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All Journal Rotasi Rekayasa Mesin LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Turbo : Jurnal Program Studi Teknik Mesin JMM (Jurnal Masyarakat Mandiri) Jurnal Fisika : Fisika Sains dan Aplikasinya ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Teknologi Jurnal Ilmiah Fakultas Sains dan Teknik Universitas Nusa Cendana Jurnal Pengabdian Kepada Masyarakat Undana (Abdimas Undana)
Defmit B.N. Riwu
Program Studi Teknik Mesin, Fakultas Sains Dan Teknik Universitas Nusa Cendana
Aerospace Engineering Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Kecepatan Pembakaran Premixed Campuran Minyak Jarak - Liquefied Petroleum Gas (LPG) pada Circular Tube Burner Riwu, Defmit B.N.; Wardana, I.N.G.; Yuliati, Lilis
Jurnal Rekayasa Mesin Vol 7, No 2 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (540.042 KB) | DOI: 10.21776/ub.jrm.2016.007.02.1

Abstract

This study was conducted to determine the characteristics of premixed combustion of a mixture of castor oil - LPG on a circular tube burner. Percentage of LPG fuel in a mixture of jatropha curcas oil - LPG varied as much as 10%, 20%, 30%, and 40% of the mass flow jatropha curcas oil vapor. Considering the flame of fire there are two angles formed which describe burning velocity. Also there are formed two cones of fire where the bright blue inside cone is a premixed flame, while the outer blue white cone is flame a diffusion flame. An increase in the percentage of LPG makes the value of top and bottom angle increase. So that the burning velocity on the upper angle decrease whilst on bottom angle increase.
Pengaruh Penambahan LPG (Liquified Petroleum Gas) pada Proses Pembakaran Premixed Uap Minyak Jarak Pagar (Jatropha Curcas L.) terhadap Warna dan Temperatur Api Defmit B. N. Riwu
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 3 No 2 (2016): Oktober 2016
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (566.212 KB)

Abstract

This study was conducted to determine the effect of the addition of Liquefied Petroleum Gas (LPG) to the premixed combustion characteristics of Jatropha oil vapor. Combustion characteristics studied were the color of fire and flame temperature. In this study, using a variation of the composition of LPG as much as 0%, 10%, 20%, 30%, and 40% of the total mass flow of steam Jatropha oil, while the air discharge varied from 0 ml/min to blow off with multiples of 20 ml/min. In oil discharge distance is kept constant yawning as much as 0046 ml/min, from the results, there is a section on the burning diffusion flame in blue and yellow. The yellow color indicates the burning fuel diffusion and the formation of soot, and in the middle of the blue flame. Increasing the flow of air at constant fuel flow, flame yellow part is getting a bit and part blue flame sees more. In particular, equivalence ratio looked two parts of the cone of fire. The cone fire inside bright blue is a premixed flame, while the outer cone of blue flame thins a diffusion flame. If the percentage of LPG increased, fire temperature will also increase. The lowest temperature to highest temperature, respectively are in the middle of the fire, the edge of the fire, and the peak of the fire.
Pengaruh Penambahan Senyawa Acetone Pada Bahan Bakar Bensin Terhadap Emisi Gas Buang Defmit B. N. Riwu
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 4 No 1 (2017): April 2017
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.769 KB)

Abstract

Penelitian ini dilakukan untuk mengetahui pengaruh penambahan senyawa Acetone pada bahan bakar bensin terhadap emisi gas buang motor 1 silinder 4 langkah dengan volume ruang bakar 100 cc. Pengujian dilakukan dengan menambahkan Acetone sebanyak 1 ml, 2 ml dan 3 ml kedalam bahan bakar bensin sebanyak 1000 ml. Dari hasil pengujian, didapati bahwa dengan penambahan tiap 1 ml senyawa Acetonepada 1000 ml bensin, maka besar prosentase kandungan gas CO yang terbentuk semakin berkurangatau mengalami penurunan. Selain itu kadar HC yang terukur juga berkurang atau dengan kata lain proses pembakaran menjadi lebih baik. Hidrokarbon (HC) yang terukur dalam emisi gas buang menunjukan senyawa bahan bakar yang tidak habis terbakar dalam proses pembakaran.
Rancang Bangun Mesin Pemeras Santan Kelapa Dengan Mekanisme Tekan Horizontal Daud P. Mangesa; Defmit B.N. Riwu; Muhammad Julfikar
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.v9i02.3343

Abstract

Mesin pemeras santan kelapa merupakan sebuah mesin yang digunakan untuk memeras santan kelapa yang terdapat pada parutan kelapa. Mesin ini tersusun atas motor listrik sebagai penggerak yang dilengkapi dengan dimmer AC yang bertujuan untuk mengurangi kecepatan putaran dari motor. Kemudian putaran tersebut ditransmisikan oleh bearing, pulley, belt, yang kemudian akan menggerakkan poros ulir (screw press). Berdasarkan perhitungan dalam perencanaan, mesin pemeras santan kelapa ini didapatkan diameter poros yang digunakan adalah 24,5 mm, dan diameter ulir pada poros (secrew press) adalah 70 mm dengan daya motor listrik 1 HP. Berdasarkan penelitian, diperlukan putaran rendah untuk memeras santan kelapa hal ini dimaksudkan agar perasan tersebut lebih optimal. Pemerasan santan kelapa dilakukan cukup 1 kali karena kandungan santan dalam parutan kelapa sudah terperas seluruhnnya. Dengan sistem ini dapat mempercepat proses produksi serta lebih efisien dari segi ekonomi
Analisis Tinggi dan Temperatur Api pada Pembakaran Premixed Campuran Minyak Solar Murni dan Fame (Fatty Acid Methyl Ester) Defmit B.N. Riwu; Jack C. A. Pah; Adi Y. Tobe; Wagimin Wagimin
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 7 No 01 (2020): April 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.v7i01.3378

Abstract

Penelitian ini dilakukan dengan membakar campuran minyak solar murni dan minyak FAME (Fatty Acid Methyl Ester) dengan prosentase campuran solar murni (80%, 90%, dan 95%) dan minyak FAME (20%, 10%, dan 5%) secara premixed. Berdasarkan hasil penelitian didapatkan bahwa semakin besar prosentase minyak FAME yang ditambahkan maka tinggi api dan temperatur api menurun, meski penurunannya tidak terlalu signifikan. Pada prosentase minyak solar murni dan FAME (Solar 95% - FAME 5%) Pada debit udara 350 ml/min dengan equivalence ratio 1.571 pada prosentase minyak solar 95% - FAME 5%, 1.535 pada prosentase minyak solar 90% - FAME 10% dan 1.462 pada prosentase minyak solar 80% - FAME 20%. Hubungan prosentase minyak solar dan FAME terhadap temperatur pada dua titik pengambilan temperatur yaitu bagian ujung api dan bagian tengah dekat ujung burner. Terlihat bahwa semakin besar prosentase minyak FAME maka semakin kecil temperatur apinya.
Karakteristik Pembakaran Difusi Campuran Solar Murni dengan Minyak Kelapa Jack C.A. Pah; Defmit B.N. Riwu; Adi Y. Tobe; Suprianto Siagian
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 7 No 01 (2020): April 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.v7i01.3379

Abstract

This research was conducted to determine the effect of adding coconut oil to pure diesel oil on the characteristics of diesel oil steam diffusion combustion. The characteristics observed are flame height and fire temperature. The combustion process is carried out on a circular tube burner. The steam mass flow of fuel in this study is 0.0895 grams / second. From the results of the study the biggest results were obtained in the mixture of 90% diesel oil with 10% coconut oil, fire height of 94.51 mm and a temperature of 967˚C and the lowest yield was found in a mixture of 70% diesel oil and 30% coconut oil, namely temperature amounting to 796˚C and fire height of 68.85 mm. From this, it can be concluded that the greater the percentage of diesel oil added to the combustion process, the higher and the flame temperature will increase. This is due to the characteristics of different fuels, where diesel oil has a lower viscosity than coconut oil and has a heating value greater than coconut oil.
Pengaruh Penambahan Solar Murni terhadap Karakteristik Pembakaran Difusi Uap Minyak Kelapa Adi Tobe; Defmit B.N. Riwu; Jack Pah; Kyven G. Hoke Liba
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

Abstract

Minyak kelapa merupakan minyak nabati yang ramah lingkungan dan sangat mudah didapatkan di Indonesia, selain itu minyak kelapa dapat digunakan sebagai energi alternatif. Penelitian ini dilakukan untuk mengetahui pengaruh penambahan solar murni terhadap karakteristik pembakaran difusi uap minyak kelapa. Metode yang digunakan dalam penelitian ini adalah metode eksperimen. Dari penelitian ini didapatkan bahwa pada campuran 90% minyak kelapa + 10% solar murni tinggi api hasil pembakaran 6,83 mm dengan suhu 328 ° C, sedangkan pada campuran minyak kelapa 80% + solar murni 20%, hasil pembakaran 12,86 mm dengan suhu 389 ° C dan pada variasi campuran minyak kelapa 70% + solar murni 30% menghasilkan hasil pembakaran 23,15 mm dengan suhu 423 ° C. Perbedaan ketinggian nyala api dan suhu disebabkan oleh perbedaan viskositas dan nilai kalor dari kedua oli tersebut. Oleh karena itu dari penelitian ini dapat disimpulkan bahwa setiap penambahan solar murni suhu dan ketinggian api akan meningkat
Rancang Bangun Mesin Pemarut Batang Putak Vinsen Yuminto Bifel; Defmit B.N. Riwu; Jack C.A. Pah
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 8 No 01 (2021): April 2021
Publisher : Jurusan Teknik Mesin, Fakultas Sains dan Teknik, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Putak is the name of a local feed on the island of Timor, East Nusa Tenggara which is obtained from the trunk of the gewang tree (Coypha gebanga). Most of the putak processing by the people of Timor Island is very low and also limited so that putak productivity is very low because people still do it traditionally and only use it as food. Therefore, this study aims to design a putak grater for animal feed. The VDI 2221 method is a design method that uses a systematic approach to design for engineering systems and engineering products. The effective capacity of the tool is obtained by grating / repeating 3 times, then the average effective capacity of the tool is calculated. In testing the putak sticks used to produce a grated mass volume of 3,5 kg, and a tool capacity of 70 kg/hour. The results showed that the effective capacity of the putak grating machine was 70 kg/hour.
Waktu Gesek Terhadap Kekuatan Tarik Sambungan AA6061-Baja Karbon Pada Pengelasan Gesek Continuous Drive Jack C.A. Pah; Defmit B.N. Riwu; Dominggus Adoe; Adi Y. Tobe
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.v8i02.5940

Abstract

The objective of this research was to get the effect of friction time on the tensile strength of the joining of aluminum alloy AA6061 and carbon steel, with continuous drive friction welding process. Variations of friction time of this research were 5 seconds, 7 seconds, 9 seconds, and 11 seconds. Other friction welding variables were friction pressure 24 MPa, forging pressure 79 MPa, forging time 60 seconds, and friction rotation speed 1600 rpm. The independent variable was the ultimate tensile strength of the welded joint. The results showed that the relationship between friction time and ultimate tensile strength is not linear, with the increase in friction time. The increasing of friction time, caused the ultimate tensile strength increase to a maximum value and then the ultimate tensile strength of the joint will decrease sharply. The greatest ultimate tensile strength is obtained at a friction time 9 seconds, with ultimate tensile strength 111.89 MPa
Analisis Pengaruh Variasi Tekanan Dan Dimensi Briket Sekam Padi Terhadap Temperatur Dan Lama Nyala Api Melvani E. D. Tana; Defmit B.N. Riwu; Adi Y. Tobe
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.v8i02.5943

Abstract

This research was conducted to determine the effect of variations in pressure and dimensions of rice husk briquettes on the temperature and duration of the flame. The mashed husk charcoal is mixed with 50 ml of water, 160 grams of starch and 450 grams of rice husk charcoal, stirred until evenly distributed. The process of molding charcoal briquettes that have been mixed and then printed, uses molds with diameters of 1 in, 1.5 in and 2 in, with different briquette pressure variations, pressure variations using sizes 0.1 MPa, 0.2 MPa, 0, 3 MPa, 0.4 MPa. The briquettes are then dried in the sun for three days to dry. From the research, it was found that the variation of pressing pressure affects the characteristics of the flame and the dimensions of the burning of rice husk briquettes. The highest temperature was recorded at 749 0C at 1.5 In briquette size and the pressing pressure was 0.2 MPa. At this size, the longest flame is 18 minutes
Co-Authors Adi Tobe Adi Y. Tobe Adi Y. Tobe Adi Y. Tobe Adi Yermia Tobe Ben V. Tarigan Ben V. Tarigan Ben Vasco Tarigan Daud P. Mangesa Daud P. Mangesa Daud P. Mangesa Dominggus Adoe, Dominggus Eflinda Milo Erich U. K. Maliwemu Fuaddin B. Husein Gusnawati Gusnawati I.N.G. Wardana Jack C. A. Pah Jack C.A Pah Jack C.A. Pah Jack C.A. Pah Jack Carol Adolf Pah Jack Carol Adolf Pah Jack Pah Jacob Abolladaka Jahirwan Ut Jasron Jufrianus Aven Nahak Kyven G. Hoke Liba Lilis Yuliati Margaretha Kewa Unarajan Marten E. Manane Matheos Marc Tuka Penu Matheus M. Dwinanto Melvani E. D. Tana Metrisno Baria Muhamad Jafri Muhammad Julfikar Piter Talo Priyono Priyono Reinaldy Weo Rima Nindia Selan Rivanto Baitanu Robin Diyener Takain Saut Ronny Tuah Siagian Seprianus Rudolf Membubu Simplisius Fridolin Akoit Suprianto Siagian Verdy A Koehuan Vinsen Yuminto Bifel Wagimin Wagimin Wenseslaus Bunganaen Yoffial D. Banani Yohanes V. Gere