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All Journal International Journal of Renewable Energy Development POSITRON Teknika Jurnal Fisika Unand Indonesian Journal of Chemical Analysis (IJCA) Indonesian Journal of Electrical Engineering and Computer Science Tekper: Jurnal Teknologi dan Manajemen Industri Pertanian REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Hydrogen: Jurnal Kependidikan Kimia Jurnal Ilmiah Wahana Pendidikan Jurnal Teknologi Kimia Unimal Jurnal Rekayasa elektrika Jaliye: Jurnal Abdimas, Loyalitas, dan Edukasi Journal Of Chemical Process Engineering Jurnal ELTEK
Hakim, Muhammad Fahmi
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Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Social Sciences Other

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Enhancement of Hybrid SPEEK Based Polymer–Cyclodextrin-Silica Inorganic Membrane for Direct Methanol Fuel Cell Application Kusworo, Tutuk Djoko; Hakim, Muhammad Fahmi; Hadiyanto, H
International Journal of Renewable Energy Development Vol 6, No 2 (2017): July 2017
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.6.2.165-170

Abstract

Direct methanol fuel cell (DMFC) is one of several types of fuel cells that use proton exchange membrane  (PEM) as a liaison between the reaction at the cathode and anode. Polyether-ether ketone (PEEK) is one of the aromatic polymer that can be applied in DMFC because of its characteristics that are resistant to DMFC environment. The polymer is also quite easy in the sulfonation process using concentrated sulfuric acid. However the role of polyether-ether ketone as DMFC membrane material is still lack of advantage due to its low conductivity and therefore the modification is required to increase the value of proton conductivity of the membrane. The purpose of this experiment is to modify the membrane (sPEEK) with the addition of cyclodextrins-silica, additive variation charge of 2%, 6% and 10%, time and temperature were fixed at 4 hours and 65oC. The results showed the best results of membrane sPEEK was obtained at the addition of -cyclodextrin -silica 10% with the membrane characteristics of ion exchange capacity of 2.19 meq / g polymer, the degree of sulfonation of 81%, methanol permeability of 3.09 x 10-9 cm2 / s and water uptake membrane of 64%.Article History: Received January 18th 2017; Received in revised form April 21st 2017; Accepted June 22nd 2017; Available onlineHow to Cite This Article: Kusworo, T.D., Hakim, M.F. and Hadiyanto, H. (2017) Enhancement of Hybrid SPEEK Based Polymer–Cyclodextrin-Silica Inorganic Membrane for Direct Methanol Fuel Cell Application. International Journal of Renewable Energy Development, 6(2), 165-170.https://doi.org/10.14710/ijred.6.2.165-170
Mechanical Characteristics of Plastic Films Made from Potato Peel Waste (solanum tuberosum L.) with Variations of Acetic Acid and CMC Rahmawati, Fira; Hakim, Muhammad Fahmi; Ni’mah, Kamilah Pathun
Tekper : Jurnal Teknologi dan Manajemen Industri Pertanian Vol 4, No 3 (2023):
Publisher : Jurusan Ilmu dan Teknologi Pangan, Fakultas Pertanian,

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/tekper.v4i3.45193

Abstract

West Java produces 1,3 thousand million tons of plastic waste per year. Synthetic plastics have component materials that are not environmentally friendly and can decompose for 20 years, therefor handling is required to overcome the accumulation of plastic waste. 3R (reduce, reuse, recycle) is applicable way example using plastic materials that are easily decomposed. Starch in potato skins can be used as a material for bioplastics components, the purpose of this research is to make plastic films made from potato peel waste (Solanum tuberosum L.), as an alternative natural polymer to alternate petroleum materials. Various concentrations of acetic acid (1% and 2%) and variations of carboxymethyl cellulose (1,5 gr and 2,1 gr) were added to the samples and two repetitions, the result of all is 10 samples. Firstly the potato skins were extracted to extract the starch, then the starch was dried at 40 oC for 8 hours. The procedure for making plastic film is to mix the raw materials and gelatinization at 70 oC for 120 minutes. The plastic film is shaped, dried and finally, it does a mechanical test. The research shows that variations of acetic acid and CMC can increase the mechanical properties of tensile strength, elongation at break, thickness, and water uptake. The best plastic film composition was produced using 1% acetic acid and 2,1 gr CMC. The sample has a tensile strength value of 15,72 N/mm2, elongation at break of 14,29%, thickness of 146,17 µm, and water absorption of 365%.
Perbandingan kinerja beberapa lampu LED cerdas Hakim, Muhammad Fahmi; Syamsiana, Ika Noer; Prasojo, Rahman Azis
JURNAL ELTEK Vol. 19 No. 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/eltek.v19i2.310

Abstract

Beberapa waktu terakhir terdapat sebuah teknlogi baru dari lampu LED, yaitu lampu LED cerdas. Sudah cukup banyak penelitian tentang perbandingan performa lampu LED dengan lampu jenis lainnya, namun belum ada penelitian tentang perbandingan kinerja antar merk lampu LED cerdas. Berdasarkan hal tersebut maka dilakukan analisis pengaruh warna cahaya dan tingkat kecerahan terhadap kuat penerangan lampu serta pengaruh tingkat kecerahan terhadap penggunaan energi, daya, faktor daya, tegangan, dan arus pada sembilan merek lampu dengan daya yang sama. Didapatkan hasil lampu Merek A mempunyai unjuk kerja yang lebih baik jika dibandingkan lampu merk lain. Hal ini dikarenakan lampu Merek A mempunyai nilai kuat penerangan yang paling baik di antara merk lampu lainnya pada kedua warna cahaya. Selain itu kuat penerangan lampu Merek A tidak terlalu terpengaruh dengan penurunan tingkat kecerahan. Namun, penggunaan energi listrik pada lampu merek A relatif konstan meskipun tingkat kecerahan diturunkan. ABSTRACT Recently, there has been a new technology for LED bulb, namely smart LED bulb. There have been many studies on comparing the performance of LED bulb with conventional bulb, but there has been no research on performance comparisons between brands of smart LED lamps. Based on this, an analysis of the effect of light color and brightness level on bulb illumination and the effect of brightness level on the use of energy, power, power factor, voltage, and current on nine brands of bulbs with the same power was carried out. The results obtained that A bulb have better performance when compared to other bulbs. This is because A bulbs have the best illumination value among other bulbs in both light colors. In addition, the illumination of the A bulb is not too affected by the decrease in the brightness level. However, the use of electrical energy in A bulb is relatively constant even though the brightness level is lowered.
Effect of Doping Density and Parasitic Resistances on The Performance of Perovskite Solar Cells-based Graphene Oxide as Hole Transport Layer by SCAPS-1D Fauji, Najmudin; Kardiman, Kardiman; Suci, Farradina Choria; Hakim, Muhammad Fahmi; Efelina, Vita; Widianto, Eri
POSITRON Vol 14, No 2 (2024): Vol. 14 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v14i2.74606

Abstract

Perovskite solar cells (PSCs) have demonstrated remarkable improvement and promise to be produced as large-scale, low-cost devices. Several resistive losses, such as the loss current, the trapping, and the recombination of charge carriers, significantly inhibited the performance of PSCs. Typically, the series resistance (RS) and shunt resistance (RSH) of the devices influence these kinds of losses. In this study, we conduct a simulation analysis to investigate the effect of doping density and parasitic resistances (RS and RSH) on the performance of PSCs-based graphene oxide (GO) as a hole transport layer (HTL) using the SCAPS-1D. The doping density variations in HTL demonstrate improved power conversion efficiency (PCE) and fill factor (FF) as the doping density increases. Both RS and RSH significantly affect the PSC performance, as they control the shape and slopes of the current density (J-V) characteristic. The optimization method produced impressive results, including an open-circuit voltage of 0.94 V, a short-circuit current density of 22.51 mA.cm−2, a fill factor of 78.92%, and a power conversion efficiency of 16.75%. This study leads to a basic understanding of the physics of PSC devices. The proposed design provides a systematic analysis method for photovoltaic science and technology.
Implementation of Insect Pest Control Innovation with Raindrop Sensor using Solar Energy Source in Shallots Farming Prasojo, Rahman Azis; Fahad, Waris Malik; Nadila, Dilavinsa Indar Putri; Duanaputri, Rohmanita; Hakim, Muhammad Fahmi; Sungkowo, Heri; Handani, Galuh Prawestri Citra
REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Vol 5, No 3 (2024): REKA ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaelkomika.v5i3.209-218

Abstract

Spodoptera exigua, commonly known as the beet armyworm, is a major pest affecting shallot (Allium ascalonicum L.) plants, leading to significant damage and economic losses for farmers. Traditional pest control methods, such as manual caterpillar removal and pesticide application, have proven ineffective and costly. In response, this study aims to develop an environmentally friendly and sustainable solution by designing a pest control system powered by solar energy, equipped with high-voltage wires, UV lamps, and a raindrop sensor for automatic operation. The system works by converting solar energy into electrical power, which then supplies the pest control unit. The UV lamps attract moths, while the high-voltage wire eliminates them. A raindrop sensor is used to ensure the system operates efficiently by shutting off during rainfall. The method involved discussions with local farmers, design and assembly of the device, followed by field implementation and monitoring in shallot farms. The results show that the device successfully trapped between 40 to 80 moths per day, significantly reducing pest populations and lowering production costs for farmers, as the use of chemical pesticides was minimized. Additionally, the quality of shallot crops improved, leading to higher market value. The solar-powered pest control system is an effective, eco-friendly alternative for managing pest infestations in shallot farming. It offers a cost-efficient solution, reducing the need for pesticides while improving crop quality and yield.
Transformer oil degradation detection system based on color scale analysis Hakim, Muhammad Fahmi; Prasojo, Rahman Azis; Duanaputri, Rohmanita; Wijaya, Bustani Hadi; Fidya Amaral, Hanifiyah Darna; Emzain, Zakki Fuadi
Indonesian Journal of Electrical Engineering and Computer Science Vol 37, No 1: January 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v37.i1.pp15-25

Abstract

The rise in power transformer load results in degradation of the condition of the transformer oil and ultimately a deficiency in the distribution of electrical energy. This degradation can be slowed down by reconditioning transformer oil based on oil color detection. This research aims to design, test and validate a transformer oil color testing system based on color sensor and microcontroller. To obtain an accurate system, tests were carried out on selecting the types of sensors, the color of the chamber walls, and the shapes of transformer oil sample vessel used. The oil color scale of the samples was determined visually according to the ASTMD1500, 2009 standard as a benchmark. The test results showed that the TCS3200 color sensor was able to detect the color of all transformer oil samples. White chamber wall and test tube as oil sample containers were chosen to increase system accuracy. Overall, the system is able to detect the color of transformer oil, convert to the ASTMD1500, 2009 standard transformer oil color scale, determine the condition of the transformer oil and conclude the level of transformer oil degradation according to CIGRE-761, 2019. Validation results showed the system had an accuracy level of 92.65%.
IoT-based Monitoring System for Energy Consumption Costs from Battery Supply Hakim, Muhammad Fahmi; Kusuma, Wijaya; Suudi, Ismail; Ridzki, Imron; Setiawan, Awan; Syamsuri, Tresna Umar
Jurnal Rekayasa Elektrika Vol 20, No 4 (2024)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v20i4.35237

Abstract

A battery must be monitored in real-time to ensure it meets its designed lifetime. Additionally, energy costs from the battery supply must be calculated and controlled to enable solar power plant entrepreneurs to profit practically. This project aims to develop an IoT-based monitoring and controlling system for battery conditions, especially energy consumption costs from battery supply. This system uses an ESP32 microcontroller, INA219 sensor, single channel 5 VDC optocoupler relay, and OLED display. The ESP32 processes the current and voltage from the INA219 sensor and then displays on the OLED display. The parameters displayed include consumed energy costs, current, voltage, power, consumed energy, and used battery capacity. Data is also sent to the Blynk website using IoT, allowing these parameters to be monitored in real time. Based on test results, the average error in calculating energy costs is 0.046%, and other measured or calculated parameters are below 1%. This system can also turn the power flow to the load on and off using the Blynk platform. It can be concluded that the system works well, enabling IoT-based monitoring and control of battery parameters.
Analisis Derajat Deasetilasi Kitosan dari Limbah Cangkang Rajungan dengan Penambahan Variasi NaBH4 dan Suhu Fatin, Ainiyyah; Salsabilla, Aina; Winarto, Adi Putra; Hakim, Muhammad Fahmi
Jurnal Ilmiah Wahana Pendidikan Vol 10 No 20 (2024): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14257788

Abstract

Indonesia has a large potential for marine products, namely blue swimming crab. In general, only the part of the crab is processed into food, so crabs have the potential to produce shell waste. So that the use of crab shell waste can be made into chitosan which is done using two approaches, namely providing quality standard values and high selling prices. In the manufacture of chitosan consists of 3 stages, namely (1) Deproteination stage using 3.5% NaOH at 80℃; (2) Demineralization step using 1 N HCl at 30℃; (3) Deacetylation step using 60% KOH solution with the addition of NaBH4 (0.50; 0.75; 1 gram) and temperature (100℃, 110℃, 120℃) with a stirring time of 2.5 hours. From the results of the research that has been done, the best degree of deacetylation was obtained when the addition of 0.75 gram NaBH4 was 73.65% at 120℃. The characteristics of chitosan in the yield with the best 4.25% at 100℃ with the addition of 1 gram of NaBH4. The water content with the best is 5.15% at 110℃ with the addition of 0.75 gram NaBH4. And the ash content with the best is 1.747% at 120℃ with the addition of 0.75 gram NaBH4
Studi Penerapan Ekstrak Eceng Gondok Sebagai Inhibitor Korosi Pada Pipa Baja Karbon Dalam Medium Korosi Air Laut dan Air Hujan Dengan Variasi Suhu Nuringsih, Fadhilla Maharani; Prasojo, Ikhwan Mahendra; Ratnasari, Yuki; Hakim, Muhammad Fahmi
Jurnal Ilmiah Wahana Pendidikan Vol 10 No 22 (2024): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14565979

Abstract

Corrosion is a decrease in the quality of metal due to electronic reactions with its environment or in general it is better known as rusting. When viewed from a chemical perspective, corrosion is a metal reaction that is in direct contact with the environment and oxygen. Corrosion cannot be eliminated, but it can be controlled. So controlling the corrosion rate using organic or inorganic based corrosion inhibitors is appropriate. This research used grade 5L carbon steel pipes and looked at the effect of water hyacinth extract on the corrosion rate. In this research, it was proven that water hyacinth extract contains tannins and saponins which can inhibit the optimal corrosion rate at an extraction temperature of 85ºC. The SEM test in this study showed that the steel pipe samples immersed in the corrosion inhibitor medium had a smoother surface compared to the corrosion medium without inhibitors.
Study On The Application Of Red Dragon Fruit Peel Extract As An Organic Corrosion Inhibitor On Carbon Steel Pipes In Corrosive Mediums Of Seawater And Rainwater With Varying Extraction Temperatures Prasojo, Ikhwan Mahendra; Nuringsih, Fadhilla Maharani; Hakim, Muhammad Fahmi
Jurnal Ilmiah Wahana Pendidikan Vol 10 No 22 (2024): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14574670

Abstract

Corrosion cannot be avoided, and its presence is a concern in the chemical industry as it can disrupt processes, mainly because process equipment is commonly made of steel pipes. This necessitates the control of corrosion rates using corrosion inhibitors, whether organic or inorganic. The use of organic inhibitors is more environmentally friendly as it does not produce negative impacts on the environment, requires low costs in procurement, and is simpler in its treatment processes. One potential organic inhibitor is the extract from red dragon fruit peel waste. The extract is obtained through the maceration extraction process using 96% ethanol with temperature variations of 80, 85, and 90 ℃. Subsequently, sample immersion is carried out in seawater and rainwater medium. The results of this research indicate that red dragon fruit peel extract contains flavonoids and saponins that can optimally inhibit the corrosion process at an extraction temperature of 85 ℃. SEM tests show that metal samples immersed in the corrosion medium with the inhibitor have a smoother surface compared to those in the
Co-Authors Aeni, Alfieta Rohmaful Aini, Alfieta Rohmaful Alfiludin, Kamila Allifiantika, Nindya Amaral, Hanifiyah Darna Fidya Andinnawati, Widya Awan Setiawan Dampang, Sarah Dessy Agustina Sari Efelina, Vita Fahad, Waris Malik Fatin, Ainiyyah H Hadiyanto Handani, Galuh Prawestri Citra Hartanti, Adelia Hutama, Dimas Ekaditya Iskandar, Riska Listiarini Julia Putri, Leggy Doriyanti Kardiman, Kardiman Karimah, Syafa Nurul Kurnia, Ratna Mahendra, Bhisma Nadila, Dilavinsa Indar Putri Najmudin Fauji Ni'mah, Kamilah Pathun Ni’mah, Kamilah Pathun Ni’mah, Kamilah Pathun Nuringsih, Fadhilla Maharani Oktaviandy, Nadya Rachma Perdani, Meka Saima Prasojo, Ikhwan Mahendra Prasojo, Rahman Azis Putri, Leggy Doriyanti Julia Rahmawati, Fira Ratnasari, Yuki Ridzki, Imron Rohmanita Duanaputri Rumira, Mayda Su’ad Salsabilla, Aina Siswadi Siswadi Siswantito, Firgi Suci, Farradina Choria Sugiarto, Amalia Rizka Sungkowo, Heri Suryadi, Cahya Suudi, Ismail Syamsiana, Ika Noer Syamsuri, Tresna Umar Tutuk Djoko Kusworo Ujiburrahman, Ujiburrahman Wahyudi, Mohamad Nur Widianto, Eri Wijaya Kusuma Wijaya, Bustani Hadi Winarto, Adi Putra YULIASARI, FITRI Zakki Fuadi Emzain