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PROGRAM STUDI TEKNIK MESIN - JURUSAN TEKNIK MESIN DAN INDUSTRI - FAKULTAS TEKNIK - UNIVERSITAS SYIAH KUALA, Jln. Syech Abdul Rauf, No. 7, Darussalam, Banda Aceh 23111, Aceh INDONESIA
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INDONESIA
Jurnal Teknik Mesin
Published by Universitas Syiah Kuala
ISSN : 23018224     EISSN : 26230747     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Arjuna Subject : -
Articles 10 Documents
 1 
Search results for , issue "Vol 1, No 2 (2012)" : 10 Documents clear
Kaji Eksperimental Perpindahan Panas Pada Lemari Penyimpan Darah Portable Dengan Memanfaatkan Efek Peltier Ratna Sary; Amir Zaki Mubarak
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
Publisher : Jurnal Teknik Mesin Unsyiah

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Abstract

The process of blood storage is the important part in maintaining the blood quality. After it is donated by the donor, the blood will be stored in a storage cabinet until it is needed by the patient. One of the common ways to preserve and maintain the chemical and structural changes of the blood is to store it in a storage area that has a temperature of between 1-6 °C. Blood storage cabinets that already exist this days, use the vapour compression cycle which is only suitable for the storage of large capacity and is not portable if there is blood demand in remote areas. To answer these problems, in this research will be designed and manufactured portable blood storage cabinet by the size of 30 cm x 30 cm x 30 cm. The heat in the storage is discharged to the air by using a heat pump which works using thermoelectric cooler (Peltier effect). The Peltier effect occurs when two metals or semi-conductors of different materials are connected and energized that there will be a difference in temperature. In order to test the feasibility of the blood storage cabinets technically, the heat transfer study is conducted. The experimental result shows that the expected temperature is achieved.
Karakterisasi Material Penyimpan Kalor Laten Menggunakan Metode T-History Ully Muzakir; - Hamdani; Ahmad Syuhada
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
Publisher : Jurnal Teknik Mesin Unsyiah

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Abstract

The capacity of energy storage and temperature storage has come into consideration in choosing thermal energy storage system. Absorbed or released material either big or small can be determined by finding the value of the specific heat (Cp) and the latent heat fusion (HL). Available method to determine latent heat of fusion (H), specific heat (Cp), temperature melting (Tm) and thermal conductivity (k) are conventional calorimetry method, Differential Thermal Analysis (DTA) and Differential Scanning Calorimetry (DSC). Measurement of physical properties of phase change material using DTA and DSC has disadvantage due to small weight that used for sample (1-10 mg), so that thermophysic of sample usually different when the material is used in large quantities. In this study, T-history method is used to determine thermophysic heat storage material. Examination results show the match value in latent heat (Hm) of paraffin with DSC testing results are 249.42 KJ / kg with 251 KJ / kg. The results of calculations using the T-History for paraffin obtained at temperature Tm 52.72 to 59.9 0C; Cp of 2.54 to 3.57 KJ / Kg.K; Hm at 249.42 KJ / Kg; k of 0, 18 W / mK. For bee-wax Tm obtained at temperatures from 52.4 to 61.79 0C; Cp of 2.65 to 3.45 KJ / Kg.K; Hm of 171 KJ / Kg; k of 0.234 W / mK. For fat cow obtained at temperature Tm 40.82 to 44.10C; Cp of 3.19 to 4.16 KJ / Kg.K; Hm at 60.13 KJ / Kg; k of 0.181 W / mK. It can be concluded after examanination that Paraffin is a good material as a phase change material (PCM) in comparison to bee-wax and beef fat.
Sistem Penggerak Mesin Setengah Pengering (Tipe Vertikal) Asbar R
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
Publisher : Jurnal Teknik Mesin Unsyiah

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Abstract

The half drying machine is a machine utilised to reduce the additional water content in the raw material. The design of the mechanical system is required that the machine is able to work appropriately. The mechanical system is a combination of machine elements which work as the source of power and rotation in the mechanical work which is the forwarded to the additional water content reducing mechanism. The design process is carried out through semantic, graphical and analytical methods which result in appropriate machine elements selection, i.e. electric motor, driver pulley, belt, driven pulley, pin, driven shaft, single line radial ball bearing and the house, single line axial bearing and the house, and the bolt and nut. All of the elements are in a unity with their own support frame which is able to be separated if required. The additional water content reducing process of raw material occurs due to the effect of rotation of the machine to the material.
The Use of Finite Element Method in Analysing the Dynamic Characteristic of a Rotor System Amir Zaki Mubarak
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
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Abstract

Vibration analysis is very essential to be considered in designing a rotor system. The failure in rotor system parts can be avoided by understanding the dynamic characteristic. The objective of this research is to investigate the dynamic characteristic of rotor systems by using finite element method. Finite element method is used to reveal the system characteristic which is derived from the kinetic and potential energy equations. Some models of rotor systems are analysed to understand the dynamic characteristic. The natural frequencies are obtained from the eigen values. The simulation is carried out with the distance of disk from the support as the variable. The result shows that the distance between the disk and the bearing affects the natural frequency of the system.
Kaji Ekperimental Karakteristik Pengeringan Ikan Bandeng Pada Alat Pengering Berbahan Bakar Gas Muhammad Thaib Hasan; Ahmad Syuhada; - Hamdani
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
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Abstract

Aceh is one of the biggest milkfish (chanos-chanos Forsskal)-producing provinces in Indonesia and the production is increasing year by year. However, beyond that prospect, there are disadvantages of the milkfish which are able to be putrid easily and are not able to be kept for a long time. In addition, at the time of great harvest and the fish production is plenitude and less of the fish is in use that the price of the fish decreases sharply. The population of Aceh generally like to consume fresh and dried milkfish especially the people in the rural and highland. Based on the result of the previous research, the drying method which is done by putting the fish under direct sunlight is inefective as the sunlight is not perpetually present as expected. Even the quality of the product is low as the fish is contaminated by flies. In addition it requires large drying areas to produce large quantity fish. In this research, it is conducted eksperimental analysis and drying characteristic of the milkfish in the drying process by using drying equipment with gas fuel. The drying equipment used is the shelf type which is located in Thermal Engineering Laboratory, Mechanical Engineering, Engineering Faculty, Syiah Kuala University. The equipment consists of burning room, drying room and chimney. The weight of  milkfish model is 200 grams, 250 grams, and 300 grams. Based on the test result on the milkfish weighted 200 grams after the drying process, it can be seen that the content of protein 18,97 %,fat 3,75%, water 19,20% with the total drying process of six hour.
Karakteristik Alat Uji Sistem Pendorong pada Autonomous Underwater Vehicle (AUV) Muhammad Tadjuddin
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
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Abstract

Aceh marine area has many potential resources that need to be explored, studied, and conserved. These activities require a suitable mean that has capability to bring data collection and observation tools into the seabed. One of the means that can carry out these jobs is the AUV (Autonomous Underwater Vehicle). AUV has an ability to dive without any supporting cables from the surface. It can be programmed to do the required task in the seabed. One of the most important parts on the AUV is the thruster system, a component that provides the thrust force. A thruster is a mechatronic device consists of power source (battery), motor controller, electric motor, and propeller as the main thrust component. A defect in the thruster design will result in the failure of the AUV thus the design of thruster is critical in an AUV unit. In this research, an experiment apparatus was design and fabricated in order to measure the performance of a thruster. The measurement includes the thrust force, the power consumption, and the total effective working time. The proposed experiment apparatus is expected to assist the design stage of the AUV before fabrication in order to minimize the failure caused by defect in the thruster system.
FEM Simulation of Polycarbonate Alloys-made Sheet under a Drop Weight Impact Test: Deformation and Failure Performances M. Nizar Machmud; Zahrul Fuadi
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
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Abstract

This paper presents a study of deformation and failure performances of a plastic sheet made of polymer alloys subjected to drop weight impact of a cylindrical mass with hemispherical tip at a certain velocity by using dynamic explicit finite element code of MSC. Dytran. An available material model in the finite element system, called piecewise linear plasticity, was applied in the simulation for describing the large strain, non-linear behavior of the polymeric materials. Maximum plastic strain failure criterion was used to simulate the impact failure. In the simulation, the mass served as a rigid surface strikes perpendicularly the potential impact region of an arbitrary designed- plastic sheet that was considered in the form of a fully-clamped circular thin plate. Contact between the mass and plate was applied and friction coefficient m between the mass and plate was assumed to be a constant value of 0.3. In order to study effect of the assumed friction coefficient value, additional simulations of the impact test have been performed using m = 0. Some limitations in the use of the material model were illustrated through the analysis of results from two types of tough polycarbonate (PC) alloys: PC/ABS and PC/PBT blends. Impact force-displacement relationships of each alloy were then compared to the test result.
Low-frequency Stick-slip of A Creep Groan on A Simple Caliper-slider Experimental Model Zahrul Fuadi
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
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Abstract

This paper discussed a preliminary study of low-frequency stick-slip of a creep groan using a simple caliper-slider model. The experiment model is constructed based on the real operating system behind a vehicle braking system. The model consists of a sliding bar, a caliper and an arm. The analysis shows that the main frequency of generated low-frequency stick slip of the creep groan is 100 Hz with sound pressure level of 70 dB. It is found that the low-frequency stick-slip motion the result of the vibration in tangential direction. The frequency of the generated stick-slip is close to the bending natural frequency of the system. Several parameters that are important in the generation of the low-frequency of stick –slip are the sliding velocity and the contact roughness. Therefore, further study of creep groan should take into account these important parameters as well as other operating parameters.
Rekayasa Komposit Serat Sabut Kelapa sebagai penguat dan Styrofoam Sebagai Matriks - Hanif; Sulaiman Thalib; Samsul Rizal
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
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Abstract

Coconut fibre which is extracted from outer shell of a coconut is a type of natural fibre used as composite board reinforcement in this research. The fibrebinder used in this research was stryrofoam which is a material from polysterene. This research was aimed at finding out the appropriate composition by weight between coconut fibre and polysterene and to find out the physical, mechanical and morphological characteristics of composite board resulted from the engineering process. The construction of composite board was started by cutting the fibres with the length of ≤ 5 mm, then dyeing them into NaOH for 4 hours. After those process, the fibres were dried and weighted. The Styrofoam was dissolved into silane before it was weighted based on its composition. After the coconut fibre and polysterene mixtures were mixed,they were poured into the composite board mold. The benefit of this composite board is that it is more water resistant. The test results for tensile, density, moisture content, and thickness swelling meet the Indonesian National Standard (SNI) 03-2105-2006. The flexural strength of composite board which meets the standard is the compositions of 30:70, 40:60, and 50:50, while the compositions of 60:60 and 70:30 do not meet the standard.
Optimasi Penyerapan Panas Memanfaatkan Energi Matahari pada Kolektor M. Iqbal A.P.; Ahmad Syuhada; - Hamdani
Jurnal Teknik Mesin Unsyiah Vol 1, No 2 (2012)
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Abstract

Solar energy is a renewable energy that can be utilized for human needs for various purposes such as electricity, heating, hair, and so forth. Solar collector is a device that collects solar energy and converts it into thermal energy and redirects the energy back into the fluid. Three variations of barrier angle were prepared in order to optimize the absorption of solar energy in a collector. Multiple pass turn were utilized to maximize the heat absorption. The size of the collector is 250 cm × 85 cm. Each side of absober box is coated with aluminum of 10 mm thick. Iron sand is used as absorber with thickness of 6 m. The collector box is tilted with 15° angle. Measurements were carried out for each multiple pass turn angle ; 130°, 180° and 90°. The tests were carried out in an open field in front of the Faculty of Engineering, Syiah Kuala University. The results show that temperature tends to be similar for all three variations of barrier angle. For the barrier angle of 130°, the highest temperature achieved was 93.3°C during 12:00 to 13:00 pm. The highest temperature achieved for the other two variations are 91.2°C for the barrier angle of 90° and 90.2°C for the barrier angle of 180°.

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