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Articles 173 Documents
Pengaruh variasi campuran bahan bakar tongkol jagung dan tempurung kelapa terhadap unjuk kerja tungku biomassa Joniarta, I.W.; Wijana, M.; Triadi, A.A. Alit; Iswara, I.B.K.T.H.; Adhi, I.G.A.K.C.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 8, No 2 (2018): Dinamika Teknik Mesin, 10 articles
Publisher : Universitas Mataram

Show Abstract | Original Source | Check in Google Scholar | Full PDF (317.203 KB) | DOI: 10.29303/dtm.v8i2.152

Abstract

Agricultural waste such as corn cobs and coconut shell can be used as alternative energy. Biomass as an alternative energy can be used as a fuel in the furnace. Corncob has low calorific value and density, so it is necessary to examine the combination’s effect of corn cobs and coconut shell toward the performances of biomass furnace.The gasification furnace was the development of a furnace design on previous research. Diameter of combustion chamber is 25 cm, diameter of free air duct and secondary air duct is 2 cm, and primary air duct is 1 cm. Combined corncob and coconut shell in sequence are 100%: 0%, 80%: 20%, 60%: 40%, 40%: 60%, 20%: 80%, 0%: 100%. Investigated parameters showing the furnace performance were boiling time, FCR, power input, power output, power loss and efficiency are boiling time, FCR, operating time, power input, power output, power loss and efficiency. Test of operating time were conducted by burning fuel until burned out. Then boiling time test were conducted by heated 1 liters water from ambient temperature to boiling (between 95oC - 97oC) on a 24 cm diameter pan.The results showed that the largest operating time (1317.33 Seconds), smallest FCR (2.249 Kg/hour), smallest power loss (19.532 kW), and the highest efficiency (8.19%) obtained at 0% : 100% combination. The fastest boiling time (157 Seconds) and the largest power output (1.828 kW) was obtained at 40%: 60% combination. While the largest power input (29.286 kW) was obtained at 60%: 40%.
REDAMAN SUARA PADA KOMPOSIT SANDWICH POLYESTER BERPENGUAT SERAT SISAL DENGAN CORE STYROFOAM sinarep, S.; Catur, Agus Dwi; Hafidzul, M.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 4, No 1 (2014): Dinamika Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Penggunaan serat alam pada kulit komposit sandwich dalam  sekat bangunan perlu diteliti kemampuannya untuk menyerap energi suara pada beberapa frekuensi suara target.            Bahan penelitian ini adalah serat sisal anyam, resin polyester, styrofoam. Komposit dibuat dengan metode hand lay-up. Komposit  sandwich polyester tersusun dari dua skin dengan core ditengahnya. Fraksi volume serat komposit sandwich polyester sebagai skin adalah 30 %.  Core yang digunakan ada 2 macam variasi ketebalan yaitu 30 mm dan 40 mm. Spesimen dan prosedur pengujian koefisien redaman suara mengacu pada standar ASTM E1050.Hasil rata-rata redaman suara yang besar terdapat pada spesimen komposit sandwich dengan ketebalan core 30 mm dengan hasil yang fluktuatif pada kenaikan tingkat frekuensi pegujian.  Pada frekuensi rendah 250 Hz dengan nilai redaman 0,809 yang dilapisi kain beludru, frekuensi sedang 750 Hz dengan nilai redaman 0,819 yang dilapisi karpet, dan pada frekuensi tinggi 1500 Hz dengan nilai 0,725 yang dilapisi kain beludru.
ANALISA KELAYAKAN ETANOL KADAR RENDAH SEBAGAI BAHAN BAKAR PADA KOMPOR BERGRAVITASI Wardi Salim, Ahmad; Mara, Made; Padang, Yesung Allo
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 3, No 1 (2013): Dinamika Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Low grade alcohol  is energy that can be renewed. when compared to kerosene and LPG, bioethanol stove is non explossive, does not require a large pressure and easy to manufacture.This study to determine the effect of the height and length of  heating coil burner water heating time, preparation time and fuel consumption. The principle of low grade of ethanol stove is used the position of the fuel tank height and speed up the process of  evaporation. Variations used in this study is the length of the heating coil burner that is 55 cm, 75 cm, 95cm, and height is given by 1.5 m, 1.75 m, and 2 m.The results indicate that the use water heating fastest time obtained at 2 m height variation with of 95 cm burner heating coil of 790 seconds. At the time of preparation reduction obtained at the optimal height variation of 1.5 mand lenghth 95 cm of burner heating coils is 328 sekonds. The lowest fuel consumption obtained when using length variation burner heating coil 55 cm and a height of 1.5 m  at 0.132 ml/sec.
Aplikasi Rekayasa Nilai (Value Engineering) Pada Desain Tungku Briket Arang Biomassa Sistem Kontinyu Berpengapian Semi Otomatis Sebagai Upaya Mempermudah Pemanfaatan Energi Alternatif Mengganti Minyak Tanah Wijana, Made; Joniarta, I Wayan
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 2, No 2 (2012): Dinamika Teknik Mesin
Publisher : Universitas Mataram

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Abstract

The biomassa charcoal briquet is one of principal component of cooking in household scale which has some weakness in its operation, such as take a long time for beginning ignitation, flame energy is not stable, the putting out can not be done quickly, once filling up for once cooking. Impractical operational of briquet stove  caused people did not want to change the use of petroleum stove to the use  of biomass briquet stove. Hence, biomass charcoal briquet stove is modified in order to simplify its operation by increase fungsional aspect, technique aspect, and economical aspect.            The method used in this research is value engineering method in order to choose one alternative of modification of biomass charcoal briquet  stove and analyze with five phase of job planning that include (1) information phase, (2) creative phase, (3) analysis phase, (4) development phase, and (5) presentation phase.            At the analysis phase, it is made analysis to eight alternatives of modification and one initial design which is used as reference of performance evaluation. The evaluation result at development phase is the seventh alternative of modification has the highest value that is 1,358 with performance 425,10 and gives some advantages, those are cooking speed is increased (boilling water in seven minute per liter), operational simplicity is very increased that is once filling up for cooking repeatedly (continue system), cutting out of fire can be done quickly without taking apart of stove (semi automatic), pollution is decreased and stinging smell is not happen.            Biomass charcoal briquet stove has high economic value, because its operasional is almost the same as petroleum stove and its operational cost is a quarter of petroleum stove cost.  So, it is good to be developed and applied to society. 
Optimasi Connecting Rod Sepeda Motor Untuk Mereduksi Massa Dan Brake Specific Fuel Consumption (BSFC) Okariawan, IDK.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 1, No 2 (2011): Dinamika Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Many countries in the world at recent decade depends energy source from oil (petroleum). Oil is un-renewable energy and someday the quantity will be very low (oil crisis). Some of oil conservation needed to expand oil live, and now for Indonesia, reduce fuel consumption of automobile (particularly for motorcycle) is primary oil conservation effort. Mass reduction of automobile component is one of the way to reduce fuel consumption, from Engineering Design and Manufacture point of view so that these researches try to reduce mass of connecting rod in Motorcycle.       In this research mass reduction, that connecting rod was considering with safety design to material failure, which was quasi-static Factor of Safety (FOS). Increase of fuel efficiency effect calculated from Brake Specific Fuel Consumption (BSFC) criteria. Simulation method was a basis to find FOS and BSFC talked above.       As the result of this research, optimum connecting rod model was obtained, that has lighter mass than initial connecting rod, also enable to stand the allowable minimum FOS (4,6 for tensile load and 2,55 for compressive load). The optimum connecting rod model also enables to reduce BSFC about 6 %.
Optimasi topologi pada komponen penampan mesin printer 3dimensi dengan metode generative desain Utama, D.W.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 7, No 2 (2017): Dinamika Teknik Mesin, 8 articles
Publisher : Universitas Mataram

Show Abstract | Original Source | Check in Google Scholar | Full PDF (4588.498 KB) | DOI: 10.29303/dtm.v7i2.150

Abstract

The process of developing a product is currently demanded faster implementation, where the use of CAD can help speed up the process of product development. The commonly CAD software used is parametric method software, where the user can change the shape of the model by changing the parameters accordingly, after which, the model can be directly analyzed using finite element analysis method. If the design is needed to be changed, then the designer should change the parameters in  CAD module and then performed FEA analysis again. This process is often done repeatedly to produce a product model that meets the needs and criteria specified. Generative design method is a method that uses a series of design criteria and design limitations. In this paper the generative design method is a feature in CAD where topology optimization is applied in creating the design of the tray table. The tray table is the main component of the 3D printer that has design criteria such as static load of 17.912N and geometric boundaries. The generative design used to optimize the weight of the component is reshaped again according to the criteria and aesthetics of the form. The CAD model is retested with the FEA method to ensure safe design. The results show that the best optimazation is at 55% weight reduction with the von mises stress 2.12 MPa and the deflection about 0.129mm.
Turbin angin poros vertikal tipe Savonius bertingkat dengan variasi posisi sudut Alit, I.B.; Nurchayati, Nurchayati; Pamuji, S.H.
Dinamika Teknik Mesin Vol 6, No 2 (2016): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Original Source | Check in Google Scholar | Full PDF (262.502 KB) | DOI: 10.29303/dtm.v6i2.13

Abstract

Wind turbine is a technology that converts wind energy to electric power. A Savonius type rotor blade is a simple wind turbine that operates on the concept of drag. The turbine has a potential to be developed as it has a simple construction and it is suitable for low wind speeds. Savonius rotor can be designed with two or three blades in single level or multi-levels. This research was conducted to obtain two levels wind turbine performance characteristics with variations in wind speed and different positions of angle on each level. The variations of the angle position of the wind turbine were 0°, 30°, 45°, 60°, and 90° in each stage. The result shows that the performance of the wind turbine is inversely to the degree of the angle position. The maximum rotation speed of the rotor was about 150.6 rpm that was generated at the wind speed of 5 m/s and the angle position of 0°. 
KARAKTERISTIK KEKUATAN BENDING DAN KEKUATAN TEKAN KOMPOSIT SERAT HYBRID KAPAS/GELAS SEBAGAI PENGGANTI PRODUK KAYU Harsi, Harsi; Sari, Nazmi Herlina; Sinarep, Sinarep
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 5, No 2 (2015): Dinamika Teknik Mesin
Publisher : Universitas Mataram

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Abstract

Wood material is very popular in indonesia and all over the world, there are so many people who use it as their buildings contruction and also for their home tools, because the wood material is strong, long lasting, green living, save and lux. On the other hand the wood material will be mouldy if it meets water, thats why this material is not suitable to be placed in humid or wet places we need a new material that can be used as the subtitution of the wood material. The aim of this research is to know about how to make the composite of cotton/glass hybrid fiber and its mecanical using epoxy matrix, and then compare it with wood product. The wood product that used in this research is mahoni.The composite making is using hand lay-up method and the variety fraction volume of cotton fiber and glass fiber are : 30% : 0%, 25% : 5%, 20% : 10%, 15% : 15%, 10% : 20%, 5% : 25%, 0% : 30 %, the epoxy matrix volume fraction is 70 %, where the orientasion of cotton fiber is rondom and 2 cm in lenght, whereas the orientasion of the glass fiber is equally with fiber lenght up to the lenght of mould. The researcher did some test they are: bending test that based on ASTM D 790 standart, compression test that based on ASTM D 695 standart.The bending strenght’s mean of all volume fraction’s varieties of cotton/glass hybrid fiber composite shows the higher bending strenght than the bending strenght of mahoni which is used as the comparator. Afterwards the pressing strenght’s mean of cotton/glass hybrid fiber composite especially in  20%:10% and 0%:30% fraction volume varieties, which is have the values orderly 37,74 MPa and 47,53 MPa, and it shows the higher pressing strenght than the pressing strenght of mahoni, it is 36,78 MPa. Based on the recearch that have been done we can conclude that the characteristic of mechamical cotton/glass hybrid fiber composite can be used as the (alternative) wood subtitution especially mahoni.
PENERAPAN IPTEK BIOGAS “MENUJU KONSEP DESA MANDIRI ENERGY-DME” DI DESA RARANG LOMBOK TIMUR Mara, I Made; Suartika, I Made
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 5, No 1 (2015): Dinamika Teknik Mesin
Publisher : Universitas Mataram

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Abstract

The implementation of science and communities service project is aimed to minimize destitution by implementing self feeding and energy generating village concept. The specific goal of this project is the utilization of cattle dung to produce a biogas. The method is being used for this project is by illuminating and educating the community to be able to build and operate the cattle dung biogas digester by their own. In addition, the community is completely involved to this project since the early state of this project. By implementing the plastic floating digester, it is hoped that the communities be able to utilize the biogas digester and make their own domestic energy. The result of this program is an unit biogas digester by using cow dung as a feed stock. The plastic floating digester can produce a continue biogas as a fuel for cooking. The enthusiasm of the community in term of using and implementing the digester is quite high. It is expected that the community can build and implement the cattle dung digester to produce biogas as a domestic energy.
Dinamika Teknik Mesin vol 4 no 2 Juli 2014 Dinamika, Dinamika
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 4, No 2 (2014): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Original Source | Check in Google Scholar | Full PDF (489.099 KB) | DOI: 10.29303/d.v4i2.62

Abstract

Dinamika Teknik Mesin vol 4 no 2 Juli 2014

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