Diastianto, Rizky Akbar (2025) Design High Pressure Feedwater Heater (Beban 315MW) Berbasis Analisa Termodinamika Dan Perpindahan Panas Serta Menggunakan Software HTRI Xchanger Dengan Variasi Kecepatan Aliran Feedwater, Ketebalan Tube, Dan Baffle Spacing. Other thesis, Institut Teknlogi Sepuluh Nopember.
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Abstract
High Pressure Feedwater Heater (HPH) merupakan komponen penting dalam sistem Pembangkit Listrik Tenaga Uap (PLTU) yang berfungsi untuk meningkatkan efisiensi termal dengan memanaskan air umpan sebelum memasuki boiler. Pemanasan awal ini mengurangi beban kerja boiler dan konsumsi energi secara keseluruhan. Namun, kinerja HPH dapat menurun akibat berbagai permasalahan operasional, seperti kebocoran pipa (tube leakage) yang disebabkan oleh tekanan dan suhu tinggi, serta korosi internal akibat laju aliran fluida yang berlebihan atau kualitas air yang buruk. Penelitian ini bertujuan untuk merancang ulang HPH dengan pendekatan analisis perpindahan panas untuk meningkatkan efisiensi dan keandalan sistem. Analisis dilakukan terhadap tiga zona utama HPH, yaitu Desuperheating, Condensing, dan Subcooling. Studi ini mencakup tiga variasi desain: ketebalan pipa, kecepatan aliran fluida dalam pipa, dan jarak antar baffle (baffle spacing). Setiap variasi dianalisis untuk menentukan pengaruhnya terhadap penurunan tekanan (pressure drop) dan koefisien perpindahan panas konvektif. Hasil analisis akan digunakan sebagai dasar dalam memilih desain optimal yang menghasilkan kombinasi terbaik antara efisiensi perpindahan panas dan minimisasi kerugian tekanan. Lalu hasil perhitungan akan dibandingkan dengan hasil simulasi dari software HTRI Exchanger. Hasil perhitungan menunjukkan variasi yang paling optimal adalah thickness 1,651 mm, baffle spacing 0,6 x diameter inner shell (D_i), serta kecepatan aliran feedwater 1,9 m/s. Dimana besar pressure drop sisi tube (∆P Tube) sebesar 67641,35867 Pa sementara pressure drop sisi shell (∆P Shell) sebesar 62011,53769 Pa dengan nilai overall heat transfer coefficient (U) sebesar 2966,730341 W/m2.K. Sementara menurut hasil simulasi HTRI, variasi yang paling optimal adalah thickness 2,108 mm, baffle spacing 0,4 x diameter inner shell (D_i), serta kecepatan aliran feedwater 1,8 m/s. Dimana besar pressure drop sisi tube (∆P Tube) sebesar 38248 Pa sementara pressure drop sisi shell (∆P Shell) sebesar 33632 Pa dengan nilai overall heat transfer coefficient (U) sebesar 3925 W/m2.K
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The High-Pressure Feed-water Heater (HPH) is a critical component in coal-fired power plant systems, preheating feed-water before it enters the boiler. This preheating process reduces the thermal load on the boiler, thereby enhancing the overall thermal efficiency of the power plant. However, the performance of HPH units can degrade due to operational issues such as tube leakage, often caused by excessive pressure and temperature, and internal corrosion, which may result from high fluid velocities or poor water quality. This study aims to redesign the HPH using a heat transfer analysis approach to improve both efficiency and operational reliability. The analysis focuses on three principal zones of the HPH: de-superheating, condensing, and sub-cooling. Three design variations are evaluated: thickness tube, fluid velocity inside the tubes, and baffle spacing. Each variation is analyzed to determine its impact on pressure drop and convective heat transfer coefficient. The optimal design will be selected based on the best combination of minimal pressure drop and maximum heat transfer performance. After that, the result from calculation will be compared with simulation result from HTRI Exchanger software. The calculation results indicate that the most optimal variation consists of a tube thickness of 1.651 mm, baffle spacing of 0.6 times the inner shell diameter (Di), and a feedwater flow velocity of 1.9 m/s. In this case, the pressure drop on the tube side (∆P Tube) is 67,641.36 Pa, while the pressure drop on the shell side (∆P Shell) is 62,011.54 Pa, with an overall heat transfer coefficient (U) of 2,966.73 W/m²·K. Meanwhile, according to the HTRI simulation results, the most optimal variation includes a tube thickness of 2,108 mm, baffle spacing of 0.4 times the inner shell diameter (Di), and a feedwater flow velocity of 1,8 m/s. In this case, the pressure drop on the tube side (∆P Tube) is 38248 Pa, while the pressure drop on the shell side (∆P Shell) is 33632 Pa, with an overall heat transfer coefficient (U) of 3925 W/m²·K.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Design High Pressure Feedwater Heater, Perpindahan panas, Kerugian Tekanan, Koefisien Konveksi, HTRI, Design High Pressure Feedwater Heater, Heat Transfer, Pressure drop, Convection Coefficient, HTRI |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Unnamed user with email 5007211133@student.its.ac.id |
| Date Deposited: | 04 Aug 2025 05:49 |
| Last Modified: | 04 Aug 2025 05:49 |
| URI: | http://repository.its.ac.id/id/eprint/125888 |
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