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<![CDATA[Pengaruh Variasi Diameter Elektroda E7018 Terhadap Kekuatan Tarik, Kekerasan, dan Struktur Mikro Pengelasan pada Baja Karbon Rendah Jenis SS400 dengan Metode SMAW ]]>
<![CDATA[Rizal Abdul Azis]]>;
<![CDATA[Suharno Suharno]]>;
<![CDATA[Herman Saputro]]>
<![CDATA[ Jurnal Teknik Vol 17 No 2 (2019): Jurnal Teknik ]]>
Publisher : <![CDATA[Universitas Negeri Gorontalo ]]>
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DOI: 10.37031/jt.v17i2.53
<![CDATA[Metal welding by the welding method has weaknesses including the decrease in strength of the material and the results of residual stress, as well as the presence of cracks due to the welding process. The purpose of this research is to know the effect of variations in the diameter of the electrode E7018 to tensile strength, hardness, and microstructure on alloysteel SS400 before (raw material) and after welding using welding methodes Shileded Metal Arc Welding (SMAW) methode. This research uses experimental methode. Technique of data analysis used is the comparative descriptive. Based on the results of the reseach, it can be conclude that the result of the micro structure test showed an inrease perlit structure after welding. On raw material, ferrit structure looks prevalent but on welding result using SMAW welding methods with the variation in the diameter of the electrode 2.6 mm, 3.2 mm, and 4.0 mm showed that the ferrit decreases on each specimen, so the perlite structure is very dominating. Value of tensile strength on the welding result showed a difference in tension and strain. Specimen with a diameter of electrode 4.0 mm have a higher tension level and strain is 471.11 MPa and 24.98% if compared to the electrode diameter 3.2 mm specimen is 470.15 MPa and 24.81%, and the electrode diameter 2.6 mm is 462.42 MPa and 20.57%. This research shows that the welding using diameter variation of electrode changed value of the tensile strength, micro structure and effected on the value of hardness alloy Steel SS400.]]>
<![CDATA[PENINGKATAN EFISIENSI DAN TEKNO-EKONOMI PRODUKSI PAKAN IKAN MENGGUNAKAN MODIFIKASI MESIN PENCACAH GANDA ]]>
<![CDATA[Iksan Riva Nanda]]>;
<![CDATA[Herman Saputro]]>;
<![CDATA[Husin Bugis]]>;
<![CDATA[Dwi Yudha Meydiansyah]]>;
<![CDATA[Handy Prabowo]]>;
<![CDATA[Hermawan Yudha Prasetya]]>;
<![CDATA[Dzakwan Murtadlo Mukti]]>
<![CDATA[ BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2023) ]]>
Publisher : <![CDATA[Universitas Majalengka ]]>
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DOI: 10.31949/jb.v4i2.4763
<![CDATA[Permintaan ikan budidaya tambak semakin meningkat dan bervariasi, tetapi mahalnya pakan ikan untuk pemenuhan nutrisi ikan budidaya tambak semakin meningkat. Modifikasi mesin pencacah ganda dikembangkan dan diteliti untuk meningkatkan produktivitas pembuatan pakan ikan dari limbah ikan yang melimpah. Investigasi eksperimental dilakukan dengan mengombinasikan analisis efisiensi dan tekno-ekonomi modifikasi mesin pencacah ganda di UMKM Margo Mulyo Abadi. Pengambilan data penelitian efisiensi dilakukan sebanyak 4-5 replikasi dengan menggunakan limbah ikan kering dan limbah ikan basah pada pemotongan manual dan mesin pencacah ganda sebagai perbandingan. Biaya produksi mesin pencacah ganda diperhitungkan untuk menentukan keterjangkauan mesin yang diusulkan. Hasil penelitian menunjukan bahwa kecepatan pembuatan pakan ikan dari limbah ikan basah lebih lama dibanding limbah ikan kering baik menggunakan pemotongan manual maupun mesin pencacah ganda. Mesin pencacah ganda jauh lebih cepat daripada pemotongan manual dalam membuat pakan ikan dari limbah ikan basah dan kering dengan kapasitas hingga 210 kg/jam dibandingkan hanya 15 kg/jam dengan pemotongan manual. Mesin pencacah ganda diukur dan didapatkan skor REBA 3 berisiko rendah sedangkan pemotongan manual mempunyai skor REBA 8 berisiko tinggi. Kelayakan penggunaan dan ekonomi mesin ini direkomendasikan karena rendah biaya produksi dan aman dalam penggunaannya.]]>
<![CDATA[Pemberdayaan Industri Rumah Tangga (IRT) Melalaui Rancang Bangun Teknologi Pengolahan Minuman Herbal ]]>
<![CDATA[Herman Saputro]]>;
<![CDATA[Gusti Fauza]]>;
<![CDATA[Elisa Herawati]]>;
<![CDATA[Catur Sugiarto]]>;
<![CDATA[Tastafiyan Risfandy]]>;
<![CDATA[Riyadi Muslim]]>
<![CDATA[ ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 5 No 3 (2023): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat ]]>
Publisher : <![CDATA[Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang ]]>
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DOI: 10.24036/abdi.v5i3.471
<![CDATA[Tujuan pengabdian masyarakat ini untuk meningkatkan kualitas dan kuantitas produksi minuman herbal berbahan dasar empon-empon berbasis teknologi untuk kelompok masyarakat Industri Rumah Tangga (IRT) dusun Joso, Temboro, Karang Tengah, Kab. Wonogiri. Dampak pandemi covid 19 menyebabkan peningkatan kebutuhan akan konsumsi jamu herbal, sedangkan IRT belum mampu memenuhi permintaan tersebut. Karang tengah sebagai salah satu penyumbang kelompok produksi jamu tradisional terbesar dengan total persebaran 515 produsen jamu perlu didorong agar dapat berkembang. Melihat permasalahan tersebut Tim Pengabdian Kepada Masyarakat (PKM) Universitas Sebelas Maret memberikan dukungan melalui rancang bangun teknologi berupa Mesin Press dan Mesin Blender. Metode pelaksanaan pengabdian diawali dengan observasi dan perancangan mesin melalui 5 tahap perancangan. Hasil perancangan menunjukkan ada peningkatan efisensi kuantitas dan kualitas produksi minuman herbal yang dilakukan. Program ini memberi pengaruh besar kepada masyarakat dalam melihat teknologi sebagai bagian penting dalam meningkatkan usaha berbasis kelompok masarakat.]]>
<![CDATA[Experimental study of RDF-5 performance based on natural waste on fast pyrolysis process on the quality of the liquid smoke ]]>
<![CDATA[Herman Saputro]]>;
<![CDATA[Laila Fitriana]]>;
<![CDATA[Aris Purwanto]]>;
<![CDATA[Riyadi Muslim]]>;
<![CDATA[Muchlis Mahmuddin]]>
<![CDATA[ International Journal of Advances in Applied Sciences Vol 12, No 3: September 2023 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijaas.v12.i3.pp250-256
<![CDATA[Energy problems are one of the cases faced by almost all countries in the world. No longer found oil reserves in significant quantities causing problems in the energy sector. The world's energy needs continue to increase and become a global problem in the use of energy in various sectors resulting in an energy crisis. The use of waste-to-energy (WtE) technology is appropriate, considering that energy needs continue to increase along with the increasing amount of waste that is not managed and hurts the ecosystem. Refuse-derived fuel (RDF) is a waste management technique that converts waste into bio-solid fuel. RDF is produced from the mechanical separation of combustible and non-combustible fractions from waste. Utilizing RDF biomass from durian peel and sugar palm is one of the efforts to maximize the pyrolysis process in organic waste, increasing the combustion potential. Processing durian skin and sugar palm waste into RDF will maximize the potential of the combustion results, which can later facilitate testing. This study also aims to utilize sugar palm waste and durian peel to have a use value as an alternative fuel. This research was an experimental study, fast pyrolysis was employed by using 300 grams both in durian and sugar palm, and the temperature was varied from 400, 500, and 600 °C. The results showed that the test of liquid smoke RDF-5 sugar palm at a temperature of 400 °C at 112 mL and RDF-5 durian at 600 °C at 137 mL.]]>
<![CDATA[PENINGKATAN EFISIENSI DAN TEKNO-EKONOMI PRODUKSI PAKAN IKAN MENGGUNAKAN MODIFIKASI MESIN PENCACAH GANDA ]]>
<![CDATA[Iksan Riva Nanda]]>;
<![CDATA[Herman Saputro]]>;
<![CDATA[Husin Bugis]]>;
<![CDATA[Dwi Yudha Meydiansyah]]>;
<![CDATA[Handy Prabowo]]>;
<![CDATA[Hermawan Yudha Prasetya]]>;
<![CDATA[Dzakwan Murtadlo Mukti]]>
<![CDATA[ BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2023) ]]>
Publisher : <![CDATA[Universitas Majalengka ]]>
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DOI: 10.31949/jb.v4i2.4763
<![CDATA[Permintaan ikan budidaya tambak semakin meningkat dan bervariasi, tetapi mahalnya pakan ikan untuk pemenuhan nutrisi ikan budidaya tambak semakin meningkat. Modifikasi mesin pencacah ganda dikembangkan dan diteliti untuk meningkatkan produktivitas pembuatan pakan ikan dari limbah ikan yang melimpah. Investigasi eksperimental dilakukan dengan mengombinasikan analisis efisiensi dan tekno-ekonomi modifikasi mesin pencacah ganda di UMKM Margo Mulyo Abadi. Pengambilan data penelitian efisiensi dilakukan sebanyak 4-5 replikasi dengan menggunakan limbah ikan kering dan limbah ikan basah pada pemotongan manual dan mesin pencacah ganda sebagai perbandingan. Biaya produksi mesin pencacah ganda diperhitungkan untuk menentukan keterjangkauan mesin yang diusulkan. Hasil penelitian menunjukan bahwa kecepatan pembuatan pakan ikan dari limbah ikan basah lebih lama dibanding limbah ikan kering baik menggunakan pemotongan manual maupun mesin pencacah ganda. Mesin pencacah ganda jauh lebih cepat daripada pemotongan manual dalam membuat pakan ikan dari limbah ikan basah dan kering dengan kapasitas hingga 210 kg/jam dibandingkan hanya 15 kg/jam dengan pemotongan manual. Mesin pencacah ganda diukur dan didapatkan skor REBA 3 berisiko rendah sedangkan pemotongan manual mempunyai skor REBA 8 berisiko tinggi. Kelayakan penggunaan dan ekonomi mesin ini direkomendasikan karena rendah biaya produksi dan aman dalam penggunaannya.]]>
<![CDATA[Penerapan Teknologi Pencacah Multi Blade Pada Proses Pengolahan Limbah Ikan sebagai Upaya Pemberdayaan Nelayan Di Desa Berahan Kulon, Kecamatan Wedung Kabupaten Demak ]]>
<![CDATA[Laila Fitriana]]>;
<![CDATA[Herman Saputro]]>;
<![CDATA[Husin Bugis]]>;
<![CDATA[Budi Siswanto]]>;
<![CDATA[Ranto Ranto]]>;
<![CDATA[Riyadi Muslim]]>
<![CDATA[ SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 12, No 1 (2023): Mei ]]>
Publisher : <![CDATA[LPPM UNS ]]>
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DOI: 10.20961/semar.v12i1.56315
<![CDATA[Desa Berahan Kulon Kec. Wedung Kab. Demak merupakan desa daerah pesisir pantai utara Jawa yang memiliki potensi perikanan yang cukup besar. Kegiatan usaha itu meliputi usaha perikanan air laut, air payau dan air tawar. Hasil tangkapan ikan laut setiap tahunnya tidak kurang dari 600 ton, serta budidaya ikan air tawar mencapai 97.6 ton per tahun. Potensi produksi ikan tersebut menyisakan limbah ikan dan kerang yang belum termanfaatkan dengan baik. Kegiatan yang dikeloala kelompok petani tambak dan nelayan tersebut juga memiliki masalah pada suplai dan harga pakan ikan yang selalu berubah-ubah. Akibat permasalahan tersebut usaha tambak yang dikelola melalui Kelompok Budidaya Ikan Margo mulyo mengalami kerugian. Adanya potensi dan permasalahan tersebut maka dilakukan kegiatan pengabdian masyarakat terkait kemandirian pakan ikan dengan penerapan teknologi mesin pembuat tepung ikan. Penerapan teknologi pencacah multi blade untuk memudahkan proses pengolahan limbah ikan tangkapan nelayan menjadi tepung ikan. Kegiatan kemitraan ini difokuskan bagaimana menyediakan alat produksi tepung ikan dan pelatihan produksi bagi nelayan. Kegiatan kemitraan UMKM Margo Mulyo Abadi dengan UNS ini mampu menjadi solusi akan isu yang berkembang, sekaligus mampu meningkatkan nilai ekonomis limbah ikan sehingga terdapat peningkatan pendapatan bagi para anggotanya. Kata kunci: Pemberdayaan; Teknologi Pencacah; multi-blade; limbah ikan; tepung ikan.]]>
<![CDATA[Pengaruh Jumlah Sudu dan Pembebanan Terhadap Energi Listrik Yang Dihasilkan OlehTurbin Angin SumbuHorizontal Skala Mikro ]]>
<![CDATA[Vita Ayu Aspriyanti]]>;
<![CDATA[Herman Saputro]]>;
<![CDATA[Danar Susilo Wijayanto]]>
<![CDATA[ Nozel : Jurnal Pendididikan Teknik Mesin Vol 3, No 3 (2021) ]]>
Publisher : <![CDATA[Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta ]]>
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DOI: 10.20961/nozel.v3i3.62970
<![CDATA[The needs of electrical energy particularly in Indonesia is very great and continues to increase every year. The development of a micro scale horizontal axis wind turbine can be a solution to solve that. This research has a purpose to find out the influence of number of blades and wind speed variation on electrical energy produced by micro scale horizontal axis wind turbines. The method which was used in this research was experiment method and it was implemented at the Laboratory of Study Program of Mechanical Engineering Education of Sebelas Maret University. The variable that was used in this research was by using blades with airfoil SG6043 with variations of blades number and the giving load in the form of 12v and 24v LED lights. The horizontal axis wind turbine rotor has a diameter of 800 mm and a blade length of 400 mm which is printed with 3D Printing PLA material. The data collection was implemented on the wind speed of 1 m/s to 5 m/s. The results of this research is the wind turbine that used 5 blades produced the highest power of 9.22 Watt at 24v loading and had the highest power performance value of 0.241 at maximum wind speed of 5 m/s. The number of blades and wind speed and loading could affect the electrical power produced by the turbine, the more blades and the higher the wind speed, the greater the power generated by the turbine.]]>
<![CDATA[Analisis Pengaruh Nanofluida TiO2-(Air-Propilen Glikol) Pada Sistem Pendingin Terhadap Kinerja Sistem Pendingin dan Daya Listrik yang Dihasilkan oleh Micropower Generation ]]>
<![CDATA[M. Ferry Teguh Santoso]]>;
<![CDATA[Herman Saputro]]>
<![CDATA[ Nozel : Jurnal Pendididikan Teknik Mesin Vol 7, No 4 (2025) ]]>
Publisher : <![CDATA[Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta ]]>
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DOI: 10.20961/nozel.v7i4.105161
<![CDATA[An The use of Micro Power Generation (MPG) or small-scale power plants based on micro combustion using the Thermoelectric Generator (TEG) converter type. This study aims to determine the performance of the TiO2 nanofluid cooling system with the basic fluid of water-propylene glycol mixture on the performance of the cooling system in this case, namely temperature and viscosity, as well as the electric power generated by MPG. The research method used is the experimental method. The variables used are variations in the concentration ratio of the mixture of water with propylene glycol which is used as the base fluid for TiO2 nanofluids in the cooling system. The variation of the ratio used for the mixture of propylene glycol and water is 25%: 75% with a total volume of 2.4 L of cooling fluid and 96 grams of nanoparticles. Tests were carried out by combustion in a double meso vortex combustor with propane gas fuel and air. Then the flame is stabilized with a mass flow meter. The temperature of the hot side and cold side of the TEG is measured using a thermocouple to produce a temperature difference (∆T) between the two sides. While the resulting output in the form of voltage (Volt) and current (Ampere) is measured with a multimeter and then accumulated in the form of Power (Watt). The results of the study were taken on average produced by nanofluid variations with 25% propylene glycol and 75% water base fluid of 7.08 watts. The average hot side is 148.35 °C, the average cold side is 36.20 °C with the highest voltage of 9.24 V, and an electric current of 0.77 A. This shows that there is an effect of TiO2-(water-propylene glycol) nanofluid in the cooling system on the performance of the cooling system and the electric power generated by the micropower generation.]]>
<![CDATA[PENGARUH MEDIA PENDINGIN PADA PENGELASAN BAJA S45C MENGGUNAKAN METODE PENGELASAN GAS METAL ARC WELDING TERHADAP KEKERASAN DAN STRUKTUR MIKRO ]]>
<![CDATA[Rachmadani Rachmadani]]>;
<![CDATA[Suharno Suharno]]>;
<![CDATA[Herman Saputro]]>
<![CDATA[ Nozel : Jurnal Pendididikan Teknik Mesin Vol 2, No 1 (2020) ]]>
Publisher : <![CDATA[Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta ]]>
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DOI: 10.20961/nozel.v2i1.43237
<![CDATA[This study aims to determine the effect of cooling media on microstructure and hardness values on alloy steel S45C using the welding method of Gas metal arc welding (GMAW). This research is using an experimental method. The data analysis technique used is descriptive comparative. The tool used for microstructure testing is Olympus Metallurgical Microscope and hardness test using the Vickers Hardness Tester. Based on the results of the study, it can be concluded that the results of the microstructure show an increase in the structure of pearlite after welding. In raw material, ferrite structures are seen evenly but in the welding results, GMAW which has cooled by using water, air, and oil cooling media show that ferrite is reduced in each specimen, so the pearlite structure dominates. The values of hardness and microstructure in the welding results using water, oil and aircooling media show differences in the level of hardness and microstructure. Specimens with water cooling media at the Heat Affected Zone (HAZ) test point have a higher hardness level of 315.4 VHN when compared to specimens using an oil cooling medium of 268.7 VHN and air conditioning media of 177.4 VHN. Specimens with water cooling media the microstructure in the Heat Affected Zone (HAZ) section showed more pearlite which was evenly distributed compared to specimens using other cooling media, or it could be concluded that the further away from the Las area and HAZ the smaller the pearlite content. This study shows that welding using variations in cooling media changes the microstructure and influences the hardness value of the S45C steel alloy]]>
<![CDATA[Analisis Kinerja Buck Boost Converter LTC3780 Pada Sistem Micro Combustion Untuk Pengisian Baterai Lithium ]]>
<![CDATA[Arrafi Nur Hidayatullah]]>;
<![CDATA[Herman Saputro]]>
<![CDATA[ Nozel : Jurnal Pendididikan Teknik Mesin Vol 7, No 4 (2025) ]]>
Publisher : <![CDATA[Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta ]]>
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DOI: 10.20961/nozel.v7i4.105162
<![CDATA[The use of electronic devices or equipment is inseparable from daily life, which contributes to the increasing demand for electrical energy. The growing electricity consumption in Indonesia encourages many people with various creative ideas to develop tools or generate electricity independently by utilizing existing energy sources. One solution for supplying electrical energy is micro-scale power generation (micropower generation). In this context, the converter module used is a Thermo Electric Generator (TEG). TEG can generate electrical voltage proportional to the temperature difference between the hot and cold sides. The heat source is obtained from the combustor, while the cooling temperature is provided by a cooling system. One of the solutions to stabilize the electrical energy produced by the TEG is to use a buck-boost converter. This research aims to analyze the performance of the LTC3780 buck-boost converter concerning the electrical energy produced by the micropower generation system for battery charging and to determine the efficiency of the LTC3780 buck-boost converter for lithium battery charging with various cell configurations. This research employs a quantitative descriptive data analysis technique combined with a comparative approach. The results of this study indicate that the use of the LTC3780 affects the voltage stability during battery charging, and the number of battery cells also influences the output voltage of the LTC3780. The 3-cell configuration provides the highest and most consistent output voltage throughout the testing period. Furthermore, battery charging efficiency tends to be more optimal with fewer battery cells, particularly in the 1-cell and 2-cell configurations. Conversely, the greater the number of cells used, the lower the charging efficiency tends to be.]]>
