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All Journal Rotasi SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Sinergi JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) Jurnal Teknik Mesin Indonesia Scientific Journal of Mechanical Engineering Kinematika International Journal of Advanced Technology in Mechanical, Mechatronics and Material (IJATEC)
Fajar Anggara
Universitas Mercu Buana
Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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THE IMPLEMENTATION OF ARTIFICIAL NEURAL NETWORKS IN DESIGNING INTELLIGENT DIAGNOSIS SYSTEMS FOR CENTRIFUGAL MACHINES USING VIBRATION SIGNAL Dedik Romahadi; Fajar Anggara; Andi Firdaus Sudarma; Hui Xiong
SINERGI Vol 25, No 1 (2021)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2021.1.012

Abstract

It is important to maintain every machine affecting the process of making sugar to ensure excellent product quality with minimal losses and to accelerate productivity and profitability targets. The centrifuges are widely used in industry today with some being very difficult and critical for surgery, and the collapse of the engine has the ability to cause expensive damage. One of these is the centrifugal machines, and they are expected to be efficient to produce high-quality sugar. Meanwhile, an efficient diagnostic tool to predict the correct time for centrifugal repair is vibration signal analysis namely by attaching the accelerometer sensor to the location of the centrifugal bearing to produce vibration data that is ready to be analyzed. Still, the process requires sufficient insight and experience. The manual method usually used is complicated and requires a lot of time to obtain results of a centrifugal diagnosis. Therefore, this study was conducted to design an intelligent system to diagnose centrifugal vibrations using Artificial Neural Networks (ANN). The situation is involved in applying and training the concept of vibration analysis from spectrum data to ANN to produce diagnostic results according to the spectrum diagnosis reference. The results obtained were quite good with the largest cross-entropy value of 10.67 having 0% error value with the largest Mean Square Error value being 0.0023 while the smallest regression was 0.993. The test conducted on nine new spectrums produced eight true predictions and one false. The system can provide fairly accurate results in a short time. Classification quality improvement can be made by adding training data.
Bayesian networks approach on intelligent system design for the diagnosis of heat exchanger Dedik Romahadi; Fajar Anggara; Rikko Putra Youlia; Hifdzul Luthfan Habibullah; Hui Xiong
SINERGI Vol 26, No 2 (2022)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2022.2.001

Abstract

The heat exchanger highly influences the series of cooling processes. Therefore, it is required to have maximum performance. Some of the factors causing a decrease in its performance are increased pressure drop in the Plate Heat Exchanger (PHE), decreased output flow, leakage, flow obstruction, and mixing of fluids. Furthermore, it takes a long time to conclude the diagnosis of the performance and locate the fault. Therefore, this study aims to design an intelligent system for the performance diagnosis of the PHE using the Bayesian Networks (BNs) method approach. BNs are applied to new problems that require a new BNs network model. The system was designed using MSBNX and MATLAB software, comprising several implementation stages. It starts by determining the related variables and categories in the network, making a causality diagram, determining the prior probability of the variable, filling in the conditional probability of each variable, and entering evidence to analyze the prediction results. This is followed by carrying out a case test on the maintenance history to display the probability inference that occurs during pressure drop on the PHE. The result showed that the BNs method was successfully applied in diagnosing the PHE. When there is evidence of input in the form of a pressure drop, the probability value of non-conforming pressure-flow becomes 61.12%, PHE clogged at 73.59%, and actions to clean pipes of 70.18%. In conclusion, the diagnosis carried out by the system showed accurate results.
Effectiveness of capsules installation containing paraffin wax in a solar water heater Muhammad Nadjib; Wahyudi Wahyudi; Fajar Anggara; Yosua Heru Irawan
SINERGI Vol 26, No 2 (2022)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2022.2.012

Abstract

The encapsulation technique is one way to use latent heat storage material in a solar water heater tank. In this technique, several capsules may be arranged in the tank. In this study, the capsules were installed along the cross-section of the tank. There has been no discussion of which part of the capsule position has optimal heat energy with a capsule arrangement. Proper placement of the capsule arrangement can result in optimal thermal energy storage in the tank. This study aimed to investigate the effectiveness of installing capsules in a tank with different positions in terms of thermal energy storage. The study used an active solar water heater. The 24 capsules containing paraffin wax were arranged in a tank. The solar simulator was used as a heat source for the collector, and it was set at 1000 W/m2. The flow rate of water was 2 liters/minute. During the charging process, the water and paraffin wax temperature was recorded. The temperature evolution of water and paraffin wax obtained were used to analyze the thermal energy content. The results showed that the average heating rate for water and paraffin wax was 0.246 °C/min and 0.254 °C/min, respectively, so the capsule arrangement served as a suitable heat exchanger. The capsules installed at the top had an average heating rate increase of 111.4% compared to those at the bottom. Therefore, mounting the capsule at the top of the tank was more effective than placing it at the bottom. 
Numerical analysis of the vortex flow effect on the thermal-hydraulic performance of spray dryer Fajar Anggara; Dedik Romahadi; Alief Luthfie Avicenna; Yosua Heru Irawan
SINERGI Vol 26, No 1 (2022)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2022.1.004

Abstract

The use of a spray-dryer is very popular in the drying process in the food and beverage industry. However, due to the properties of the sensitive product that the quality will degrade in drying at high temperature, the innovative design of spray-dryer is developed which can increase the heat transfer rate at moderate temperature. This research was conducted to develop a spray-dryer design to improve thermal-hydraulic performance, with a high transfer rate and low-pressure drop at such a temperature. The design varies by several inlets categorized as design A with one inlet, design B with two inlets, and design C with three inlets. This simulation uses ANSYS FLUENT17, and the independence of the mesh was evaluated to improve the result of the simulation. The efficient mesh number is obtained from the independence of the mesh at around one million. The result shows that design C has the lowest pressure loss and the highest transfer rate due to high vortex and swirl flow generation, improving the mixture quality and direct contact between droplet and dry-air. 
The Mechanical Properties Requirement for Polymer Composite Automotive Parts - A Review Muhamad Fitri; S. Mahzan; Fajar Anggara
International Journal of Advanced Technology in Mechanical, Mechatronics and Materials Vol 1, No 3 (2020)
Publisher : Institute for Research on Innovation and Industrial System (IRIS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37869/ijatec.v1i3.38

Abstract

Indonesia has a large variety of natural fibers in abundance. Some of natural fibers become organic waste if not used for something needed by humans. One of the potential uses of natural fiber composite materials is to be used in automotive components. But before natural fiber composites are used in automotive components, it is necessary to examine first what are the requirements for mechanical properties or other properties required by the automotive components. Especially the automotive components which have been made from Polymers, like  dash board, Car interior walls, front and rear bumper and Car body, etc. Each of these automotive components has different function and condition, and that caused different mechanical properties needed. The purpose of this study is collecting the data from the literature, related to the properties needed for these automotive components. This study was conducted by studying the literature of research journals in the last 10 years. From the research journals, data on the requirements of mechanical properties for automotive components will be collected. Furthermore, the data of mechanical properties required for automotive components can be used as a reference to determine the reliability of automotive components made from composite
STUDI NUMERIK: PENGARUH DEBIT INLET TERHADAP KARAKTERISTIK PELELEHAN PARAFFIN WAX PADA TABUNG SILINDER Fajar Anggara; Henry Carles; Pathur Razi Ansyah
Scientific Journal of Mechanical Engineering Kinematika Vol 4 No 1 (2019): SJME Kinematika Juni 2019
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (550.132 KB) | DOI: 10.20527/sjmekinematika.v4i1.48

Abstract

Latent Heat Thermal Energy Storage (LHTES) is the method to store thermal energy by changing the phase of Phase Change Material (PCM). This method is being developed to store heat loss for increasing energy efficiency. In this paper, the effect of variation flow rate on the melting characteristics PCM was investigated by three-dimensional numerical simulation using ANSYS FLUENT 17. The set-up of this research was carried out on concentrically two cylindrical tubes with diameter outer tube 10 cm and length 60 cm while diameter inner tube 5 cm and length 50 cm. The inner tube is used as a PCM container and the outer tube which has bottom and top hole is used as Heat Transfer Fluid (HTF) circulation. Variation HTF or hot water flowrate was carried out by 4L / min, 8L / min and 12 L / min while the temperature is kept at 75oC, then flowed through bottom hole and out to top hole. From this study it was found that the variation flow rate did not have significant effect on the melting pattern, only the greater flow rate, the smaller melting time. Natural convection is the main role of heat transfer when melting.
INVESTIGATION OF NUMERICAL ANALYSIS IN THE EFFECT OF COMPARISON OF INLET AND OUTLET DIAMETER OF GUIDE VANE ON VELOCITY PROFILE Roy Ama Ratu; Fajar Anggara
Scientific Journal of Mechanical Engineering Kinematika Vol 5 No 1 (2020): SJME Kinematika Juni 2020
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v5i1.98

Abstract

Because of the very uneven or spread wind output of condenser, it is necessary to design ducting as the condenser wind flow directors. It is expected to be able to direct the condenser wind output flow and maintain the stability of the amount of wind that will be received by the propeller. One of the ways is by making variations in the design of the ducting and guide vane ducting in order to get the optimal flow or wind gusts from the flow of wind that will be exhaled by the condenser. The aim of this research is to find the effect of dimension ratios and the best ratio value to the variation of profile ducting design using a comparison of the dimensions of the guide vane diameters and the length of the guide vane with the Computational Fluid Dynamics (CFD) method. In this research using the ratio of the guide vane diameter that is contained D1 and D2 on the guide vane diameter. With the results of the investigation produce the best and optimal design to flow condenser wind flow where Variation C provides a maximum speed of 7m / s to 7.2 m / s and directs to moving and rotating blades or blades generator.
NUMERICAL STUDY: COMPARISON THE EFFECT OF RATIO LENGTH AND DIAMETER GUIDE VANE OF AIR FLOW ON OUTLET DUCTING Fajar Anggara
Scientific Journal of Mechanical Engineering Kinematika Vol 5 No 2 (2020): SJME Kinematika Desember 2020
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v5i2.178

Abstract

Guide vane has an important role for conditioning flow pattern of fluid velocity. With the configuration of axial turbine blade, the flow pattern near wall must have the highest velocity. As such that intention, this research is conducted to compare between the effect of dimension ratio of length and diameter of guide vane using ANSYS FLUENT 17. The dimension ratio of guide vane has been divided into two types with each of types has three variations. Type 1 is ratio of length that having variation A, B and C, whilst type 2 is ratio of diameter with D, E and F variations. The result shows that variation B and F produces the highest velocity. Because the effect of acceleration on variation B is maximum so that it increases the velocity, while on variation F has the smallest angle of guide vane that would reduce the drag force.
EVALUASI KINERJA ESP DN1800 UNTUK MENAIKAN PRODUKTIVITAS SUMUR MINYAK Fajar Anggara
Scientific Journal of Mechanical Engineering Kinematika Vol 6 No 1 (2021): SJME Kinematika Juni 2021
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v6i1.185

Abstract

The use of the Electrical Submersible Pump (ESP) in the oil lifting method is very popular because it is easy to install, less required installation of tools in the field and a high efficiency. To achieve the Q target, ESP parameters such as the number of stages and RPM need to be analyzed to align with the IPR (Inflow Performance Flow) curve. The use of nodal analysis is used to determine the relationship between Pwf and head pump. Iteration needs to be done to determine the range of the number of stages so that it aligns with characteristics of well. It is found that the recommended range stage is 580-600 at a well depth of 7684 ft. Moreover, it is found that with 3600 RPM and 600 stages is able to reach the Q target. The relationship between the number of stages and RPM value with Pwf is inversely proportional.
Simulasi kontur distribusi suhu dan kecepatan fluida pada heat exchanger type shell and tube aliran dua stage sistem counter flow dengan computational fluid dynamics (cfd) Achmad Ramadhan Muzaki; Fajar Anggara
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 16, No 1 (2022): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.16.1.6-13

Abstract

The simulation of temperature and velocity distribution contours is designed to produce output regarding the capability and reliability of the shell and tube heat exchanger system, as input in the framework of assessing system development and optimization of operating results. This research was conducted numerically with a variation of hot fluid input flow of 0.8 kg / second and a cold fluid input flow of 1 kg / second and variations in hot inlet temperatures: 60 ° C, 90 ° C, 120 ° C, cold temperature inlet variations: 15 ° C, 16 ° C, 18 ° C using the Computational Fluid Dynamics (CFD) method on the ANSYS software. In this study, the design contours of the temperature and velocity of the outlet of hot fluid and outlet of cold fluid can be determined with the following variation results: the contour of the temperature distribution of hot fluid is seen on the lowest part of the wall which has a blue color and the highest has a red color, while the cold fluid shows a temperature. the lowest is dark blue and the highest temperature is light blue. The velocity distribution contours of hot and cold fluids can be seen on the lowest part of the wall which has a blue color and the highest has a yellow green color.
Co-Authors Achmad Ramadhan Muzaki Alief Avicenna Luthfie Andi Firdaus Sudarma Aswin Aswin Darwin Sebayang Dedik Romahadi Gian Villany Golwa Henry Carles Hifdzul Luthfan Habibullah Hui Xiong Hui Xiong Imam Hidayat Muhamad Fitri Muhammad Nadjib Nur Indah Pathur Razi Ansyah R. Ariosuko Rikko Putra Youlia Rita Sundari Roy Ama Ratu S. Mahzan Subekti Subekti Subekti Wahyudi Wahyudi Yosua Heru Irawan