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All Journal Rekayasa Mesin WARTA Jurnal Rekayasa Material, Manufaktur & Energi Machine : Jurnal Teknik Mesin Jurnal Elemen Majamecha Jurnal Teknik Industri Terintegrasi (JUTIN) Journal of Mechanical Engineering Warta LPM AutoMech : Jurnal Teknik Mesin
Dewi, Rany Puspita
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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Journal : Jurnal Elemen

 1 
PENGARUH KONSENTRASI HCl DALAM PROSES HIDROLISIS PADA PEMBUATAN BIOETANOL KULIT PISANG KEPOK Alfiansyah, Irsyad; Mujiarto, Sigit; Sulistiyo, Raka Mahendra; Dewi, Rany Puspita
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 1 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i1.300

Abstract

Dependence on fossil fuels results in depletion of petroleum. In solving this problem, it is necessary to use alternative fuels in the form of bioethanol. Bioethanol is made by utilizing kepok banana peels. There are quite a lot of banana peels, approximately one third of the bananas that have not been peeled. This study was conducted to analyze the ethanol content, water content, density, and viscosity of kepok banana peel bioethanol. This study uses an experimental method of the effect of HCl concentration (2%, 5%, and 8%) in the hydrolysis process in the manufacture of kepok banana peel bioethanol. From the results of the study, the best bioethanol characteristics at a concentration of 2% HCl with an ethanol content of 9%, a water content of 70.52%, a density of 0.9861 g/ml, and a viscosity of 0.010768212 dPa.s. The characteristics of the bioethanol produced are different from the characteristics of pertalite.
PERANCANGAN ALAT PRESS SARI JAMU MENGGUNAKAN SISTEM HYDRAULIC KAPASITAS 2 KG Rahmat, Bagas Subakti; Dewi, Rany Puspita; Budiono, Herru Santosa
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 1 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i1.331

Abstract

The process of making herbal medicine still uses traditional methods for making herbal medicine. One of them is the process of squeezing herbal juice. The semi-automatic herbal juice press tool uses a hydraulic system with AISI 304 material. The results of designing the herbal juice press tool are the design of a press tool with a capacity of 2 kg and has dimensions of length 250 mm, width 250 mm, and height 250 mm. The load on static testing is 100 kg. The von Mises stress value in the frame is 38.23 MPa. The deformation value of the jamu juice press frame is 0.065. The smallest safety factor value for the jamu juice press frame is 5. The von Mises stress value for the jamu juice press tube is 21.057 MPa. The maximum deformation value of the jamu juice press tube is 0.017 mm. The smallest safety factor value for the herbal juice press tube is 9.735.
PEMANFAATAN KULIT DURIAN UNTUK MENGHASILKAN BAHAN BAKAR ALTERNATIF MELALUI PROSES FAST PYROLISIS Arsyad, Muhammad Zanu Nur Arsyad; Dewi, Rany Puspita; Hayati, Nur
ELEMEN : JURNAL TEKNIK MESIN Vol. 12 No. 2 (2025)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v12i2.325

Abstract

Durian skin waste has not been utilized properly so in the end it just piles up in the trash, so a study is needed to reduce the amount of durian skin waste that is not utilized properly. Pyrolysis is a heating process without oxygen. This study aimed to determine the amount of bio-oil, viscosity value, density value, and calorific value of the durian skin waste tested. Temperatures of 350 ℃, 400 ℃, and 450 ℃ are variations in this study. The study's results using the fast pyrolysis process were 120 ml, 130 ml, and 150 ml. The resulting viscosity values ​​are 5.4 mm²/s, 5.2 mm²/s, and 4.6 mm²/s, the resulting density values ​​are 725.5 kg/m³, 727.7 kg/m³, and 743.3 kg/m³. The resulting calorific values ​​are 14.6 MJ/kg, 17.1 MJ/kg, and 18.5 MJ/kg.
Co-Authors Agung, Hidayat Alfiansyah, Irsyad Arif Rahman Saleh Arif Rohman Arsyad, Muhammad Zanu Nur Arsyad Budiono, Herru Santosa Fajarningrum , Nurmala Dyah Fajri, Ahmed Ikhsan, Nurikhsan Hera Pratama Imantoro, Syahrul Huda Kurniawana,, Akbar Mario Ammar Rasyid Muhaimin, Rijal Arif Nur Hayati R Rizal Isnanto Rahayu, Tri Puji Rahmat, Bagas Subakti Raka Mahendra Sulistiyo Saputra , Trisma Jaya Sigit Iswahyudi Sigit Joko Purnomo Sigit Mujiarto Solly Aryza Sumardi . Syaifudin, Akbar Taufik, Ikhwan Trisma Jaya Saputra Wandi Arnandi Zuljian, Bima