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Pengaruh Perubahan Vakum dan Temperatur Pemanas Fresh Water Generator terhadap Produksi Air Tawar di MT. PM REGENT Susanto, Susanto; Khaeroman; Yulius Oscar; Ngatmin, Ngatmin; Heri Kiswanto
Saintara : Jurnal Ilmiah Ilmu-Ilmu Maritim Vol 8 No 2 (2024): SAINTARA (September 2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Akademi Maritim Nusantara Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52475/saintara.v8i2.343

Fresh onboard water is required to fulfill the crew's living needs and support the ship's operations. The need for fresh water for the crew and operational support of the boat is fulfilled with fresh water purchased from the land. Water purchases can be made when the ship is in port, either when the ship is at the dock or when the boat is anchored. Additional fresh water supply can be obtained continuously while the ship is sailing. Seawater desalination is a solution to produce fresh water to fulfill the new water needs. Desalination using a freshwater generator (FWG) involves evaporation and condensation processes affected by vacuum and operating temperature. This study was conducted to determine the effect of changes in pressure and temperature parameters on the production capacity of the freshwater generator. The study was conducted using a case study method through observation, and experimentation on board MT.PM REGENT. The vacuum in the FWG chamber was varied based on the suction of the vacuum ejector. Hot water temperature as a heater in the evaporator is taken from the cooling jacket of the main engine. The result of the pump ejector pressure variation greatly affects the vacuum level of the distillation chamber At pump ejector pressures between 8 – 16 Bar, the vacuum rate can reach 99 – 100% after the pump is operated At pressures of 2 and 4 Bar, the vacuum level drops dramatically, reaching only 50 and 80 %, respectively. The lowest production of FWG when operated with 80% vacuum with a heating temperature of 75 OC is 2767 liters/day. In FWG operation with a maximum vacuum of 100% and a heating temperature of 85 OC, it is able to produce the most fresh water around 6879 liters/day. Based on the changes in parameters, it can be concluded that a decrease in the level of vacuum and heater temperature reduces the production of fresh water from the Fresh Water Generator.

Mendidik Berwirausaha Warga Beji Ungaran Timur Melalui Pelatihan Las Listrik Suharso, Arif Rakhman; Khaeroman; Putranto, Wahyu Ari; Susanto; Hendartono, Ario; Jaya, Agil Putra; Bustama, Akhirul Andra
ALMUJTAMAE: Jurnal Pengabdian Masyarakat Vol. 3 No. 3 (2023): Desember
Publisher : Universitas Djuanda Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/almujtamae.v3i3.8800

Kegiatan program pengabdian dilaksanakan di sekitar wilayah Ungaran sesuai dengan arahan dan instruksi dari pimpinan Politeknik Maritim Negeri Indonesia dikarenakan adanya pembangunan kampus baru Polimarin di wilayah Ngobo Kecamatan Ungaran Timur dengan mengembangkan potensi yang ada di sekitar wilayah desa Beji Kecamatan Ungaran Timur. Pengetahuan tentang las listrik / SMAW (Shielded Metal Arc Welding) yaitu suatu proses pengelasan busur listrik perlu dikembangkan agar dapat memberikan bekal masyarakat sekitar kampus baru yaitu keterampilan mengelas agar nantinya bisa digunakan untuk mencari pekerjaan dan dapat digunakan untuk membuka lapangan kerja di masyarakat. Metode yang digunakan dalam pengabdian ini adalah memberikan materi secara teori mengenai cara pemakaian las jenis SMAW dan peralatan safety yang harus digunakan, tanya jawab dan praktik membuat dudukan pot. Hasil Produk dari kegiatan pengabdian ini adalah tempat untuk meletakkan pot atau dudukan pot. Kegiatan Pengabdian kepada masyarakat pengelasan ini didampingi dan dibimbimbing oleh Dosen Prodi Teknika yang mengarahkan peserta mulai dari pemasangan kawat las, setting ampere dan mempraktekan membuat dudukan pot.

Pengaruh Quenching Terhadap Sifat Mekanik dan Struktur Mikro Baut Connecting Rod Bekas Untuk Alat Gesek FSW Ari Putranto, Wahyu; Khaeroman; Susanto; Herdawan, Deri; Noviarianto
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2531

One method of joining soft metals such as aluminum that is widely used is Friction Stir Welding (FSW). The friction tool is a very important part of FSW. Friction tools are usually made from hardened H13 steel. This research aims to make a friction tool from steel connecting rod bolts used in marine diesel engines. The experimental methods used include FSW tool design, heat treatment of the material at a temperature of 900oC followed by a quenching process with water and salt water cooling media, then continued with material testing (chemical composition test, hardness test, and micrographic test). The test results obtained from the chemical composition test show that the connecting rod bolts include AISI 4145 steel material. The highest hardness value obtained from the connecting rod steel in the saltwater quenching process was 52.67 HRC with a martensite phase, as seen from the micrographic test. Used steel connecting rod bolts from marine diesel engines can be used as FSW friction tool material.

Rancang Bangun Prototype Sistem Tangki Hydrophore Kapal Niaga sebagai Alat Praktikum Mata Kuliah Permesinan Bantu Khaeroman; Susanto; Wantoro, Widar Bayu
Saintara: Jurnal Ilmiah Ilmu-Ilmu Maritim Vol 9 No 1 (2025): SAINTARA (Maret 2025)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Akademi Maritim Nusantara Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52475/saintara.v9i1.369

Fresh water on the ship must flow from the lowest compartment in the engine room to the top of the platform. The pressure tank, or hydrophore, is a freshwater distribution system widely used in multi-storey buildings, including ships. Hydrophores are used in multi-storey building construction, including on ships, only as temporary holding tanks. The system acts to raise water from storage tanks or wells that are located lower. These systems need to be operated and maintained by competent people. The competence of competent crew members will be able to overcome the problems that occur. Issues that arise in the hydrophore system are very diverse. However, one thing that impacts a hydrophore system disruption is that the supply of fresh water to the entire ship is disrupted or does not flow. The purpose of this study is to design a hydrophore system so that it becomes a prototype that can be used for learning. When the hydrophore prototype has become a practical medium, it can be used as an engineering tool to study many phenomena. The results of the study can be concluded that when water flows through 1 pipe alternately, the pressure difference with the tank is about 0.1 - 0.2 bar. When water is flowed through 2 pipes, the pressure difference with the tank is about 0.2 - 0.4 bar. There is a pressure differential of roughly 0.2 to 0.5 bar when three flow pipes are opened at the same time.

Pengaruh Praktik Manajemen Sumber Daya Manusia terhadap Kinerja Keselamatan Pelayaran melalui Manajemen Perawatan Mesin Kapal Tug Boat (Survei pada Perusahaan Pelayaran di Semarang 2024) Khaeroman; Suprapti, Fitri; Anggoro, Retno; Winarni, Endra
Saintara: Jurnal Ilmiah Ilmu-Ilmu Maritim Vol 9 No 1 (2025): SAINTARA (Maret 2025)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Akademi Maritim Nusantara Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52475/saintara.v9i1.384

This study aims to analyze the effect of human resource management practices on shipping safety performance with ship engine maintenance management as a mediating variable. Independent variables include Selection and Recruitment, Training and Development, Reward Management, and Teamwork Management. The study used a quantitative method with a sample of 92 respondents. The results showed that all independent variables had a positive and significant effect on shipping safety performance. Selection and Recruitment (t = 2.166, sig = 0.033), Training and Development (t = 3.376, sig = 0.001), Reward Management (t = 4.728, sig = 0.000), and Teamwork Management (t = 2.636, sig = 0.010) had a significant effect on performance with a t table value of 1.894. Ship engine maintenance management was proven to mediate the relationship between human resource management practices and performance (t = 21.136, sig = 0.000). The research model showed a high level of explanation with an Adjusted R Square of 84.7%. The study recommends improving the recruitment system, developing training programs, improving the reward system, optimizing time management, and strengthening the ship's engine maintenance system to improve shipping safety performance.

Pengaruh Quenching Terhadap Sifat Mekanik dan Struktur Mikro Baut Connecting Rod Bekas Untuk Alat Gesek FSW Ari Putranto, Wahyu; Khaeroman; Susanto; Herdawan, Deri; Noviarianto
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2531

One method of joining soft metals such as aluminum that is widely used is Friction Stir Welding (FSW). The friction tool is a very important part of FSW. Friction tools are usually made from hardened H13 steel. This research aims to make a friction tool from steel connecting rod bolts used in marine diesel engines. The experimental methods used include FSW tool design, heat treatment of the material at a temperature of 900oC followed by a quenching process with water and salt water cooling media, then continued with material testing (chemical composition test, hardness test, and micrographic test). The test results obtained from the chemical composition test show that the connecting rod bolts include AISI 4145 steel material. The highest hardness value obtained from the connecting rod steel in the saltwater quenching process was 52.67 HRC with a martensite phase, as seen from the micrographic test. Used steel connecting rod bolts from marine diesel engines can be used as FSW friction tool material.

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