International Conference on Design, Energy, Materials and Manufacturedoi: 10.1088/1757-899X/539/1/011001pmid: N/A
PREFACEWe welcome to you the 1st International Conference on Design, Energy, Materials and Manufacture (ICDEMM) held October 24 - 25, 2018 in Bali, Indonesia. It is a great pleasure for the Faculty of Engineering University of Riau and University of Udayana to be the joint host organisation, in the spirit of strengthening of cooperation and mutual growth to be the world class university.The aim of ICDEMM with the theme of “Engineering for Green Technology and Sustainable Development”, is to provide an excellent international forum for engineers, scientists, researchers, academics, practitioners and professionals from all over the world to connect, and to share knowledge and learn about advances in green and sustainable development.The conference run over 2 days with a wide array of quality technical presentations by a number of excellent key note and invited speaker presentations, authors of accepted papers, and the chance for the many participants to meet face-to-face whilst experiencing one of Indonesia’s most vibrant tourist destination. The conference also include a number of social activities such as a conference dinner and a number of opportunities for delegates and accompanying persons to enjoy Bali and its surrounds.Our deepest gratitude to all our speakers, participants, contributors, partners and professional association, who have given this conference their support. We would also like to thank all members of Organizing Committee, Steering Committee, Scientific Committee and Editorial for all of their support and advice. We also owe our success to the full support of the Rector of University of Riau and University of Udayana; the Dean of Faculty of Engineering University of Riau and University of Udayana.We hope that this program will further stimulate research in Mechanical Engineering. We feel honoured and privileged to serve the best recent developments in the field of Mechanical Engineering to you through this exciting program. Thank you and we hope to see you again at the ICDEMM 2020.Feblil Huda PhD Dr.Eng I Made Gatot KarohikaUniversity of Riau University of Udayana Pekanbaru, Indonesia Bali, Indonesia
Peer review statementdoi: 10.1088/1757-899X/539/1/011002pmid: N/A
All papers published in this volume of IOP Conference Series: Materials Science and Engineering have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.
Weighbridge vibration analysis using 3 accelerometer sensors and single excitationSyafri, ; Darman,
doi: 10.1088/1757-899X/539/1/012001pmid: N/A
Weighbridge was a measuring instrument that was widely used by the Ministry of Transportation to scale the weight of loaded vehicles on the roadways. Due to being traversed by vehicles with various kind of weight and sizes, weighbridges often experience resonance due to the vibrations of vehicles above it. This will potentially cause damages to weighbridges. To anticipate it, researches regarding vibration analysis on weighbridge were needed to decrease resonance on weighbridges. The Vibration Analysis was done by Modal Analysis Method using three accelerometers and one shaker as the measurement sensor. In testing, weighbridge was modeled into a cylindrical beam shape with a length of 724 mm and a diameter of 16 mm. As the supports, Fix-fix Support was used at both ends of the beam. Next, Accelerometer measurement sensor mounted in three positions with a distance of 181 mm, 362 mm, 543 mm from beam supports. Then, Excitation force with four frequency variations (1 Hz, 3 Hz, 5 Hz, 10 Hz) was applied to the four measuring points located between the accelerometer sensor. The measurements result in the form of FRF graph can be obtained by QuickDAQ. From the FRF graph, the five lowest natural frequency of the weighbridge was obtained that equal to 89.9 Hz, 91 Hz, 69.9 Hz, 75 Hz, and 96.9 Hz.
Wing design of uav serindit v-1Anuar, K; Akbar, M; Herisiswanto,
doi: 10.1088/1757-899X/539/1/012002pmid: N/A
UAVs are controlled aircraft without the presence of pilots in them. In its use, UAVs have been used for both military and civilian purposes. In the field of plantations, UAVs are used for mapping and monitoring (survey) of an area such as areas of industrial plantations, oil palm plantations and areas of forest fire disaster in a timely and precise manner. To develop a UAV capable of carrying out the mission of mapping the coastal estate’s area, in this research is done wing design UAV which is named serindit V-1. The design process begins with the design concept, then proceed with a preliminary design that aims to determine the dimensions and initial configuration of the wing UAV serindit V-1. Furthermore, the wing UAV serindit V-1 is simulated on XFLR5 software using Clark’s airfoil, GOE 611 and S7055. Simulations were performed to see the characteristics of aerodynamic at takeoff speed (12 m / s), cruising speed (20 m / s) and maximum speed (30 m / s). Simulation result at the take-off speed and cruising speed show the lift coefficients produced by the three airfoils meet the requirements. Then, the highest value of the lift coefficient ratio to the air drag coefficient at cruising speed, produced by airfoil S7055 at a 3-degree angle of attack. Furthermore, the graph of the pitching moment coefficient on all angles of attack produced by the three airfoils shows a negative gradient. This shows the condition of wing stability in the pitching direction.
Multi-step ahead prediction of vapor compression air conditioning system behaviour using neural networksSholahudin, S; Ohno, K; Yamaguchi, S; Saito, K
doi: 10.1088/1757-899X/539/1/012003pmid: N/A
Cooling capacity and super heat temperature control for air conditioning (AC) system operation is necessary to ensure that the system operates efficiently. In this paper, multi-step-ahead prediction of AC system behaviour is presented using backpropagation neural network model as the first effort to develop the effective control strategy. Several step-ahead cooling capacity and superheat temperature performance are predicted under modulation of compressor speed and expansion valve opening. The prediction is proposed to capture the dynamic behaviour of system that can be applied in predictive control purpose. The configuration of ANN model is developed based on nonlinear autoregressive network with exogenous input (NARX) structure. Input and output data for training and validation of ANN model are generated by AC simulator. The ANN model is optimized by investigating the effect of number of neuron and time delay input on prediction accuracy. The results show that the ANN model developed in present study has good accuracy in predicting several step-ahead of cooling capacity and superheat temperature. Accordingly, this ANN model is applicable for predictive control in future study.
Hardness improvement of aluminum alloy 2024 t3 after artificial aging treatmentAstika, I M
doi: 10.1088/1757-899X/539/1/012004pmid: N/A
The needs of having strong and light material for many construction is increasing. Aluminum is one of materials that fulfill this requirement with other advantages such as corrosion resistant and easily formed. Generally, hardness of aluminum and its alloys is lower than ferrous metal such as iron and steel. Aluminum hardness improvement can be conducted by heat treatment namely artificial aging. Artificial aging in aluminum alloy type 2024 T3 in this study was conducted in 2 phases that is solution treatment in 500 °C for 1 hour and continued with artificial aging process in 180 °C by holding time 2, 4 and 6 hours. From the conducted research, it was found that there was hardness improvement on aluminum type 2024 T3 in line with the increasing of aging time. The gained microstructure was getting smooth which means the precipitation hardening process was getting perfect.
Assessment of thermal and transport properties of ionic liquids as suitable absorbent for absorption cooling applicationsAriyadi, H M; Yamaguchi, S; Saito, K
doi: 10.1088/1757-899X/539/1/012005pmid: N/A
Ionic liquids, salts which have liquid phase at temperature below 100°C, have been widely introduced in engineering applications, including absorption cooling systems. The application of ionic liquids in absorption cooling systems is intended to remove the disadvantages of conventional working fluids such as corrosion and crystallization. In terms of thermodynamic performances, theoretical investigation based on solubility behavior of ionic liquids in natural refrigerants show a competitive performance in comparison with conventional working fluid. Nevertheless, heat transfer performance, which is also an important key in absorption cooling systems, particularly in terms of system design and size, needs to be deeply explored and investigated. This study aims to assess the thermal and transport properties of ionic liquids as absorbent in relation to the heat and mass transfer characteristics of these working fluids. The thermal and transport properties of ionic liquids proposed as absorbent for absorption cooling systems are collected, and heat and mass transfer characteristic of these ionic liquids based on their thermal and transport properties are investigated and analyzed. Finally, the most suitable ionic liquids for absorption machines, both in terms of thermodynamics and heat and mass transfer performances can be proposed.
Study of stinging nettle fibers as a reinforcing of composite materials based on its growing regionSuryawan, I G P A; Suardana, N P G; Winaya, I N S; Suyasa, I W B; Lokantara, I P
doi: 10.1088/1757-899X/539/1/012006pmid: N/A
Stinging nettle is a perennial herbaceous plant belonging to the Urticaceae family, In Bali Indonesia called jelatang. This species is considered a weed in intensive agriculture as its fast vegetative growth and high densities enable increased spread and soil coverage. In Tabanan Bali Indonesia several places to grow are in Denbantas altitude 200-500 meters and in Bedugul altitude 1000 -1500 meters above sea level. Nettle fibers are natural fibers that can be utilized as reinforcement for composite materials. Natural fibers have been used worldwide as a potential replacement for glass fiber reinforced composites, over the last few years has been applied in the automotive sector, aircraft interior and interior of the building. Properties of the natural fiber is lighter, easier to handle, not abrasive, and low cost. The objective of this study was to compare the composition and the tensile strength of the fiber nettle based growing areas from Bedugul and Denbantas. The method used is a fiber tensile test equipment, fourier transformer infrared red (FTIR), thermo-gravimetric analysis (TGA) and scanning electron microscope (SEM). From the research of nettle fibers that stinging nettle from Denbantas has a better tensile strength than Bedugul nettle. The TGA test the visible fiber from Denbantas is superior when used as a composite reinforcement.
Investigation and analysis on the performance of hydraulic ram pump at various design its snifter valveSucipta, M; Suarda, M
doi: 10.1088/1757-899X/539/1/012007pmid: N/A
Hydraulic ram pumps are equipped with air vessel to reduce the pulsation of the pumping water flow and the acceleration head loss. In their operation, the amount of air available in the air vessel will be decreased continuously flowing out with delivery water. In order to replace the air volume in the air vessel, the hydraulic ram pump is equipped with a snifter-valve. However, in its implementation, this valve is a hole or orifice with a diameter of 2 mm at a distance of about 2 cm below the delivery valve on the body of the hydraulic ram pump. On the other hand, this will reduce the water hammer pressure that occurs, furthermore, it reduces the performance of the hydraulic ram pump. Based on its working principle, a snifter-valve is an automatic anti-vacuum valve or a non-return valve or check valve. Therefore, the work has been carried out to investigate and analyze the performance of a hydraulic ram pump without a hole or any snifter-valve, with a hole of 1 mm diameter, and equipped with a check-valve of 1 mm orifice diameter. The results showed that the snifter-valve with check-valve of 1 mm orifice diameter gives the best hydraulic ram pump performance for the hydraulic ram pump model that has been investigated.
Investigation on flow pattern in a hydraulic ram pump at various design and setting of its waste valveSuarda, M; Sucipta, M; Dwijana, I G K
doi: 10.1088/1757-899X/539/1/012008pmid: N/A
A hydraulic ram pumps are simple structures, consisting of two moving parts, the waste valve and the press valve. The waste valve mainly affects the magnitude of the impulse force generated. However, interaction of all elements of hydraulic ram pump system influence each other makes its operation becomes complex. Moreover, a detailed description of this hydraulic ram pump has not been well understood. In order to get the hydraulic ram pump designs, it needs to recognize comprehensively the water flow phenomenon that take place in the hydraulic ram pump working cycles. Therefore, visualization of the water flow characteristic in the hydraulic ram pump is done by constructing a hydraulic ram pump model using a transparent material that is acrylic. The characteristics of the waste valve are affected by parameters such as the orifice diameter of the valve, the diameter of the valve disk, the step length, and the valve weight and the discharge and water head of the hydraulic ram pump drive. Besides all these parameters affect each other. Therefore, in this experiment, experimental testing was conducted in the laboratory on hydraulic ram pump waste valve model to investigate the effect of waste valve orifice and disk diameter on hydraulic ram pump. The results showed that the diameter of orifice and disk of the waste valve have significantly influencing the flow pattern in the hydraulic ram pump body and its time movement each stage of the cycle. The greater the diameter of the orifice and the disk of the waste valve the velocity of water that has vortex more and more, so the speed of water flow in the body of the pump also decreases. Furthermore, the larger the diameter of the waste valve disk the shorter the interval of the hydraulic ram pump valve movements, so the frequency of the hydraulic ram pump valve movement increases.