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UNJUK KERJA GENERATOR LISTRIK BERBAHAN BAKAR BIOGAS Caroko, Novi; Surahmanto, Fredy; Sulistiyo, Rizki
JMPM : Jurnal Material dan Proses Manufaktur Vol 3, No 1 (2019): JUNI 2019
Publisher : JMPM : Jurnal Material dan Proses Manufaktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.3137

AbstrakPengujian unjuk kerja generator berbahan bakar biogas belum banyak dilakukan. Penelitian ini bertujuan untuk mengetahui unjuk kerja genset berbahan bakar biogas. Bahan baku biogas yang digunakan pada penelitian ini berasal dari kotoran sapi. Pengambilan biogas dilakukan di kelompok ternak sapi Pandan Mulyo, Bantul, Yogyakarta. Generator yang digunakan berkapasitas daya 2.200-Watt dan variasi pembebanan 660, 720, 780, 840, dan 900 Wat. Parameter yang diambil berupa tegangan, arus, putaran mesin, dan debit biogas. Hasil penelitian menunjukkan daya keluaran genset dari 5 variasi pembebanan yaitu 660, 720, 780, 840, dan 900 Watt berturut-turut adalah 599,4; 651; 681,6; 676,5; dan 668,5 Watt. Nilai konsumsi bahan bakar dari 5 variasi pembebanan yaitu 0,645; 0,652; 0,673; 0,680; dan 0,727 kg/jam. Dari 5 variasi pembebanan menunjukkan bahwa unjuk kerja paling optimal dari genset berbahan bakar biogas ini berada pada tingkat pembebanan 660 Watt dengan daya keluaran yang dihasilkan sebesar 599,4 Watt.AbstrakThe performance testing of biogas-fueled generators has not been carried out much. This study aims to determine the performance of biogas fueled generators. The biogas raw material used in this study was cow dung. Biogas extraction was carried out in the Pandan Mulyo cattle group, Bantul, Yogyakarta. The generator used is 2,200-Watt power capacity and variations in loading 660, 720, 780, 840, and 900 Watt. The parameters are taken in the form of voltage, current, engine rotation, and flow of biogas. The results showed the generator output power of 5 experiment variations, 660, 720, 780, 840, and 900 Watt, respectively, were 599.4; 651; 681.6; 676.5; and 668.5 Watt. The fuel consumption of 5 variations are 0.645; 0.652; 0.673; 0.680; and 0.727 kg / hour. From all variations, showed that the optimal performance of the biogas fueled generator is at 660 Watt with the output power of 599.4 Watt.

PERFORMANCE STUDY OF WOOD CHIPS GASIFICATION STOVE fredy surahmanto
VANOS Journal of Mechanical Engineering Education Vol 4, No 2 (2019)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v4i2.6730

This research aims at investigating the performance of a gasification stove with wood-chips as fuel and recognizing the factors affecting. The stove consisted of a reactor, a char chamber, and a burner. The fuel was fed into the reactor with a certain amount of primary air was flowed through the bottom part of the reactor, and then was ignited from the topside of the fuel. Meanwhile, combustion zone move down and left char that would be taken out after the process finished. Combustible gases resulted from reactions flowed to the burner where the secondary air enters through holes located at burner side combusted the combustible gases. The highest performance achieve was still relatively low (7.3 %), so that model design improvement is required. The stove performance could be possibly influenced by the following parameters, namely: combustion zone propagation rate, fuel consumption rate, and specific gasification rate, which all of them were very interrelated and indicated temperature stability that was proportional to the efficiency achieved. These were shown by stable water temperature profile obtained from boiling process during gasification. The more stable the process the higher the efficiency.

Unjuk Kerja Generator Listrik Berbahan Bakar Biogas Novi Caroko; Fredy Surahmanto; Rizki Sulistiyo
JMPM (Jurnal Material dan Proses Manufaktur) Vol 3, No 1 (2019): Juni
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.3137

AbstrakPengujian unjuk kerja generator berbahan bakar biogas belum banyak dilakukan. Penelitian ini bertujuan untuk mengetahui unjuk kerja genset berbahan bakar biogas. Bahan baku biogas yang digunakan pada penelitian ini berasal dari kotoran sapi. Pengambilan biogas dilakukan di kelompok ternak sapi Pandan Mulyo, Bantul, Yogyakarta. Generator yang digunakan berkapasitas daya 2.200-Watt dan variasi pembebanan 660, 720, 780, 840, dan 900 Wat. Parameter yang diambil berupa tegangan, arus, putaran mesin, dan debit biogas. Hasil penelitian menunjukkan daya keluaran genset dari 5 variasi pembebanan yaitu 660, 720, 780, 840, dan 900 Watt berturut-turut adalah 599,4; 651; 681,6; 676,5; dan 668,5 Watt. Nilai konsumsi bahan bakar dari 5 variasi pembebanan yaitu 0,645; 0,652; 0,673; 0,680; dan 0,727 kg/jam. Dari 5 variasi pembebanan menunjukkan bahwa unjuk kerja paling optimal dari genset berbahan bakar biogas ini berada pada tingkat pembebanan 660 Watt dengan daya keluaran yang dihasilkan sebesar 599,4 Watt.AbstrakThe performance testing of biogas-fueled generators has not been carried out much. This study aims to determine the performance of biogas fueled generators. The biogas raw material used in this study was cow dung. Biogas extraction was carried out in the Pandan Mulyo cattle group, Bantul, Yogyakarta. The generator used is 2,200-Watt power capacity and variations in loading 660, 720, 780, 840, and 900 Watt. The parameters are taken in the form of voltage, current, engine rotation, and flow of biogas. The results showed the generator output power of 5 experiment variations, 660, 720, 780, 840, and 900 Watt, respectively, were 599.4; 651; 681.6; 676.5; and 668.5 Watt. The fuel consumption of 5 variations are 0.645; 0.652; 0.673; 0.680; and 0.727 kg / hour. From all variations, showed that the optimal performance of the biogas fueled generator is at 660 Watt with the output power of 599.4 Watt.

KINERJA ALAT ELEKTROPLATING UNTUK PRAKTIK DI SMK Widodo Apriliyanto; Heri Wibowo; Arianto Leman Soemowidagdo; Didik Nurhadiyanto; Fredy Surahmanto; Mujiyono Mujiyono; Novi H; Agung W.
Jurnal Dinamika Vokasional Teknik Mesin Vol. 6 No. 2 (2021): Oktober
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v6i2.44129

Sebuah alat untuk proses elektroplating yang mampu mengakomodasi sembilan tahap proses yang telah dikembangkan untuk praktik di SMK perlu diketahui kinerjanya terkait kelayakannya sebagai sarana pendukung praktik. Uji kinerja dilakukan pada baja lunak. Variasi kuat arus adalah 1,8; 2,6; dan 3,6 A. Variasi lama proses pelapisan adalah 4 menit 50 detik dan 9 menit 39 detik. Hasil pengujian menunjukkan bahwa kuat arus 1,8 A dengan lama proses 4 menit 50 detik dan kuat arus 3,6 A dengan lama proses 9 menit 39 detik tidak direkomendasikan untuk pembelajran praktik menggunakan alat yang dikembangkan. Karakteristik lapisan yang dihasilkan adalah mengkilap, halus, dan merata. Efisiensi alat adalah 84,45 % untuk target tebal lapisan 10 µm pada kuat arus 7,5 A/dm2.

Hubungan Pengetahuan dan Sikap K3 terhadap Kesadaran Perilaku Siswa di SMK Pangudi Luhur Muntilan Frendy Nur Setyawan; Fredy Surahmanto
Jurnal Dinamika Vokasional Teknik Mesin Vol. 7 No. 1 (2022)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v7i1.48738

Penelitian ini bertujuan untuk mengetahui hubungan pengetahuan K3 terhadap kesadaran perilaku K3, hubungan sikap K3 terhadap kesadaran perilaku K3 hubungan pengetahuan dan sikap K3 terhadap kesadaran perilaku K3. Penelitian ini merupakan penelitian expost facto dengan populasi berjumlah 102 orang dan sampel 68 orang. Hasil penelitian ini menunjukkan terdapat hubungan positif dan signifikan antara variabel pengetahuan K3 terhadap variabel kesadaran perilaku K3 sebesar 25%, terdapat hubungan positif dan signifikan antara variabel sikap K3 terhadap variabel kesadaran perilaku K3 sebesar 27%, terdapat terjadinya hubungan positif dan signifikan antara variabel pengetahuan K3 dan sikap K3 secara bersamaan terhadap variabel kesadaran perilaku K3 sebesar 34%.

Hydrothermal Treatment of Herb Residue for Solid Fuel Production Fredy Surahmanto; Didik Nurhadiyanto; Mujiyono Mujiyono; Chinnathan Areeprasert; Mochamad Syamsiro
ASEAN Journal of Chemical Engineering Vol 21, No 1 (2021)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.62594

Hydrothermal processing is appraised as one of advanced technologies for wet solid waste handling. In this study, herb residue was subjected to hydrothermal treatment. Calorific value, yield, and also proximate analysis of obtained hydro-char were investigated. A cylindrical reactor with an internal volume of 2.5 Litres made of stainless steel and a low-tech component was used in the experiment. The reactor was equipped with a stirrer to ensure heat transfer took place through the entire parts of the solid-water mixture. Solid products were dried by a microwave oven before analysis. The results show that the final temperature, holding time, and solid-water ratio have various effects on the hydro-char yield, calorific value, and proximate analysis of the hydrothermal products. The hydro-char yield decreased with the increase in final temperature and holding time. Meanwhile, the highest hydro-char yield was obtained at the solid-water ratio of ¼. The hydro-char calorific value increased with the increase in final temperature, holding time, and solid-water ratio. The rise in final temperature, holding time, and solid-water ratio resulted in a lower moisture content and volatile matter but higher fixed carbon. Meanwhile, the ash content increased with the solid-to-water ratio.

Temperature Distribution in Bio Stove using Saw Dust: An Integrated Project-based Learning W. Wagiran; M. Mujiyono; Bayu Rahmat Setiadi; Yulianto Eko Wibowo; Fredy Surahmanto; Dendy Aqila Agata; Chinnathan Areeprasert
Indonesian Journal of Science and Technology Vol 8, No 1 (2023): IJOST: April 2023
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v8i1.53476

This paper aims at developing the potential of cellulose-based energy generation using pyrolysis, gasification, and combustion methods with biodegradable waste media. The cellulose-based material used in this study was sawdust. The sawdust was heated using a biomass stove, which was then analyzed in terms of heat conduction and propagation as well as temperature distribution. To ensure the effectiveness of sawdust as the main material in the biomass stove, sawdust particles were pressed and compacted under various pressure conditions. This experiment was integrated with the Project-Based Learning method through the following steps: (1) determination of projects testing, (2) project design, (3) project implementation schedules, (4) project completion and progress monitoring, (5) reports and presentations of project results, and (6) project evaluation. The results provide new findings that the denser sawdust particles correlate with the greater temperature and propagation rate. This can be obtained from the measured temperature distribution. Areas close to the heat source tend to have the same heat propagation. The density of the sawdust particle is the main key point for producing better pyrolysis and gasification process, in which it correlates with long combustion energy. Integrasi This finding opens a new concept and can be used as a reference for other researchers who develop research related to renewable energy from waste, especially when using a biomass stove. This study also gives ideas for the need for developing project-based learning using the burning of sawdust using biomass stove as a tool for the teaching and learning process.

Pemanfaatan Limbah Sekam Padi Sebagai Sumber Kalor Ruang Pengering Produk Pertanian Anak Agung Putu Susastriawan; Fredy Surahmanto; Suparni Setyowati Rahayu
Jurnal Serambi Engineering Vol 8, No 3 (2023): Juli 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i3.6278

Limbah biomassa di Indonesia sangat berpotensi sebagai sumber energi kalor ruang pengering produk pertanian. Penelitian ini bertujuan untuk memanfaatkan limbah sekam padi menjadi sumber kalor untuk pengeringan produk pertanian serta mengetahui unjuk kerja ruang pengering dengan bahan bakar sekam padi. Penelitian diawali dengan pembuatan rancang bangun mesin pengering yang dilanjutkan dengan pengujian unjuk kerja. Mesin pengering memiliki komponen utama berupa tungku pembakaran, ruang pengering, blower, dan suction fan. Pengujian unjuk kerja mesin pengering dilakukan untuk pengeringan cabai. Tujuan penelitian adalah untuk mengetahui pengaruh mode aliran konveksi flue gas terhadap efisiensi dan konsumsi energi spesifik (SEC) mesin pengering. Hasil penelitian menunjukkan bahwa mesin pengering dapat beroperasi dengan baik. Efisiensi mesin pengering aliran konveksi paksa lebih tinggi dari efisiensi mesin pengering aliran konveksi alami dan sebaliknya SEC mesin pengering aliran paksa lebih rendah dari SEC mesin pengering aliran konveksi alami. Efisiensi mesin pengering mencapai 25,12% untuk aliran konveksi paksa dan 10,50% untuk aliran konveksi alami. Sedangkan SEC mesin pengering aliran konveksi paksa sebesar 198370,37 kJ/kg uap air dan 918171,42 kJ/kg uap air untuk aliran konveksi alami.

Pemanfaatan Limbah Sekam Padi Sebagai Sumber Kalor Ruang Pengering Produk Pertanian Anak Agung Putu Susastriawan; Fredy Surahmanto; Suparni Setyowati Rahayu
Jurnal Serambi Engineering Vol 8, No 3 (2023): Juli 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i3.6278

Limbah biomassa di Indonesia sangat berpotensi sebagai sumber energi kalor ruang pengering produk pertanian. Penelitian ini bertujuan untuk memanfaatkan limbah sekam padi menjadi sumber kalor untuk pengeringan produk pertanian serta mengetahui unjuk kerja ruang pengering dengan bahan bakar sekam padi. Penelitian diawali dengan pembuatan rancang bangun mesin pengering yang dilanjutkan dengan pengujian unjuk kerja. Mesin pengering memiliki komponen utama berupa tungku pembakaran, ruang pengering, blower, dan suction fan. Pengujian unjuk kerja mesin pengering dilakukan untuk pengeringan cabai. Tujuan penelitian adalah untuk mengetahui pengaruh mode aliran konveksi flue gas terhadap efisiensi dan konsumsi energi spesifik (SEC) mesin pengering. Hasil penelitian menunjukkan bahwa mesin pengering dapat beroperasi dengan baik. Efisiensi mesin pengering aliran konveksi paksa lebih tinggi dari efisiensi mesin pengering aliran konveksi alami dan sebaliknya SEC mesin pengering aliran paksa lebih rendah dari SEC mesin pengering aliran konveksi alami. Efisiensi mesin pengering mencapai 25,12% untuk aliran konveksi paksa dan 10,50% untuk aliran konveksi alami. Sedangkan SEC mesin pengering aliran konveksi paksa sebesar 198370,37 kJ/kg uap air dan 918171,42 kJ/kg uap air untuk aliran konveksi alami.

Bubble flow configurations generated by ejector type bubble generator Catrawedarma, I Gusti Ngurah Bagus; Ton, Sefri; Pranowo, Dadang Dwi; Surahmanto, Fredy; Astyanto, Achilleus Hermawan
International Journal of Applied Sciences and Smart Technologies Volume 07, Issue 1, June 2025
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v7i1.10816

Bubble flow configurations generated by an ejector bubble generator were captured using a high-speed video camera and extracted into several images. The air flow and nozzle diameter were varied during the test in ranges of 0.1-1.5 lpm and 1.17-3.5 mm, respectively. The results reveal that in general the bubble flow structure coming out from the bubble generator is divided into three regions, namely the entrance, bubble swarm, and bubble dispersed region. It is found that there is a higher time delay of bubble production when the air flow and the nozzle diameter decrease. On the other hand, the bubble production time is longer, if the air flow and the nozzle diameter increase.

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