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Ishak S. Limbong
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Mechanical Engineering

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PERANCANGAN ALAT UJI FENOMENA ALIRAN PIPA SKALA LABORATORIUM MELKY ETYANUS MARKUS BURENI; Ishak S. Limbong; Matheus M. Dwinanto
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 01 (2025): April 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i01.15779

Abstract

ABSTRAK Praktikum merupakan bagian penting dari proses pembelajaran pendidikan tinggi bidang teknik (engineering). Praktikum bertujuan mengasah keterampilan dan memuaskan rasa ingin tahu mahasiswa, serta tempat untuk membuktikan kebenaran teori yang telah diterima mahasiswa. Jika tersedia, maka harganya relatif mahal, sehingga diperlukan upaya untuk merancang alat praktikum pengujian kerugian tekanan aliran udara dalam pipa dengan harga terjangkau dan memenuhi persyaratan. Karena ketersediaan alat yang belum ada dijurusan teknik mesin menjadi alasan utama penulis untuk melakukan penelitian ini agar kedepannya alat ini dapat digunakan sebagai media praktikum bagi mahasiswa yang membutuhkannya. Berdasarkan hasil pengujian nilai kecepatan aliran pada Pompa paralel dengan variasi bukaan katub yang dilakukan antara lain 30°, 60°, 90° didapatkan hasil dari setiap bukaan katub untuk head 30° = 47.4 m/s , 60° = 54.8 m/s, 90° =55.4 m/s. sedangkan untuk Pompa seri dengan variasi bukaan katub yang dilakukan antara lain 30°, 60°, 90° didapatkan hasil dari setiap bukaan katub untuk head 30° = 32.2 m/s, 60° = 34.8 m/s, 90° =55.4 m/s dan untuk Pompa tunggal dengan variasi bukaan katub yang dilakukan antara lain 30°, 60°, 90° didapatkan hasil dari setiap bukaan katub untuk head 30° = 31.0 m/s, 60° = 31.6 m/s, 90° = 32.2 m/s.
DESIGN AND CONSTRUCTION OF A ½ HP ELECTRIC MOTOR DRIVEN FISH MEAT SHREDDER MACHINE USING ALUMINUM FOR SMEs dandy hermanto lian; Murni pallawagau; Ishak S. Limbong; Dominggus G. H. Adoe
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 01 (2025): April 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i01.18150

Abstract

Tesis ini bertujuan untuk merancang dan membangun mesin pencacah daging ikan dengan menggunakan teknik manufaktur yang efisien. Tujuan utama dari penelitian ini adalah untuk menghasilkan mesin pencacah daging ikan yang efektif, efisien dan mudah digunakan dalam pengolahan daging ikan. Penelitian ini menggunakan metode penelitian eksperimental dengan tahapan perancangan mesin, pembuatan prototipe, pengujian dan evaluasi. Perancangan mesin ini dilakukan dengan mempertimbangkan faktor ergonomi, keamanan dan efisiensi produksi. Hasil pengujian menunjukkan bahwa mesin pencacah daging ikan yang dirancang memiliki efisiensi tinggi dan dapat menghasilkan daging ikan yang bersih dan berkualitas tinggi. Mesin ini juga mudah dioperasikan dan dirawat. Kesimpulannya, mesin pencacah daging ikan yang dirancang dengan menggunakan teknik produksi yang efisien dapat meningkatkan produktivitas dalam pengolahan daging ikan. Mesin ini dapat digunakan oleh usaha kecil dan menengah untuk meningkatkan kualitas dan kuantitas produksi mereka. Kata kunci: Mesin pencacah ikan
Rancang Bangun Emergency Changer Station Di Pantai Panmuti Desa Noelbaki Theodorus De Rodath Kefi; Ishak S. Limbong; Yeremias M. Pell
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 01 (2025): April 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i01.20008

Abstract

This research focuses on the design and construction of a solar-based Emergency Charger Station at Panmuti Beach, Noelbaki Village, to meet the power needs of tourists who experience limited access to electricity. This system is designed with two monocrystalline solar panels with a maximum power of 50 WP connected in parallel, producing a total power of 100 W with a voltage of 17.2 V. The design includes measuring the intensity of solar radiation, calculating the power of the solar panels, the capacity of the Solar Charge Controller (SCC), and battery capacity. The battery with a total capacity of 36 Ah at 12 V allows daily energy storage of 800 Wh at an optimal sunlight intensity of 8 hours per day. Test results show that this system is effective in providing power to tourists' cellphones, although its efficiency is limited due to limited battery capacity. It is recommended to increase battery capacity and consider adding solar panels to increase the efficiency and sustainability of power supply at this tourist location.
Analisis Kualitas Bahan Bakar Marine Fuel Oil (MFO) Hasil Separasi pada Pembangkit Listrik Tenaga Diesel PT. Cogindo Daya Bersama – Kupang NTT Filisianus Lende; Ishak S. Limbong; Wenseslaus Bunganaen
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.27054

Abstract

Analysis of the quality of marine fuel oil (MFO) from the separation process at the diesel power plant of PT. Cogindo DayaBersama Tenau is needed to increase the calorific value of the MFO. Tests were conducted using a bomb calorimeter to calculate the energy capacity value, a centrifuge to determine the sediment volume, and observations made using a microscope to investigate the particles in the MFO. The test results (using a bomb calorimeter) showed that the energy value of the MFO that had not been separated and that had been separated was 7,776 cal/g and 8,298 cal/g (6.71% greater). The test results (using a centrifuge) also showed that the average sediment volume value of the MFO fuel that had not been separated and that had been separated was 6,273 cm³ (96.67% sediment) and 0.216 cm³ (3.33% sediment). Microscope observations showed that separated MFO was superior to unseparated MFO, as it contained more particles than unseparated MFO. These results indicate that the MFO separation process at PT Cogindo Daya Bersama has been carried out effectively
Alat Penggorengan Abon Ikan Berpenggerak Motor Listrik 200 Watt Yohanes T. Luluk; Ishak S. Limbong; Jack C.A. Pah; Murni Pallawagau
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.27056

Abstract

Fisheries play a crucial role in the Indonesian economy, particularly for fishermen and coastal communities. However, fishery products such as fish floss have problems in the frying process, which requires continuous human power to stir. This research aims to design and develop a fish floss frying device powered by an electric motor with a driving power of 200 W. This tool is expected to facilitate the fish floss frying process, reduce the energy expended by the fish floss maker, and increase the efficiency of the production process. This research uses data collection methods, tool design, and tool testing. Autodesk Inventor software was used in the design stage to design the tool frame, stirrer, and pan holder. This tool includes an electric motor, gearbox, pulley, V-belt, and frying pan. Then, the tool was made using a hollow iron box, a stainless-steel pipe, and wood. This research yields a fish floss fryer equipped with an electric motor, capable of frying fish floss with a capacity of up to 3 kg. This tool can help ease the work of frying fish floss, save labour, and increase production efficiency. With a driving power of 200 W, this tool can produce good-quality fish floss
Automatic Feeder Machine with Water Filter System Untuk Budidaya Ikan Nila Golden R. Modok; Ishak S. Limbong; Verdy A. Koehuan; Murni Pallawagau
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.27057

Abstract

The fisheries sector is one of the key drivers of the Indonesian economy. One type of fish that is widely cultivated is tilapia. The market demand for tilapia is increasing annually. However, in general, tilapia farmers still employ conventional methods in fish farming, such as feeding fish and maintaining pond cleanliness. Of course, this method is more tiring and requires a lot of time. The purpose of this study is to design an automatic feeder equipped with a filter system to control fish feeding, in conjunction with a water purification system for fish ponds. The study was conducted by building an automatic feeder machine for automatic feeding and an automatic filter to control the quality of water clarity in the pond. From the test results, the amount of feed dispensed by the automatic feeder in 30 seconds, 40 seconds, 50 seconds, and 60 seconds was 142.2 g, 189.9 g, 231.8 g, and 269.2 g, respectively. The throwing distance and distribution of feed were 3 m and 70 °. The proximity sensor is used to control the availability of feed in the storage tube, providing a warning if the amount of feed is less than the minimum limit. The filter system automatically operates when the water turbidity exceeds 40 NTU
Sistem Otomasi Pengendali pH Dan Oksigen Untuk Kolam Budidaya Ikan Liberatus Liem; Ishak S. Limbong; Ben V Tarigan; Murni Pallawagau
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.27058

Abstract

In the development of fisheries, especially in tilapia cultivation, promising prospects have emerged with high market demand. However, fish farming still tends to use conventional methods that pay little attention to water quality. This deficiency can cause serious problems for fish health and quality, potentially detrimental to cultivation activities. To optimize fish growth, pH and dissolved oxygen control are necessary. This study created a microcontroller-based automation system to control pH (5-8.5) and dissolved oxygen (> 5 mg/L) in tilapia ponds. Field testing showed that the pH and dissolved oxygen sensors have low error rates of 5.07% and 4.80%, respectively. Laboratory testing showed that the system worked successfully with relative error percentage values of pH and DO testing of 5.71% and 20% of the setpoint.
Co-Authors Ben V Tarigan dandy hermanto lian Dominggus Godlief Heryson Adoe Filisianus Lende Golden R. Modok Jack C.A. Pah Liberatus Liem Matheus M. Dwinanto MELKY ETYANUS MARKUS BURENI Murni pallawagau Theodorus De Rodath Kefi Verdy A Koehuan Wenseslaus Bunganaen Yeremias M. Pell Yohanes T. Luluk