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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
I.B. Alit, I.B.
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Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

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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.
Pengeringan biji jagung menggunakan pengkondisi udara Mulyanto, A.; Mirmanto, M.; Susana, I.G.B.; Alit, I.B.; Nuarsa, I.M.
Dinamika Teknik Mesin Vol 9, No 1 (2019): 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.v9i1.262

Abstract

This study aims to determine the effect of air velocity on the rate of drying corn. Corn seeds were placed after the evaporator of an air conditioner, so that the air came out of the evaporator entered the drying chamber. The water in the corn was evaporated and sucked by dry cold air and then it was condensed in the evaporator. The results show that the mass of corn seeds decreases with the time; the drying rate also decreases with the time and mass-based drying rates at low air speeds are faster than at high air speed. The air conditioner can be used for drying seeds.
Kinerja mesin air water harvester dengan evaporator koil pada berbagai kecepatan udara masuk Mirmanto, M.; Alit, I.B.; Maulana, A.
Dinamika Teknik Mesin Vol 14, No 1 (2024): 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.v14i1.828

Abstract

An experimental study regarding the performance of air water harvester was conducted at the natural ambient conditions. The air water harvester consisted of 3 coil evaporators and used R134a as the working fluid. The coil evaporators were constructed from copper tubes with a diameter of 6.35 mm, coil number of 26, and coil diameter of 8 cm. The air intake velocities were 4 m/s, 5 m/s, 6 m/s. The results show that the highest water mass is 1.72 kg for 7 hours at the air velocity of 6 /s, and the total heat transfer rate is 582 J/s. Increasing the air intake velocity raises the fresh water mass and the total heat transfer rate. Based on EUR the machine is not effective yet but based on the price of the water the machine gives benefit.
Penurunan konsumsi bahan bakar pada mesin bensin 4 langkah 1 silinder dengan menggunakan medan magnet elektomagnetik Mara, I.M.; Alit, I.B.; Nuarsa, I.M.
Dinamika Teknik Mesin Vol 11, No 1 (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.v11i1.374

Abstract

The quality of gasoline fuel is very important; therefore scientists are trying hard to improve the quality of this fuel. One of them is treating the fuel before it enters the combustion chamber or before experiencing the combustion process. The use of permanent magnets can reduce fuel consumption, and reduce exhaust emissions. This study aims to investigate the reduction of fuel consumption of a single-cylinder four-stroke gasoline engine by using electromagnetic field. Diameter and length of the copper wire used are 0.7 mm and 80 meters. The effect of the magnetic field on the engine performance was observed at various engine speed, such as 1500, 3000, 4500 and 6000 rpm. The results showed that the electromagnetic of solenoid winding reduced the specific fuel consumption. The percentage of reduction in the specific fuel consumption is 18.93%.
Uji performance turbin Savonius dengan penambahan konsentrator pada aliran air Alit, I.B.; Mara, I.M.; Susana, I.G.B.; Sapri, S.
Dinamika Teknik Mesin Vol 9, No 1 (2019): 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.v9i1.261

Abstract

Utilization of water energy is essentially using potential energy and kinetic energy, kinetic energy flow of water which is a transformation of gravitational potential energy is used to drive turbines or waterwheels, Savonius turbine has a good Self Starting so it can rotate the rotor even though the fluid speed is low, the same thing the speed of the water flow has a low speed. The purpose of this research is to know the influence of the number of blades on rotation of rotor (n), Torque (T), Rotor power (P), Coefficient of performance (CP), Efficiency system (ɳs), in this study the number of blades used are 2 blades, 3 blades and blades, the blades are then tested without the use of concentrator and by the addition of concentrator. The results of this study indicate that the turbine without concentrator or by using the addition of concentrator obtained the best performance on the number of blade 3 with average CP of 0.12 and 0.13 efficiency system of 9.83% and 11.75% then with the number of blades 2 with CP averaging of 0.10 and 0.11 of efficiency system of 8.73% and 11.00% and the number of 4 blades with CP averaged 0.06 and 0.07 and efficiency system of 3.91% and 4.76%. Using the addition of concentrator may increase the performance of the turbine in water flow savonius seen from the increasing value of CP and system efficiency at each number of blades tested.
Evaluation of the temperature of the rotary dryer with LPG fuel in drying cherry coffee Alit, I.B.; Susana, I.G.B.; Adhi, I.G.A.K.C.; Mulyanto, A.
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.v15i1.968

Abstract

Utilization of rotary dryers with liquefied petroleum gas (LPG) energy sources as an alternative to solar drying, which is highly dependent on the weather. This dryer is applied to small farmers to dry cherry coffee. The results of the study showed that the drying temperature reached an average of 63.92oC to dry a sample of 10 kg of cherry coffee. From testing, this sample still produced a reasonably high outlet temperature of the drying chamber, which was an average of 62.07oC. From this condition, it is possible to increase the amount of cherry coffee to be dried, and further testing is needed. LPG-based rotary dryers are very easy for small farmers. The drying process can be carried out all the time because it does not depend on the weather. In addition, LPG in Indonesia for small farmers is still subsidized, so it is economically affordable. The shorter drying time than solar drying allows small farmers to carry out their production process sustainably. In 20 hours of testing, it was able to reduce the moisture content from 62.84% to 9.95%.
Co-Authors A. Maulana A. Mulyanto Adhi, I.G.A.K.C. I Gede Bawa Susana M. Mirmanto, M. M. Wirawan, M. Mara, I.M. N. Nurchayati, N. Nuarsa, I.M. Nurchayati Nurchayati S.H. Pamuji, S.H. Sapri, S. Sayoga, I.M.A. Sutanto, R. Wardani, K.