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Armansyah Halomoan Tambunan
Departmen Teknik Mesin Dan Biosistem, Institut Pertanian Bogor, Kampus IPB Darmaga, Bogor 16002 Email: Lpmanalu@yahoo.com, Ahtambun@ipb.ac.id
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Alternatif Solusi Penyediaan Sumber Energi Listrik Studi Kasus: Kabupaten Kupang Rusman Sinaga; Armansyah Halomoan Tambunan; Prastowo Prastowo; Bintang Charles Hamonangan Simangunsong
Jurnal Keteknikan Pertanian Vol. 5 No. 3 (2017): JURNAL KETEKNIKAN PERTANIAN
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1814.392 KB) | DOI: 10.19028/jtep.05.3.283-290

Abstract

AbstractKupang is one of the districts in Indonesia which has low electrification ratio that is about 60%. There are still 32 out of 177 villages having no access to Electrical Energy Sources (EES) supply. It means that there are 30,910 out of 78,011 households without access to electricity supply. The barriers for supplying the electricity were the difficulties to reach the location due to its geographical conditions. This research was aimed to analyze and select the appropriate electrical power system for using the available primary energy resources in the rural area of Kupang district, bounded with three criteria, namely environmentally friendly, efficient, and effective. The results of Analytical Hierarchy Process of the alternative solutions to the provision of EER in Kupang district found that the first option is the solar photovoltaic power system/PLTS (41%), the second option is wind power system/PLTB (27.5%), the third option is microgrid power system/ MG (20.8%) and the fourth is hybrids power system/PLTH (10.8%). AbstrakKupang merupakan salah satu Kabupaten di Indonesia yang memiliki rasio elektrifikasi yang rendah yaitu sekitar 60%. Di Kabupaten Kupang masih terdapat 32 dari 177 desa yang belum mendapatkan pasokan Sumber Energi Listrik (SEL). Hal ini berarti bahwa 30,910 dari 78,011 rumah tangga belum mendapatkan pasokan listrik. Kendala utama pemasokan SEL adalah kondisi georafis yang sulit dijangkau. Tujuan penelitian ini adalah untuk menganalisis dan memilih sistem tenaga listrik untuk penyediaan SEL sesuai dengan sumberdaya energi primer yang dimiliki perdesaan dengan tiga kriteria antara lain ramah lingkungan, efisien dan efektif. Hasil Proses Hirarki Analitik solusi alternatif untuk penyediaan SEL di Kabupaten Kupang ditemukan bahwa pilihan pertama adalah sistem tenaga surya fotovoltaik/PLTS (41%), pilihan kedua adalah sistem tenaga angin/PLTB (27.5%), opsi ketiga adalah sistem microgrid/MG (20.8%) dan yang keempat adalah sistem tenaga hibrida/PLTH (10.8%).
Kajian Efek Medan Elektromagnet terhadap Karakteristik Semburan Bahan Bakar Solar, Biodiesel dan Campuran Keduanya Tatun Hayatun Nufus; Wawan Hermawan; Radite Praeko Agus Setiawan; Armansyah Halomoan Tambunan
Jurnal Keteknikan Pertanian Vol. 6 No. 1 (2018): JURNAL KETEKNIKAN PERTANIAN
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1282.811 KB) | DOI: 10.19028/jtep.06.1.99-106

Abstract

AbstractResearch on optimization of diesel engine fuel have been conducted, among other, by utilizing the electromagnetic field. To prove that by using the electromagnetic field of the combustion process to be optimal among them is to analyze the character of atomization. The purpose of this research was to analyzethe effect of fuel magnetization on the fuel spray pattern. Experiments were conducted using several fuel including diesel fuel, mixtures of diesel fuel and biodiesel of 10%, 40%, 70%, and biodiesel. Before the spraying test, the fuel was exposed to strong electromagnetic field with variation of wound coil 5000-9000 winding (876-1300 Gauss) for 5 minutes. The spraying test used an injector tester at a pressure of 14.7 Mpa. The spray was observed using a high-speed camera. It was appeared that the larger magnetic field applied to the fuel caused the viscosity to fall in the range of 5-15%, increasing the angle of the sprays or widespread area of the bursts in the range of 3.5-12%, and the particle size of the bursts becomes smaller by 0.2916-0.975 nm. This information is considered to be useful for further research in order to resolutely clarify the phenomenon of efficient combustion process of fuel after exposure to magnetic field.AbstrakBerbagai penelitian tentang pengoptimalisasian bahan bakar motor diesel telah banyak dilakukan, salah satunya dengan memanfaatkan medan elektromagnet. Untuk membuktikan bahwa dengan menggunakan medan elektromagnet proses pembakaran menjadi optimal diantaranya adalah dengan menganalisis karakter semburan bahan bakar. Tujuan penelitian ini adalah menganalisis efek magnetisasi bahan bakar terhadap pola semburan bahan bakar. Bahan bakar yang digunakan adalah solar, B10, B40, B70, dan biodiesel. Bahan bakar yang dicoba diberi paparan kuat medan elektromagnet dengan variasi jumlah lilitan kawat 5000-9000 lilitan 836.45 - 1353 Gauss selama 5 menit (300 detik) dan dilanjutkandengan proses penyemprotan melalui alat injector tester pada tekanan 14.7 Mpa. Hasilnya diamati dengan kamera kecepatan tinggi. Tampak bahwa makin besar medan magnet yang diberikan pada bahan bakarmenyebabkan viskositas turun pada kisaran 5-15%, meningkatkan sudut semburan atau luas daerah semburan menjadi lebih besar berkisar 3.5-12%, dan ukuran partikel semburan menjadi lebih kecil sebesar0.2916-0.975 nm. Informasi ini berguna untuk penelitian lebih lanjut agar secara jelas dapat mengklarifikasi fenomena magnetisasi bahan bakar terhadap proses pembakaran yang efisien.
Tinjauan Perkembangan Proses Katalitik Heterogen dan Non-Katalitik untuk Produksi Biodiesel Wahyudin Wahyudin; Armansyah Halomoan Tambunan; Nanik Purwanti; Joelianingsih Joelianingsih; Hiroshi Nabetani
Jurnal Keteknikan Pertanian Vol. 6 No. 2 (2018): JURNAL KETEKNIKAN PERTANIAN
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1406.97 KB) | DOI: 10.19028/jtep.06.2.123-130

Abstract

AbstractBiodiesel is still expected to be an alternative fuel other than petroleum. Therefore, intensive research is being done by researchers in the world to develop biodiesel production process that is more efficient, economical and environmentally friendly. Among them is by developing a catalytic and non-catalytic process. The heterogeneous catalytic process is of particular concern with many promising results and is expected to address the current lack of homogeneous catalytic processes. In Indonesia, many natural catalyst sources have been investigated into potential heterogeneous catalyst. The non-catalytic process also provides a reasonably reliable process expectation of course with its various challenges. Both heterogeneous catalytic processes and non-catalytic processes are believed to be potential processes that can be applied in the near future. The development of the results and the challenges of these two processes, therefore, is reviewed in this work as an innovative biodiesel process technology research opportunity.AbstrakBiodiesel masih diharapkan menjadi bahan bakar alternatif selain dari minyak bumi. Oleh karenanya penelitian yang intensif tengah dilakukan para peneliti di dunia untuk mengembangkan proses produksi biodiesel yang lebih efisien, ekonomis dan ramah lingkungan. Diantaranya adalah dengan mengembangkan proses secara katalitik dan non-katalitik. Proses katalitik heterogen menjadi perhatian khusus dengan banyaknya hasil penelitian yang menjanjikan dan diharapkan dapat mengatasi kekurangan proses katalitik homogen saat ini. Di Indonesia berbagai sumber katalis alami telah diteliti untuk dijadikan katalis heterogen. Namun, proses non-katalitik juga memberikan harapan proses yang cukup bisa diandalkan tentu dengan berbagai tantangannya. Baik proses katalitik heterogen maupun proses non-katalitik diyakini sebagai proses potensial yang dapat diterapkan dalam waktu dekat ini. Oleh karena itu, perkembangan hasil dan berbagai tantangan dari kedua proses tersebut diulas dalam tinjauan ini sebagai peluang penelitian teknologi proses biodiesel yang inovatif.
Analisis Rasio Energi pada Produksi Biodiesel dengan Reaktor Berpengaduk Statik Sistem Kontinu (Energy Ratio Analysis on Biodiesel Production Using Continuous Static Mixing Reactor) Inge Scorpi Tulliza; Armansyah Halomoan Tambunan; Edy Hartulistiyoso; Dadan Kusdiana
Jurnal Keteknikan Pertanian Vol. 8 No. 2 (2020): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.08.2.39-44

Abstract

Energy ratio analysis of various methods and technology of biodiesel production is needed to get an idea of the effectiveness of the method or technology used. This study aims to analyze the energy ratio in the biodiesel production process with a continuous static mixing reactor. RE2 values for biodiesel production using a continuous static mixing reactor with catalysts 0.3% (w/w) and 0.5% (w/w), respectively are 0.94 and 1.03. The addition of the number of modules to achieve the conversion rate required in accordance with SNI-7182 (2018) can increase the energy ratio to 1.10 in the use of catalysts 0.3% (w/w), and 1.09 with the use of a 0.5% catalyst (w/w). The energy ratio value with the addition of the module is about 10% higher than the ratio value for the bacth method using a 1% catalyst and the SMV method without catalyst.
Kinetika Pengeringan Lapisan Tipis Daun Jati Belanda (Thin Layer Drying Kinetics of Guazuma Ulmifolia Leaves) Hendri Syah; Armansyah Halomoan Tambunan; Edy Hartulistiyoso; Lamhot Parulian Manalu
Jurnal Keteknikan Pertanian Vol. 8 No. 2 (2020): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.08.2.53-62

Abstract

The objectives of this study were to determine a suitable thin layer drying model to describe the drying kinetics of Guazuma ulmifolia leaves and determine the mass transfer parameters of Guazuma ulmifolia leaves. The drying of Guazuma ulmifolia leaves was conducted in a laboratory scale dryer with various temperature (40oC, 50oC, and 60oC) and relative humidity (30%, 40%, 50% and 60%). Five drying models, namely, Newton, Henderson and Pabis, Page, Midilli-Kucuk, and Verma et al. were fitted to the drying data. The drying curve of guazuma leaves did not show a constant drying period during the drying period. The models suitability were compared base on coefficient of determination (R2), root square mean errors (RSME), and reduced mean square of deviation (X2). It was found that, among the models evaluated, the Midilli and Kucuk model is the best to describe the drying kinetics of Guazuma ulmifolia leaves. The effective moisture diffusivity was found to be in the range of 10-13 – 10-12 m2/s and the convective mass transfer coefficient was in the range of 10-9 – 10-10 m/s. The activation energy value was found to be 89.21 kJ/mol.
Statistical Analysis of Effect of pH Treatment on Biohydrogen Production from POME Waste Junita Tarigan; Armansyah Halomoan Tambunan; Radite Praeko Agus Setiawan; Obie Farobie; Furqon
Jurnal Keteknikan Pertanian Vol. 10 No. 3 (2022): Desember 2022
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.010.3.319-327

Abstract

Palm Oil Mill Effluent (POME) has the potency to be converted to biohydrogen by dark fermentation. The statistical approach was used to determine the relationship between pH and biohydrogen production. This study aims to investigate the effect of pH on biohydrogen production with a statistical approach. Three substrates were treated with neutral pH and three without pH treatment. This experiment used the trapezoidal numerical integration method to get the total production of H2 produced per measurement time interval. There are nine substrate combinations tested. Three tests concluded that there was no difference in hydrogen production due to the pH treatment, and the sixth test concluded that there was a difference in hydrogen production due to the influence of pH. The tendency of every substrate to influence biohydrogen production without pH treatment and with pH treatment is a polynomial degree 3.
Simulation on the Breakthrough Curve During CO2 Adsorption from Biogas in a Fixed Bed Column Kindi, Hablinur al; Tambunan, Armansyah Halomoan; Hartulistiyoso, Edy; Salundik, Salundik; Sutoyo, Edi; Sutisna, Setya Permana
ASEAN Journal of Chemical Engineering Vol 23, No 3 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.82470

Abstract

Separation of CO2 gas from the biogas can be accomplished by adsorption process. An adsorbent has a maximum capacity, so the adsorbent will eventually be saturated at a certain time. Therefore, it is necessary to simulate the adsorption mass transfer to produce a breakthrough curve. The breakthrough curve from the simulation of adsorption mass transfer was validated with the experimental data. The research was conducted using variations in temperature and pressure. The mass transfer simulation was solved using the finite difference method. The adsorbent used in this research was 13X zeolite and the biogas was obtained from cow dung waste. Convergent curves can be obtained in numerical simulations as breakthrough curves. This research shows that adsorption should occur at low temperatures and high pressure. Column height and flow velocity also influence the breakthrough time. The comparison of the simulated breakthrough time with experimental data is not much different with R2 0.9969. The striking difference is in the adsorption zone with average relative error (ARE) values ranging from 9.57% to 20.49%. From the results of entropy, enthalpy, and Gibbs free energy calculations, the biogas adsorption research on the 13x zeolite column is an exothermic and spontaneous process
Study on Characteristics of Oil Palm Empty Fruit Bunch to Predict Condensation Temperature of Tar From Its Pyrolysis Gas Joni Joni; Armansyah Halomoan Tambunan; Radite Praeko Agus Setiawan; Kiman Siregar
International Journal of Oil Palm Vol. 2 No. 3 (2019): September 2019
Publisher : Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35876/ijop.v2i3.42

Abstract

Palm oil is one type of plants that has various advantages. One of the advantages is almost all parts of the plant, such as trunk, empty fruit bunch (EFB), and the extracted oil, can be utilized as energy. Utilization of EFB for energy, especially the use of combustible gas as direct feed of combustion engines to generate electricity is still rarely used. This is related to the water content and the large amount of volatile substances that will give an unfavorable impact on the quality of the gas produced. To overcome this, information on the characteristics and thermophysical properties, such as dew point, of gases from the EFB biomass is indispensable. In this study, three EFB samples were taken from three different environmental conditions, namely samples A, B and C, to be analyzed. The elemental and proximate analysis as well as GCMS pyrolysis test of the samples were then used to characterize the EFB and determine its thermo-physical properties in terms of its dew point. The elemental analysis of the EFB samples showed disparity of its content, which was around 52.08 ± 7.59% (C), 7.05 ± 0.53% (H), 2.28 ± 0.43% (N), 0.35 ± 0.36% (S) and 34.84 ± 4.45% (O). Likewise, the proximate analysis showed differences around 4.49 ± 2.60% (MC), 5.80 ± 1.97% (FC) and 73.44 ± 3.78% (VM). From the elemental and proximate analysis, it can be predicted that tar compounds produced from pyrolysis of the EFB at a temperature of 400oC, was in the form of mixed oxidation compounds (mixed oxygenates). The compounds were classified as the first tar compound (class 2) consisting of phenols (ketones, phenol and guaiacol). The condensation temperature and the concentration of the tar in its pyrolysis gas were predicted to be 204.22oC, tar 1720.79 mg/Nm3 (sample A); 256.02oC, tar 92.97 mg/Nm3 (sample B); and154.85oC, tar 359.02 mg/Nm3 (sample C), respectively. This information can be useful in designing the tar elimination devices from the pyrolysis gas.
Technical Feasibility to Utilize Wasted Empty Fruit Bunch from Small Scale Farms for Simultaneous Production of Biochar and Electricity Dwi Setiawan; Johanis Rumengan Pangala; Abdul Baits Dehana Padma Swastika; Armansyah Halomoan Tambunan
International Journal of Oil Palm Vol. 3 No. 3 (2020): September 2020
Publisher : Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35876/ijop.v3i3.54

Abstract

Biochar production by pyrolysis stove and utilization of the excess heat to generate electricity, simultaneously, could improve the performance of the whole system, and give a significant solution to both energy and environmental problems. This is especially if implemented as a stand-alone facility and applied in a remote area. The purpose of this study is to evaluate technical feasibility and strategy in using pyrolysis stoves to produce biochar and generate electricity by ORC, simultaneously. This study combines various data obtained previously, which consists of pyrolysis stove design and performance test for simultaneous biochar production and thermal energy use, and ORC experiments for electricity generation. Those data then was used to analyze the technical feasibility of the simultaneous production of biochar and electricity generation using the excess heat from the pyrolysis stove. The integration of the pyrolysis stove with the ORC was conducted in a simulative study. The results showed that biochar produced using the pyrolysis stove has characteristics that are very supportive for use as a soil enhancer. Excess heat from the pyrolysis stove during the production of biochar can be used to fuel the ORC system to generate electricity. The optimum biochar yield and thermal efficiency of the ORC were found to be optimum at the stove's airflow rate of 0.034-0.035 kg/s. Accordingly, a combination of biochar production and electricity generation using the ORC system is considered to be technologically feasible to meet the sustainability requirement.
Potential for Utilizing POME to Produce Biohydrogen Gas Using Microbial Electrolysis Cell Ferdy Christian Hartanto; Nadia Nurul Atikah; Mohammad Sahid Indrawan; Armansyah Halomoan Tambunan
International Journal of Oil Palm Vol. 5 No. 2 (2022)
Publisher : Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35876/ijop.v5i2.78

Abstract

Palm oil mill effluent contains organic matter and microorganisms that can potentially be reused despite of its impact to the environment. Microbial electrolysis cell is a method that utilizes electrogenic bacteria to produce hydrogen gas. This study aims to explore the potential for utilizing palm oil mill effluent to produce hydrogen gas using microbial electrolysis cells. Experiments were conducted in a specially built MEC reactor with a 3.5 L capacity with 0.5, 1.0, and 1.5 V with carbon fiber cloth as electrodes. A gas analyzer was used to measure hydrogen gas over the course of 24 h at a 2 h interval. Palm oil mill effluent was utilized as a substrate, while distilled water was used as a control. Experiments demonstrate that the amount of hydrogen gas produced increases as the voltage increases, with values of 37 mg m-3 at 0.5 V, 136 mg m-3 at 1.0 V, and 358 mg m-3 at 1.5 V. When comparing the yield of hydrogen gas produced with distilled water substrate at 1.5 V, the yield of palm oil mill effluent substrate is always higher. This could be due to microbial activity increasing the rate of electrolysis of the substrate into hydrogen gas.
Co-Authors . Furqon Abdul Baits Dehana Padma Swastika Arief Sabdo Yuwono Bintang C. H. Simangunsong Bintang Sipartogi Panjaitan Dadan Kusdiana Desrial Dwi Setiawan Edy Hartulistiyoso Ema Hastarini Erliza Noor Ferdy Christian Hartanto Frances Roi Seston Tampubolon Furqon Hablinur Alkindi Hendri Syah Hiroshi Nabetani Hiroshi Nabetani Ida Bagus Putu Gunadnya Inge Scorpi Tulliza Irfan, Akhmad Joelianingsih . Johanis Rumengan Pangala Joni Joni Joni Junita Tarigan Kamaruddin Abdullah Kiman Siregar Kiman Siregar, Kiman Lamhot Parulian Manalu Lamhot Parulian Manalu Linda Lestari Marpaung, Johana Mohammad Sahid Indrawan Nadia Nurul Atikah Nanik Purwanti Obie Farobie Panjaitan, Bintang Sipartogi Prastowo Prastowo Radite Praeko Agus Setiawan Raju, Muhammad Rodiah Nurbaya Sari, Rodiah Nurbaya Rusman Sinaga Salundik Sebayang, Renaldi Setya Permana Sutisna Sutoyo, Edi Tatun Hayatun Nufus Tetsuya Araki Wahyudin Wahyudin Wawan Hermawan Widyajatmiko, Athanatius Henang Wicaksono