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All Journal Rekayasa Mesin Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Sprocket : Journal of Mechanical Engineering Jurnal Visi Pengabdian Kepada Masyarakat Jurnal Polimesin

Richard A M Napitupulu

Program Studi Teknik Mesin Universitas HKBP Nommensen

Author-ID : 5305802

Arts Humanities Automotive Engineering Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences

Published : 21 Documents Claim Missing Document

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Rancangan Fasilitas Pembangkit Listrik Tenaga Sampah: Studi Kasus di Kota Medan Sumatera Utara J P Simanjuntak; Richard A M Napitupulu; Partahi Lumbangaol
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 3 No 2 (2022): Edisi Februari 2022
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

In planning a power generation system using waste as an energy source, it is necessary to conduct an initial analysis of the potential local waste available. Not all waste can be used as the source of thermal energy by burning in an incinerator. Therefore, the selection is required to obtain the suitable waste and characterization to determine the potential thermal energy content in the waste. This article aims to obtain the electrical capacity produced from local waste to generate electricity in some regions of the city of Medan. The analysis is carried out on the availability of the waste and its potential for thermal energy generated. The selected incinerator of the fixed bed type with a two-stage air supply was explained comprehensively. Minimum pollution, high thermal conversion, and ease of operation are the critical point considered for the selected incinerator. The results revealed that 50 kWe was generated from a power plant system using waste. This amount of electricity can provide electricity for 25 households in the area where the case is located. This study is expected to provide sustainable waste management to the city of Medan in converting the waste into the household electricity supply.

Laju Keausan dan Kekerasan Kampas Rem Pada Sistem Pengereman Sepeda Motor Richard A M Napitupulu; Charles S.P Manurung; Chossi Sembiring
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 4 No 1 (2022): Edisi Agustus 2022
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

The braking system is a very important mechanism on the vehicle as a safety tool and ensures a safe vehicle. One of the most important parts of the braking mechanism is the brake lining. The influence of material selection, working conditions in the braking process can affect the wear of the brake lining, which has an impact on the life of the brake lining and the hardness of the brake lining. This study varies the working pressure of the braking process from 5, 10 and 15 psi, and compares 8 types of aftermarket brake lining samples with genuine part brake linings. And the results show that in this case it is known that the average hardness of non-genuine aftermarket brake wear is lower than that of aftermarket genuine ones and the wear rate of non-genuine brake lining materials is lower.

Pengeringan Kopi Arabica Sistim Terintegrasi Penyimpanan Termal Dengan dan Tanpa Desikkan Parulian Siagian; Richard A M Napitupulu; Siwan P Peranginangin
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 4 No 1 (2022): Edisi Agustus 2022
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Penelitian ini mengkaji dan meniliai keefektifan pengering surya yg kontiniu dan terintegrasi dengan pengeringan penyimpanan panas dikombinasikan dengan molekuler13 (Na86 [(AlO2)86 (SiO2)106] 264H2O) sebagai penahan kelembapan. Hasil menunjukkan pada kondisi terik matahari, temperature didalam ruang pengering cenderung berbeda antara 42.100C-46.600C dan rata rata 6.700C -11.180C diatas tempratur ambient, rata rata kelembapan 68.94% dengan rata rata kecepatan udara 1.16m/s. Pengeringan konvensional membutuhkan waktu selama 5 hari dengan temperatur maksimum 35.420C pada rata rata kecepatan angin 0.7m/s. Waktu pengeringan dengan menggunakan desikkan dan tanpa menggunakan desikkan adalah 35 jam dimana bobot 8.207.kg pakai desikkan dan bobot 8.370.kg tanpa desikkan dengan kadar air 13%, sementara pengeringan konvensional membutuhkan waktu 120 jam atau 5 hari dengan suhu maksimum 35.420C dan suhu rata rata 29.700C. Mutu aroma kopi oleh tim teaster bahwa yang memakai desikkan cenderung aroma aromatic better dan coklat, caramel serta rasa pahit yang kuat, sementara tanpa desikkan ada rasa pahit agak lemah dan rasa defect

Pengerasan Permukaan Baja Karbon Rendah Melalui Proses Pack Carburizing Dengan Menggunakan Arang Cangkang Kemiri Richard Alfonso Napitupulu; Maruba Manurung; Charles S.P. Manurung; Siwan Edi Peranginangin
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 4 No 2 (2023): Edisi Februari 2023
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v4i2.919

The easiest and most frequently used way to increase the surface hardness of the steel while maintaining its inner ductility is the Pack Carburizing process. By using a carburizer from candlenut shell charcoal as a carbon source, sodium carbonate as a catalyst and SAE 20 oil as a cooling medium. The research variables were T1 = 850o C, T2 = 900o C, T3 = 950o C, T4 = 1000o C while the holding time used was 120 minutes. The highest hardness from the research results was found at T3 900o C = 543.8 HV followed by T2 950o C = 542.8 HV, T1 850o C = 529.2 HV, and T4 1000o C = 527.4 HV

Analisa Kebutuhan Energi Termal Pada Kotak Pengering Biji Kopi Arabica yang di Isolasi dengan Aluminium Foil Parulian Siagian; Richard A. M. Napitupulu; Miduk Tampubolon; Lestina Siagian
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 4 No 2 (2023): Edisi Februari 2023
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v4i2.946

The experiment test was carried out to obtain the composition of the caloric quality needed to determine the water content and the mass amount of coffee beans when they were dried by utilizing the sun's heat. Heat transfer processes by convection, conduction and radiation play an important role in the drying process with heat quality. Ambient temperature data of 350C with a constant fan rotation speed of 1.0m/s. The duration of the test is 5 days where the initial sample weight is 5000gr with the final result being a water content of 12-15%, with a duration of testing per day for 10 hours starting at 08.00-18.00Wib. The final drying weight of coffee beans for 5 days is: 2500.21gr with an initial weight of 5000kg. The temperature difference around the box is 31,110C. heat weight to evaporate water content Qh= 65.6058.kJ. and the heat required in heating the Coffee beans is 72,839 kJ. The ability to dry 5000gr of coffee beans requires total heat: 138.43kJ with a drying box volume of 8.88m3.

Proses Pack Carburizing Baja Karbon Dengan Arang Kayu dan Arang Tulang Sapi Richard A. M. Napitupulu; Surianto Lumbantobing; Charles SP Manurung
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 9 No 1 (2023)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/METTEK.2023.v09.i01.p02

Karburisasi adalah salah satu proses yang paling banyak dilakukan pada perlakuan pengerasan di daerah permukaan baja. Proses ini selain meningkatkan kadar karbon juga sebagai langkah awal dari proses pengerasan pada permukaan sehingga material baja memiliki kombinasi sifat keras di bagian luar dan tetap ulet di bagian dalam. Penelitian ini dilakukan untuk meningkatkan kadar karbon pada baja dengan sumber karbon yang berasal dari arang kayu dan arang tulang sapi. Pada kondisi awal, spesimen memiliki kekerasan pada bagian diameter terluar 187,909 HV, komposisi karbon sebesar 0,18%C. Spesimen dipanaskan hingga temperatur 9000C dengan variasi waktu penahanan 30, 45 dan 60 menit dan masing-masing variabel diberi sumber karbon dari arang kayu dan arang tulang sapi yang diharapkan dapat berdifusi di permukaan baja. Kekerasan yang paling meningkat adalah pada spesimen dengan waktu penahanan 45 menit dan sumber karbon dari arang kayu dengan angka kekerasan 734,38 HV dan kadar karbon 0,201 % C. Secara umum terjadi peningkatan kekerasan dan kadar karbon akibat adanya difusi atom C yang berasal dari arang, namun juga terdapat adanya penurunan kadar karbon di permukaan yang dapat disebabkan oleh karena waktu penahanan yang berlebih atas dimensi spesimen. Carburizing is one of the most widely used processes in hardening treatments in the steel surface area. This process in addition to increasing the carbon content is also the first step of the surface hardening process so that the steel material has a combination of hard properties on the outside and remains ductile on the inside. This research was conducted to increase the carbon content of steel with carbon sources derived from wood charcoal and beef bone charcoal. In the initial conditions, the specimen has a hardness at the outer diameter of 187.909 HV, the carbon composition is 0.18%C. The specimens were heated to a temperature of 9000C with variations in holding times of 30, 45 and 60 minutes and each variable was given a carbon source from wood charcoal and beef bone charcoal which were expected to diffuse on the steel surface. The most increased hardness was in specimens with a holding time of 45 minutes and carbon source from wood charcoal with a hardness number of 734.38 HV and a carbon content of 0.201 % C. In general, an increase in hardness and carbon content was due to the diffusion of C atoms from charcoal, but there is also a decrease in the carbon content on the surface which can be caused by excessive holding time on the dimensions of the specimen.

ANALISIS TEKNO EKONOMI ATAP SURYA STUDI KASUS DI KOTA MEDAN, INDONESIA Wilson Sabastian Nababan; Suriady Sihombing; Siwan Ediamanta Peranginangin; Richard A.M Napitupulu
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 5 No 1 (2023): Edisi Agustus 2023
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v5i1.1197

Indonesia has released its pledge on reducing Greenhouse Gas (GHG) emissions. Mitigation measures include increasing the use of renewable energy. Solar roofs are one potential mitigation measure to meet GHG emission reduction and renewable energy targets. As more attention is being focused on developing this renewable energy resource globally, the technical and economic assessment of this resource is critical to ascertain its feasibility. In this study, a technological and economic analysis of solar roof tops is presented. The analysis was carried out based on solar irradiation in the city of Medan, Indonesia. Solar irradiation over several days was measured. The measured data and the solar photovoltaic module panels available in the Indonesian market are used to carry out the technical analysis. Based on the technical analysis and economic analysis carried out, the economic analysis of the results of the visualization of the power produced by the PV system which was carried out for 1 year resulted in a total value of electricity of IDR 3,672,895 for the city of Medan. It is expected to provide the necessary information to build cities with low emissions. Keywords: Solar Roof, Photovoltaics, Technoeconomics

Experimental Test of the Effect of PCM Volume as Thermal Energy Storage Solar Power in Solar Cooking Units Richard A.M. Napitupulu; Siwan E.A. Peranginangin; Parulian Siagian
Jurnal Polimesin Vol 21, No 5 (2023): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i5.4266

One solution that can be taken to reduce GHG emissions is to reduce consumption of fossil fuels and replace them with renewable energy sources. Indonesia is rich in renewable energy sources, and one that has potential to be developed is solar energy. In line with Indonesia's development into a developed country, energy consumption is increasing. One of the activities that contributes to the largest energy use is cooking. The need for energy for cooking in Indonesia is large because the population and households are very large, No. 4 in the world. Solar Cooker is an alternative to reduce the use of fossil or traditional energy for cooking activities. Previous research has shown how the performance of a Solar Cooker can be improved if it is integrated with PCM thermal energy storage, making it possible to speed up cooking time, cook with low solar intensity and even make it possible to cook at night. However, the quantitative influence of the number of PCMs in a solar cooker has not been specifically explained or studied. A low quantity of PCM results in reduced performance, while a high quantity will increase the thermal load, and thus overheating. This research tested 4 units of Simple Tube type Solar Cooker with different quantities of PCM for each unit. From the results of testing the Solar Cooker with the PCM thermal Energy Storage TEST with variations in PCM volume, it showed performance in storing heat for longer even in conditions of high rainfall day and night conditions. This is shown from all observation results during the 6 days of the experiment. As evidenced by the low ambient air temperature and high humidity, especially at night, the temperature drop in the cooking vessel water is quite low. This applies to every variant. From the experimental results, it can also be seen that variants number 1 and 3, especially number 3, have quite good performance, in absorbing heat and storing heat with an outer diameter of 350 mm

Optimization of Nickel Electroplating on Low Carbon Steel for Corrosion Resistance using Immersion Corrosiontest with 3.5% NaCl Parulian Siagian; Richard A.M. Napitupulu; Eko Yohanes Setyawan; Muhammad Fakhri Amadika
Jurnal POLIMESIN Vol 21, No 1 (2023): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i1.3270

This research studied the corrosion resistance of low carbon steel that has been coated with nickel in NaCl solution by the Immersion Corrosion method with 3.5% NaCl liquid. Coating is done to increase the wear resistance of low carbon steel. The coating is done by electroplating process, with various voltages of 3V, 3.5V, 4V and 5V and the liquid is heated to a temperature of 44-60oC in the immersion time range of 30 minutes, 40 minutes and 50 minutes for each voltage variation. From the results of the study, it was found that the longer the immersion time in the electroplating process, the thicker the resulting layer with the addition of about 4 - 8µm for each difference in immersion time.

Cara pemakaian mesin cara dan perawatan Mesin Pengupas Gabah Padi kepada Masyarakat Desa Amborgan Kecamatan Porsea Kabupaten Tobasa Richard A.M Napitupulu; Perangin angin, siwan
Jurnal Visi Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2024): Jurnal Visi Pengabdian Kepada Masyarakat : Edisi Agustus 2024
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51622/pengabdian.v5i2.2447

Abstract Rice is an agricultural product that is the main consumption of the Indonesian people, especially the people of the province of North Sumatra and especially in the TOBASA area and the Amborgan Village Community, Porsea District. In an area there is usually only one unit of rice hulling machine. For the rice hulling process, most farmers do the milling at that place and often have to queue because of the many farmers who will hull the rice. Therefore, with the help of a rice hulling machine, it can make it easier for the community, especially the home industry, to speed up the rice hulling process. Therefore, the Mechanical Engineering Study Program, HKBP Nommensen University, carried out community service to the village of Amborgan Village, Porsea District, TOBASA Regency by donating and providing training on operating a rice hulling machine. The result is that the community and the district government, especially the TOBASA Regency DPRD, are very happy with this program. And the community there is helped by the tools donated by the UHN Mechanical Engineering Study Program because they can helpis the essence of all parts of a complete paper that contains 75-200 with 10pt font size and protrudes 1cm from the left margin and right margin. The abstract is written in less than half a page. Abstract written in English and Indonesian.

Co-Authors Alberto Hutauruk Charles Manurung Charles S.P Manurung Charles S.P Manurung Charles S.P. Manurung Charles S.P. Manurung Charles SP Manurung Chossi Sembiring Eko Yohanes Setyawan Frince Marbun Jesayas Sembiring Jonner Togatorop Jusuf Halawa Lestina Siagian Lestina Siagian Libianko Sianturi Lumbangaol, Partahi Maruba Manurung Miduk Tampubolon Miduk Tampubolon Muhammad Fakhri Amadika Parulian Siagian Perangin angin, siwan Perangin angin, Siwan E.A. Perangin-angin, Siwan E. Ricky Therisno Rokki Manurung Samar Tan Septiani Silitonga Septiani Silitonga Sibuk Ginting Simanjuntak, Janter Pangaduan Suriady Sihombing Suriady Sihombing Surianto Lumbantobing Sutan Simanjuntak Waldemar Naibaho Wandro Siregar Wilson Sabastian Nababan Yohanes Hutahaean Yong Song Chen

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