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All Journal International Journal of Applied Technology Research Industrial Research Workshop and National Seminar Journal of Green Science and Technology
Haryadi Haryadi
Jurusan Teknik Mesin,Politeknik Negeri Bandung,Bandung 40012
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation Other

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Studi Numerik Gaya Angkat terhadap Pelampung pada Pembangkit Listrik Tenaga Gelombang Laut Haryadi Haryadi; Sugianto Sugianto
Prosiding Industrial Research Workshop and National Seminar Vol 9 (2018): Industrial Research Workshop and National Seminar
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v9i0.1130

Abstract

Indonesia memiliki pantai kedua terpanjang di dunia setelah Kanada. Hal tersebut menjadi keuntungan bagiIndonesia dari segi besarnya potensi energi laut. Salah satu potensi energi laut yang belum diperhatikan adalahenergi gelombang. Dari berbagai metoda Pembangkit Listrik Tenaga Gelombnag Laut (PLTGL) sertamempertimbangkan potensi yang ada, metoda benda mengapung berosilasi dengan sistem hidrolik dipilih untukdikembangkan. Penelitian ini bermaksud untuk mengetahui karakteristik gaya yang dihasilkan oleh pelampung diatas gelombang laut, untuk dimanfaatkan sebagai pendukung PLTGL. Studi dilakukan secara numerikmenggunakan perangkat lunak Fluent Versi 6, dalam dua dimensi, dengan menggunakan metode Volume of Fluid(VOF). Pelampung dimodelkan dengan bentuk persegi panjang, yang mempunyai tebal 1,6 m dengan panjang 6m. Gelombang dimodelkan dalam bentuk gelombang antara/dangkal (intermediate/shallow wave), dengan tinggigelombang 1,6 m dan panjang gelombang 20 m. Dari simulasi diperoleh bahwa gaya netto dalam satu perodegelombang, terjadi pada waktu t =2,5 s adalah sebesar 18.672 N. Bila dibandingkan dengan gaya apungArchimides, maka gaya angkat tersebut jauh lebih kecil.
Perancangan Alat Perajang Umbi Porang dengan Pendorong Pneumatik dan Kontrol PLC M. Taofiq Nurhibatullah; Haryadi Haryadi
Prosiding Industrial Research Workshop and National Seminar Vol 12 (2021): Prosiding 12th Industrial Research Workshop and National Seminar (IRWNS)
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (514.718 KB)

Abstract

Perancangan Alat Perajang Umbi Porang dengan Pendorong Pneumatik dan Kontrol PLC
Biodiesel Production from Rubber Seed Oil as An Alternative Energy Source – A Review Herawati Budiastuti; Nira Aulia Hanifah; Devita Utami Mardiani; Haryadi Haryadi; Rusdianasari Rusdianasari; Ahmad Fudholi
Jurnal Internasional Penelitian Teknologi Terapan Vol 3 No 2 (2022): October 2022
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v3i2.92

Abstract

Biodiesel is one of alternative energies that can be used to overcome problem caused by limited amount of fossil fuels reserved. Biodiesel can be made from rubber seed oil that has high potencies in Indonesia. The availability of rubber seed is quite much with more than 3-million-hectare rubber plantation area. The production of biodiesel from rubber seed oil has been carried out by several researchers using various methods. Therefore, this study was conducted as a review to obtain optimum operation conditions and effect of antioxidant addition in biodiesel production. Production methods of biodiesel from rubber seed oil observed in this study are esterification-transesterification, one stage transesterification, and in situ transesterification methods. Types of antioxidant added to biodiesel from rubber seed oil observed are TBHQ, D-TBHQ, BHA, BHT, PG, and OG. Esterification-transesterification was chosen as the most effective method in producing biodiesel with a minimum yield of 96.4%. Antioxidant addition of TBHQ with 1000 × 10-6 (ω) dosage was selected as the most effective to increase biodiesel induction period to become 6.41 hours, fulfilling the SNI 7182-2015 standard, which is minimum of 6 hours. Standard used as the reference for observing biodiesel parameters is SNI 7182-2015.
Enhancement Of Salt Quality with Recrystallization Method from Crude Salt Raw Material on a Laboratory Scale Joko Suryadi; Saifa Haikal Witcaksono; Putri Widad Salsabila; Eko Andrijanto; Yohana Fransiska Ferawati; Retno Dwi Jayanti; Kardian Rinaldi; Haryadi Haryadi
Journal of Green Science and Technology Vol 9 No 3 (2025): Journal of Green Science and Technology Vol. 9 No. 3 December 2025 Special Editio
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i3.10609

Abstract

Indonesia has significant maritime potential, particularly in salt production. However, national salt production has not yet met domestic demand, especially for industrial-grade salt, which requires a minimum NaCl content of 97%. Crude salt produced using traditional methods often contains only 88-94% NaCl and includes impurities such as Ca, Mg, and sulfate. This research aims to produce recrystallized salt that meets industrial standards and to determine the optimal conditions in a laboratory-scale simulator. The experimental method was conducted by simulating evaporation on a recrystallization table. Salt solutions were prepared from crude salt with varied concentrations of 22%, 25%, and 30%. The observed parameters included solution density, evaporation rate, and the content of NaCl, total hardness, and sulfate in the salt product. The results showed that recrystallization significantly increased the NaCl content and reduced impurities. Optimal conditions were achieved with a 22% salt solution, where crystal formation produced recrystallized salt with an NaCl content of 99.33%, total hardness of 0.47%, and sulfate content of 8.56 ppm. This quality has the potential to meet industrial salt standards. This study can serve as a reference for industrial salt production on a larger scale.
Co-Authors Ahmad Fudholi Andrijanto, Eko Devita Utami Mardiani Herawati Budiastuti Jayanti, Retno Dwi Kardian Rinaldi M. Taofiq Nurhibatullah Nira Aulia Hanifah Putri Widad Salsabila Rusdianasari Rusdianasari Saifa Haikal Witcaksono Suryadi, Joko Yohana Fransiska Ferawati