cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Muhamad Jafri
Contact Email
muhamad.jafri@staf.undana.ac.id
Phone
+6281237119375
Journal Mail Official
teknik.mesin@undana.ac.id
Editorial Address
Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Nusa Cendana, Jl. Adi Sucipto PO Box 85001
Location
Kota kupang,
Nusa tenggara timur
INDONESIA
LONTAR Jurnal Teknik Mesin Undana (LJTMU )
Published by Universitas Nusa Cendana
ISSN : 23563222     EISSN : 24073555     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Lontar Jurnal Teknik Mesin Undana merupakan jurnal ilmiah rekayasa teknologi, khususnya bidang Teknik Mesin, meliputi: Energy Convertion, Manufacture Process, Engineering Design, Material Engineering.
Arjuna Subject : -
Articles 16 Documents
 1   2 
Search results for , issue "Vol 9 No 01 (2022): April 2022" : 16 Documents clear
Analisis Performa Pompa Air DAB Tipe DB-125b Sebagai Turbin Dengan Variasi Head Dinamik Meinase K Nabuasa; Verdy A. Koehuan; Nurhayati Nurhayati; Muhamad Jafri
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
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.v9i01.7268

Abstract

The research was conducted through experiments on pumps that functioned as turbines in this study, namely regenerative pumps or peripheral pumps, namely the DAB water pump type DB-125B. Peripheral pump is a centrifugal pump whose impeller has radial blades in bulk of 41 blades. The performance or performance of the PAT system for regenerative pumps or peripheral pumps, namely the DAB type DB-125B water pump as a hydroelectric power plant, was analyzed with variations in flow rates of 35 ltr/min, 40 ltr/min, and 45 ltr/min. The performance or performance of the PAT system of regenerative pumps or peripheral pumps, namely the DAB type DB-125B water pump as a small-scale hydroelectric power plant from experimental results with variations in flow rate shows a maximum shaft power of 5.849 W with an initial discharge at no-load of 40ltr/min. The addition of water power can directly increase the rotation of the PAT shaft, as well as with the addition of the flow rate at the head, the rotation of the turbine rotor also increases. While the addition of the flow rate, the maximum output power and PAT efficiency tend to occur at higher rotations than at low flow rates. The efficiency of PAT in this flow discharge variation reaches its maximum value at turbine rotation of 850.3 rpm of 17.39%, followed by variations of flow rate of 45 ltr/min and 35 ltr/min, each of which is 11.14% at 566.3 rpm and 8.74% at 1440.7 rpm.
Analisa Potensi Gelombang Laut sebagai Sumber Energi Terbarukan Menggunakan Perangkat Oscillating Water Column (OWC) Di Wilayah Perairan Laut Timor Jahirwan Ut Jasron; Daud P. Mangesa; Kristomus Boimau; Ben V. Tarigan; Erich U.K. Maliwemu; Mexin Salombe
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
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.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.
Studi Pengaruh Rasio Tekanan Kompresor Turbocharger Terhadap Kinerja Mesin Diesel Matheus M. Dwinanto; Yeremias M. Pell; Arky B. J. Wadu
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
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.v9i01.7270

Abstract

The use of a turbocharger in large diesel engines has become a demand because it can increase engine output and efficiency by utilizing exhaust gas from combustion (exhaust gas). Turbocharger is a device to increase the intake of air into the cylinder by utilizing the energy of exhaust gases from combustion. The purpose of this study is to analyze the effect of differences in the turbocharger pressure ratio on diesel engine performance using Diesel-RK software. The diesel engine under study is model 4D56 2.5L which uses a single turbocharger with maximum power of 136 PS at 4000 rpm and maximum torque of 324 N.m at 2000 rpm. The compressor pressure ratio under study was only 1.5 and 2.5 compared to a diesel engine without a turbocharger or natural aspirated engine (NA). The engine capacity is 2477 cc, 4 cylinders, and the compression ratio is 18:1. The fuel used is SME Biodiesel (Soya Methyl Ester, C15H28) with a cetane number of 56.5. The results of this study indicate that the use of a turbocharger will lead to an increase in engine power, especially at a high compressor pressure ratio due to the larger air filling when compared to the NA diesel engine for the engine speed range of 750 rpm to 5000 rpm. For diesel engines that use a turbocharger, the BSFC will decrease with increasing engine speed.
Studi Pengaruh Temperatur Kondensasi Terhadap Kinerja Siklus Rankine Organik Menggunakan Fluida Kerja R245FA Dan R515A Jefrianto Lobo; Matheus M. Dwinanto; Nurhayati Nurhayati
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
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.v9i01.7271

Abstract

Since 2000 power plants with the organic Rankine cycle (ORC) are the most widely used in the world that utilize low-temperature heat sources such as industrial heat waste, biomass, geothermal and solar energy. The working fluid for the ORC system must meet several criteria of physical properties including, environmentally friendly, non-flammable, non-toxic, and non-corrosive. Therefore, this study aims to analyze the effect of condensation temperature on the thermodynamic performance of a standard organic Rankine cycle with turbine power of 20 kW with working fluids R245FA, and R515A. Simulation of system performance using Genetron Properties software with evaporation temperature held constant at 80oC and condensation temperature varied at 30 – 40oC. The results of this study indicate that increasing the condensing temperature greatly increases the pumping power consumption but decreases the pressure ratio in the turbine, and the thermal efficiency of the system. The pumping power used to circulate the R515A is ±2.2 times higher than that of circulating it. The thermal efficiency of the ORC system that uses the two working fluids reviewed does not have a significant difference
Pengaruh Penggunaan Bahan Bakar Biodisel Berbasis Biji Buah Nyamplung (Calophyllum Inophyllum) Terhadap Emisi Gas Buang Mesin Diesel. Pieter Y Persulesy; Basri K; Edy Suprapto
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/.v9i01.6295

Abstract

One of the energy sources used as a substitute for diesel is biodiesel, which is an energy source made from plants and animals. One of the plant species that can be developed for biodiesel in Indonesia is the Nyamplung tree (Calophyllum inophyllum). The purpose of this study was to determine the effect of using biodiesel fuel based on nyamplung fruit seed oil (Calophyllum Inophyllum) on exhaust gas emissions of CO, CO2, NOx, O2, and diesel engine opacity. The study used a non-factorial Randomized Block Design (RAK) basic pattern which was repeated 3 times, including: X1 : Pure Diesel (100%), X2 : Mixture of Diesel and 50% Biodiesel (B50), X3 : 100% Biodiesel (B100), Y : Exhaust Emissions (CO, CO2, NOx, O2 and Opacity). From the analysis of variance, it was found that the use of nyamplung seed biodiesel fuel on exhaust gas emissions of CO, CO2, NOx, O2, and Opacity had a significant effect on the 1% and 5% levels in the treatment and had no significant effect on the test group. Then it can be said that the use of biodiesel can reduce exhaust emissions.
Rancang Bangun Mesin Pencetak Pakan Ikan Menggunakan Metode VDI 2221 matias rae; Duad Pulo Mangesa; Ben V. Tarigan
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/.v9i01.6972

Abstract

ABSTRACT A reality for today's business world, that many small and medium industries and households are trying to build themselves to meet the growing need for fish feed. Based on this, it is appropriate that the production equipment owned must be optimized to support the effectiveness and efficiency of the fish feed production process. The VDI 2221 method uses a systematic approach to design for engineering systems and engineering products. This VDI 2221 method makes it easier for designers to make a product so that product design can be achieved. The author has a design to make a fish feed printing machine in the hope that it can be used as an alternative to produce products faster and more efficiently. The results of the design using the VDI 2221 method of fish feed printing machine are, using a motor power of 1 HP = 750 watts with a tool capacity of 42 kg/hour. Keywords: design, VDI 2221 method, feed printing device.
Rancang Bangun Alat Pencampur Pakan Ikan Dengan Mekanisme Sistem Gerak Rotary Menggunakan Metode VDI 2221 arianto salem; daud pulo mangesa; Erich Maliwemu
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/.v9i01.7441

Abstract

Along with the development of science and technology, this is what supports making a fish feed mixing machine. The main goal in creating this technological innovation is so that the results obtained are more effective, efficient and of high quality. The manufacture of this tool has gone through several processes of theoretical calculation of the forces that occur when the machine is working, the selection of component materials, and the process of working on then assembling the components of the machine, testing the performance of the machine according to the design with animal feed materials. In this design, the mechanical system of the fish feed mixing machine the source of the rotation is a gear motor that moves the belt and pulley which is directly connected to the reduser which then moves the Mixing shaft with chains and sprockets as an introduction. Keywords : Fish Meal, Bone Meal, Shrimp. Mixing Machine,VDI Method 2221.
Studi Kinerja Teoritis Pengkondisian Udara Menggunakan R32, R290 Dan R410a James Roland Sengge; Matheus M. Dwinanto; Adi Y. Tobe
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

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

Abstract

The use of more environmentally friendly refrigerants in air conditioning systems has become a central demand and issue in the future. This article presents the simulation results of the comparison of the use of R32 (difluoromethane), R290 (propane) and R410A (difluoromethane+pentafluoroethane) on the performance of air conditioning systems. The thermodynamic analysis of the system using the two refrigerants used the CoolTools version 1.0 software at several variations of the evaporation temperature, with the condensation temperature held constant. The important quantities analyzed are heat release in the condenser, compressor power, and coefficient of performance. The results of this study indicate that the performance of air conditioning using R290 is higher than the use of R32 and R410A while the lowest coefficient of performance is owned by air conditioning using R410A. In addition, R290 is more environmentally friendly than R32 and R410A, so the use of R290 is highly recommended
Studi Eksperimen Kinerja Penukar Kalor Kompak Sebagai Pemanas Tambahan di Rumah Pengering Hibrid Sherly Satriani Ludji; Matheus M. Dwinanto; Verdy A. Koehuan
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

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

Abstract

The process of drying a hybrid system that uses a combination of solar energy and biomass contains some useful heat in the chimney of the biomass stove. This heat waste has a high enough temperature so that with the help of a compact heat exchanger it can be used as an additional heater. The purpose of this study was to analyze the performance of a cross-flow type discrete flat plate-finned tube compact heat exchanger with an inline tube arrangement which is used as an additional heating device in the hybrid dryer housing. The test was carried out at 10.00-15.00 for three days of testing with variations in air flow velocity of 1.3 m/s, 1.6 m/s and 1.8 m/s while the velocity of water flow in the pipe was considered constant with 0.000168 m/s. s and the air flow velocity in the exhaust fan is kept constant at 1 m/s. The results of this study indicate that the overall heat transfer coefficient is strongly influenced by the effectiveness of the heat exchanger, and with the increase in the effectiveness of the heat exchanger, the heat transfer coefficient will also increase. The highest overall heat transfer coefficient was obtained on the second day, namely 99.263 W/m2.oC. The total heat transfer rate is influenced by the effectiveness of the heat exchanger but at a certain value both values ​​tend to be stable due to the limited dimensions of the heat exchanger. NTU is very influential on the effectiveness of the exchanger, and in this case the value of NTU ranges from 0.6-0.8 while the effectiveness of the heat exchanger ranges from 46%-56%
Perancangan Alat Roll Press Untuk Pembuatan Emping Jagung Kapasitas 150 Kg/Jam Menggunakan Software Solidworks Yeremias M. Pell; Benediktus Sori Odjan; Wenseslaus Bunganaen
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.1234/.v9i01.6075

Abstract

The development of machine technology that makes it easier for humans to do things more easily and quickly, encourages the world of small and medium-sized corn chip craftsmen to develop home businesses that produce corn chips using a corn chipping machine. The production process with the help of machines can accelerate human performance in carrying out activities. In this design, we will redesign the corn chip machine which already uses a motor to drive a flattened roll that can be adjusted for slack. In this design, the mechanical system of the corn chips roll press machine, the source of rotation is the motor gear that drives the belt and pulley which is connected directly to the reducer which then moves the flattened roll with a chain and sprocket as an introduction. By utilizing the rotation of the gear motor, it can move the flattening roll which will later function to take corn kernels from the inlet funnel. The constant rotation of the motor that drives the flattening roll can work to take corn kernels continuously, thus providing convenience in the process of flattening corn seeds

Page 1 of 2 | Total Record : 16

 1   2 

Filter by Year

2022 2022


Reset
Filter By Issues
All Issue Vol 9 No 02 (2022): Oktober 2022 Vol 9 No 01 (2022): April 2022 Vol 8 No 02 (2021): Oktober 2021 Vol 8 No 01 (2021): April 2021 Vol 7 No 02 (2020): Oktober 2020 Vol 7 No 01 (2020): April 2020 Vol 6 No 01 (2019): April 2019 Vol 5 No 1 (2018): April 2018 Vol 4 No 2 (2017): Oktober 2017 Vol 4 No 1 (2017): April 2017 Vol 3 No 2 (2016): Oktober 2016 Vol 3 No 1 (2016): April 2016 Vol 2 No 2 (2015): Oktober 2015 Vol 2 No 1 (2015): April 2015 Vol 1 No 2 (2014): Oktober 2014 Vol 1 No 1 (2014): April 2014 More Issue