Putra, Edwin Krismahendra (2007) Karakteristik Aliran Perpindahan Panas Konveksi Bebas Pada Serpentine Tube Tipe Plat Horizontal Dengan Tube Terbuka. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pada alat penukar panas (serpentine tube) tipe pelat horizontal dengan tube terbuka akan teljadinya aliran udara segar dari lingkungan memasuki saluran horizontal bagian atas maupun bawah. Sehingga akan terjadi perpindahan panas secara konveksi alamiahlbebasdari serpentine tube menuju udara yang terdapat pada saluran udara bagian atas maupun bawah. Pada saluran udara horizontal aka menghasilkan pola aliran C-loop yang diakibatkan dari adanya perbedaan densitas udara pada saluran horizontal karena terjadiperbedaan temperatur pada saluran udara horizontal. Pada penelitian ini akan dikaji secara eksperimen dan numerik tentang pengaruh dari variasi rasio plate spacing (b!H = 0, 15; 0,3; 0,5; 0.55; 0,8 dan 0,85). Selain itu juga memvariasikan beban panasdengan cara mengatur mass flow rate oli (m= 0,014 kg/s; 0,016 kg/; 0,019 kg/s; dan 0,021 kg/s). Studi numerik dengan software FLUENT bertujuan untuk memperoleh karakteristik aliran dan laju perpindahan panas pada plat bagian atas maupun bawah. Penelitian ini digunakantemperatur oli masuk yang tetap dijaga konstan sebesar 70° C. Dengan memvariasikan rasio plate spacing dan beban panas yang semakin diperbesar maka didapatkan laju perpindahan panas aktual ( q0u) dan numerik ( q101 numerik) yang paling optimal pada posisi b/H= 0,5. Fraksi panas plat atas mempunyai nilai semakin besar dan fraksi panas plat bawah mempunyai nilai semakin kecil ketika plate space ratio semakin diperbesar. Apabila laju alir massa oli semakin diperbesar maka qaktuaJ, qtot numerik, qp.atas, qp.bawah> serta fraksi panas juga semakin tinggi
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In a horizontal plate type heat exchanger (serpentine tube) with an open tube, fresh air from the environment will flow into the upper and lower horizontal channels. So that there will be free natural convection heat transfer from the serpentine tube to the air contained in the upper and lower air channels. In the horizontal air channel, a C-loop flow pattern will be produced which is caused by differences in air density in the horizontal channel due to temperature differences in the horizontal air channel. In this study, the effect of variations in the plate spacing ratio (b!H = 0.15; 0.3; 0.5; 0.55; 0.8 and 0.85) will be studied experimentally and numerically. In addition, the heat load will be varied by adjusting the oil mass flow rate (m = 0.014 kg / s; 0.016 kg /; 0.019 kg / s; and 0.021 kg / s) will be obtained. Numerical studies using FLUENT software aim to obtain the flow characteristics and heat transfer rates on the upper and lower plates. This study used an inlet oil temperature that was kept constant at 70°C. By varying the plate spacing ratio and increasing the heat load, the most optimal actual (q0u) and numerical (q101 numerical) heat transfer rates were obtained at the position b/H = 0.5. The upper plate heat fraction had a larger value and the lower plate heat fraction had a smaller value when the plate space ratio was increased. If the oil mass flow rate is increased, qaktuaJ, numeric qtot, qp.up, qp.bottom> and heat fraction will also be higher
Item Type: | Thesis (Other) |
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Additional Information: | RSM 620.106 4 Put k-1 2007 (weeding) |
Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ254.7 Combustion chambers T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers |
Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
Depositing User: | EKO BUDI RAHARJO |
Date Deposited: | 09 Oct 2025 05:40 |
Last Modified: | 09 Oct 2025 05:43 |
URI: | http://repository.its.ac.id/id/eprint/128535 |
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