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All Journal EKSAKTA: Journal of Sciences and Data Analysis POSITRON Techno: Jurnal Penelitian Edu Sains: Jurnal Pendidikan Sains dan Matematika IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Al Ishlah Jurnal Pendidikan Jurnal Penelitian Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Redoks JURNAL PENDIDIKAN TAMBUSAI Aptisi Transactions on Technopreneurship (ATT) Kinetika Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Teknologi International Journal of Research in Vocational Studies (IJRVOCAS) Aptekmas : Jurnal Pengabdian Kepada Masyarakat Chemical Engineering Journal Storage (CEJS) Proceeding ISETH (International Summit on Science, Technology, and Humanity) Internet of Things and Artificial Intelligence Journal Innovative: Journal Of Social Science Research Bioedunis Journal International Journal of Mechanics, Energy Engineering and Applied Science (IJMEAS) Applied Engineering, Innovation, and Technology Journal of Experimental and Applied Physics

Yohandri Bow

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Author-ID : 423245

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Transportation Veterinary Other

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Effect of DC Voltage on Prototype of Biodiesel Electrostatic Separator with Glycerin from Waste Cooking Oil Jaya Utama Putra; Leila Kalsum; Yohandri Bow
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 3, No 3 (2018): October 2018
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v3.i3.89

The limitations of fossil fuel support on fulfillment of energy need in a sustainable and environment friendly fashion has drove society to efforts of finding and developing fresh and renewably resources. Biodiesel is one the renewable energy resource and shows environment friendly property, consist of alkyl of fatty acids monoester originated from vegetable oil or animal fat.One of important steps in biodiesel production is separation of glycerin from product. Electrostatic method has been proved in accelerating saturation of glycerin. However, several aspects still need a careful assessment to acquire biodiesel production process with standard quality assigned. In this work, we designed an electrostatic separator of biodiesel from glycerin using waste cooking oil feed. The prototype was tested in several different voltages 12 Vdc, 20 Vdc, 30 Vdc and 33.5 Vdc. The result shows the highest voltage obtained is 33.5 Vdc, separation time 2 minutes 10 seconds having viscosity, water content and density i.e. 7.2139 cSt, 0.0321% and 0.85 g/mL respectively whereas flash point increase to 1917 C. The data confirmed that the product fulfills required standard value fordensity, water content and flash point.

The Investigation of Savonius Type and Darrieus H Type Wind Turbine Simulation with Wind Speed Variable Wibby Aditya Putra Utama; Yohandri Bow; M. Syahirman Yusi
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 2 (2021): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

The demand for electrical energy that continues to increase along with the advancement of civilization and also the increasing number of people as well as the reduced level of fulfillment and availability of non-renewable energy sources, it is necessary to have renewable energy resources that capable of fulfill these energy demand in a more environmental friendly. One of the natural energies that we can use is wind energy, which is easy to get and lasts continuously. This research examines the comparison of the power generated from the vertical axis wind turbine savonius type and darrieus H type. The wind that use in this research get from from the fan. The test is doing by varying the wind speed by adjusting the fan speed. The fan is directed to the wind turbine to rotate the wind turbine. To measure the wind speed produced by the fan, a digital anemometer is used. The result of this research is the relation data of voltage to rpm and voltage to wind speed of wind turbine.

Automatic Cleaning System Design to Increase PV Panel Output Power Muhammad Zulfahmi; RD Kusumanto; Yohandri Bow
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 2 (2021): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

The existence of the Township Housing, which is currently near the coal mine site, precisely in Tanjung Enim, South Sumatra, with a relatively open area (41 Ha) and a relatively high elevation of approximately 100 meters over the sea level, has the potential to be installed with PV panels as a solar power plant. Installation of PV panels in residential areas close to coal mining activities has the potential to indirectly generate a lot of mine dust which can reduce the amount of light received by the PV panels, which in turn can affect the output power of the PV panels. The purpose of this study is to analyze the use of an automatic cleaning system to increase the output power of PV panels by comparing the output power of PV panels produced between PV panels with an automatic cleaning system in the form of a water sprayer with PV panels that are not equipped with a water sprayer (standard PV installation). The use of an automatic cleaning system shows an increase in the average output power of 44.56 Watt. The difference between Isc PV water sprayer and normal PV is 0.5513 A. Iload measurement on PV water sprayer is 0.1973 A higher than normal PV, while for VOC PV panel water sprayer is smaller than normal PV is about 0.45 V. For PV water sprayer Vload is 0.431 V is more significant than normal PV panels. Meanwhile, for the generated load power or Pload, the PV water sprayer is 9.47 watts higher than normal PV. From all these values, the average efficiency produced by PV water sprayer is 1.81% greater than the efficiency produced by normal PV. This study shows that PV using a water sprayer produces an average output power of 44.56 watts

Pyrolysis of Lubricant Waste into Liquid Fuel using Zeolite Catalyst Heru Afriansyah; M. Reza Ramlan; Miranda Roulina T; Yohandri Bow; Fatria
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 4 (2022): IJRVOCAS - Special Issues
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

The number of means of transportation in Indonesia continues to increase from year to year. Along with this, the amount of used oil waste oil becomes something more useful by considering the high hydrocarbon content, namely the pyrolysis method with a raw material ratio of 1:1 to be converted into liquid fuel which is ready to be commercialized by catalytic cracking process using a zeolite catalyst of a certain amount. 25% by weight of the raw material which is useful for accelerating the reaction so as to save energy use and improve the quality of the resulting product. Observations were made by looking at the effect of temperature variations ranging from 250oC, 300oC, 350oC, to the results of the pyrolysis process which aims to obtain the optimal process temperature.

Effect of Concentration of NaOH and H2SO4 Catalysts on Hydrogen Gas Production Efficiency Diah Iswandari; Idham Mahenri; Yohandri Bow; Adi Syakdani; Robert Junaidi
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 1 No. 4 (2022): IJRVOCAS - Special Issues
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Indonesia has an ocean area of 5.8 million km2, water is the event of the decomposition of water compounds (H2O) into hydrogen gas (H2) and oxygen (O2) by using an electric current through water. In this study, the electrolysis of water at an electrolytic concentration containing NaCl can take place quickly with various catalysts of NaOH, and H2SO4 with concentrations of 0.1M, 0.25M, 0.5M, 0.75M, and currents of 15A, 25A and 35A. From the results of the study, it was found that the greater the current and the concentration of the catalyst, the greater the volume of gas produced and the efficiency of the flow, and a significant effect. The highest hydrogen gas produced was 0.4745 L at a concentration of 0.75M with a current of 35A for a NaOH catalyst and with a H2SO4 catalyst, gas with a volume of 0.48823L was produced at a current of 35A and a concentration of 0.75M and the highest current efficiency at a current of 35A the highest efficiency at a concentration of 0.75M was 89.354% for the NaOH catalyst, and the H2SO4 catalyst obtained the highest current efficiency at a concentration of 0.75M, which was 43.325%.

Study of Effect Changing the Blade Shape and Lift Angles on Horizontal Wind Turbine Ichsan Astanto; Fatahul Arifin; Yohandri Bow; Sirajuddin
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 1 (2022): IJRVOCAS - April
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i1.92

The lack of energy commodities such as coal and petroleum makes the cost of these commodities soar. This event shows how much countries in the world are still very dependent on fossil fuels, and it is fitting that the transition to new renewable energy can be realized soon, low emission and environmentally friendly energy is the hope in the future. Indonesia has a supply of renewable energy sources that are abundant is a great force for this clean energy revolution. The momentum of the presence of the first wind farm in Indonesia operating in Mattirotasi Village, Sidrap Regency, Central Sulawesi in Indonesia with a wind power plant capacity (PLTB) of 75 MW is positive evidence that the government is starting to pay more attention to the development of renewable energy technology in Indonesia. Turbine technology that is able to optimize wind speed in Indonesia must be the answer so that this energy is more useful. In this study, the idea for an experimental analysis of "Study of the Effect of Blade Shape Change and Lift Angle on Horizontal Wind Tubin using Nvis 6009 Experimentation with Solar and Wind Energy props. The Nvis 6009 is a prop used by vocational schools to understand the concept of a DC power plant based on solar and wind energy. To optimize low wind speed, on Nvis 6009 horizontal axis wind turbine (HAWT) with different type 3 Blade and changes in lift angle, so that we can know the effect of the resulting voltage change, so that we can know the effect of the resulting voltage change. Simple illustrations using the Solidworks application are done as validation of the results of previous research and to obtain preliminary data of research experiments. The final results of the test on Type Blade II obtained maximum data at a Blade angle of 13 ° with a wind speed of 3.9 m / s, Blade Rotation 2587 Rpm produces a voltage of 2.8 V.

Karakterisasi Minyak Jelantah Hasil Produksi Keripik Nenas Dengan Metode Vacuum Frying Rusdianasari Rusdianasari; Leila kalsum; Aida Syarif; Yohandri Bow
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 2, No.2 (2019) : APTEKMAS Volume 2 Nomor 2 2019
Publisher : Politeknik Negeri Sriwijaya

Small and medium businesses (SMEs) have developed rapidly in Indonesia, especially for the food sector. One of the most productive UKM in Prabumulih city is UKM Melati which produces pineapple chips from pineapple which is a regional superior product from Prabumulih city. To get dried and tasty pineapple chips, frying is done by using a vacuum frying method that requires a lot of cooking oil. The results of vacuum drying frying will produce used browning frying oil or used cooking oil and cannot be reused if the characteristics of used cooking oil exceed the standard. For this reason, an analysis is needed to determine the characteristics of used cooking oil from the results of the production of pineapple chip vacuum vacuum frying methods. From the results of the analysis that has been carried out on filtered used cooking oil, the value of free fatty acid (FFA) is 4.9% (maximum requirement 0.3%) and peroxide value 1.8 Meq/kg. Thus, used cooking oil cannot be used anymore for frying.

Konversi Pelumas SAE 5W-30 Bekas Menjadi Bahan Bakar Cair Dengan Proses Hydrocracking Berbasis Katalis Yohandri Bow; Sutini Pujiastuti Lestari; Fatria Fatria; Muhammad Reza Ramlan; Heru Afriansyah; Miranda Roulina
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

The number of passenger automobiles, buses, cargo cars, and motorcyclists on the road in Indonesia continues to rise year after year. According to the Central Statistics Agency, the number of transportation equipment in 2015 was 105,303,318 million, up 6.5 percent from the previous year. In 2016, it was 112,205.711 million, up 6.5 percent. As can be seen from the above, Indonesia's transportation options are expanding throughout time. As a result, the demand for lubricants rises as well. As the need for lubricants grows, so does the amount of spent lubricants that is thrown away. Water absorption is inhibited by used lubricant waste that is disposed of in the soil. Given the aforementioned issues, a solution for converting spent lubricant waste into something more useful, such as liquid fuel, is required. Making a prototype for turning spent SAE 5W-30 lubricant waste into liquid fuel using the hydrocracking method with the help of a Ni/ZAA catalyst is one approach to go about it. The effect of temperature fluctuations of 300 °C, 350 °C, 400 °C, 450 °C, and 500 °C was employed as the independent variable in this investigation. The amount of used lubricant feed used in this investigation is 641.10 ml, which is a fixed variable. The best yield values were obtained at a temperature of 400 °C with a cetane number of 76.2, which met the diesel requirement.

The Impacts of HCl Concentration and Length of Time to Mesocarp in Producing of Bioethanol M. Amir; Leila Kalsum; Yohandri Bow
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 7, No 3 (2022): October 2022
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v7.i3.86

Studies about renewable energy are evolved continuously to decrease the needs of fuel oils that were diminished. One of the alternative energy sources that can be evolved is bioethanol due to the high amount of oxygen component in it hence it can be combustible and eco-friendly. Mesocarp is farming and trading waste of Cocos Nucifera (Coconut) that contains 40% lignin, 44,4% cellulose, and 15% hemicellulose. Delignification is a process of removing lignin from the materials thus it can produce the high purity of cellulose. As long as this, there were numerous studies that researched about lignocellulose biomass, however the least studies researched the impact of using delignification. Thereby, this study was done for figuring out the impact of HCl concentration and length of time to the decreased lignin content and the quality of bioethanol. The points of impacts that being focused on were 1M, 2M, and 3M HCl concentration, whereas the points of length of time impacts were about 60 minutes, 90 minutes, 120 minutes, 150 minutes, and 180 minutes. The decreased lignin content that was obtained is about 18,5% and the finest bioethanol is 97,38 %, 15oC for flash point, 3,8402 cPs for viscosity, and 0,8252 gr/cm3 for density from delignification using 3M HCl for about 150 minutes. Greater HCl concentration to delignification, greater quality of bioethanol that is produced, therefore can be applied to alternative fuel oils for vehicle. Keywords: bioethanol, delignification, HCl, mesocarp

KAJIAN TEMPERATUR DAN WAKTU PROSES TERHADAP RENDEMEN BAHAN BAKAR CAIR PADA KONVERSI LIMBAH PLASTIK DI UNIT THERMAL CRACKING REAKTOR Tahdid .; Erlinawati .; Yohandri Bow; Zakiyah Sri Rezeki; Shela Dilen Putri; Rhevy Liandari
Jurnal Redoks Vol. 7 No. 2 (2022): REDOKS JULI - DESEMBER
Publisher : Universitass PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/redoks.v7i2.9268

Bahan bakar cair hasil konversi sampah plastik merupakan salah satu sumber energi alternatif yang dapat di perbarui serta mampu mengurangi ketergantungan akan energi. Sampah plastic yang digunakan adalah sampah plastic jenis LDPE (Low Density Polyethylene), PP (Polypropylene), dan PET (Polyethylene terephthlate). Metode yang digunakan untuk konversi sampah plastic ini adalah metode pirolisis yang merupakan dekomposisi kimia dengan proses pemanasan dalam kondisi bebas oksigen. Penelitian ini bertujuan untuk mendapatkan rendemen dan kualitas bahanÂ bakar cair yang baik. Bahan bakar yang dihasilkan akan berupa bensin, kerosin atau solar yang akan diuji terlebih dahulu karakteristiknya agar dapat mengetahui jenis bahan bakar hasil pirolisis ini. Dari penelitian menggunakan plastic jenis LDPE ini didapatkan kondisi optimal pada temperature 160áµ’C pada waktu operasi 180 menit dengan %rendemen 94,73%. Setelah dilakukan analisa didapatkan nilai kalor sebesar 11137 Cal/gr, densitas 0,7754 kg/l, titik nyala 20áµ’C dan viskositas 0,663 mm2/s. Untuk plastic jenis PP menghasilkan %rendemenÂ terbanyak didapatkan pada waktu operasi 180 menit dengan temperatur 230oC sebanyak 72,17%, produk yang dihasilkan setelah dianalisa didapatkan nilai densitas 0,7831 kg/l, titik nyala sebesar 19oC, nilai kalor sebesar 11.132 kal/gr dan viskositas 0,6823 mm2/s . Sedangkan hasil dari plastic jenis PET pada kondisi optimal pada temperature 300áµ’C dan waktu 180 menit didapat % rendemen tertinggi yaitu 67,82%, nilai kalor 11018 Cal/gr, densitas 0,7724 kg/l, titik nyala 19áµ’C dan viskositas 0,673 mm2/s. Bahan bakar cair yang dihasilkan dari plastic jenis LDPE, PP, dan PET berdasarkan standarnya dapat diklasifikan sebagai bensin.

Co-Authors ,, Tahdid ., Zurohaina Abdul Razak Abdul Wahid Abu Hasan Abu Hasan Afrianda, Teguh Ahmad Taqwa Aida Syarif AIDA SYARIF Al-Insyrah, Eyza Recwika Ali Ahmad Alwi Nofriandi Anisa, Widya Anwar, Suci Apriani, Akmecia Risqa Arif Budiman Arissetyadhi, Iwan Arizal Aswan Asrizal Audia, Washilla Aulia Asman Ayu Permata Sari Bachty, Hadri Baharuddin Baharuddin BAKHRANI RAUF Bayu Saputra Budiman, Ria Daniar, Rima Darozat, Fajar Mukharom Diah Iswandari Diah Rahmawati Effendy, Sahrul Erlinawati . Fadhlurrahman, M Revanza Fatahul Arifin Fatahul Arifin, Fatahul Fatria Fatria Fatria Febriana, Ida Festiyed Fitri Arsih Gabe, Totop Harjadi Gunawan Harliyani, Ayu Dwi Heru Afriansyah I Nyoman Sila Ibnu Hajar Ichsan Astanto Idham Mahenri Ifdil Ifdil Illahi, Kurnia Indah Purnamasari Isdaryanto Iskandar Jaya Utama Putra Jhora, Fadhila Ulfa Juanta, Palma Kalsum, Leila Kholidah , Nurul Leila Kalsum Leila Kalsum Lety, Trisnaliani Lufri Lufri M. Amir M. Reza Ramlan M. Syahirman Yusi Mahardhika, Lintang Putri Mairizwan, Mairizwan Manggala, Agus Marambang, Alfi Yory Maryam Seyaski Fitria Melta, Defrian Minda Azhar Miranda Roulina Miranda Roulina T Monica, Levia Moyo, Kgomotso Muhammad Agung Muhammad Reza Ramlan Muhammad Taufik Muhammad Yerizam Muhammad Zulfahmi Muharram, Muharram Mustofa Mustofa Najwa, Cholida Nedia Sandika Nofi Yendri Sudiar Novarini, N Pakhrur Razi Prakoso, Dibyo Putra, Andhika Satria Putra, Asri Eka Putra, M. Rizky Adhitya Rahmadina, Nisa RD Kusumanto Reza Angraini Rhevy Liandari Rifa'i, Ahmad Imam Riri Jonuarti Robby Setiadi Robert Junaidi Robiansyah RR. Ella Evrita Hestiandari Rusdianasari Rusdianasari Rusdianasari Rusdianasari Salamah, Luthfia Samosir, Devina Sanchia Santosa, Tomi Apra sari, Desi Nurmala Sari, Mona Sari, Mona Berlian Septiana, Iriani Reka Shela Dilen Putri Siagian, Gunaria Sigit Kurniawan Sirajuddin Skunda Diliarosta Sofianora, Aulia Suaidi Ahadi Sundari, Okta Sutini Pujiastuti Lestari Sutini Pujiastuti Lestari Suyanta Suyanta Syakdani, Adi Tahdid . Thamrin Thamrin Tresna Dewi Wibby Aditya Putra Utama Widiartha, Wahyu Dewa Winiasri, Linda Wiranata, Muhammad Adithia WULANDARI, NILA Yenni Darvina Yerimadesi Yerimadesi Yulifarma, Rika Yulkifli Yulkifli Yusi, Syahirman Zakiyah Sri Rezeki Zikri, Ahmad Zulhendri Kamus Zulma, Degito Zulyusri Zulyusri

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