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All Journal LONTAR Jurnal Teknik Mesin Undana (LJTMU ) at-tamkin: Jurnal Pengabdian kepada Masyarakat
Wenseslaus Bunganaen
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Agriculture, Biological Sciences & Forestry Mechanical Engineering Social Sciences Other

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Analisis Pengaruh Temperatur Dan Perlakuan Korosi Terhadap Ketahanan Putus Tabung Silinder Asetilin Bermaterial Drum Besi Bekas (Baja AISI 1045) Dominggus G. H. Adoe; Wenseslaus Bunganaen; Bahrun K. A. Mandala
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 7 No 02 (2020): Oktober 2020
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.v9i02.3344

Abstract

corrosion rate of cylinder tube materials. The temperature variations determined by the specimen were 200ºC, 250ºC and 300ºC. The specimens were subjected to corrosion treatment with Calcium Carbide (Carbide) corrosion media, then tested. The results showed that the lowest corrosion rate was the treatment specimen, namely 48.57142 mg/cm2 day, while the specimen with the highest rate was the specimen with the provisions of 70.47619 mg/cm2 day. For the tensile test, the highest value of fracture tensile stress (σp) was the untreated specimen of 243.35 MPa, while the lowest value of fracture stress (σp) was the specimen with a temperature of 300oC of 156,786 Mpa, the highest value of fracture tensile strain (ɛp) was the specimen with 300oC of 0.166875%, while the lowest value of fracture tensile strain (ɛp) is the specimen with the provision of 250 °C of 0.12025%, the highest modulus of elasticity is the specimen with the 200oC requirement of 1569.2026 MPa, while the lowest modulus of elasticity is the specimen with 300 °C of 939.5415 MPa
Studi Kinerja Teoritis Dan Konsumsi Energi Pengkondisian Udara Menggunakan R22 Dan R290 Matheus M. Dwinanto; Wenseslaus Bunganaen; Indra H. Syaifullah
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 8 No 01 (2021): April 2021
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

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Abstract

The use of more environmentally friendly hydrocarbon refrigerants in air conditioning systems has become a demand and a central issue in the future. This article presents the simulation results of the comparison of the use of R22 and R290 on the performance and energy consumption per year of air conditioning systems. The thermodynamic analysis of the system using the two refrigerants used CoolPack software version 1.50 at various evaporation temperatures, with the condensation temperature held constant. The important quantities analyzed are refrigerant mass flow rate, compressor pressure ratio, and refrigerant gas temperature leaving the compressor, heat release in the condenser, compressor power, performance coefficient, and energy consumption. The results of this study indicate that the performance and energy consumption of systems that use the two types of refrigerants basically have no significant difference. However, the R290 has a much lower compressor exit temperature which results in a longer compressor life. In addition, R290 is more environmentally friendly than R22, so the use of R290 is highly recommended.
Studi Karakteristik Aliran di Jaringan Perpipaan Menggunakan Perangkat Lunak Epanet 2.0 (Studi Kasus di Laboratorium Teknik Mesin) Kurniawan Rifai; Matheus M. Dwinanto; Wenseslaus Bunganaen
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.v8i02.6349

Abstract

Water is a basic human need both for the needs of daily life, starting from the need for drinking, cooking, and sanitation purposes. For this reason, it is necessary to plan and analyze the piping network in a building using either a gravity system or a pumping system. The mechanical engineering laboratory is one of the buildings within the Mechanical Engineering Study Program, Faculty of Science and Engineering, Nusa Cendana University which already has a piping network for distribution of clean water to the bathroom. However, until now this clean water supply has not utilized the reservoir with the existing tower near the laboratory. So, it takes software that can help, to determine the flow characteristics in the pipeline network. The piping network simulation method uses EPANET 2.0. The flow of water in the analyzed piping network is the reservoir to the bathroom. This research was conducted by analyzing the head and pressure in the piping network that will be installed in the Mechanical Engineering Laboratory using EPANET 2.0 software and analyzing losses in the pipeline network based on EPANET 2.0 software. The stability of the distribution of clean water, and the analysis period was carried out for 8 hours (extended period) with the condition of the water flow in each pipe in an open condition
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.
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
Simulasi Termodinamika Pengaruh Temperatur Subcooling di Kondensor Terhadap Kinerja Cold Storage wenseslaus bunganaen
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 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.v9i02.9365

Abstract

Temperatur subcooling di kondensor dapat mempengaruhi kinerja sistem refrigerasi secara keseluruhan. Salah satu sistem refrigerasi yang memegang peran penting dalam rantai dingin produk perikanan adalah cold storage. Makalah ini membahas studi termodinamika tentang pengaruh temperatur subcooling kondensor terhadap kinerja cold storage yang beroperasi berdasarkan siklus refrigerasi kompresi uap berdasarkan perangkat lunak CoolPack. Temperatur subcooling yang divariasikan adalah 5 – 10 Kelvin, dan parameter kinerja sistem yang dianalisis adalah laju aliran massa refrigeran, pelepasan kalor di kondensor, daya kompresor, dan koefisien kinerja sistem. Hasil studi ini menunjukkan bahwa dengan meningkatnya temperatur subcooling maka laju aliran massa refrigeran semakin berkurang sehingga daya kompresor dan laju pelepasan kalor di kondensor juga berkurang. Dengan demikian maka koefisien kinerja cold storage akan meningkat seiring dengan meningkatnya temperatur subcooling.
Co-Authors Bahrun K. A. Mandala Benediktus Sori Odjan Dominggus Adoe, Dominggus Indra H. Syaifullah Kristomus Boimau Kurniawan Rifai Matheus M. Dwinanto Muhamad Jafri Verdy A Koehuan Yeremias M. Pell Yeremias M. Pell