) konvensional sering kali terbatas oleh rendahnya koefisien perpindahan panas, sehingga menjadi tantangan dalam aplikasi industri berskala kompak. Salah satu solusi potensial adalah penggunaan wire mesh insert yang dapat meningkatkan turbulensi dan konveksi paksa. Penelitian ini dilakukan secara numerik dengan simulasi CFD menggunakan ANSYS Fluent 2024 R2 pada DPHE tembaga konsentris (panjang 1240 mm; pipa dalam 26/34 mm; pipa luar 68/76 mm). Fluida kerja berupa air dengan aliran berlawanan arah, di mana air panas bersuhu masuk 70 °C (Re 4000-16000) dialirkan pada pipa dalam, sedangkan air dingin 31 °C (Re 2000) pada pipa luar. Parameter yang divariasikan meliputi sudut wire mesh (30°, 60°, 90°), jarak antar kawat (3, 4, 5 mm), dan jarak antar wire mesh (4, 5, 6 cm), menghasilkan sembilan kombinasi berdasarkan orthogonal array L9. Validasi dilakukan dengan korelasi Sieder-Tate dan Petukhov. Hasil analisis menunjukkan bahwa perpindahan panas terbaik diperoleh pada konfigurasi sudut 30°, jarak antar kawat 3 mm, dan jarak antar wire mesh 4 cm, dengan nilai bilangan Nusselt masing-masing 17,01; 17,79; dan 16,99. Sementara itu, dari sisi penurunan tekanan, konfigurasi paling efisien adalah sudut 30°, jarak antar kawat 5 mm, dan jarak antar wire mesh 6 cm, dengan nilai friction factor masing-masing 0,56; 1,18; dan 1,55. Berdasarkan metode normalisasi min-max, desain optimal secara keseluruhan ditunjukkan pada kombinasi 30°, 3 mm, dan 4 cm, dengan peningkatan perpindahan panas sebesar 34,55% dan kenaikan friction factor sebesar 2310,66% dibandingkan DPHE polos. Visualisasi kontur suhu dan tekanan mengonfirmasi bahwa penambahan wire mesh menghasilkan turbulensi kuat, yang mempercepat perpindahan panas sekaligus memengaruhi distribusi tekanan. Kata kunci : Double Pipe Heat Exchanger, Wire Mesh, CFD, Perpindahan Panas, Penurunan Tekanan
| Item Type: | Thesis (S2) |
|---|---|
| NIM/NIDN Creators: | 55821110007 |
| Uncontrolled Keywords: | Double Pipe Heat Exchanger, Wire Mesh, CFD, Perpindahan Panas, Penurunan Tekanan |
| Subjects: | 500 Natural Science and Mathematics/Ilmu-ilmu Alam dan Matematika > 530 Physics/Fisika > 536 Heat/Panas > 536.2 Heat Transfer/Transmisi Kalor, Perpindahan Panas 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan > 621.8 Machine Engineering, Machinery/Teknik Mesin |
| Divisions: | Pascasarjana > Magister Teknik Mesin |
| Depositing User: | khalimah |
| Date Deposited: | 29 Oct 2025 08:11 |
| Last Modified: | 29 Oct 2025 08:11 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/99941 |
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