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All Journal Construction and Material Journal Jurnal Pengabdian Kepada Masyarakat Abdi Putra Jurnal Maritim Polimarin
Rifki Arya Wiguna
Politeknik Maritim Negeri Indonesia
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Indentifikasi Limbah Besi dan Pemanfaatannya Untuk Pembuatan Perahu Lambung Datar Arif Rakhman Suharso; Purwanto; Dhesi Wulansari; Noviarianto; Rifki Arya Wiguna
Jurnal Pengabdian Kepada Masyarakat Abdi Putra Vol 2 No 1 (2022): Januari 2022
Publisher : Universitas Nusa Putra & Persatuan Insinyur Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (905.851 KB) | DOI: 10.52005/abdiputra.v1i3.105

Abstract

Bidang usaha produktif yang dipilih dalam kegiatan pengabdian ini adalah bidang usaha pengolahan besi bekas untuk diidentifikasi sebagai bahan pembuatan kapal lambung datar. Selain dapat diandalkan untuk membangun kekuatan maritim Indonesia, Kapal Pelat Datar ini juga memiliki daya saing kuat dan biaya produksinya jauh lebih murah jika dibandingkan dengan kapal-kapal berbahan baku kayu maupun fiber. Kegiatan yang dilakukan oleh mitra usaha salah satunya adalah pemotongan plat kapal dan di tempat usaha juga terdapat perahu dengan lambung datar sehungga mendorong kami untuk melakukan identifikasi plat kapal. Permasalahan lain yang dihadapi mitra adalah minimnya pengetahuan mengenai pengolahan besi scrap tersebut menjadi material sesuai pesanan yang diinginkan dari industry. Permasalahan lainya yang juga dihadapi adalah kurangnya pengetahuan mengenai identifikasi plat besi sehingga proses identifikasi tidak sesuai yang menyebabkan kesalahan dalam penafsiran harga.. Kegiatan Pengabdian ini dilaksanakan di tempat usaha kecil limbah besi di desa gedanganak Ungaran Timur. Pengolahan besi bekas sangat potensial karena banyak industri baja yang menggunakan bahan skrap sebagai bahan dasarnya, baik pada industri mesin maupun industri logam. Besi bekasan penggunaan skrap karena bahan ini mudah didapat, memiliki nilai komparatif yang tinggi, memiliki komposisi kimia yang masih sangat memungkinkan untuk diolah lebih lanjut, serta dapat mengurangi permasalahan yang berkaitan dengan limbah logam.
Variasi Diameter Nozzle Terhadap Lamanya Proses Vakum Pada Fresh Water Generator di Laboratorium Polimarin Khaeroman Khaeroman; wahyu Ari Putranto; Susanto Susanto; Rifki Arya Wiguna; Agung Nugroho
Jurnal Maritim Polimarin Vol. 7 No. 1 (2021)
Publisher : PPPM Polimarin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (265.75 KB) | DOI: 10.52492/jmp.v7i1.8

Abstract

Ejector is a static pump which is worked by a vacuum principal. A vacuum which is happened in the ejector affect the performance and the ability of suction on the secondary mass flow section. A vacuum ejector in the fresh water generator affects the amount of fresh water which is generated. The objective of this research is to know the affection of variation in the outlet diameter of the nozzle towards secondary mass flow, especially on the air suction section (vacuum). In this research, an analysis has been done in a fresh water generator (FWG) with three alternative design of the outlet diameter of the nozzle using Computer Fluid Dynamics (CFD) method to get the optimal performance. The inlet pressure of primary flow is regulated to be steady at 3 bars. The variations of the diameter outlet of the nozzle are 4, 6, and 8 mm. The distance between the edge of the nozzle with outlet flow of the pipe is made at a settled position. The edge of the nozzle is at 3 mm inside the outlet flow of the pipe measured from the inside edge of the pipe. The result of CFD method is shown that on the variation of the outlet diameter of the nozzle 8 mm has the biggest mass flow (4.6838048 kg/s) between 4 and 6 mm. The implication of this research is that the outlet diameter of the nozzle 8 mm has the maximum value of a vacuum.
OPTIMALISASI SIFAT MEKANIK SERAT ALAM DARI SERBUK KAYU ULIN MELALUI TEKNIK PENGERINGAN SEBAGAI PENGUAT MATERIAL BIOKOMPOSIT ANJUNGAN KAPAL Purwanto Purwanto; Erwin Sutantyo; Heri Kiswanto; Khoirotun Nafillah; Rifki Arya Wiguna; Arif Rakhman Suharso
Construction and Material Journal Vol. 5 No. 2 (2023): Construction and Material Journal Vol. 5 No. 2 Juli 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v5i2.5699

Abstract

Ironwood (eusideroxylon zwageri) is a type of wood that has great potential for industrial development. Currently, forest exploitation activities and the wood industry produce 30%-60% solid wood waste and have not been utilized optimally. One way to use it is to make composite materials. The purpose of this study was to determine the most optimal drying technique of ironwood powder, to provide information on the morphology, content and functional groups as well as the mechanical strength of the biocomposite with a volume fraction ratio. The ironwood powder samples in this study were characterized using the SEM-EDX, FTIR, and Vickers hardness tests. The results of the SEM test obtained information that the morphology of all samples had similarities, namely the surface was rough and the measured diameter of the sample ranged from 50-100 µm. While the EDX test obtained information that all samples had high carbon and oxygen content. The FTIR test results showed that ironwood powder had a cellulose content as evidenced by the absorption peaks and chemical bonds that were the same as pure cellulose. The results of the mechanical test on the biocomposite showed that sample C had the highest average HV value of 13.3 N/m2, while sample E had an average HV value of 12.26 N/m2 below the HV value of sample E. Meanwhile, sample A obtained the lowest hardness value with an average HV 5.93 N/m2.
Co-Authors Agung Nugroho Arif Rakhman Suharso Erwin Sutantyo Heri Kiswanto Khaeroman, Khaeroman Khoirotun Nafillah Noviarianto Noviarianto Purwanto Susanto Susanto Wahyu Ari Putranto