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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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Karakteristik Pembakaran Premixed Campuran Bioetanol Dan Premium (Gasoline) Riwu, Defmit B.N.; Tobe, Adi Y.; Adoe, Dominggus G. H.; Pah, Jack C.A.; Baria, Metrisno
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v9i01.8061

Abstract

Bioethanol is one of the renewable energies that can be used as fuel. Ethanol produced from palm sap can be used to mix fuel oil (BBM) into gasohol (energy mixed) which marks green fuels era begin. This research was conducted by burning a mixture of Bioethanol (105 ml, 120 ml, 135 ml, 143 ml) and Premium (45 ml, 30 ml, 15 ml, 7 ml), to determine the effect of adding Premium into bioethanol on temperature and flame color. The combustion process is carried out by premixed, in which a mixture of bioethanol and premium is heated to produce steam. This steam will be given a spark to produce combustion of the mixture. After the steam burns and produces a fire, then the air flow rate is regulated until the fire is blow-off. The results of the study indicate that, if the composition of bioethanol in the fuel is increasing, the flame looks bluer and the equivalence ratio value becomes smaller. In addition, the temperature reached at point 1 is higher than point 2. This indicates that point 1 is the final combustion zone, which is where the fuel has been burned completely
Temperatur, Warna Nyala Api, dan Tinggi Api pada Pembakaran Premixed Bioetanol dari Lontar (Borassus Flabellifer) Tobe, Adi Y.; Riwu, Defmit B.N.; Pah, Jack C.A.; Adoe, Dominggus G. H.; Baitanu, Rivanto
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v9i01.8062

Abstract

Bioethanol is a renewable energy that can be used as an alternative fuel. Bioethanol is alcohol produced from plants by using microorganisms through a fermentation process. This study aims to determine and analyze the combustion characteristics of premixed bioethanol from Lontar (Borassus Flabellifer), including: temperature, flame height and flame color. The research method uses a variety of air to be inserted, starting from 0 ml/min air flow to blow off in multiples of 50 ml/min. From the results of research that has been done, it shows that in premixed combustion the more air volume is given, the more blue the color of the flame will be, the temperature of the fire will increase and the height of the fire will be lower
Rancang Bangun Alat Pirolisis Reaktor Tabung Bertingkat untuk Daur Ulang Sampah Plastik Polypropylene (PP) dengan Menggunakan Metode VDI 2221 Adoe, Dominggus G. H.; Riwu, Defmit B.N.; Husein, Fuaddin B.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v9i01.8063

Abstract

The benefits of this research are to produce fuel oil products from Polypropylene (PP) plastic waste as an alternative energy source by utilizing pyrolysis technology and increasing the economic value of unused plastic waste and as a reference for overcoming environmental pollution caused by plastic waste. The final result of this research is a detailed drawing of the tool, the design of the tool, and the results of the testing process on the tool in the form of data on the quantity of oil in each test carried out. With the VDI 2221 design method, a multilevel tube reactor pyrolysis device can be made for recycling polypropylene (PP) plastic waste with the best variant selection technique. The application of the method in this study was successfully proven by choosing concept 4 as the best concept and the concept could be made in real terms. Furthermore, the tool after testing is proven to be able to be used to produce products, as evidenced by the results of product testing in the form of oil, residue and gases
Analisis Pengaruh Variasi Massa Material Arang Terhadap Proses Desalinasi Air Laut Tenaga Surya Ojan, Alfond Fasselis; Tarigan, Ben V.; Adoe, Dominggus G. H.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 01 (2022): April 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v9i01.8064

Abstract

Desalination is the process of distilling seawater using a heat source from solar energy to obtain fresh water. Therefore, one of the methods used to increase the results of the seawater desalination process is to make a tool using solar energy and charcoal material. This research was conducted to determine the effect of using charcoal material on the seawater desalination process. The use of charcoal material is expected to increase the absorption of heat energy and accelerate the evaporation process of seawater. In this study, the highest efficiency was obtained in basin I with a mass of 500 grams of charcoal, namely 5.393% with 70 ml of water produced, followed by basin IV without using charcoal material with an efficiency of 6.116% with fresh water produced of 60 ml, followed by basin IV. II with a mass of 400 grams of charcoal obtained an efficiency of 1.585% with 59 ml of water produced. And in basin III the efficiency and fresh water produced is less, namely 0.004% and the water produced is 41 ml
Implementasi Konsep Ergonomi pada Penggunaan Alat Tenun Tradisional Rumah Tenun Kampung Sabu Selan, Rima N.; Tualaka, Theodora M. C.; Manu, Ariency Kale Ada
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/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 muslimin, mukhlis; Seng, Ahamad; Aditiya, Raden; Hartono, Rudi
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/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 Siagian, Saut Ronny Tuah; Jafri, Muhamad; Tarigan, Ben V.; Riwu, Defmit B. N.; Adoe, Dominggus G. H.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/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 Adoe, Dominggus G. H.; Jasron, Jahirwan Ut; Nahak, Jufrianus Aven; Riwu, Defmit B.N.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/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 Sanusi, Arifin; Jasron, Jahirwan Ut; Tamonob, Kristoforus
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/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 bunganaen, wenseslaus; Toai, Yopi; Mangesa, Daud P.
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 9 No 02 (2022): Oktober 2022
Publisher : Universitas Nusa Cendana

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

Page 13 of 22 | Total Record : 216

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