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Muhamad Jafri
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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 216 Documents
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Modifikasi Modifikasi Rotor Pada Alat Pemecah kemiri Tipe Bentur Fallo, Florianus; Pell, Yeremias M.; Pah, Jack C.A.
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.v11i01.15715

Abstract

This article illustrates preparation of your paper using MS-WORD. Papers should not be numbered The rotor bar is part of the candlenut breaker tool that separates the candlenut flesh from the shell. On the rotor there is a candlenut seed intake groove which is adjusted to the size of the candlenut seed. These grooves will carry the candlenut seeds to rotate and collide the candlenuts on the wall of the stator bar which is attached to a wooden board as a support for grinding the candlenut seeds. The distance between the rotor and the wall must be adjusted in such a way as to get the desired results.
Perancangan dan Pembuatan Prototype Sauce Pan dengan Metode Pengecoran Yahya, Syahril Maula; Suyitno, Suyitno; Hastuti, Sri
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.v11i01.16435

Abstract

Sauce pan or commonly called pan is needed as cooking utensils. There are many sauce pan designs according to the advantages offered by a product. A sauce pan design with a minimal manufacturing process is now required. The purpose of this design is to create a sauce pan design and prototype that can be produced in one casting process between the sauce pan body and the handle connector. The sauce pan was designed using CAD and CAE software to determine the strength of the design. The prototype was made using A356 aluminum. A356 Aluminum as raw material for making sauce pan has many advantages. The strength of the sauce pan is obtained by performing a safety factor simulation with a load of 20 N. The sauce pan design has a good safety factor, with 6.8 for design 1, 4.9 for design 2, and 8.3 for design 3.
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.
The Pengaruh Fraksi Massa Tepung Terigu Terhadap Hasil Hidroksiapatit Dengan Prekursor Cangkang Bekicot Menggunakan Metode Sol-Gel Pakpahan, Greynaldi; Adoe, Dominggus G. H.; Limbong, Ishak
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.v11i01.17356

Abstract

This research aims to determine the effect of the mass fraction of wheat flour (Triticum aestivum L) on the results of porous hydroxyapatite with snail shell precursors (Lissachatina fulica). The method used in this research is the Sol-Gel method with a sintering temperature of 1000°C and a sintering time of 5 hours with a mass fraction between wheat flour (Triticum aestivum L) and snail shell powder (Lissachatina fulica) of 60%, 50%, 40%, and 100%. Density, porosity and SEM characterization tests were used in this study to determine the density value, porosity value, and pore size of the porous hydroxyapatite sample. In this density test using Archimedes' law, it shows that the four samples (A1 + B1, A2 + B2, A3 + B3, and A4) have density values of 0.145 g/cm3, 0.15 g/cm3, 0.1967 g/cm3, and 0.221 g/cm3. In porosity testing, the three samples with mass fractions between snail shell powder and wheat flour will be compared with one pure sample of only snail shell, which obtained porosity values of 34.39%, 32.13%, and 11%. Finally, the SEM characterization found that the pore size of the porous hydroxyapatite sample has a size range from 34.5228 µm - 71.7012 µm.
Studi Simulasi Pengaruh Temperatur Evaporasi Terhadap Kinerja Energi Siklus Rankine Organik dengan Fluida Kerja R245FA, R515A, dan R1233ZD Dwinanto, Matheus Magnus; Selan, Rima Nindia; Pala, Elshaday Y.
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.v11i01.17750

Abstract

Dewasa ini, siklus Rankine organik telah menjadi salah satu solusi alternatif pembangkit listrik ramah lingkungan karena dapat menggunakan sumber kalor bertemperatur rendah atau sumber kalor berdaya rendah. Namun, penggunaan fluida kerja organik yang lebih ramah lingkungan sebagai pengganti R245FA telah menjadi tuntutan pada masa yang akan datang. Oleh karena itu, penelitian ini bertujuan menganalisis pengaruh temperatur evaporasi terhadap kinerja energi siklus Rankine organik standar dengan fluida kerja R245FA, R515A, dan R1233ZD. Kinerja termodinamika didasarkan pada variasi temperatur evaporator menggunakan perangkat lunak Genetron Properties. Besaran-besaran penting yang dianalisis adalah laju aliran massa, daya pemompaan, penyerapan kalor, pelepasan kalor, rasio tekanan turbin, dan efisiensi termal. Hasil penelitian menunjukkan bahwa peningkatan temperatur evaporasi sangat berdampak pada peningkatan konsumsi daya pemompaan, rasio tekanan di turbin, dan efisiensi termal sistem. Namun, dibutuhkan daya pemompaan yang lebih besar untuk mensirkulasikan R515A dibandingkan dengan mensirkulasikan R245FA dan R1233ZD. Sistem ORC yang menggunakan R1233ZD memiliki efisiensi termal tertinggi dibandingkan R245FA dan R515A sehingga pada masa yang akan datang fluida kerja tersebut sangat cocok untuk menggantikan R245FA.
Pembuatan dan Pengujian Alat Penetas Telur Bertenaga Surya Tegangan 12V DC Nuban, Jondri K. A.; Koehuan, Verdy A.; Selan, Rima N.; Tobe, Adi Y.
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.v11i01.17756

Abstract

produce quality poultry chicks. However, the natural egg-hatching process is often less efficient and susceptible to fluctuations in environmental temperature. Therefore, to increase the efficiency and results of egg hatching, this research aims to design and test an automatic chicken egg incubator that uses solar energy. This tool is designed to consider factors such as temperature, humidity, and air circulation required for optimal egg hatching. Testing was carried out for 21 days, by monitoring environmental temperature, humidity, and temperature distribution in the egg hatching room. The test results showed that the tool was able to reach the desired temperature for hatching eggs and succeeded in hatching several eggs well, while some other eggs experienced defects or died during the hatching process. In addition, power and energy consumption analysis shows that the device has quite good efficiency in using energy, with low energy consumption to maintain the room temperature within the desired range. The solar-powered automatic egg incubator has the potential to increase the efficiency and yield of egg hatching in the livestock industry and can be an environmentally friendly alternative by utilizing solar energy which is available freely and sustainably
Uji Kinerja Mesin Perajang Singkong Menggunakan Mekanisme Pengumpan Otomatis Mantutu, Anggi R.; Mangesa, Daud P.; Tobe, Adi Yermia
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 02 (2024): Oktober 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i02.14076

Abstract

This research focuses on testing the performance of the cassava chopper machine using an automatic feeder mechanism that is applied to the cassava chopper machine to speed up the production process and improve product quality. The purpose of this research wants knowing the working principle of the cassava chopper using an automatic feeder, knowing the performance capacity of the cassava chopper using an automatic feeder, knowing the percentage of damage to the chopper and the value of the thickness of the chopper at one time of the chopping process. The research method used is a type of engine performance testing. Namely observing, measuring and calculating the performance testing of the cassava chopper machine. In collecting data for the calculation of chopping capacity and thickness of the sliced product, it was carried out by preparing 9 kg of cassava and the test was carried out 9 times using variations in the angle of the blade and 1 minute for each test. From the test results, it was found that the chopping capacity at blade setting A was 55.68 kg/hour, knife B was 57.48 kg/hour, and knife C was 59.34 kg/hour, with a slice thickness of 1-3mm.
Pengaruh Lama Waktu Pemanasan Terhadap Kadar Alkohol Moke Dengan Sistem Destilasi Sederhana Raju, Efremsus Sugianto; Riwu, Defmit B.N.; Pah, Jack C.A.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 02 (2024): Oktober 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i02.16587

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh lama waktu pemanasan terhadap kadar alkohol moke dengan sistem destilasi sederhana. Bahan baku destilasi menggunakan nira siwalan ( Borassus flabellifer linn ). Pengujian alat destilasi pada penelitian menggunakan suhu destilasi 78°C dengan variasi lama waktu pemanasan yaitu 2 jam 3 jam dan 4 jam. Metode yang digunakan dalam penelitian ini adalah metode eksperimen. Hasil penelitian menunjukkan bahwa waktu pemanasan yang lama dapat berpengaruh terhadap kadar alkohol yang diperoleh. Semakin lama waktu pemanasan kadar alkohol yang diperoleh semakin rendah. Kadar alkohol moke yang diperoleh pada penelitian ini dengan variasi lama waktu pemanasan yaitu 30% dengan lama waktu pemanasan 2 jam, 30% dengan lama waktu pemanasan 3 jam, dan 28% dengan lama waktu pemanasan 4 jam.
Perancangan Pembangkit Listrik Tenaga Air Mini Dengan Turbin Spiral sayuna, jeri imanuel; Sanusi, Arifin; Bale, Jefri S.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 02 (2024): Oktober 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i02.16907

Abstract

Mini power plants certainly need water energy as the main ingredient. Although the source of electrical energy is already quite large in Indonesia, but in the countryside it is not fully able to enjoy it, many we often find along rural roads, especially in rice fields with very minimal lighting available. The use of water as irrigation of course we can also use as a hydroelectric power plant on a small scale, by utilizing the existing water flow we can make small-scale power generation equipment that adjusts the amount of irrigation water flow of rice fields. Therefore, the results of research on making mini hydroelectric power plants with the VDI 2222 method for street lighting in rice fields can be useful in the community. This tool has the same principle
Optimasi Kompor Dengan Variasi Bahan Bakar Sonbaifeto, Dodi Alfredo; Riwu, Defmit B.N.; Tobe, Adi Y.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 11 No 02 (2024): Oktober 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v11i02.17862

Abstract

Dalam peningkatan kebutuhan energi dan kesadaran akan pelestarian lingkungan, penggunaan bahan bakar yang ramah lingkungan dan efisien menjadi penting. Penelitian ini bertujuan untuk mengembangkan kompor yang dapat menggunakan berbagai jenis bahan bakar sebagai solusi alternatif. Fokusnya adalah pada pengujian konsumsi bahan bakar dan temperatur api dari tiga jenis bahan bakar: minyak tanah, Biodiesel B30, dan minyak jelantah. Hasil pengujian menunjukkan bahwa konsumsi bahan bakar pada ketinggian penempatan tabung bahan bakar 200 cm, konsumsi bahan bakar pada bahan bakar minyak tanah sebesar 0,035 ml/s, Biodiesel B30 sebesar 0,04ml/s, dan minyak jelantah sebesar 0,03ml/s, sedangkan pada ketinggian penempatan tabung bahan bakar 160 cm, konsumsi bahan bakar pada bahan bakar minyak tanah sebesar 0,031ml/s, Biodiesel B30 sebesar 0,039ml/s, minyak jelantah sebesar 0,027ml/s, dan Temperatur api di ketinggian menaruh tabung bahan bakar di 200 cm, pada bahan bakar minyak tanah sebesar 1049°C, Biodiesel B30 sebesar 971°C, dan minyak jelantah sebesar 805°C, sedangkan, , sedangkan pada ketinggian penempatan tabung bahan bakar di 160 cm, temperatur api pada bahan bakar minyak tanah sebesar 996°C, pada Biodiesel B30 sebesar 788°C, dan pada minyak jelantah sebesar 518°C.

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