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Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia
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INDONESIA
Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
Published by Universitas Mataram
ISSN : 2088088X     EISSN : 25021729     DOI : https://doi.org/10.29303/dtm.v14i1
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Mechanical Engineering Physics
The Dinamika Teknik Mesin is a peer-reviewed academic journal which publishes originally research papers or simulation/computational articles in all aspect of Mechanical Engineering such as energy conversion, materials, design and production/ manufacturing. The Dinamika Teknik Mesin publishes in two issues per volume annually appearing in June and December. Due to administrative constraints, then starting in January 2018, the Dinamika Teknik Mesin publishes the volume and issue in January and July. However, starting in 2020, the Dinamika Teknik Mesin publishes issues in April and October due to the new administration.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 452 Documents
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DESAIN TUNGKU BRIKET BIOMASSA SYSTEM KONTINYU SEBAGAI TEKNOLOGI PEMANFAATAN ENERGI ALTERNATIF PENGGANTI BAHAN BAKAR TERPAKAI PADA OVEN TEMBAKAU DI MASYARAKAT PEDESAAN Wijana, Made; Nurchayati, Nurchayati
Dinamika Teknik Mesin Vol 3, No 1 (2013): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Semakin menipisnya cadangan minyak dunia yang menyebabkan harga bahan bakar minyak (BBM) terus melambung. Tungku spiral berbahan bakar minyak tanah, merupakan komponen utama pada oven (omprongan) tembakau yang ada di NTB, yang mana potensi tembakau Virginia sebanyak 45.534 ton dan memerlukan minyak tanah 45 juta liter. Tembakau yang banyak tersebut  terancam tidak dapat dikeringkan akibat mahal dan langkanya minyak tanah sebagai bahan bakar utama. Sementara energy alternative pengganti berupa bongkahan batu bara dan kayu bakar tidak memberikan solusi yang baik.  Untuk  itu dalam penelitian ini didesain tungku yang kemudahan pengoperasiannya menyerupai kombinasi tungku minyak tanah dan tungku bongkahan batu bara dengan memanfaatkan kelebihan dan memperbaiki kelemahan-kelemahannya.  Dengan tungku yang mudah dioperasikan sebagai alat pemanfaat energi alternative dan terbarukan, maka masyarakat akan tertarik untuk menggunakannya, ini akan berdampak pada menurunnya biaya pengovenan tembakau. Metode yang digunakan dalam penelitian ini adalah eksperimen langsung, untuk mengetahui kinerja tungku spiral dilakukan beberapa pengujian. Untuk mendapatkan kesepadanan kemampuan pemanasan antara tungku spiral berbahan bakar minyak tanah dengan tungku desain baru berbahan bakar briket, dilakukan pengujian nilai kalor dan perhitungan jumlah alur briket yang diperlukan, selanjutnya dilakukan pengujian boilling time pada masing-masing tungku.  Dan untuk mengetahui peningkatan waktu operasional tungku baru dibanding bahan bakar alternatif lain, dapat dilakukan pengujian lama nyala dalam satu kali pengisian tungku briket.  Serangkain pengujian ini dilakukan untuk mengetahui apakah  tungku desain baru ini layak  digunakan pada omprongan tembakau.Dari hasil pengujian nilai kalor diperoleh bahwa nilai kalor tertinggi adalah minyak tanah dengan nilai kalor, 9.828,2816 Kkal/kl, dan yang terendah adalah briket biomassa dengan nilai kalor 4.996,5028 Kkal/kg. Pada tungku spiral diperoleh kecedrungan bahwa semakin besar stelan, maka n boilling time semakin kecil (cepat) dan kebutuhan bahan bakar yang semakin besar. Waktu yang dibutuhkan untuk mendidihkan 1 liter air ( boiling time) yang paling kecil (cepat) adalah pada stelan ke 4 yaitu 178,67 detik, pada posisi ini, kebutuhan bahan bakarnya terbesar yaitu  103,33 ml. dari pengujian  tungku briket desain baru yang menggunakan dua bahan bakar alternative,  boilling time kedua bahan bakar alternative (briket) tersebut masih lebih besar dibandingkan dengan tungku spiral stelan ke 4. yaitu  masing-masing 390.67 detik untuk briket biomassa dan 255.33 detik untuk briket batubara. Sedangkan dilihat dari boiling time tungku spiral stelan ke 2 yang memiliki nilai 437.33, maka kedua bahan bakar alternative yang menggunakan tungku desain baru, memiliki boiling time yang lebih kecil (cepat) dan dari pengujian lama operasional tungku berbahan bakar briket biomassa, dibandingkan dengan bongkahan batubara dan kayu bakar, diperoleh peningkatan lama operasional sebanyak tiga kali lipat. Bongkahan batubara dan kayu bakar, dalam satu kali pengisian dapat beroperasi selama maksimal 2 jam, sedangkan tungku desain baru berbahan bakar biomassa, dapat beroperasi 6 jam dalam satu kali pengisian. Sedangkan Mekanisme kerja penekan briket, alur briket dan penahan ruang pembakaran dapat berjalan sesuai fungsinya sehingga, kontinyuitas tungku dalam 1 kali pengisian dapat berjalan dan beroperasi dengan stabil selama 6 jam.  Dari kinerja tersebut, maka tungku desain baru layak menggantikan tungku spiral pada omprongan tembakau .
Variasi persen berat tempurung kelapa terhadap konduktivitas termal komposit silicone rubber Mirmanto, M.; Sugiman, S.; Ramadhani, M.D.; Fathurrahman, F.
Dinamika Teknik Mesin Vol 11, No 2 (2021): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v11i2.450

Abstract

Experiments to know themal conductivities of silicone rubber composite were conducted. The sillicon rubber was mixed with coconut shells charcoal powder with weight variations. The weight presentage variations were 0, 10, 20 and 30%. Increasing the weight persentage was expected to increase the thermal conductivity of the composite. The speciment size was 50 mm x 50 mm x 5 mm. The speciments were tested according to the conduction heat transfer mode. To make sure that the temperatures were steady, the experiments were performed for about 6 hours. The results indicated that increasing the weight presentage raised the composite thermalconductivities. At 0% of wight, the composite had a thermalconductivity of 0.157 W/m°C, at 10%, 20% and 30% of weight compositions; the composite had thermal conductivities of 0.461 W/m°C, 0.58 W/m°C, and 0.73 W/m°C respectively.
Simulasi pemasangan sebuah model kerugian minor perubahan penampang di konektor loop mesin termoakustik Nurpatria, N.; Mirmanto, M.; Joniarta, I.W.; Padang, Y.A.; Susana, I.G.B.
Dinamika Teknik Mesin Vol 13, No 1 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i1.626

Abstract

A custom-designed thermoacoustic engine model has been created with the open source Delta EC simulation software. The specific design of the engine lies in the part of the heat exchanger, which allows it to receive heat from the hot gas stream resulting from the combustion of low grade biomass directly. The engine model can be coupled with a loudspeaker model that functions as a liner alternator, resulting in a simple power generator engine model. In this study, further simulations were carried out to increase the total efficiency of converting heat energy into electricity from the previous model. After that a model of minor loss of cross-sectional change was also added to the model. In a certain set of engine model parameter values without minor losses, the efficiency of converting heat energy to acoustic energy is 12.76%, equivalent to the amplification of acoustic energy by a regenerator of 33.26 W. The total efficiency of the engine model in converting heat energy into electrical energy is 10.53%. After the addition of a sub-program of minor losses due to the effect of one conical segment, there was an acoustic energy loss of 0.11 W. So that the efficiency of converting heat energy to acoustic energy was reduced by 0.01% to 12.75%. As a result, relatively small change occur in the total efficiency of the engine model.
PENGARUH BEBAN TEKAN TERHADAP KEMAMPUAN EKSTRAKSI MASSA CAIR SLURRY OLEH “ALAT PEMISAH FASES-URINE SAPI” YANG DIOPERASIKAN SECARA MANUAL Nurpatria, N.; Padang, Yesung Allo
Dinamika Teknik Mesin Vol 1, No 1 (2011): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Cow manure can be used as a source of energy and as a solid or liquid fertilizer. An adult cow can produce fases (solid manure) to 23 kg/day and urine (liquid manure) 9 kg/day. Three or four cow is capable to fullfill the dayly needs of cooking fuel for one rural household. Cow manure slurry can also be convert as fertilizer, that is liquid fertilizer which is derived from urine and solid fertilizer originating from the solids. Solid and liquid from cow manure is usually mixed, therefore to make the liquid and solid fertilizer, the liquid and solid masses need to be separated first. Recent separators of fases and urine are are electrical energy driven, so that those kind of device could not be used in the rural areas where the electric grid supply were not available. So that a model of a faces-urine separator of cow manure slurry is utilize which was constructed for manual pressing force. Moreover, through this research It have had created a manual fases-urine separator which only requires one operator. The separator consists of main parts including; lever press, chamber press, fases-urine separation mechanism, the mechanism of loading-unloading, and ajustment mechanism for pressing pressure. This design is capable of performing the separation in a wide range of pressing force and it only requires one operator. Results Show That the model is capable to separate liquid from the slurry as much as 13.9% at a pressing force of 14 kg the which is applied for 18 seconds.
Drying time and mixture composition effect on biomass of pine cone and palm shell Radyantho, K.D.; Rusdan, A.; Suanggana, D.; Haryono, H.D.; Kan, E.F.
Dinamika Teknik Mesin Vol 15, No 1 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i1.1043

Abstract

According to the International Energy Agency (IEA), global energy demand is expected to rise by 45% by 2030, with around 80% still met by fossil fuels. This necessitates urgent development of alternative energy sources, such as biomass, which is renewable and can help reduce organic waste. This study examines the impact of varying drying times and mixture compositions of palm shells and pine fruits on the characteristics of briquettes. These materials were chosen due to their availability and potential to mitigate environmental impacts.The research investigates the moisture content, calorific value, and ash content of the briquettes. Results show all briquette compositions meet the Indonesian National Standard (SNI) No. 1683:2021 for moisture content, though only WP3 fails to meet standards. Ash content for all variations exceeded the SNI threshold (≥ 10%). However, all met the calorific value standard, with WP3 achieving the highest value (6643.18 cal/g). ANOVA analysis indicates both mixture composition and drying time significantly affect moisture and ash content, but only drying time significantly impacts calorific value
KARAKTERSTIK SERAPAN SUARA KOMPOSIT POLYESTER BERPENGUAT SERAT TAPIS KELAPA Astika, I Made; Dwijana, I Gusti Komang
Dinamika Teknik Mesin Vol 6, No 1 (2016): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v6i1.19

Abstract

The purpose of this study is to investigate of sound absorption of coconut filter fiber composites. The research material made with coconut filter fiber as reinforcement and matrix resin unsaturated polyester (UPRs) type Yukalac BQTN 157 with 1% hardener types MEKPO (Methyl Ethyl Ketone Peroxide) and fiber treatment by  0,5% KMnO4. Production methods is poltrusion and the variations of fiber volume fraction are 20, 25 and 30% and fiber length are 5, 10 and 15 mm. Testing of sound absorption frequency are 250, 500, 1000, 2000 and 4000 Hz. The results of research show that  the highest value of sound absorption coefficient is on  the composites with composition of 10 mm fiber length and 30% fiber volume fraction, that is 0.550828. The values are included in the class “Sound Absorption Coefficient Class D (Extremely absorbing)” with the range 0.40 – 0.60 based on ISO standard 11654:1997.
Variasi sudut pemasangan tabung kompresor terhadap unjuk kerja pompa hidram Sutanto, R.; Wardani, K.; Alit, I.B.; Wirawan, M.
Dinamika Teknik Mesin Vol 8, No 2 (2018): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v8i2.234

Abstract

Water is one of the factors which very important and necessary in the life of living creatures. Therefore,  water  must  be  available  whenever  and  wherever  in  the  quantity,  timing,  and sufficient quality. Hydraulic Ram Pump (Hydram) is a pump which does not require external energy as the power source. The purposes of this research are understanding the influence of mounting tube compressor with tilt angle from the water weight-lift of output pipe .This  research  uses  hydrant  pump  by  the  specification of  tube  compressor where  its’ diameter 3 inches and a height of 60 cm. The falling angle of pump is 35°. The falling-height is 2 meter with 4 variations of weight-lift 4, 4½, and 5 meters.The method of analysis is conducted by analyzing data obtained during the experiment, where the   results in the form of quantitative data which is presented in type of   tables and displayed in graphical form. The results of the research shows that  the best output debit on mounting tube compressor variation 90° that is 0.035 l/s  with 4 meters water weight-lift, while the lowest output debit on mounting tube compressor variation that is 0.011 l/s 5 meters water weight-lift. The best efficiency is 27.3 % in the mounting tube compressor variation 90°  with 4 meters of water weight-lift, while the lowest efficiency is 6.5 % in the mounting tube compressor variation 90° with 5 meters of water weight-lift.
APLIKASI BREAK EVEN POINT PADA SISTEM OPERASIONAL KAPAL MOTOR PENYEBERANGAN RODITHA PT. ASDP INDONESIA FERRY (PERSERO) CABANG LEMBAR Wijana, Made; Triadi, A.A. ALit; Febriandi, Firza
Dinamika Teknik Mesin Vol 4, No 2 (2014): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v4i2.57

Abstract

This study is intended to analyze the feasibility operation KMP Roditha which owned by PT. ASDP Indonesia Ferry (Limited). Location of research in the trajectory Sheet - Padang Bai, was used the Break Even Point. Collecting a range of cost of KMP Rodita, therefore was known the operating costs, maintenance costs and income from the sale of tickets while one year. Stepsare used in this research is the analysis of quantitative data, where i would collect the data required in relation to the matter to be investigated, so that research results can be more reliable and credible. The results of this study indicate that KMP Roditha income in 2010 was Rp. 12,007,178,916, of a total of 504 trips. Break Even Point in 2010 occurred in the 5th month on 213 trips, so that KMP Roditha feasible to operate.
Pengaruh temperatur terhadap struktur mikro dan sifat mekanik dalam proses fussion brazing Ni-Hard 4 dengan S45C menggunakan CuZn 35 sebagai logam pengisi. Siswanto, Ari; Purwadi, W.
Dinamika Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v10i1.309

Abstract

This research was conducted on white cast iron (Ni-Hard 4) and medium carbon steel (S45C) cast iron materials using a thin brass plate (CuZn 35) 0.3 mm as filler metal by heating at temperatures of 850 to 1050 0C for 120 minutes with a pressure of 2 Mpa in the muffle furnace. The effect of temperature on the microstructure was observed using an optical microscope and scanning electron microscopy equipped with energy dispersive X-ray system (EDS) to determine the chemical composition that occurred between the three meterial layers. The thickness of the interface layer increases with increasing holding temperature. The highest shear strength (79.86 Mpa) was obtained at a temperature of 950 0C.
PERANCANGAN PIPA PESAT, DAN DAYA KELUARAN PEMBANGKIT LISTRIK TENAGA AIR KOKOK PUTIH DESA BILOK PETUNG KECAMATAN SEMBALUN KABUPATEN LOMBOK TIMUR Mahendra, Berlian; Mara, Made; Padang, Yesung Allo
Dinamika Teknik Mesin Vol 3, No 2 (2013): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Inconsequent of decreasing fossil energy, It is necessary to developing an alternative energy source. One of the alternative energy that can be developing in Indonesia especially at Bilok Petung village, district of Sembalun, East Lombok Regency is water power station.This design is to review power station plan in Koko Putih that will have finished. Inputs in this design are flow rate and head which are available in Koko Putih. From this design, it is obtained that the inside penstock diameter  987 mm and the thickness  penstock in head 286.72 m is 15.15 mm, penstock material is carbon steel with specification ASTM A252 Grade 2. Head effective of Koko Putih water power plan is 249.603 m. Output power of turbine is 3.9 MW and output power of generator is 3,6 MW.

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