1,720,971 research outputs found
Optimising Energy Efficiency in Offshore Buildings: Supporting SDG 7 - Clean and Affordable Energy
Get PDFThe offshore oil and gas sector faces significant challenges in reducing its carbon footprint while meeting global energy demand. Offshore structures consume up to 500 MW of energy per day. Despite the potential for 30-40% energy savings with efficiency technologies, only 25% of global platforms implement integrated energy management systems. This study aims to optimize energy efficiency in offshore structures to support SDG 7 - Affordable and Clean Energy. The study uses a multi-method approach, analyzing data from 10 offshore platforms, conducting energy modeling, and cost-benefit analysis. The results show variability in daily energy consumption (423.7 ± 32.5 MW) with key factors such as hydrocarbon production and environmental conditions. Energy efficiency technologies such as hybrid power generation systems and Integrated Energy Management Systems (SMET) show significant potential for savings. The optimization model shows a total potential energy savings of 37.2 ± 2.1%. Economic analysis using Monte Carlo simulations confirms the feasibility of investment with positive NPV for all evaluated technologies. SMET has the most favorable risk-return profile with a mean NPV of 5.8 ± 0.7 million USD. These findings provide important insights for operators and policymakers, emphasizing the importance of a holistic approach to energy management in offshore structures. Implementation of the proposed energy efficiency strategies can contribute significantly to climate change mitigation and the achievement of SDG 7
Selection Of Profiles In Midship Vessel Structure Operating The Regulations Of The Indonesian Classification Bureau
Get PDFShip construction generally consists of two main parts: the hull and the superstructure or deck house. Several factors must be considered in the construction of a ship. Planning the characteristics of the ship\u27s hull, we are also planning the strength and structure of the ship itself. Midship construction is a construction that must have serious attention in calculating the ship structure. In this section, many forces are acting so that there is a relatively large risk of structural failure. One of the world\u27s classification institutions is BKI, which provides rules for selecting structural profiles. Based on these rules, the load on ship sides is 71,284 KN/m2. Load on the ship bottom is 76,795 KN/m2, Deck Load on Deck Superstructures is 32,581 KN/m2, Load on Cargo Deck is 57,330 KN/m2, Load on Inner Bottom is 68,212 KN/m2, Load on Accommodation Decks is 3,981 KN/ m2
Analysis Of The Installation Of Subsea Pipelines To Support The Need For Clean Water In Supporting Tourism Development On Kayangan Island
Get PDFInclusive access to water is very important for the tourism sector to maintain a good reputation among tourists and the social license of the local community to operate. While all stakeholders or stakeholders expect the success of tourism which contributes to economic improvement, community welfare, human resource development, and improvement of public health and the environment, tourism activities on Kayangan Island need clean water for their development. Considering that the island is one of the favourite tourist destinations and is growing quite rapidly at this time, there is no effective source of clean water available on the island. Therefore, it can be attempted to provide clean water by using subsea pipes sourced from PDAM Makassar. According to observations from various aspects, the pipe will cross the ocean with a span of ±1500 meters by flowing water with a discharge of 10 lt/s using HDPE pipes with a diameter of 140mm PE100, PN 16 according to SNI standards. For a fairly good security system, the jet pump and the pipe will be tied to a 110 mm diameter stainless steel sling bridge. In addition, at every 6 meters distance, the pipe bridge slings are fitted with ballast loads with hanging slings. In this study, the installation of subsea pipelines requires a variety of supporting equipment and also a complicated implementation, but it is can be carried out considering this needs to be done to support the need for clean water on Kayangan Island to support tourism development
Analisis Perawatan Injector Akibat Penyumbatan Bahan Bakar Pada Main Engine Kapal
Get PDFThe auxiliary engine in its operation requires complete combustion to get an effective engine, one of which is to use the injector mechanism. Incomplete combustion can cause the engine to not work optimally, it will even cause damage to theengine so that it requires the cost of repair and replacement of its spare parts. The injector has a way of working by providing high-pressure fuel from the injection pump. The main function of a diesel injector is a device to shrink fuel until it breaks into smooth parts (mist) in high temperatures. The high temperature will have an impact on the engine so that regular maintenance is needed on the engine injector. This research uses data collection methods conducted by library research and document studies. This research includes: finding data of the main engine (injector), analyzing and identifying damage to the injector, repairing, and testing the injector engine.Main engine dalam pengoperasiannya memerlukan pembakaran secara sempurna untuk mendapatkan mesin yang efektif, salah satunya adalah dengan menggunakan mekanisme injector. Pembakaran yang tidak sempurna dapat mengakibatkan mesin tidak dapat bekerja dengan maksimal, bahkan akan menimbulkan kerusakan mesin sehingga membutuhkan biaya perbaikan dan penggantian spare part-nya. Injector memiliki carakerja dengan memberikan bahan bakar bertekanan tinggi dari injection pump. Fungsi utama injektor diesel adalah alat untuk mengabutkan bahan bakar hingga terpecahpecah menjadi bagian yang halus (kabut) dalam suhu tinggi. Suhu tinggi tersebut akan memberikan dampak pada mesin sehingga perlu diadakan perawatan berkala pada injektor mesin. Penelitian ini menggunakan metode pengumpulan data yang dilakukan dengan riset pustaka dan studi dokumen. Penelitian ini meliputi: mencari data mesin induk (injektor), menganalisa dan mengidentifikasi kerusakan injektor, perbaikan dan pengetesan injektor mesin
Analisa Kekuatan Struktur Barge Pada Proses Load Out Offshore Module (Top Side) dengan SPMT
Get PDFOne of the critical processes when fabricating offshore is the process of transferring the offshore module (Top Side) from the top of the jetty to the transportation barge or often called the process Load Out. One of the analyzes needed to ensurethe processing load out runs smoothly and safely is the analysis of the strength of the barge structure when the load out process occurs, which is checking the strength of the barge structure whether it is able to withstand the load topside when there is load transfer from the top of the jetty to transportation barge or from the edge of the barge to the final location. To get accurate results, the help of computer programs is used or often called the finite element method (Finite Element Analysis). The software used in this analysis is Staad Pro V8i with a three-module simulation experiment. From theanalysis it was concluded that the three module simulation simulations have a maximum value of von mises stress is 74.119 N / mm2, normal stress is 57.765 N / mm2, and shear stress is 0.02279 N / mm2, where all stress values are below the maximum limit required by the American Institute of Steel Construction ( AISC) so that the barge structure does not need to be given additional reinforcement both internally and externally because it is still safe and able to withstand the topside when loading. Analysis with SPMT has the potential to be a benchmark in analyzing the strength of the barge structure in the process of loading out the offshore module (top side).Salah satu proses yang kritikal ketika fabrikasi offshore yaitu proses transfer offshore module (Top Side) dari atas jetty ke atas transportation barge atau sering disebut Proses Load Out. Salah satu analisa yang dibutuhkan untuk memastikan proses load out berjalan dengan lancar dan aman yaitu analisa kekuatan struktur barge pada saat proses load out tersebut terjadi yaitu dimana dilakukan pengecekan terhadap kekuatan struktur barge apakah mampu menahan beban top side ketika terjadi transfer beban dari atas jetty ke atas transportation barge atau dari tepi barge sampai ke final lokasi. Untuk mendapatkan hasil yang akurat maka digunakan bantuan program komputer atau sering disebut dengan metode elemen hingga (Finite Element Analysis). Adapun software yang digunakan pada analisa ini yaitu StaadPro V8i dengan simulasi percobaan ada tiga module. Dari hasil analisa diperoleh kesimpulan bahwa simulasi percobaan module tiga memiliki nilai maksimum von misses stress adalah 74,119 N/mm2, normal stress adalah 57,765 N/mm2, dan shear stress adalah 0,02279 N/mm2, dimana semua nilai tegangan tersebut dibawah tegangan izin atau dibawah batas maksimal yang disyaratkan AISC sehingga struktur barge tidak perlu diberikan tambahan penguatan baik internal maupun eksternal karena masih aman dan mampu untuk menahan beban top side ketika load. Analisis dengan SPMT berpotensi menjadi patokan dalam dalam menganalisis kekuatan struktrur barge dalam proses load out offshore module (top side)
Analisis Dampak Penerapan Kebijakan Bonded Warehouse (Gudang Berikat) Terhadap Biaya Logistik Di Pelabuhan
Get PDFA bonded warehouse is a place to store imported goods, which can be accompanied by one or more activities in the form of packaging / repacking, sorting, merging (kitting), packing, adjusting, cutting, for certain goods within a certain period to be reissued. In the Minister of Finance Regulation (PMK) No.155 / PMK.04 / 2019 concerning Bonded Warehouses, the Ministry of Finance emphasizes that this tightening of supervision is carried out in two forms, both in terms of taxation and the mechanism for importing goods. This bonded warehouse policy is expected to reduce national logistics costs by reducing dwelling time at ports and accelerating access to raw material warehouses to industry. The essence of this study is to analyze the extent of the influence obtained by users of bonded warehouse services in terms of logistics costs. Cost comparisons are obtained from surveys with companies that have already utilized bonded warehouse facilities.Gudang Berikat merupakan tempat menimbun barang impor, dapat disertai 1 (satu) atau lebih kegiatan berupa pengemasan/pengemasan kembali, penyortiran, penggabungan (kitting), pengepakan, penyetelan, pemotongan, atas barang-barang tertentu dalam jangka waktu tertentu untuk dikeluarkan kembali. Dalam Peraturan Menteri Keuanga (PMK) No.155/PMK.04/2019 tentang Gudang Berikat, Kementerian Keuangan menekankan bahwa pengetatan pengawasan ini dilakukan dalam dua bentuk baik dari sisi perpajakan maupun mekanisme pemasukan barang. Kebijakan gudang berikat ini diharapkan mengurangi biaya logistik nasional dengan menurunkan dwelling time di pelabuhan dan mempercepat akses gudang bahan baku ke Industri. Inti dari penelitian ini menganalisis sejauh mana pengaruh yang diperoleh oleh pengguna jasa gudang berikat dari sisi biaya logistik. Perbandingan biaya diperoleh dari survei dengan perusahaan yang sudah memanfaatkan fasilitas gudang berikat
ANALISIS PERAWATAN PURIFIER PADA SISTEM BAHAN BAKAR MAIN ENGINE KAPAL
Get PDFBahan bakar HFO (Heavy Fuel Oil) dari hasil pengolahan minyak bumi, terdapat kandungan material yang tidak dibutuhkan dalam proses pembakaran untuk mesin diesel, biasanya di dalam HFO banyak terdapat kandungan air, pasir, dan lumpur. Jika kondisi ini tidak ditangani akan dapat mengakibatkan turunnya kualitas bahan bakar dan diiringi dengan ketidak sempurnaan pembakaran di dalam ruang bakar. Efek dari pembakaran yang tidak sempurna dapat mengakibatkan kerusakan-kerusakan fatal terhadap mesin induk. Kondisi seperti ini dapat membahayakan keselamatan kapal. Disamping itu perusahaan juga akan mengalami kerugian akibat terjadinya kerusakan pada mesin induk yang di akibatkan oleh rendahnya kualitas bahan bakar. Untuk menghindari hal tersebut dan untuk menjamin proses penanganan bahan bakar yang lancar, maka diperlukan sistem perawatan yang terencana dan bekerja secara efektif dan efisien. Masalah yang sering terdapat diseputar perawatan sistem bahan bakar di atas kapal adalah sering didapati Alarm Failure Purification ketika Purifier sedang beroperasi untuk memurnikan bahan bakar, dan juga sering ditemukannya banyak endapan lumpur dan air pada dasar tangki penyimpanan bahan bakar. HFO ( Heavy Fuel Oil ) yang merupakan minyak residu dari hasil pengolahan minyak bumi, bahan bakar ini memiliki viskositas yang tinggi dibandingkan bahan bakar yang lainnya sehingga pengolahannya harus benar-benar diperhatikan
Strength Analysis of Barge Structure on The Load Out Module Offshore Process Using Skidding Method
Get PDFThe analysis of barge structural strength is crucial for ensuring safe and efficient load-out processes, particularly in evaluating the structure\u27s capacity to withstand top-side loads during transfer from jetty to transportation barge. This study employs Finite Element Analysis to assess the barge structural integrity during the load-out process using the skidding method. Results demonstrate that the maximum von misses stress reaches 74.119 N/mm2 with a unity check (UC) of 0.422 < 1, while the maximum normal stress is 57,734 N/mm2 (UC 0.411 < 1), and shear stress remains minimal at 2.123 N/mm2 (UC 0.024 < 1). Peak stress occurs in load case 2, with the skid frame\u27s ground bearing pressure at 6.83 Ton/m2 across an 85.05 m2 barge surface area. The findings validate that the skidding method is a viable approach for analyzing barge structural strength during load-out operations
PERANCANGAN ALAT PENGUKUR ARUS AIR SEDERHANA DARI BAHAN DAUR ULANG
Get PDFPengukuran arus air memiliki banyak jenis metode dengan berbagai jenis alat. Arus air juga dapat diukur denganmetode sederhana yang dapat dirakit sendiri dari bahan-bahan daur ulang, salah satunya dengan alat ukur arusbersistem pencacah putaran. Sistem pencacah putaran pada alat ukur arus ini memiliki prinsip kerja dengan mencacahjumlah putaran propeller yang kemudian dikonversi menjadi kecepatan arus air. Pembacaan nilai kecepatan arus airdapat dilihat secara digital dengan menggunakan LCD anemometer atau alat ukur kecepatan angin yang tidakdigunakan. Propeller dibuat dengan memanfaatkan baling-baling cooling pad untuk laptop yang sudah tidak terpakai.Pengukuran kecepatan arus dengan menggunakan persamaan v = (p x n) / t, dimana v merupakan kecepatan arusdalam m/s, p adalah panjang lintasan, n merupakan jumlah putaran propeller, dan t adalah waktu dalam satuan sekon
Digitalization of Indonesian Offloading Management Systems from FPSO to Shuttle Tanker
Get PDFArtificial Intelligence has experienced significant improvements, including its use in sustainable maritime security. This journal discusses the development of information systems that are interconnected and real time providing reports to all parties who need information. Overall, we find that the potential for oil sabotage is always present in the delivery of tankers from FPSO to shuttle tankers. The concept of integrated FPSO offloading management to tankers implies minimizing the potential loss of cargo. At the same time, the intelligent technology most often used to control maritime security is the Automatic Integrated System.
 
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