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All Journal Infotekmesin Majalah Ilmiah Gema Maritim Marine Science and Technology Journal Jurnal Inovasi Hasil Pengabdian

Wilastari, Santhi

Unknown Affiliation

Author-ID : 1245165

Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Other

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Articles

OPTIMASI TEMPERATUR YANG MEMPENGARUHI KEKERASAN PADA PEMBUATAN BALL MILL DENGAN CARA HOT ROLLING Wilastari, Santhi
Infotekmesin Vol 9, No 02 (2018): Infotekmesin, Juli 2018
Publisher : Politeknik Negeri Cilacap

Violence is one of the characteristics needed by the ball mill. To get this trait up to now is still done by trial and error so it is very ineffective. Therefore, a study was conducted to determine the parameters that affect the hardness of the ball mill and the optimal level. There are three parameters that are thought to affect ball mill hardness, namely the temperature of raw material (Tm), the initial temperature of the quenching process (Tq) and the final temperature of the quenching process (Tt).

Pengaruh Variasi Kecepatan Putar Dalam Metode Stir Casting Terhadap Sifat Kekerasan Al- Sic Untuk Aplikasi Blok Rem Kereta Api Wilastari, Santhi; AP, Bayuseno; Nugroho, Sri
Majalah Ilmiah Gema Maritim Vol 13 No 1 (2011): Februari 2011
Publisher : Politeknik Bumi Akpelni

Penelitian ini dilakukan untuk mengetahui tentang sifat kekerasan pada Al- SiC yang dihasilkan dari proses pengecoran dengan metode stir casting dengan variasi putaran 300, 500, dan 700 rpm dengan lama waktu pengadukan 10 menit. Pada penelitian ini Al yang digunakan adalah Al hasil limbah produksi dengan penambahan SiC sebesar 10% sebagai penguat yang dicampurkan pada saat pengecoran. Dari hasil penelitian ditemukan bahwa nilai kekerasan hasil pengecoran dengan variasi putaran masih jauh dibandingkan kekerasan besi cor karena kadar SiC sebagai penguat yang dicampurkan masih sangat sedikit hanya 10% sehingga tingkat kekerasannya juga masih sangat rendah. Tetapi bila dibandingkan dengan Al murni nilai kekerasan hasil pengecoran dengan variasi putaran berada diatas Al murni yang artinya kekerasan hasil pengecoran dengan variasi putaran lebih baik daripada kekerasan Al murni. Nilai kekerasan tertinggi terjadi pada posisi bawah sedangkan nilai kekerasan terendah terjadi pada posisi atas. Hal ini terjadi karena pada saat pengecoran ada waktu jeda antara selesainya proses pengadukan dengan waktu penuangan sehingga terjadi proses pengendapan yaitu turunnya SiC ke posisi bawah.

Analisa Penyebab Terjadnya Kegagalan Pembakaran Awal Pada Ketel Uap Bantu Wilastari, Santhi; Puryadi
Majalah Ilmiah Gema Maritim Vol 19 No 1 (2017): Gema Maritim Vol 19 No 1 Februari 2017
Publisher : Politeknik Bumi Akpelni

Injektor dan injection pump di dalam sistem mesin induk sangat berperan besar dalam mendukung proses pembakaran. Prinsip kerja dari injektor ialah mengabutkan bahan bakar dan juga menyemprotkan bahan bakar ke dalam ruang silinder untuk mendukung terjadinya pembakaran dan prinsip kerja injection pump adalah memompa bahan bakar tekanan tinggi ke injector. Dengan melihat hal diatas sangat penting peran dari tekanan kerja bahan bakar dari injection pump untuk mempermudah proses pengabutan. Di dalam pelaksanaan penelitian terdapat permasalahan yang mengganggu kinerja dari injector antara lain: terjadi penyumbatan pada nozzle, jarum macet, nozzle telah longgar dan injection pump, antara lain: plunger aus, bearing aus, delivery valve aus dan bocornya pipa tekanan tinggi. Oleh sebab itu penulis melaksanakan penelitian tentang permasalahan apa saja yang dapat mengganggu kinerja injector dan turunnya tekanan bahan bakar.

Pengaruh Kualitas Udara Bilas Terhadap Proses Pembakaran Pada Mesin Type Matshui 31 M-29 Wilastari, Santhi; Djajari
Majalah Ilmiah Gema Maritim Vol 19 No 1 (2017): Gema Maritim Vol 19 No 1 Februari 2017
Publisher : Politeknik Bumi Akpelni

Dengan berkembangnya dunia ilmu pengetahuan dan teknologi, khususnya dan segi transportasi laut, sangatlah efisien untuk memenuhi sarana angkutan dari satu negara ke negara lain. Dalam hal ini kapal laut mempunyai peranan yang sangat penting untuk memenuhi kebutuhan tersebut. Sesuai dengan ketentuan dunia ilmu pengetahuan dan teknologi, dalam pengoperasian kapal diperlukan tenaga-tenaga yang professional. Begitu juga dalam perawatan alat-alat yang ada di atas kapal dan yang menunjang kelancaran gerak kapal. Salah satunya adalah perawatan terhadap motor diesel kapal. Dalam peranan dan fungsinya, motor diesel pada kapal merupakan bagian yang sangat penting dalam menunjang proses kelancaran dalam pelayaran dan kapal itu sendiri. Untuk menjaga agar motor diesel kapal tetap baik dan dapat memberikan manfaat yang maksimal perlu adanya perawatan. Salah satunya dengan diadakan pembilasan. Dimana pembilasan ini berguna untuk mengeluarkan gas-gas bekas dan silinder dan menggantinya lagi denganbahan bakar (udara) baru. Dengan demikian silinder tetap bersih sehingga dapat menunjang kelancaran gerak kapal itu sendiri. Sehubungan dengan hal tersebut di atas, maka timbul keinginan penulis untuk mengetahui lebih banyak tentang pembilasan.

Analisis Ketidakstabilan Performa Kerja Governor Mesin Diesel Penggerak Utama Pada Kapal MV Pekanbaru A, Hanung Satria; Pujiyanto, Fajar; Wilastari, Santhi; Puryadi, Puryadi
Marine Science and Technology Journal Vol 5 No 2 (2024): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.3259

The diesel engine is a vital component that serves as the ship's main propulsion system. This engine plays a crucial role in the efficiency and operational stability of the ship. One of the important parts of a diesel engine is the governor, which functions to regulate the engine's rotational speed to keep it stable. Problems with the governor can cause engine speed instability, leading to operational issues, reduced fuel efficiency, and a higher risk of damage. The study uses observational methods to identify the main causes of engine speed instability due to governor failure. Basic data include measurements and observations, maintenance history, and records of past failures. Observations on engine speed instability caused by governor failure focus on electrical issues, material wear, and extreme temperatures. This research emphasizes the importance of good and routine maintenance for the governor. Maintenance includes regular inspections, electrical maintenance, and the replacement of worn components. The research results are expected to provide practical recommendations for ship technicians to improve maintenance activities and address diesel engine speed instability issues. Implementing the findings of this research is expected to enhance the overall safety and operational efficiency of the ship

Studi Tidak Tercapainya Temperature Secara Optimal pada Mesin Pendingin (Refrigerator) di Kapal MT. Kuang Fakhrozi, Rizal Fahmi; Darmana, Eka; Wilastari, Santhi
Marine Science and Technology Journal Vol 5 No 2 (2024): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.3355

A refrigeration machine is a device used to transfer heat from indoors to outdoors to make the temperature of the room lower with the aim of cooling/preserving food. Cooling machines on MT ships. Kuang, when the ship was sailing, experienced that the optimal temperature was not reached, so it was necessary to observe this problem. So that action can be taken so that similar problems can be resolved and do not happen again. This research is based on a case study conducted on the MT ship. Kuang. The method that the author uses in collecting data is the observation method, namely a data collection method by making direct observations of the research object, an interview method with the author communicating with technicians regarding the problem being handled, as well as a literature study method, namely collecting references contained in relevant books, journals and studies. Approach to problem analysis using a qualitative descriptive method. From the results of the discussion carried out by the author, it is known that the optimal temperature was not achieved due to freon leaks in the evaporator pipe, dirty oil separator, dirty condenser and sea chest, and the cooling machine door not being tight. This is the impact of lack of maintenance on the cooling machine (refrigerator) and the cooling machine is quite old.

SOSIALISASI KESELAMATAN KERJA PADA NELAYAN DI DESA MARGOREJO KECAMATAN CEPIRING KABUPATEN KENDAL Suprihono; Pujiyanto, Fajar; Darmana, Eka; Wilastari, Santhi; Khamdilah, Ali; Utami, Tini
JURNAL INOVASI HASIL PENGABDIAN (JIHAN) Vol. 2 No. 2 (2024): JURNAL INOVASI HASIL PENGABDIAN (JIHAN)
Publisher : 3026-1791

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51792/jihan.v2i2.39

Pengabdian masyarakat ini bertujuan untuk mensosialisasikan keselamatan kerja pada nelayan serta memberikan penjelasan tentang pengelolaan hasil tangkap ikan oleh nelayan. Pendekatan dilakukan dengan metode ceramah materi dan sosilaisasi penggunaan alat-alat keselamatan pelayaran. Pengabdian kepada masyarakat ini diharapkan dapat memberikan pengetahuan yang mendalam kepada para nelayan khususnya nelayan desa Margorejo Kecamatan Cepiring Kabupaten Kendal, agar dapat menganstisipasi keadaan darurat selama dalam pelayaran dan setelahnya bisa mengolah hasil tangkapnya untuk memenuhi kebutuhan pangan dan pemenuhan kebutuhan ekonomi yang lainnya.

Upaya Optimalisasi Kesiapan Alat – Alat Pemadam Kebakaran Dalam Menjaga Keselamatan di Atas Kapal Wilastari, Santhi; Wibowo, Syailendra
Marine Science and Technology Journal Vol 2 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1586

The objectives discussed in this paper are to answer the questions in the subject matter, namely to increase understanding of safety equipment, especially fire fighting equipment. So that it can optimize its performance. Increase the level of readiness of fire extinguishers so that whenever and whenever fire extinguishers have to be used they will be maximally used. OHS officers are people who work with the task of occupational health and safety as well as operating and maintaining fire extinguishers so that fires can be prevented. Where the duties and responsibilities must be carried out and accounted for properly according to orders from the leadership of the company. Fire extinguishers are one of the countermeasures and minimize the occurrence of fire hazards. So the role of fire extinguishers is very important, fire fighting is an action that must be taken to create a safe and efficient work environment. Skills include knowledge of fire extinguishers and the responsibilities that must be carried out. Therefore, it is very necessary to improve the skills of OHS officers, namely by increasing the material for the discussion of fire extinguishers, carrying out fire extinguishing exercises and maintaining and checking fire extinguishers.

Analisis Propeller Yang Tidak Balance pada Kapal Tugboat Anugerah 1 Apriyanto, Ricky; Darmana, Eka; Wilastari, Santhi
Marine Science and Technology Journal Vol 4 No 2 (2023): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v4i1.2718

The case study on the tugboat award 1 experienced problems with the propeller which made it possible to be out of balance. The purpose of this research is to find out the causes of unbalanced propellers on ships and how to overcome them. The use of research methods using observation, interviews and data analysis by observing, reviewing and analyzing objects or problems that will be examined directly so that the data obtained is objective because the author experienced it himself and was at the ship docking location when the work of the propeller was not perfect. From the data obtained, then an analysis of descriptive qualitative methods was carried out. The results of this study state that the unbalanced propeller is caused by fouling, erosion, cracks, and deformation of the propeller blades. Possible triggering factors include long absence of maintenance, old components, and negligence in operation. An unbalanced propeller if not handled immediately is feared to cause damage to other components such as damage to the stern tube which results in leaks and can endanger the ship.

Co-Authors A, Hanung Satria AP, Bayuseno Apriyanto, Ricky Djajari Eka Darmana, Eka Fakhrozi, Rizal Fahmi Khamdilah, Ali Pujiyanto, Fajar Puryadi Puryadi Puryadi Sri Nugroho Suprihono Utami, Tini Wibowo, Syailendra

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