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All Journal JURNAL NASIONAL TEKNIK ELEKTRO PROtek : Jurnal Ilmiah Teknik Elektro Rang Teknik Journal JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI BATIK: Jurnal Pengembangan dan Pengabdian Masyarakat Multikultural Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering)
Jelita, Marhama
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Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Public Health Social Sciences Other

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Pelatihan Publikasi Artikel Pada Jurnal Nasional Terakreditasi Fitri, Irma; Irma, Ade; Saleh, Habibis; Jelita, Marhama
Jurnal Pengembangan dan Pengabdian Masyarakat Multikultural Vol 2 No 1: BATIK April 2024
Publisher : Institut Riset dan Publikasi Indonesia (IRPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/batik.v2i1.1359

Abstract

The community service initiative was initiated after conducting in-depth interviews and widespread questionnaire surveys. These investigations revealed a issue: many educators are unable to get promoted due to their limited proficiency in composing scientific articles. To effectively overcome these issues, it is essential to address them immediately. The main aim of this program is twofold: firstly, to improve educators' comprehension of the functional promotion process, and secondly, to elevate their proficiency in creating scientific articles. The initiative took place in Pekanbaru, involving a group of 16 junior high school teachers Madani. After training program, every participating teacher is now able to skillfully write scientific articles. While these articles have not yet reached the publication stage, it is noteworthy that educators have acquired the essential knowledge and skills necessary for the successful submission of scientific articles to reputable journals and proceedings. The team implementing this service conducted an evaluation to find out teacher perceptions by distributing questionnaires to find out teacher responses regarding the process of writing scientific articles. The results of the evaluation showed that the demands of working hours and other administrative work consumed a lot of time that could have been used by teachers to write. In addition, lack of motivation was also identified as a factor that hinders the process of writing scientific articles.
Analisis Potensi dan Evaluasi Emisi Biodiesel dari Palm Oil Mill Effluent Hariyadi, Tiara Puja; Jelita, Marhama
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 2 (2024): May 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i2.2754

Abstract

The substantial development of the palm oil industry in Indonesia is evident in the high production of Crude Palm Oil (CPO) as the primary product and Palm Oil Mill Effluent (POME) as a byproduct in palm oil mills. POME waste contains emissions that can harm the environment, necessitating proper waste management. This issue can be addressed by transforming the waste into biodiesel, as it still contains Free Fatty Acids (FFA) and triglycerides. The utilization of biodiesel can reduce the reliance on fossil fuels and environmental pollution. The research aims to evaluate the quality of biodiesel based on the SNI 7182:2015 standard, considering parameters such as Free Fatty Acid (FFA), acid value, density, water content, and viscosity through experimental processes involving sulfuric acid esterification and basic catalyst transesterification. The study is expected to provide information on the potential of biodiesel as a vehicle fuel and energy source for colt diesel engines, along with an emission analysis during the transition from biodiesel to solar. The biodiesel produced meets the standards for FFA (0.26%), acid value (0.57 mg/KOH), and density (0.871 g/ml). The waste volume of 490 m3/day generates 5,096 liters/day of biodiesel, sufficient for 23 units of colt diesel engines with 55% efficiency, producing an energy output of 988,902.91 J. The transition to biodiesel fuel can reduce CO2 emissions by 20.4%, NOx by 50%, and HC by 40%.Keywords – Biodiesel, POME, Renewable Energy, Esterification
Analisis Potensi Energi Listrik dari Biogas Campuran Sampah Daun Ketapang dan Tinja Kerbau Falmansyah, Muhammad Ridho; Jelita, Marhama
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 2 (2024): May 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i2.2821

Abstract

Leaf and twig waste accounts for 12.99% of Indonesia’s waste problems. One of the fertile plants that can produce 10 kg of leaf waste per day for an area of 1200 m3 is the ketapang tree. The ketapang tree has leaf waste that has the potential to become biogas through the fermentation process but produces a small amount of biogas, so the increase is done by mixing buffalo feces. Fermentation of a mixture of ketapang leaf waste and buffalo feces using a Batch-type digester by comparing using starter and non-starter to produce potential biogas and electrical energy. In the fermentation process of the mixture of ketapang leaf waste and buffalo feces, the temperature of the non-starter digester ranges from 26.3-32.6 °C and the starter 26.3-33 °C, the pH of the non-starter digester is in the range of 6.4-6.9 while the starter is 5.8-6.6. Biogas production generated from a mixture of ketapang leaf waste and buffalo work feces for non-starter is 0.00465 m3 and starter 0.0028 m3 with potential electrical energy generated non-starter 0.022 kWh and starter 0.013 kWh. Biogas and electrical energy production from a mixture of ketapang leaf waste and buffalo feces with non-starter is higher than using a starter.Keywords - Biogas, Ketapang Leaf Waste, Buffalo Feces, Starter, Electrical Energy.
Analysis of Bio-briquette Electrical Energy from The Utilization of Combustion Ash in A Boiler Furnance (Ash Boilers) PKS PT. ADEI PLANTATION & INDUSTRY, MPOM Prayetno, Tansyah; Jelita, Marhama
PROtek : Jurnal Ilmiah Teknik Elektro Vol 11, No 2 (2024): Protek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v11i2.7174

Abstract

PT. ADEI PLANTATION INDUSTRY is a palm oil processing factory that has a plantation area of 11,047 hectares. This factory produces solid and liquid waste. solid waste is reused as boiler fuel and liquid waste is used for biogas. Combustion in the boiler produces boiler ash, 70% of which is used as organic fertilizer and the remaining 30% is simply thrown away. This research aims to utilize boiler ash waste in bio-briquettes and determine the electrical energy potential of bio-briquettes using the carbonization combustion method in boiler furnaces (boiler ash). The test results for the calorific value of bio-briquettes from the use of residual ash from combustion in boiler furnaces (boiler ash) were 2,214.99 cal/gr. From 1 kg of boiler ash, 11 pieces of bio-briquettes weighing 100 gr/piece, with a calorific value of 24,364 cal/gr, are produced. PT. ADEI PLANTATION INDUSTRY in one day produce 7,536 tons of boiler ash, which will produce 82,896 pieces of bio-briquettes with a heating value of 179,903,776 cal/gr, a total flow rate of heat energy of 792,020 Watts and electrical energy of 950,424 kWh. From the PLTU efficiency of 5.12%, the potential electrical energy produced in one month is 28,512,720 kWh with 188.4 tons of boiler ash and 2,261 tons of boiler ash in 1 year has the potential to become 346,904,760 kWh of electricity. The electrical energy potential of bio-briquettes can meet the needs of 70% of the electricity load at PT. ADEI PLANTATION INDUSTRY, MPOM
Comparative Analysis of Electrical Energy Potential from Coconut Dregs Biobriquettes Using the Pyrolysis Method with Biomass and Direct Burning Types Sutanto, Bintang; Jelita, Marhama
PROtek : Jurnal Ilmiah Teknik Elektro Vol 11, No 2 (2024): Protek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v11i2.6923

Abstract

Riau is the province that produces the largest coconut in Indonesia, in 2019 coconut production in Riau reached 417,172.00 tons / year with coconut production of that amount producing a lot of waste as well, one of which was coconut pulp waste of 56,943 tons. If left alone, coconut pulp waste can have a negative impact on the environment. The purpose of this study is the use of coconut pulp waste as biobriquettes and the potential of electrical energy generated in Riau. The method of making biobriquettes uses the Pirolysis method with different types of combustion, namely biomass combustion and direct combustion, the results of this study are experiments conducted from 500 grams of coconut pulp to produce biobriquettes in biomass combustion which is 360 grams and in direct combustion of 240 grams. Characteristic testing is carried out manually, using biomass stoves and biobriquettes as fuel. Biomass combustion is obtained calorific value of 229.16 cal / gram, thermal efficiency of 7%, electrical energy conversion of 0.26655 kWh and electrical energy produced in Riau Province in 2019 which is 173,432,957.3 kWh. Meanwhile, direct combustion obtained a calorific value of 216.6 cal / gram, thermal efficiency of 6%, electrical energy conversion of 0.2518 and electrical energy in Riau province of 109,314,879.6 cal / gram. It can be concluded that biomass combustion is better than direct combustion. 
Comparative Analysis of the Quality and Electrical Energy of Wood Waste Briquettes with Natural (Starch) and Synthetic Adhesives (Synthetic Rubber Adhesive) Arnando, Vito; Jelita, Marhama
PROtek : Jurnal Ilmiah Teknik Elektro Vol 11, No 2 (2024): Protek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v11i2.7153

Abstract

On average, small and medium-scale wood processing industries produced at least 2 to 4 cubic meters of wood a day, this production produced 0.25 to 2 m3 of wood waste a day. In fact, this waste can be used as a renewable energy source by processing it into briquettes. This research will produce wood waste briquettes using the pyrolysis method from two types of adhesive, namely starch and synthetic rubber adhesive with a composition ratio of 3:1. Apart from that, the resulting briquettes were tested using a bomb calorimeter to obtain the calorific value, water content, ash content, and volatile matter content, and then compared with the SNI 01-6235-2000 standard. The resulting briquettes were then calculated using mathematical calculations for the potential electrical energy they could generate. From laboratory tests, the calorific value, water content, ash content, and volatile matter content of natural adhesive briquettes were obtained at 5194.44 cal/g, 11.3%, 1.36%, and 40.8%, while synthetic adhesive briquettes respectively had values of 6369.46 cal/g, 4.33%, 2.74%, and 25.54%. From these results, synthetic adhesive briquettes had better calorific value, water content, and volatile matter content compared to natural adhesive briquettes. Apart from that, synthetic adhesive briquettes also had greater energy potential with an energy potential of 7,407 kWh/kg compared to briquettes with natural adhesives which only had a value of 6,041 kWh/kg. Thus it can be concluded that synthetic adhesive briquettes are better quality compared to natural adhesive briquettes because they can generate greater energy, and meet 3 of the 4 test parameters based on SNI while natural adhesive briquettes only meet 2 of the same 4 test parameters
Potential Utilization of Flue Gas Using Organic Rankine Cycle (Study Case PLTMG Balai Pungut-Duri) Triyanti, Riska; Jelita, Marhama
PROtek : Jurnal Ilmiah Teknik Elektro Vol 11, No 1 (2024): PROtek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v11i1.6270

Abstract

PLTMG Balai Pungut-Duri is one of the largest gas engine type power plants in Riau with a capacity of 7x16 MW. The efficiency produced by the Balai Pungut-Duri PLTMG is 38% with the standards set by PT. PLN Efficiency in this type of generator is 45-47.5%. One of the factors that causes a reduction in the value of efficiency in power plants is that energy is converted into work and some is wasted, one of which is energy from flue gas. The purpose of this study is to examine the potential for utilizing flue gas using the Organic Rankine Cycle (ORC). The method used in this study is the law of thermodynamics 1 to determine the parameter values needed to determine the efficiency and power generated using the Engineering Equation Solver software. From the results of the calculations carried out, the Balai Pungut PLTMG produces an efficiency of 38.49% and a power of 14,530 kW under excited conditions. In utilizing flue gas using an organic rankine cycle it produces an efficiency of 19.97% with a power of 4,556 kW. the combined efficiency that can be produced by PLTMG Balai Pungut-Duri is 50.56% with a total power of 19,086 kW, with an efficiency increase of 12.07%. The results of the study show that the use of flue gas energy can increase efficiency according to PLN standards.
Improving Solar Cell Efficiency PV/T Using NEPCM by FEM Method Adriana, Syarifah; Jelita, Marhama
JURNAL NASIONAL TEKNIK ELEKTRO Vol 14, No 1: March 2025
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jnte.v14n1.1306.2025

Abstract

Energy generated from photovoltaic (PV) systems is often wasted, with about 80% converted to heat and only 20% converted to electricity. This indicates the need for further research to improve the energy conversion efficiency in PV systems. This study aims to analyze the cell efficiency and power generation in a photovoltaic-thermal (PVT) system with variations in nano-encapsulated phase change material (NEPCM) concentration and reservoir thickness. The developed PVT configuration includes a photovoltaic cell layer, a thermal paste layer, a reservoir wall, and a channel filled with nanofluid containing NEPCM surrounded by a protective shell.  The research method involves simulation using the Finite Element Method to measure system performance regarding energy conversion efficiency, with encapsulated PCM concentration variations at 2%, 10%, and 20%. Additionally, the laminar flow velocity used is 0.5 m/s under steady-state conditions, and the thickness of the PCM material used is 1 mm and 15 mm. The results show that increasing the NEPCM concentration by 5% can improve the electrical and thermal performance of the system by more than 50%. In addition, variations in reservoir thickness also contribute to the overall efficiency. This study concludes that the proposed PVT configuration can improve energy efficiency and optimize thermal management in the system, making it an effective solution for developing renewable energy technologies. Thus, implementing NEPCM in PVT systems can significantly contribute to overall energy efficiency.
POTENSI BIOGAS DARI CAMPURAN JERAMI PADI DAN KOTORAN AYAM PADA SUHU MESOFILIK DAN TERMOFILIK DENGAN RASIO C/N IDEAL Gani, M Afdol; Jelita, Marhama
Rang Teknik Journal Vol 8, No 2 (2025): Vol. 8 No. 2 Juni 2025
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v8i2.6263

Abstract

This research aims to optimize the utilization of rice straw waste into biogas by mixing chicken manure to achieve an ideal C/N ratio of 30. The method used in the anaerobic fermentation process uses SuperPro Designer software simulation and compares good biogas production from mesophilic temperatures (350C) and thermophilic (550C). The results of the research show that 4,000 kg of rice straw used to achieve a C/N ratio of 30 requires a mixture of 1,455 kg of chicken. Biogas potential from a mixture of rice straw and chicken manure with a C/N ratio of 30 at a temperature of 55°C produces the highest volume of biogas, reaching 617,887 m³, with a methane content of 81.83%. The increase in biogas yield of 20.15% at thermophilic temperatures compared to mesophilic temperatures shows that high temperatures increase the efficiency of biogas production. This research found the potential of rice straw as a sustainable biogas raw material with a C/N ratio of 30 with a thermophilic temperature that influences biogas production and the electrical energy produced.Keywords: Rice Straw, C/N Ratio, Temperature, Biogas
Effect of Tilt Angle on Solar Cell Efficiency and Electrical Energy of Nanofluid Filled Photovoltaic-Termal (PV/T) Systems Ananda, Fadilla; Jelita, Marhama
Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Vol 12 No 1 (2025): Jurnal Ecotipe, April 2025
Publisher : Jurusan Teknik Elektro, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jurnalecotipe.v12i1.4547

Abstract

This study aims to analyze the effect of nanofluid concentration and panel tilt angle variation on photovoltaic-thermal (PV/T) system efficiency using numerical simulation with the Finite Element Method (FEM). The results showed that the optimal nanofluid concentration of 20% resulted in an even distribution of fluid flow, while increasing the concentration to 20% at an inclination angle of π/6 decreased the PV cell temperature, increased the photovoltaic efficiency to 12.04%, and the best electrical power of 36.71 W. The highest thermal efficiency of 69.5% was achieved at a concentration of 20% with an inclination angle of π/6, while the highest total efficiency of 81.7% was achieved at an inclination angle of π/3. The optimal combination of nanofluid concentration and tilt angle was shown to significantly improve the energy efficiency of the PV/T system, making an important contribution to the development of more efficient renewable energy technologies.
Co-Authors Ade Irma Adriana, Syarifah Ananda, Fadilla Arnando, Vito Falmansyah, Muhammad Ridho Gani, M Afdol Habibis Saleh Hariyadi, Tiara Puja Irma Fitri, Irma Prayetno, Tansyah Sutanto, Bintang Triyanti, Riska