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All Journal Buletin Udayana Mengabdi Rotasi Rekayasa Mesin Dinamika : Jurnal Teknik Mesin LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Jurnal Rekayasa Mesin Turbo : Jurnal Program Studi Teknik Mesin SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat Jurnal Mesin Nusantara Jurnal Inovasi Teknologi Terapan
Jahirwan Ut Jasron
Universitas Nusa Cendana
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Perencanaan Turbin Wells Sistem Osilasi Kolom Air pada Pembangkit Listrik Tenaga Gelombang Laut dengan Kapasitas 10 kW Tae, Valens; Jasron, Jahirwan Ut; Nurhayati, Nurhayati; Koehuan, Verdy Ariyanto
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 2 No 2 (2015): Oktober 2015
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (130.833 KB) | DOI: 10.35508/ljtmu.v2i2.502

Abstract

Abstrak Sistem konversi energi gelombang laut menjadi energi listrik mengakumulasi energi gelombang laut. Salah satu teknologi sistem konversi energi gelombang laut adalah teknologi osilasi kolom air. Prinsip kerja dari osilasi kolom air adalah membangkitkan listrik dari naik turunnya air laut akibat gelombang laut yang masuk ke dalam sebuah kolom osilasi. Naik turunnya air laut ini akan mengakibatkan keluar masuknya udara di saluran pada bagian atas kolom air dan tekanan yang dihasilkan dari naik turunnya air laut dalam kolom tersebut akan menggerakkan turbin. Tujuan dari penelitian ini adalah melakukan perencanaan turbin Wells sistem osilasi kolom air dengan kapasitas 10kW pada pembangkit listrik tenaga gelombang Laut di Perairan Laut, Pantai Motadikin. Dari hasil perhitungan besarnya daya listrik yang dihasilkan gelombang laut dengan penggunaan PLTGL-OWC dengan daya terkecil sebesar 26.686,96 Watt di bulan Desember, sementara daya sebesar 3.762.948,04 Watt di bulan Maret dan April. Sedangkan untuk penggunaan turbin Wells dengan simulasi yang digunakan mengahasilkan daya mekanik turbin sebesar 15031,13 Watt, dengan effisiensi osilasi kolom air 24,544%.
Analisa Potensi Gelombang Laut sebagai Sumber Energi Terbarukan Menggunakan Perangkat Oscillating Water Column (OWC) Di Wilayah Perairan Laut Timor Jasron, Jahirwan Ut; Mangesa, Daud P.; Boimau, Kristomus; Tarigan, Ben V.; Maliwemu, Erich U.K.; Salombe, Mexin
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v9i01.7269

Abstract

An in-depth study is needed on the use of alternative energy to overcome human energy needs. This study aims to analyze the potential of ocean wave energy that can be converted by the "Oscillating Water Column" device on the Kolbano coast as a renewable energy source. Kolbano Beach is located in Kolbano Village, Kolbano District, and TTS Regency (South Central Timor) East Nusa Tenggara Province with an area of​approximately 17 sq km stretch of Kolbano beach area facing the Indian Ocean so that the consistency of the wave height produced is quite large. The wave height is large enough to be used as an alternative power plant. This research was conducted in Kolbano coastal waters, data on wave height and wind speed from BMKG (Metrology, Climatology, and Geophysics Agency) Kupang City in 2019 – 2021m with wave heights ranging from 0.31 to 2.3 m and wind speeds ranging from 1 .05 to 8.48 Watts.
Analisis Gas Hasil Pembakaran Tungku Gasifikasi Tongkol Jagung Adoe, Dominggus G. H.; Jasron, Jahirwan Ut; Nahak, Jufrianus Aven; Riwu, Defmit B.N.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v9i02.8889

Abstract

As an agricultural country, Indonesia has an abundant biomass energy source. One of the potential agricultural wastes to be processed into alternative fuels is corn cobs. Therefore, the purpose of his study was to compare the mass of corn cobs, namely 4 kg, 8 kg, and 12 kg, to gas produced by gasification at a temperature of 100-180 ºC. The results of the study showed that the gas produced by gasification of corn cobs with a mass of 4 kg, 8 kg, and 12 kg had a percentage of gas that tends to decrease with increasing fuel mass, namely 8 kg and 12 kg, the decrease caused by several factors, including the relative moisture content, high and low combustion temperatures. And the efficiency resulting from the combustion of the gasification furnace with mass variations, namely: 4 kg = 96,8843 %, 8 kg = 88,1387 % dan 12 kg = 88,1485%.
Analisis Kandungan Hasil Proses Gasifikasi Sekam Padi Sanusi, Arifin; Jasron, Jahirwan Ut; Tamonob, Kristoforus
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v9i02.8921

Abstract

Rice husk biomass can be converted into renewable energy. Energy can be obtained by burning biomass directly, pyrolysis (without oxygen), or gasification (with limited oxygen) to produce liquid or gas fuel. Gasification is burning solid fuel in a gasifier container to produce gaseous fuel (syngas). This research was conducted by varying the mass of rice husk fuel to the gas produced by gasification. This study aimed to determine the effect of the mass of rice husk fuel on gas from gasification and the effect of gas from gasification of rice husk combustion on thermal efficiency. The results of the combustion of the gasification furnace show that the more rice husk mass, the more gas will be produced. Based on the thermal efficiency calculation results, a mass of 5 kg rice husk becomes 302.69%, and a mass of 10 kg rice husk becomes 250.75%, while a mass of 15 kg rice husk becomes 129.38%.
Analisis Perubahan Tekanan Udara Perangkat Oscillating Water Column dengan Metode phi-Buchingham Kasi, Paulinus Sargius; Jasron, Jahirwan Ut; Gurnawati, Gurnawati
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 10 No 01 (2023): April 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v10i01.11051

Abstract

ABSTRACT The increase in human population along with the times and technology must be increasingly difficult to separate from energy needs, one of which is the need for electrical energy. One source of energy that has not been widely utilized is ocean wave energy. Ocean wave power plants basically have a working principle, namely converting ocean wave energy (mechanical energy) into electrical energy. One of the wave energy conversion system technologies is the Oscillating water column (OWC) technology. Technology Oscillating Water Coloumn this, using the air pressure from the watertight chamber to movewells turbine This turbine will then be used to generate electricity. Forms of studies that can be carried out to study the phenomenon of changes in device air pressure Oscillating Water Coloumn is mathematical modeling. One of the mathematical modeling can be done by phi-Buchingham. Using Buckingham's Pi theorem dimensional analysis can make it easier to analyze and make experimental steps faster and more focused. Keywords: Ocean waves, Oscillating Water Coloumn (OWC), Barometric pressure, phi-Buchingham
Rancang Bangun Alat Pencetak Briket Dengan Sistem Hidrolik Nafie, Andri; Jasron, Jahirwan Ut; Tobe, Adi Y.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 10 No 02 (2023): Oktober 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v10i02.14107

Abstract

Briquettes are an alternative energy source to replace dependence on fossil fuels such as kerosene. However, in the process of making briquettes, there are still obstacles. The printing process still uses traditional methods, and the existing briquette printing equipment is also not equipped with a hydraulic system and pressure gauge, so it requires more printing time. It cannot know how much pressure is applied during printing. A briquette printing machine equipped with a hydraulic system and pressure gauge is needed to simplify the briquette printing process and save energy. The purpose of designing this briquette printing machine is to produce a press machine design with a hydraulic system equipped with a pressure gauge. The design method used in this research is an experiment using the Shigley-Mitchell method. The results of the analysis of the maximum stress of the material for 150 kg pressure on the frame 2,565x107 N/m2, the press cylinder 1,932x106 N/m2, the upper press piston 8,830x102 N/m2, the lower plunger piston 2,392x107 N/m2, and the maximum stress for the loading pressure on the connecting lever 1,433x107 N/m2, the pressing lever 2,873x108 N/m2, the material yield strength value 6,204 x 108 N/m2.
Pengaruh Variasi Putaran Motor Penggerak Terhadap Optimalisasi Kerja Pada Alat Shaking Table Sore, Agustinus Seven; Jasron, Jahirwan Ut; Pah, Jack C.A.; Sanusi, Arifin
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 01 (2024): April 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i01.14831

Abstract

Indonesia is a country rich in minerals (mining), and iron sand is a source of magnetic material. The tool usually used in iron sand processing is the Shaking Table, a vibrating sieve mechanism that is generated by the force in the rotation of the driving motor for minerals such as metal and sand. This research aims to determine the rotation of the driving motor to obtain good material sieving results. From the test results of 3 kg of iron sand material, the best results were obtained at a rotation of 28.4 Rpm with the result of sieving material in the concentrate category as much as 0.55 kg and in the tailings category as much as 2.45 kg. The greater the pulley ratio, the slower the rotation that occurs on the wheel piston. On the other hand, the smaller the diameter of the pulley, the faster the piston wheel rotates to move the deck-shaking table. This occurs in accordance with the concept of moment of force, the pulley and axle are concentric wheels.
Analisis Pengaruh Variasi Tekanan Pada Briket Cangkang Kemiri Terhadap Temperatur, Laju Pembakaran Dan Kadar Abu Tonda, Naptalia; Jasron, Jahirwan Ut; Pell, Yeremias M.; Mangesa, Daud P.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 01 (2024): April 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i01.14971

Abstract

In the process of making briquettes, there are still obstacles, namely, the printing process still uses traditional methods, and the existing briquette printing equipment is also not equipped with a hydraulic system and pressure gauge, so it requires more printing time. It cannot know how much pressure is applied during printing. A briquette printing machine equipped with a hydraulic system and pressure gauge is needed to simplify the briquette printing process and save energy. The aim of designing this briquette printing machine is to produce a press machine design with a hydraulic system equipped with a pressure gauge. The design method used in this research is the Shigley-Mitchell method. This briquette press has a length of 350 mm, a width of 450 mm, and a height of 840 mm. The mold cylinder has 16 mold cylinders. In one printing cylinder, it can produce briquettes weighing 52 grams with a height of 80 mm, so in one printing, this tool, with a printing time of 6.5 minutes, can produce 0.832 kg briquettes. The capacity of this briquette press per hour is 148 briquettes/hour.
Pengembangan Alat Pencetak Pelet Untuk Pakan Ternak Dengan Skala Ekonomis Farus, Febrianus; Jasron, Jahirwan Ut; Selan, Rima Nindia; Weo, Napsiyana Asti
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 01 (2024): April 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i01.16996

Abstract

A pellet printing machine is a device specifically designed to produce pig feed using a 1 HP motor with a rotation speed of 1400 RPM. This machine is designed in a vertical form with an internal pressing screw, called a roller. The pressing screw will press the organic mixture towards the perforated printing screen with a hole size of 5 mm to form pellets. This research aims to design a pig feed machine and test its operation over a specific period. The testing of this machine involves collecting experimental data through three repetitions with a mixture weight of 5 kg, consisting of 1 kg of fish meal, 2 kg of organic waste, and 1 kg of rice bran. The collected data includes the capacity of the printed feed over a specific period and the percentage of unprinted material. The results show that the machine can produce pellets with an average effective capacity of 3733.33 g/second and an average yield of 3.33% unprinted material. The production rate achieved is 8.373 kg/hour.
Pengaruh Co-Firing Biomasa Kayu Kaliandra Dan Batu Bara Terhadap Performa Dan Emisi Gas Buang PLTU Sa’u, Putra Adhitya Frensly; Jasron, Jahirwan Ut; Sanusi, Arifin
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 2 (2024): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i2.3397

Abstract

Fossil fuels such as coal still dominate as fuel for power plants worldwide. Using fossil fuels in most power plants can increase greenhouse gas (GHG) emissions, which affect climate change. Biomass is a renewable energy source expected to reduce greenhouse gas emissions. The use of biomass energy sources as a mixture of fossil fuels, known as co-firing in power plants, has been widely done to reduce dependence on fossil fuels. This research will review the influence of biomass mixture on the efficiency of coal power plant boilers. The mixture's composition and the type of biomass used will significantly affect the Boiler's efficiency. The percentage of biomass composition, as well as the proper combustion settings, will be able to produce optimal boiler efficiency. The study in this research is expected to provide an overview of the performance of a power plant that performs co-firing so that in addition to getting the benefits of reducing greenhouse gas emissions, good boiler efficiency is also obtained.
Co-Authors A. Sanusi A. Silla, Wilson Mardianto Adi Yermia Tobe Aditya Putra Nara Aloysius Malik Koten Arifin Sanusi B.N Riw, Defmit Bale, Jefri Semuel Ben V. Tarigan bili, mario ardy Daud P. Mangesa Daud Pulo Mangesa Defmit B.N. Riwu Dominggus Godlief Heryson Adoe Erich Maliwemu, Erich Farus, Febrianus Fredrikus M. Bere Gurnawati, Gurnawati Gusnawati Gusnawati Gusnawati, Gusnawati Harun N. Beliu Hironimus R. Fao Jack C. A. Pah Jack C. A. Pah Jefri Semuel Bale Kana, Dwiyati Putri Kasi, Paulinus Sargius Kristomus Boimau Kristomus Boimau Laurensius Nogur Laurensius Nogur Lebo, Yohanes M. V. Magesa, Daud Pulo Mangesa, Daud P. Mangesa, Daud Pulo Matheus M. Dwinanto Mengga, Arisontae M. Muhamad Jafri Murizal Matasina Nafie, Andri Nahak, Jufrianus Aven Nurhayati Nurhayati Nurhayati Nurhayati Pah, Jack C.A. Pell, Yeremias M. Putra Mone, Devrith Adi Reinner Ishaq Lerrick Retebana, Imanuel Rima Nindia Selan Riwu, Demit B. N. Salombe, Mexin Sanusi, Arifin Sa’u, Putra Adhitya Frensly Seran, Yasoni Eliaser Sore, Agustinus Seven Tamonob, Kristoforus Tarigan, Ben V Tarigan, Ben V. Tobe, Adi Yermia Tonda, Naptalia Turupadang, Welem Linggi Valens Tae, Valens Verdy A Koehuan Verdy A. Koehuan Verdy Koehuan W. Bunganaen Wenseslaus Bunganaen Weo, Napsiyana Asti Wiskarjo, Marianus Yerdi B. Nitbani Yeremias M. Pell