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INDONESIA
Cylinder : Jurnal Ilmiah Teknik Mesin
Published by Universitas Katolik Indonesia Atma Jaya
ISSN : 2252925X     EISSN : 30469821     DOI : https://doi.org/10.25170/cylinder
Core Subject : Science, Engineering,
Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Cylinder: Jurnal Ilmiah Teknik Mesin is an open-access peer reviewed journal that aims to publish original articles on research and development in the field of engineering and applied science. Topics of interest include, but are not limited to: - Renewable Energy & Thermofluids - Material & Manufacturing - Mechatronics, Robotics, & Optoelectronics - Mechanical Design & Mechanism - Industrial Engineering & Ergonomics - Automotive Engineering - Environmental Engineering
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 8 Documents
 1 
Search results for , issue "Vol. 1 No. 1 (2014): APRIL 2014" : 8 Documents clear
The Methods for Efficient Transverse Vibration of Structural Dynamics: a Historical Point of View A. Rugerri Toni Liong
Cylinder : Jurnal Ilmiah Teknik Mesin Vol. 1 No. 1 (2014): APRIL 2014
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

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Abstract

The different assumptions and corresponding theories of transverse vibrations of beams are presented. Eight mathematical models, namely Euler-Bernoulli, Rayleigh, Euler-Bernoulli modified, Bress, Volterra, Ambartsumyan, Timoshenko and Love theory are firstly discussed. Then, different theories of dynamic behaviours of beams can be obtained from the equations of the theory of elasticity, which are presented with respect to average values. Nowadays, beam elements are usually based on two theories, i.e Euler-Bernoulli and Timoshenko beam theory. One of the recent developments pointed out is the computer program ABAQUS, a finite element based crosssectional and non-linear analysis for beam. Finally, several examples are presented as numerical validations in which FE results are compared with those from the theories in the literature where available and appropriate.
Korelasi Temperatur Udara dan Intensitas Radiasi Matahari Terhadap Performansi Mesin Pendingin Siklus Adsorpsi Tenaga Matahari Tulus B. Sitorus; Farel H. Napitupulu; Himsar Ambarita
Cylinder : Jurnal Ilmiah Teknik Mesin Vol. 1 No. 1 (2014): APRIL 2014
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

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Abstract

One utilization of solar energy is adsorption refrigeration cycle where its performance is influenced by the air temperature and solar radiation intensity. This research aims to determine the effect of air temperature and solar radiation intensity on the performance of the solar adsorption refrigeration. This testing uses activated carbon adsorbent of 8 kg and 2 litres methanol refrigerant. The test results showed that the value of maximum COP obtained 0.064 and the minimum COP is 0.028. The lowest water temperatures that can be reached during the process of adsorption is 8.24oC. Correlation exists between the air temperature and solar radiation intensity on the COP value is significant so as to obtain mathematical equations. Air temperature correlation with the solar radiation intensity is 0.90 and the correlation of the intensity of solar radiation with the COP obtained -0.88. While the value of the correlation coefficient of the air temperature with COP is -0.95. Also obtained the coefficient of determination is 90.45%, which indicates that the influence of air temperature and solar radiation intensity on the coefficient of performance is 90.45%.
DESIGNING AND BUILDING A WATER LEVEL CONTROL DISPLAY BY IMPLEMENTING WATER CONDUCTIVITY AND MICROCONTROLLER Elroy Neil Sudiro; Anthony Riman; Eric Jobiliong
Cylinder : Jurnal Ilmiah Teknik Mesin Vol. 1 No. 1 (2014): APRIL 2014
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

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Abstract

Buoy is used to control water level in a water storage tank. However, this system has several weakness due to various problems of the mechanical parts, causing it to lose control. The purpose of this research is to design and build a water level control system display by employing water conductivity and microcontroller which is able to overcome the disadvantages of the mechanical system. The proposed system uses three wires as sensors. This report discusses the materials needed, the way of development, and the changes from the previous system design in the earlieast study to the final system. Based on the research conducted, the advantages of this system are the ability to use water from multiple sources, and through the usage of solenoid valves it can operate fully automatic. The disadvantage is that relatively long to drain due to the small aperture of the valve.
Komparasi Kinerja Turbin Angin Sumbu Vertikal Darrieus Tipe- H Dengan Bilah Profil NACA 0018 Dengan dan Tanpa Wind Deflector Indra Herlamba Siregar
Cylinder : Jurnal Ilmiah Teknik Mesin Vol. 1 No. 1 (2014): APRIL 2014
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

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Abstract

The length of 80791.42 km coastline Indonesia is a potential area for the development of wind energy with wind speeds average is generally between 3 m / s to 5 m/s, the total wind energy potential is estimated to reach 9 GW. However, the geographical Indonesia as a tropical country has characteristics of wind direction in Indonesia frequent changes, which condition is causing the sustainability of energy production from horizontal axis wind turbine rotor turbine disrupted due must always deal with the arrival of the wind direction. It required the design of the turbine according to the characteristics and the wind speed in Indonesia. In the present study to see the effect of adding wind deflector on the performance of vertical axis wind turbine models Darrieus type-H blades with NACA 0018 profile of the tested wind speed 2.86 m / s and 3.43 m / s and a pitch angle of 150, 200, 250 and 300 with a load of 200, 250 and 300 gr. The results presented that the addition of wind deflector can improve the performance of vertical axis wind turbines Darrius type-H in the form of 56.37% power turbine and turbine performance coefficient of 65.03% on the pitch angle 300 at wind speed 3.43 m / s
Practical Media Using Real Products in Bandung State Polytechnic for Manufacturing Gamawan Ananto
Cylinder : Jurnal Ilmiah Teknik Mesin Vol. 1 No. 1 (2014): APRIL 2014
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

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Abstract

In Bandung State Polytechnic for Manufacturing (Polman), like other vocational education institution, practical program in its workshop had the aim to build students skill competencies. For those, number of items in a structured exercise is created, combined with the real products from industrial collaboration that gave the benefits for both parties, such as fund generating for operation costs. Jobshop is the interesting type of products for the students due to its variety challenges, used the ‘process group’ layout that had advantages for variety requirements, and its appropriateness with practical media work. Jobshop items are normally initiated by inquiry or demand. Many projects may confirmed in the short term of time, or could be only few demands on the other period. Therefore this jobshop had the machine load fluctuation consequence regarding variety process needed and inquiries dependence. Minimizing such fluctuation, Batch Product could be combined for buffering media work and keep the education program machiningoperation is running due to Batch certain demand and time. Regarding the characteristic differences between jobshop and batch --that used ‘product group’ layout-- related with competency that the students should get, creating batch area separately caused better timeschedule and order handling properness. It also encourages the student practical product spectrum wider since its comprehensive activities in each area and more focus execution of all involved parties to each kind of jobs. The other important thing is that order handling arrangement should be well planned and prepared. Any inquiries must be handled with good coordination in the organization professionally regarding the QCD necessity in the real production activity.
Penerapan Metode Substruktur Dalam Analisis Dinamika Rotor Ramses Hutahaean
Cylinder : Jurnal Ilmiah Teknik Mesin Vol. 1 No. 1 (2014): APRIL 2014
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

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Abstract

To analyze complex and large structures, there are difficulties on analizing the whole complete structure regarding the limited computer memories, a large degree of freedom requires a long execution time. In practical term, the analysis of the overall structure is also not efficient. If there is any changes to one component of the structure, it must be re-analyzed as a whole complete structure. By using substructure analysis, the analysis of complex and large structure become more efficient and pratical. In this paper will be disscussed the application of substructure analysis of disc-bladed rotor.
STUDI EKSPERIMENTAL DAN PEMODELAN MATEMATIKA PROSES PENGERINGAN KAKAO ENERGI SURYA SECARA INTERMITTENT Haznam Putra; Farel H. Napitupulu; Himsar Ambarita; Siti Farah Dina
Cylinder : Jurnal Ilmiah Teknik Mesin Vol. 1 No. 1 (2014): APRIL 2014
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

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Abstract

In this research, the behavior of cocoa drying using solar dryers have been studied. Experiments conducted on drying cocoa beans that have been fermented first. Cocoa plantations are taken from the area around North Sumatra - Indonesia. Solar energy is used as a source of energy that save and clean for drying. Cocoa is a mainstay in Indonesian commodities, but the quality of the current generated is relatively low. As the aims of this research is gain quality with mathematical modeling of drying by producing good quality cocoa. Preparation phase starts from cocoa fermentation process. With some testing times cocoa taken one test where the results of fermented cocoa that has been washed and dried from water content 55.83% to 7.01% (db), which lasted for 3 (three) days ie, 22 to 24 April 2013 from at 7:00 to 17:00 pm (intermittent). The study was conducted at the Solar Energy Laboratory, Faculty of Engineering Department of Mechanical Engineering of North Sumatra University Medan. It is located in Medan city with the position of 33.6 ° N - 98.4 ° W, altitude 200 meters above sea level and meridian time (GMT +7). From the experimental results obtained experimental equation mathematical model for intermittent drying of cocoa, with the value being the value of the diffusivity coefficient of 1.39 x 10^-10 to 1.85 x 10^-10 m^2/sec, besides the quality of the dried cocoa in this study better than dried cacao directly under the sun.
Penentuan Hubungan Antara Defleksi Lateral dan Radial Poros Baja Pada Berbagai Jenis Tumpuan Secara Teoritik Viktus Kolo Koten; Duma Hasan
Cylinder : Jurnal Ilmiah Teknik Mesin Vol. 1 No. 1 (2014): APRIL 2014
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

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