Firdaus, Muhammad Miftakhul (2025) Perencanaan Struktur Bangunan Breakwater Sebagai Solusi Untuk Penurunan Suhu Bagian Sisi Kanal Intake PLTGU Grati, Pasuruan, Jawa Timur. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Breakwater merupakan suatu struktur pantai yang dirancang untuk melindungi wilayah pesisir dari dampak gelombang laut. Pada Pembangkit Listrik Tenaga Gas dan Uap (PLTGU) Grati, Pasuruan, ditemukan permasalahan berupa peningkatan suhu pada sisi kanal intake, yang berdampak langsung terhadap kinerja sistem pendingin mesin inlet. Peningkatan suhu ini disebabkan oleh terbentuknya siklus arus panas yang berasal dari aliran air buangan (outtake) mesin kondensor. Oleh karena itu, diperlukan analisis dan perencanaan penambahan struktur breakwater di sisi kanal PLTGU sebagai upaya untuk menurunkan suhu air laut yang masuk ke sistem pendingin. Dalam tugas akhir ini, dilakukan pemodelan dan analisis arus serta gelombang laut menggunakan perangkat lunak Delft3D. Pemodelan bertujuan untuk mengetahui pola penyebaran temperatur akibat air buangan panas (thermal plume) dan mengevaluasi pengaruh penambahan struktur breakwater terhadap perubahan pola arus dan suhu. Proses analisis melibatkan simulasi flow modelling dan pemilihan alternatif desain struktur Breakwater berdasarkan hasil pemodelan suhu dan arus. Seluruh analisis dalam studi ini mempertimbangkan variasi musim angin yang terjadi sepanjang tahun, meliputi empat musim utama yang berpengaruh terhadap dinamika arus laut di sekitar lokasi studi. Dalam kerangka analisis tersebut, terdapat 18 alternatif desain yang telah dievaluasi dan dibandingkan berdasarkan efektivitas nya dalam mereduksi suhu, panjang struktur, serta kedalaman pondasi bangunan. Hasil simulasi menunjukkan bahwa alternatif ke-18 merupakan solusi paling optimal, dengan panjang struktur mencapai 554 meter. Alternatif ini berhasil mereduksi suhu maksimum sebesar 4,53% dan suhu rata-rata sebesar 3,10% pada sisi kanal intake. Meskipun nilai reduksi suhu yang dicapai tidak terlalu signifikan, alternatif ini dinilai paling efisien dari segi desain dan implementasi konstruksi ======================================================================================================================================
A breakwater is a coastal structure designed to protect coastal areas from the impact of ocean waves. At the Grati Gas and Steam Power Plant (PLTGU Grati) in Pasuruan, an issue of elevated water temperature in the intake canal has been identified, directly affecting the performance of the cooling system's inlet machinery. This temperature increase is attributed to the formation of a thermal recirculation loop originating from the discharge water (outtake) of the condenser. Therefore, analysis and planning for the addition of breakwater structures at the PLTGU's intake canal are necessary to lower the temperature of seawater entering the cooling system. In this study, ocean current and wave modeling and analysis were conducted using Delft3D software. The modeling aimed to determine the thermal plume dispersion pattern resulting from hot discharge water and to evaluate the effect of adding breakwater structures on changes in current patterns and temperature. The analysis process involved flow modeling simulations and the selection of alternative breakwater designs based on temperature and current modeling results. All analyses considered seasonal wind variations throughout the year, encompassing four main seasons that influence ocean current dynamics around the study site. Within this analytical framework, 18 alternative designs were evaluated and compared based on their effectiveness in temperature reduction, structural length, and foundation depth. Simulation results indicate that the 18th alternative is the most optimal solution, featuring a structural length of 554 meters. This alternative successfully reduced the maximum temperature by 4.53% and the average temperature by 3.10% at the intake canal. Although the achieved temperature reduction value is not overly significant, this alternative is deemed the most efficient in terms of design and construction implementation.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Breakwater, Flow Modelling, Temperature Reduce, Delft3D, PLTGU Grati Pasuruan, Breakwater , Pemodelan Arus , Penurunan Suhu, Delft3D, PLTGU Grati Pasuruan |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) > G70.217 Geospatial data G Geography. Anthropology. Recreation > GC Oceanography > GC161 Ocean temperature T Technology > TC Hydraulic engineering. Ocean engineering > TC203.5 Coastal engineering T Technology > TC Hydraulic engineering. Ocean engineering > TC333 Breakwaters T Technology > TC Hydraulic engineering. Ocean engineering > TC357 Harbor Engineering. Piers, quays, and wharves |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Miftakhul Firdaus |
| Date Deposited: | 28 Jul 2025 03:36 |
| Last Modified: | 28 Jul 2025 03:36 |
| URI: | http://repository.its.ac.id/id/eprint/121953 |
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