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All Journal Traksi : Majalah Ilmiah Teknik Mesin Rotasi Jurnal Teknik Rekayasa Mesin LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Indonesian Journal of Science and Technology JMPM (Jurnal Material dan Proses Manufaktur) Turbo : Jurnal Program Studi Teknik Mesin Machine : Jurnal Teknik Mesin SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan at-tamkin: Jurnal Pengabdian kepada Masyarakat Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat Jurnal Fisika : Fisika Sains dan Aplikasinya ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Pengabdian Vokasi Jurnal Polimesin
Muhamad Jafri
Universitas Nusa Cendana
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Karakteristik Tabung Udara Pada Pompa Hidram Muhamad Jafri
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 5 No 1 (2018): April 2018
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The purpose of this paper is to provide the fact that the air tube of a hydram pump. The method used in making this paper is to collect several published research articles on the effect of using an air tube on a hydram pump. The data obtained were analyzed to get air tube water on the hydram pump. The results of the analysis show that the use of an air tube has a good effect on improving the performance of the hydram pump. The greater the volume of the air tube, the higher the discharge air and the higher the pump efficiency.
Analisis Pengaruh Panjang Sirip Heatsink Terhadap Produksi Air Kondensasi pada Alat Pengahasil Air Atmosfir Erkes Lodoh; Muhamad Jafri; Ben V. Tarigan
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 8 No 01 (2021): April 2021
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/ljtmu.v8i01.4758

Abstract

This study aims to determine the effect of heat sink fin length oriented at 700 on the production of atmospheric air condensation water. The method used is an experimental method of 3 converters with variations in the length of the heat sink; 8 cm, 10 cm and 12 cm. The three sizes of these heat sinks are that the length of the heat sink affects the distribution of environmental temperature, the temperature on the cold side of the heat sink, the temperature on the hot side of the heat sink, the temperature in the condensing chamber and the volume of condensed water. From the third study, the best size was the length of the 12 cm heat sink with a water production of 26.9 ml/24h.
Pengujian Rumah Pengering Daun Kelor Dengan Efek Rumah Kaca (Solar Dryer) Melalui Mekanisme Konveksi Alamiah Aloysius V.P. Piamat; Verdy A. Koehuan; Muhamad Jafri
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 8 No 02 (2021): Oktober 2021
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/ljtmu.v8i02.5941

Abstract

This research was conducted by experimental study of moringa leaf drying process using ultra violet plastic dryer house (UV solar dryer) through natural convection drying mechanism. The results showed that the final water content of moringa leaves after drying for two days (8 hours) was 54.88 %bb with a total drying rate of 0.417 kg/hour from the assumed initial water content of 80 %bb. While the average drying efficiency of 3.49 % with specific energy consumption (KES) is quite high, which is 127180.77 kJ/kg. The highest specific energy consumption (KES) occurred on the 2nd day test at 200056.37 kJ/kg with the lowest efficiency of 2.154 %, while the lowest KES on the 1st day test was 54305,17 kJ/kg with the highest efficiency of 4.83 %. This phenomenon is very clear the influence of changing environmental weather on the drying process in the drying house. Environmental weather is very influential on the process of drying moringa leaves with a natural convection mechanism using ERK type dryer. Cloudy weather with high humidity will increase the humidity in the dryer house through the water vapor content in the air that enters through the air ducts
Karakteristik Massa Katup Limbah dan Tinggi Angkat Terhadap Efisiensi Pompa Hidram 3 Inci Muhamad Jafri; Nurhayati; Dominggus G. H. Adoe; Gusnawati
Jurnal Teknik Vol 18 No 2 (2020): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v18i2.131

Abstract

The research aim was to analyze the effect of the wastevalve mass and the deliver head on the hydram pump efficiency. The method used is the experimental method for the 3-inch hydram pump specimen, then analyzed using mathematical equations in the theory of the hydram pump on the head loss and pump efficiency. The data measured are the inflow, wastewater, and hydram pump outflow. The independent variables in this study were the wastevalve mass, namely 1.5 kg, 2.0 kg, 2.5 kg, and 3.0 kg, and deliver head, namely 3 m, 5 m, and 7 m. The results showed that the wastevalve mass and deliver head an effect on the hydram pump efficiency. The highest efficiency of the hydram pump is at a deliver head of 5 m with 1.5 kg of wastevalve mass, which is 60.60%. Meanwhile, the lowest hydram pump efficiency occurs at a deliver head of 7 m with 3.0 kg of wastevalve mass, which is 27.10%.
Pengujian Rumah Pengering Daun Kelor dengan Efek Rumah Kaca (Solar Dryer) Melalui Variasi Kecepatan Udara Verdy Ariyanto Koehuana; Kristianus Yosafat Goab; Muhamad Jafri
JMPM (Jurnal Material dan Proses Manufaktur) Vol 5, No 2 (2021): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v5i2.13899

Abstract

Proses pengeringan menggunakan pengering surya ultraviolet berupa pengering efek rumah kaca memiliki biaya operasional yang relatif rendah, sehingga berpotensi untuk dikembangkan dalam teknologi pengeringan pangan. Penelitian ini bertujuan untuk menguji parameter kinetik pengering daun kelor melalui variasi kecepatan udara keluar dari rumah pengering. Berat daun kelor yang akan dikeringkan dibagi rata ke dalam tiga rak pengering di rumah pengering dengan beban pengeringan yang sama yaitu 4,76 kg/m2. Hasil penelitian menunjukkan bahwa dengan variasi kecepatan keluar yaitu 0,5 m/s, 1,0 m/s, dan 1,36 m/s kekurangan energi panas yang cukup untuk mengubah mekanisme perpindahan panas konveksi pada pengering menjadi konveksi paksa. Sedangkan efisiensi pengeringan meningkat dengan bertambahnya kecepatan aliran keluar, karena kondisi saluran masuk yang tidak diatur sehingga aliran udara masuk yang membawa uap air (terutama saat mendung) meningkatkan kelembaban udara di dalam pengering. perumahan termasuk kadar air bahan dan secara bersamaan mengurangi laju pengeringan dan efisiensi rumah pengering.The drying process using an ultraviolet solar dryer in the form of a greenhouse effect dryer has relatively low operating costs, so it has the potential to be developed in food drying technology. This study aims to test the kinetic parameters of the Moringa leaf dryer through variations in air velocity leaving the dryer house. The weight of the Moringa leaves to be dried is divided evenly into three drying racks in the drying house with the same drying load, which is 4.76 kg/m2. The results showed that with variations in the exit velocity, namely 0.5 m/s, 1.0 m/s, and 1.36 m/s, they lacked sufficient thermal energy to change the convection heat transfer mechanism in the dryer into forced convection. While the drying efficiency increases with the increase in the velocity of the outflow, due to the condition of the inlet that is not regulated so that the inlet airflow carrying water vapor (especially when it is cloudy) increases the humidity of the air in the dryer housing including the moisture content of the material and simultaneously reduces the drying rate and efficiency of the dryer housing.
Pelatihan Perawatan Pompa Hidram untuk Kelompok Tani Utama Di Daerah Baumata Wenseslaus Bunganaen; Muhamad Jafri; Verdy A Koehuan; Isak S Limbong; Yeremias M Pell; Kristomus Boimau
at-tamkin: Jurnal Pengabdian kepada Masyarakat Vol. 3 No. 2 (2020): At-Tamkin - Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Islam Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/attamkin.v3i2.553

Abstract

Dry land agriculture is a crop cultivation activity carried out in moderate to severe drought conditions during most of the growing season. As a result, special cultivation techniques, types of crops and farming systems are needed to enable sustainable production. The partner involved in the Program Kemitraan Masyarakat (PKM) is a farmer group called the main farmer group. The main farmer group is located in Baumata village, Taebenu sub-district, Kupang district. This farmer group has used appropriate technology in the form of a hydram pump. The Hydram Pump, which is located in Baumata village is a product of the LP2M through the Mechanical Engineering Study Program, Faculty of Science and Engineering in 2018and is still running and is still being used by farmer groups. Based on the survey and coordination of the implementation team to the location until December 2019, it was concluded that there was a need for field activities in the context of training activities for members of farmer groups on how to repair, maintain and deal with pump problems which decrease productivity and aspects of pump work functions accordingly with a description of the report of the members of the Farmer Group.
RANCANG BANGUN LEMARI PENGERING DAUN MARUNGGA (Moringa Oleifera) Ben Vasco Tarigan; Jefri S. Bale; Matheus M. Dwinanto; Muhamad Jafri; Daud P. Mangesa; Dominggus G. H. Adoe
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 5 No 2 (2020): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v5i2.1760

Abstract

Abstrak Pohon Marungga merupakan salah satu tumbuhan yang memiliki manfaat yang besar. Untuk daunnya sendiri dapat dijakdikan menjadi suplemen gizi dan juga sebagai bahan dasar kosmetik. Daun Marungga sendiri dapat dijadikan bubuk untuk selanjutnya diproses ke dalam berbagai kebutuhan. Sebelum dijadikan bubuk, sebelumnya daun tersebut harus dikeringkan. Pengeringan manual selama ini membutuhkan waktu yang panjang dan tidak higienis. Pada penelitian ini diperoleh hasil, proses pengeringan selama 19 jam diperolehhasil penurunan kelembaban tidak bisa dilakukan secara cepat. Hal ini disebabkan karena temperatur dalam ruangan tidak mampu memanaskan udara sekitar dengan cepat sehingga proses pengeringan cenderung lebih lambat. Dengan beban pengeringan 20 kg daun Marungga mentah, diperoleh sekitar 3 kg daun kering.Kata kunci: marungga; perpindahan panas; lemari Abstract Marungga tree is one of the plants that have great benefits. The leaves themselves can be transformed into nutritional supplements and also as a cosmetic base ingredient. Marungga leaves themselves can be used as a powder for further processing into various needs. Before being made into powder, the leaf must be dried beforehand. Manual drying so far requires a long time and is not hygienic. In this study the results were obtained, the drying process for19 hours obtained the result of humidity reduction could not be done quickly. This is because the temperature in the room is not able to heat the surrounding air quickly so the drying process tends to be slower. With a drying load of 20 kg of raw Marungga leaves, about 3 kg of dried leaves are obtained.Keywords: marungga; heat transfer; cabinets
OPTIMALISASI PENERIMAAN INTENSITAS CAHAYA MATAHARI PADA PERMUKAAN PANEL SURYA (SOLAR CELL) MENGGUNAKAN CERMIN Soni A Kaban; Muhamad Jafri; Gusnawati Gusnawati
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 5 No 2 (2020): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/fisa.v5i2.2243

Abstract

Abstrak Energi surya merupakan salah satu energi yang bias dikonversi menjadi energi listrik dengan menggunakan panel surya (photovoltaic solar). Pada penelitian ini, dirancang panel surya dengan cermin datar sebagai reflektor scanning dengan empat buah reflektor pada empat sisi panel surya. Tujuan yang ingin dicapai dalam penelitian ini yaitu untuk mendapatkan keluaran panel surya yang optimal menggunakan cemin sebagai media reflektornya dan mendapatkan konfigurasi penempatan cermin untuk meningkatkan keluaran arus dan tegangan panel surya. Metode yang digunakan dalam penelitian ini adalah metode eksperimen dengan melakukan percobaan terhadap objek bahan penelitian dengan kemiringan reflektor cermin 30o, 45o, dan 60o. Dengan penambahan reflector cermin pada panel surya menyebabkan peningkatan keluaran panel surya pada pukul 12.00 Wita. Panel tanpa reflektor mengahasilkan Arus 2,1 Ampere, Tegangan 6,52 Volt. Panel reflektor 30o menghasilkan Arus 1,89 Ampere, Tegangan 6,25 Volt, Panel reflektor 45o, Arus 2,33 Ampere, Tegangan 6,15 Volt dan Panel reflektor Arus 3,02 Ampere, dan Tegangan 6,41 Volt.Kata kunci: Energi; fotovoltaik; panel surya; cermin. Abstract Solar energy is one of the energies that can be converted into electrical energy using solar panels (photovoltaic solar). In this study, a solar panel with a flat mirror as a scanning reflector was designed with four reflectors on the four sides of the solar panel. The objectives to be achieved in this study are to obtain optimal solar panel output using the mirror as a reflector medium and obtain a mirror placement configuration to increase the current and voltage output of the solar panels. The method used in this research is an experimental method by conducting experiments on the object of the research material with a mirror reflector tilt of 30o, 45o, and 60o. With the addition of a mirror reflector on the solar panel, it causes an increase in the output of the solar panel at 12.00 GMT+08. The panel without a reflector produces a current of 2.1 Ampere, a voltage of 6.52 volts. The 30o-reflector panel produces a current of 1.89 Amperes, a Voltage of 6.25 Volts, a 450 Reflector Panel, a Current of 2.33 Amperes, a Voltage of 6.15 Volts and a Current 3.02 Amperes of Reflector Panel, and a Voltage of 6.41 Volts. Keywords: Energy; photovoltaic; solar panel; mirror
PERBANDINGAN KINERJA TEORITIS AIR BLAST FREEZER MENGGUNAKAN REFRIGERAN HIDROFLUOROKARBON DAN HIDROKARBON Yohanes Viva Servianus
Machine : Jurnal Teknik Mesin Vol 7 No 2 (2021): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v7i2.1833

Abstract

Air blast freezer telah digunakan sebagai cara pembekuan cepat di unit pengolahan ikan sebelum dibekukan untuk waktu yang lama di dalam cold storage. Untuk itu penggunaan refrigeran hidrokarbon yang lebih ramah lingkungan telah menjadi tuntutan dan isu sentral pada masa yang akan datang. Makalah ini menyajikan studi kinerja teoritis penggunaan R290 dan R600a sebagai pengganti R404A dan R507A. Kinerja teoritis sistem didasarkan pada variasi temperatur evaporasi menggunakan perangkat lunak CoolPack dengan temperatur kondensasi dipertahankan konstan. Besaran-besaran penting yang dianalisis adalah laju aliran massa, rasio tekanan, temperatur keluar kompresor, pelepasan kalor, konsumsi daya, koefisien kinerja, efisiensi refrigerasi, dan konsumsi energi. Hasilnya menunjukkan bahwa pada temperatur evaporator minimum, kinerja sistem yang menggunakan R290 dan R600a rata-rata lebih tinggi ±14% dibandingkan dengan R404A dan R507A. R290 memiliki karakteristik yang lebih dekat pada R404A dan R507A sehingga lebih sesuai menggantikan kedua refrigeran tersebut dibandingkan dengan R600a. Namun, ini adalah analisis teoritis sistem yang dapat mengarah pada kinerja yang lebih tinggi daripada kondisi normal.
Pelatihan Pembuatan Biogas dari Kotoran Ternak di Kecamatan Oebobo Kota Kupang Rima Nindia Selan; Ben Vasco Tarigan; Kristomus Boimau; Muhamad Jafri
Jurnal Pengabdian Vokasi Vol 2, No 1 (2021): Juni 2021
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (385.832 KB) | DOI: 10.14710/jpv.2021.10924

Abstract

Oebobo Subdistrict is one of the six sub-districts in Kupang City. Based on data from the City of Sanitation and Landscaping Office of Kupang City, Oebobo District is a district with the largest volume of waste every day, which is 20.68 m3/ day. This is due to the densely populated area, which is also an office, school and hospital area, as well as a traditional market. Waste dumps that occur every day are almost entirely transported to the Final Disposal Site, located in Alak District. Waste management systems that are still based on the principle of Gathering - Transport - Dispose and are entirely dependent on the presence of the landfill, it is estimated that in the next 5-10 years waste management in Kupang City will experience problems with the end of the life of the landfill, while the location of the replacement landfill is increasingly difficult to obtain in connection with limited land and increasing community resistance to the existence of landfills. The waste problem can be overcome by proper waste management, so far in Oebobo District, the organic waste does not yet have proper management, therefore with the proposed program it is hoped that waste problems, especially organic waste, can be overcome. On the other hand by making biogas from organic waste, it can also help the community's economy. The gas produced can be used as a substitute for kerosene and LPG, which are increasingly scarce and expensive in the market.
Co-Authors Alfarisi, Figo Jafri Alionvember R. Thei Aloysius Meo Aloysius V.P. Piamat Ankira E. N. Saputro Apriyanto Banamtuan Arifin Sanusi Bale, Jefri Semuel Ben V. Tarigan Ben V. Tarigan Ben V. Tarigan Ben Vasco Tarigan Ben Vasco Tarigan Charles Silla Daud P. Mangesa Defmit B.N. Riwu Djoe, Daniel Marwill Dominggus Godlief Heryson Adoe Elfridus Bruno Lake Erich Maliwemu, Erich Erkes Lodoh Fransiskus Sogen Gusnawati Gusnawati Gusnawati, Gusnawati Hairman Sahrudin Lanae Ishak Limbong Jahirwan Ut Jasron Jefri Semuel Bale Konstantianus Mone Kristianus Yosafat Goab Kristomus Boimau Kristomus Boimau Lede, Agustinus Syrillus Umbu Margaretha Kewa Unarajan Matheus M. Dwinanto Mohamad Fajri Nabuasa, Meinase K Noveryandy Muda Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati Oematan, Abraham Pardiono, Tri Ramadhani Pell, Yeremias M. Philipus Andreas Rima Nindia Selan Rimas, Dedy Isman Sakaria Koli Sanusi, Arifin Sanusi, Arifin Selan, Rima Senu, Stefanus Stef Siagian, Saut Ronny Tuah Soni A Kaban Stefanus Neno Suparlan, Maria D.C. Tarigan, Ben V Tarigan, Ben V. Verdy A Koehuan Verdy A. Koehuan Wangge, Gusti F.X. Wara Wenseslaus Bunganaen Yakub M. Lanata Yeremias M. Pell Yohanes V. Gere Zakharias S. Nady