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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 16 Documents
 1   2 
Search results for , issue "Vol 9 No 02 (2022): Oktober 2022" : 16 Documents clear
Implementasi Konsep Ergonomi pada Penggunaan Alat Tenun Tradisional Rumah Tenun Kampung Sabu Rima N. Selan; Theodora M. C. Tualaka; Ariency Kale Ada Manu
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.v9i02.8325

Abstract

HIX symbolize human work from beginning to end. "X" is a variable for: design, manufacturing, test, and so on. “HI” symbolizes human integrated. Human Integrated System (HID) is a system designed with the capabilities and limitations possessed by humans so that the results of the design can increase effectiveness. Occupational diseases are caused by work and work attitudes. One of the occupational diseases of the spine is lower back pain, which arises due to a static position at work and is continuous. Every year 15%-45% of adults suffer from low back pain and generally occurs at the age of 35-55 years. The application of ergonomics is a design activity or redesign that is adapted to technological advances as well as anatomy, psychology, industrial medicine. The sitting position during the process of carrying out weaving activities which lasts a long time with a time of 8 hours per day, causes the sitting position to become less comfortable and results in complaints of pain in the back or spine. The ultimate goal of this study is to implement the concept of ergonomics in the use of traditional looms so as to reduce complaints of pain or spinal pain from weavers
Uji kinerja Alat Uji Tarik Berbasis digital Kapasitas 500 N mukhlis muslimin; Ahamad Seng; Raden Aditiya; Rudi Hartono
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.v9i02.8395

Abstract

Tujuan penelitian untuk mengetahui unjuk kerja alat uji tarik komposit, bentuk benda uji yang akan diuji adalah komposit fragmentasi. Bahan yang digunakan sebagai bahan uji adalah komposit yang menggunakan matriks resin yukalac 157 dan sabut kelapa, sebelum membuat benda uji, metode perlakuan serat dengan asap cair terlebih dahulu dilakukan dalam 2 tahap (1) perendaman serat dengan asap cair dengan variasi 1, 2, dan 3 jam (2) kemudian serat dipanaskan dalam oven pada suhu 40 derajat selama 30 menit. Hasil penelitian menunjukkan bahwa pahat mampu menarik spesimen komposit fragmentasi telah mencapai 284 N, sedangkan perlakuan asap cair pada serat sabut kelapa berpengaruh terhadap peningkatan kekuatan komposit fragmentasi, kuat tarik maksimum terjadi pada serat perlakuan P2J sebesar 39,313 MPa. Dari hasil penelitian tersebut dapat direkomendasikan sebagai alat uji fragmentasi spesimen komposit.
Pengaruh Ketebalan Briket Arang terhadap Perubahan Temperatur dan Kelembaban pada Desalinasi Surya Sistem Interfacial Heating Saut Ronny Tuah Siagian; Muhamad Jafri; Ben V. Tarigan; Defmit B. N. Riwu; Dominggus G. H. Adoe
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.v9i02.8778

Abstract

Solar desalination is the process of reducing brine salinity by using heat from the sun to produce fresh water. Distillation is one of the traditional solar desalination methods, but it has a low evaporation rate. Recently, interfacial solar evaporation by thermal localization at the liquid interface has been proposed as a promising alternative to evaporation. In this study, briquettes were investigated as as the interface solar absorber to increase vapor production. Experiments were carried out in 4 single-slope type distillers for 8 hours under clear sunlight using 10, 15 and 20 mm thick briquettes. For comparison, we also looked at distiller (basin) with no charcoal. Temperatures and humidity were measured at several position within the basin to identify factors contributing to seawater evaporation. We found that the vapor production increases when temperature is high and humidity is low. While condensation is highly dependent on humidity, high humidity is able to make water vapor molecule reach its dew point faster. This condensation process will greatly impact the productivity of the distillate.
Analisis Gas Hasil Pembakaran Tungku Gasifikasi Tongkol Jagung Dominggus G. H. Adoe; Jahirwan Ut Jasron; Jufrianus Aven Nahak; Defmit B.N. Riwu
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.v9i02.8889

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 Arifin Sanusi; Jahirwan Ut Jasron; Kristoforus Tamonob
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.v9i02.8921

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%.
Rancang Bangun Mesin Pemipil Jagung Dengan Metode VDI 2222 wenseslaus bunganaen; Yopi Toai; Daud P. Mangesa
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.v9i02.9322

Abstract

Corn farmers in general still use the traditional method of using their hands to separate the corn from the cobs, this requires more energy and time to separate the corn from the cobs. A shelling machine is needed as a means to assist farmers' needs in shelling corn to facilitate the existing shelling and save labor. The purpose of designing this corn sheller machine is to produce a design and produce a corn sheller machine for the needs of farmers in East Nusa Tenggara. The method of data collection and processing is carried out by applying the VDI (Verein Deutsche Inggenieur) 2222 method through 4 stages, namely analysis, design concept, design and embodiment. Based on the results of the planning of this corn sheller machine, the result of this corn sheller machine is that the shelled corn is clean from the corn cobs because it uses a soft material for shelling, namely rubber plucker so that it does not destroy the corn cobs.
Rancang Bangun Alat Pencacah Batang Pisang Menjadi Bahan Baku Pembuatan Pupuk Organik iwi koebanu; Yeremias M Pell; Erich U.K. Maliwemu
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.v9i02.9333

Abstract

Penelitian yang telah dilaksanakan adalah tentang “rancang bangun alat pencacah batang pisang menjadi bahan baku pembuatan pupuk organik. Tujuan penelitian ini adalah merancang bangun mesin pencacah batang pisang yang dapat mempersingkat waktu proses pencacahan dibandingkan proses pencacahan manual, untuk digunakan sebagai bahan baku pembuatan pupuk organik yang diharapkan dapat membantu masyarakat pertanian, untuk mempermudah proses produksi pencacahan batang pisang yang bisa jadi bahan untuk pupuk dengan waktu yang lebih singkat dan tenaga yang lebih efisien, dapat meningkatkan produksi pertanian baik kualitas maupun kuantitas, meningkatkan kualitas lahan secara berkelanjutan dan dapat mencegah degradasi lahan dan dapat menekan biaya operasional daripada harus membeli pupuk kimia yang relative mahal. Metode yang digunakan dalam penelitian ini adalah metode rancang bangun. Hasil penelitian menunjukan rancang bangun alat pencacah batang pisang menjadi bahan baku pupuk organik yang dirancang dan diujicoba telah berfungsi secara baik sesuai dengan hasil rancangan. Dari hasil pengujian kinerja mesin pencacah batang pisang ini memperlihatkan bahwa mesin beroperasi dengan sangat baik dalam mencacah batang pisang, dengan hasil cacahan ± 5-11 mm dan kapasitas pencacahanya adalah 98 kg/jam. Semua komponen dari mesin pencacah batang pisang ini bekerja dengan baik sesuai fungsi komponen masing-masing. Kata Kunci: Rancang Bangun, Pencacah Batang Pisang, Pupuk Organik.
Rancang Bangun Reflektor Cahaya Matahari Dengan Cermin Datar Berbasis Mikrokontroler Untuk Alat Solar Pasif Desalinasi Yeremias M. Pell; MAIKEL WAHYUDI BOYMAU; Ben V. Tarigan
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.v9i02.9334

Abstract

The research has been conducted on design solar light reflector with flat mirror based on microcontroller for passive solar desalination device. The purpose of this research is to design solar light reflector using flat mirror based on microcontroller for passive solar desalination device that can function properly so that it can be used by coastal communities who need fresh water. The method used in this research is design. This research was started by design the reflector and reflector frame, design the servo mount, design the connecting arm and testing using sea water. The results showed the design of microcontroller-based solar reflector device for desalination equipment with dimensions of 60 cm long, 30 cm wide, and 55 cm high with drive system using Arduino UNO and driving motor using 25 kg DS3225 servo motor and with three reflector opening angles of 30⁰, 45⁰ and 60⁰ which move automatically every 2 hour and the production of fresh water produced in the 6 hour desalination process is 940 ml.
Studi Eksperimen Rumah Pengering Umbi Porang Sistem Hibrid (Energi Surya–Biomassa) dengan Variasi Tebal Irisan Chip Verdy Ariyanto Koehuan; Abner Paulus Bai’oef; Matheus M. Dwinanto
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.v9i02.9364

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh ketebalan chips umbi porang terhadap distribusi temperatur dan kelembaban udara dalam rumah pengering solar dryer sistem hibrid (energi surya-biomassa) terhadap laju pengeringan umbi porang. Metode penelitian adalah metode eksperimen pada rumah pengering menggunakan plastik ultra violet untuk menyerap panas radiasi dari sinar matahari dan energi termal dari tungku pembakaran biomassa kemudian dialirkan ke dalam rumah pengering melalui alat penukar panas. Hasil penelitian menunjukkan temperatur rata-rata dalam rumah pengering dengan masing-masing ketebalan chip umbi porang 3 mm, 4 mm, dan 5 mm, yaitu 47,030C, 48,740C dan 49,730C. Kadar air akhir chips umbi porang setelah pengeringan adalah 11,74%bb dengan laju pengeringan tertinggi sebesar 0,330 kg/jam dan lama pengeringan 5 jam pada ketebalan 3 mm. Efisiensi pengeringan, dan efisiensi rumah pengering masing-masing diperoleh pada ketebalan chip 3 mm, yakni sebesar 17,86 % dan 6,06 %.
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.

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