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All Journal Teknotan: Jurnal Industri Teknologi Pertanian Mechatronics, Electrical Power, and Vehicular Technology Fibusi (Jurnal Online Fisika) Widyariset Jurnal Otomasi Kontrol dan Instrumentasi Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Teknologi Indonesia Ketenagalistrikan dan Energi Terbarukan Advances in Food Science, Sustainable Agriculture and Agroindustrial Engineering (AFSSAAE) Widyariset TIN: TERAPAN INFORMATIKA NUSANTARA

Hilman Syaeful Alam

Indonesian Institute of Sciences

Author-ID : 223914

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Social Sciences Veterinary Other

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PERANCANGAN DAN EVALUASI UNJUK KERJA SISTEM AKUISISI DATA SENSOR GAYA TIGA DERAJAT KEBEBASAN Putra, Rian Adi; Alam, Hilman Syaeful; Aminudin, Ahmad
ISSN
Publisher : Program Studi Fisika

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Perancangan sensor gaya tiga derajat kebebasan merupakan penelitian penting dan menantang untuk menghasilkan sensor gaya yang dapat mengukur serempak tiga komponen gaya secara akurat dan efisien. Kebutuhannya dari waktu ke waktu dalam berbagai industri semakin memacu perbaikan kualitas. Sistem akuisisi data merupakan salah satu faktor penting dalam perbaikan kualitas sensor. Penelitian ini ditujukan untuk mendapatkan rancangan dan hasil unjuk kerja sistem akuisisi data pada sensor gaya tiga derajat kebebasan berdasarkan tingkat akurasinya melalui pengamatan common systematic error, namun tidak disertai evaluasi ketidakpastian pengukuran. Common systematic error dalam penelitian ini terdiri dari linieritas, instrumental error dan cross coupling error. Penelitian sebelumnya merancang sensor gaya menggunakan virtual prototyping technique dengan hasil cross coupling error terbesar sebesar 1,67%. Disain sensor gaya yang digunakan pada penelitian ini mengacu pada penelitian tersebut dan mengamati hanya pada tiga axis-nya. Hal ini dilakukan mengingat belum adanya penelitian dengan acuan disain tersebut secara eksperimen. Hasilnya diperoleh sistem akuisisi data eksternal dengan output pada layar komputer melalui komunikasi serial. Dan tingkat akurasi terbesar dari tiap axis-nya melalui pengamatan common systematic error, namun tanpa disertai evaluasi ketidakpastian pengukuran adalah 2,55%. Berdasarkan hasil tersebut penelitian ini dapat digunakan sebagai referensi perancangan dan unjuk kerja sistem akuisisi data dan/atau acuan cross coupling error secara eksperimen untuk disain sensor gaya menggunakan virtual prototyping technique pada ketiga axis-nya.

DESIGN OF GROUND WATER QUALITY AND CAPACITY MONITORING SYSTEM FOR ASR INFILTRATION WELL USING WIRELESS Alam, Hilman Syaeful; Munandar, Aris; Soetraprawata, Demi; Turnip, Arjon
Teknologi Indonesia Vol 36, No 2 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v36i2.200

Design of a monitoring system for the quality and capacity of water absorption wells type Aquifer Storage and Recovery (ASR) using wireless system has been conducted by monitoring changes in well water surface level, the rate of change of fl ow capacity (fl ow rate) and changes in water quality (turbidity). In order to determine the performance of the system, we conducted several tests by placing a sensor and a receiver by two different distances, i.e. the distance of 1 m (short distance) and the actual condition of 35 m (long distance). The results of the system design consist of a wireless monitoring system hardware and data acquisition system software able to display online and in real time. Based on the test results, the value of the total error due to repeatability and linearity for flow rate sensors, water level and turbidity using short-distance wireless systems, are respectively 2.77%, 1.77% and 3.65%. As for the wireless remote system, they are respectively 1.43%, 1.83% and 2.43%. So, the monitoring system of groundwater quality and capacity for infi ltration well using the wireless system can be applied to the actual distance of 35 m, because the error rate due to the infl uence of the distance between the transmitter and the receiver is relatively small, and even better when compared with the short distance ( 1 m).

CREEP LIFE ASSESSMENT OF HIGH PRESSURE FEED WATER HEATER (HPFWH) SHELL AT COAL FIRED POWER PLANT Alam, Hilman Syaeful; Djunaedi, Imam
Teknologi Indonesia Vol 38, No 2 (2015)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v38i2.125

The creep life of high pressure feed water heater shell of coal-fired power plant has been evaluated using the fitness for service (FFS) assessment based on creep rupture life calculation. The purpose of this study is to determine the remaining life of the component due to prolonged exposure to high operating temperatures and loading conditions. The assessment procedures consist of level 1, 2, and 3, the operating time which is evaluated based on the designed life of the components, i.e. 25 years. Based on the assessment results using level 1, total creep damage does not meet the requirements because the operating life is below the 25-year designed life, equal to 219,000 hours. However, based on the results of level 2 assessment, the component successfully achieves the design life with remaining life of 204,042 hours. These results are consistent with the assessment results obtained by level 3, but the remaining life of the component is only 6,806 hours after operated for 25 years.

ANALYTICAL DESIGN METHOD OF 3 KW, 200 RPM PERMANENT MAGNET GENERATOR FOR RENEWABLE ENERGY POWER PLANT APPLICATIONS Irasari, Pudji; Alam, Hilman Syaeful; Kasim, Muhammad
Ketenagalistrikan dan Energi Terbarukan Vol 12, No 1 (2013): KETENAGALISTRIKAN DAN ENERGI TERBARUKAN
Publisher : P3TKEBTKE

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This paper discusses the analytical design method of 3 kW, 200 rpm radial flux permanent magnet generator (PMG) for renewable energy power plant applications. The proposed design method is conducted in two stages, i.e. initiation and validation stages. In the initiation stage, some of the parameters should be specified with values, such as output power, specific magnetic loading, rotation, etc. Results of this stage are detail dimensions of the stator and rotor, which then serve as a reference to recalculate the flux density (entering validation phase). With the new value of specific magnetic loading, all related parameters should also be recalculated, such as the number and diameter of the turns. Furthermore, design is validated by testing the prototype of generator using water resistance load. The test results show that it produces 3043.64 W of power and 253.51 V of voltage at 200 rpm. Compared to the analytical calculation, the power is 0.86% lower and the voltage is 12.45% higher. These results illustrate that the design has been performed properly since the targeted output power can be achieved at the desired speed. Paper ini membahas metoda perancangan analitik generator magnet permanent fluks radial 3 kW, 200 rpm untuk aplikasi pembangkit listrik energi terbarukan. Metoda perancangan yang diusulkan dilakukan dalam dua tahap, yaitu tahap inisiasi dan tahap validasi. Dalam tahap inisiasi, beberapa parameter nilainya harus ditentukan, seperti daya keluaran, specific magnetic loading, putaran, dll. Hasil akhir tahap ini berupa dimensi detil stator dan rotor yang kemudian dijadikan sebagai acuan untuk menghitung kembali specific magnetic loading (memasuki tahap validasi). Dengan nilai specific magnetic loading yang baru, parameter lain yang terkait harus dihitung kembali, seperti jumlah dan diameter lilitan. Selanjutnya, desain divalidasi dengan menguji prototipe generator menggunakan beban tahanan air. Hasil pengujian menunjukkan bahwa generator membangkitkan daya 3043.64 W dan tegangan 253.51 V pada 200 rpm. Jika dibandingan dengan hasil perhitungan, daya eksperimen lebih kecil 0.86% sedangkan tegangannya, lebih besar 12.45%. Hasil tersebut menunjukkan bahwa metoda desain yang diusulkan telah dilakukan dengan teliti karena target daya keluaran dapat dicapai pada putaran yang diinginkan.

Magnetic Simulation and Analysis of Radial Flux Permanent Magnet Generator using Finite Element Method Irasari, Pudji; Alam, Hilman Syaeful; Kasim, Muhammad
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 3, No 1 (2012)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

This paper discusses magnetic simulation and analysis of radial flux permanent magnet generator (PMG) using finite element method (FEM) by utilizing open source software FEMM 4.2. The specification of generator is 25 V, 28 A, 3 phase, 300 rpm. The analyzed magnetic flux was in the air gap, stator teeth and slots to find out the distribusian pattern and its fluctuation. The simulations were conducted in no-load and nominal load (28 A) conditions. Furthermore the maximum flux density of simulation (Bg(sim)) was used to calculate phase voltage Eph to find out the magnitude of generated electromotive force (EMF). The calculation results were presented as voltage vs. rotation graph in no-load condition and voltage vs. current graph in nominal load condition. Both graphs were validated with Eph of experiment result (Eph(exp)) and Eph that the value of Bg obtained from analytical calculation (Eph(calc)). The final results showed that in no-load condition, Eph graph with Bg(sim) (Eph(sim)) was close to Eph(exp) and Eph(calc). The error rate with respect to the experiment was 6,9%. In nominal load condition, Eph(sim) graph almost coincides with Eph(calc.) graph, with the voltage drop of both was 0,441 V. Both graphs however were far different from Eph(exp) graph, which has 9 V of voltage drop. The overall results demonstrated that magnetic distribution pattern presented by FEM was very helpful to avoid magnetic flux accumulation in a particular segment. Besides Bg(sim) facilitated to predict the value of Eph.

Rotor-Dynamic Characteristic Evaluation of Interior Permanent Magnet Motor using Finite Element Method Alam, Hilman Syaeful; Irasari, Pudji
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 5, No 1 (2014)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Dynamic characteristics of a critical speed of the rotor components at interior permanent magnet motor were evaluated using one-dimensional (1D) and three-dimensional (3D) finite element methods. Critical speed of the rotor wasinvestigated in the Campbell diagram, which shows the relationship between natural frequency and rotational velocity of the system when the motor is not in operation. The 1D finite element analysis shows that there are two modes which are close to the design frequency of 300 Hz i.e. mode 1 and 2. However the critical rotational velocity in both modes are still far above the maximum velocity design of 6,000 rpm. Validation using 3D finite element analysis demonstrated that all modes were still above the designed frequency and did not find any critical speed below 6,000 rpm. It can be concluded that the critical speed of the rotor of IPM motor is still outside the system resonance region, and can be operated safely.

Analytical and Numerical Deflection Study on the Structure of 10 kW Low Speed Permanent Magnet Generator Alam, Hilman Syaeful; Irasari, Pudji; Dewi, Dyah Kusuma
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 3, No 2 (2012)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Analytical and numerical studies of the deflection in the structure of 10 kW low speed permanent magnet generator (PMG) have been discussed in this paper. This study is intended to prevent failure of the structure when the prototype is made. Numerical analysis was performed with the finite-element method (FEM). Flux density, weight and temperature of the components are the required input parameters. Deflection observed were the movements of the two main rotor components, namely the rim and shaft, where the maximum deflection allowed at the air gap between rotor and stator should be between 10% to 20% of the air gap clearance or 0.1000 mm to 0.2000 mm. Base on the analysis, total deflection of the analytic calculation was 0.0553 mm, and numerical simulation was 0.0314 mm. Both values were in the acceptable level because it was still below the maximum allowed deflection. These results indicate that the structure of a permanent magnet generator (rim and shaft) can be used safely.

Study on Performance Improvement and Economical Aspect of Gas Turbine Power Plant Using Evaporative Cooling System Alam, Hilman Syaeful; Sasso, John; Djunaedi, Imam
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 6, No 2 (2015)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

The study is intended to improve the performance of gas turbine engines in order to meet both electrical power demand and peak load in the power plant. In this paper, evaporative cooling system had been applied to improve the performance of gas turbine in Pesanggaran power plant in southern Bali Island, Indonesia. Moreover, the economic analysis was conducted to determine the capacity cost, operating cost and payback period due to the investment cost of the system. Based on the evaluation results, the power improvement for the three gas turbine units (GT1, GT2 and GT3) are 2.09%, 1.38%, and 1.28%, respectively. These results were not very significant when compared to the previous studies as well as on the aspects of SFC (Specific Fuel Consumption), heat rate and thermal efficiency. Based on the evaluation of the economic aspects, the reduction of production costs due to the application of evaporative cooling system was not economical, because it could not compensate the investment cost of the system and it resulted a very long payback period. These unsatisfactory results could be caused by the high relative humidity. Therefore, further studies are needed to investigate the other alternative technologies which are more suitable to the climate conditions in Indonesia.

Quality Evaluation of the Modified Diesel-Electric Train (KRDE) Hidayat, Taufik; Alam, Hilman Syaeful
Journal of Mechatronics, Electrical Power and Vehicular Technology Vol 4, No 1 (2013)
Publisher : Research Centre for Electrical Power and Mechatronics, Indonesian Istitutes of Sciences

Quality of the diesel-electric train (KRDE) modified from the electric train (A and B types) which were used in three operating regions in the Indonesian Railway Company has been evaluated by analyzing the cause of the KRDE damages in terms of some aspects including: design, components quality, maintenance (method, finance, human resources), environment and way of operation. Based on the evaluation, it was found that the modification of the both types of KRDE provided a very low reliability and availability due to design and technical problems, as well as unoptimal maintenance. In KRDE type A, damage occurs in the cabling system, compressor, radiator fan system, and the braking system. While in type B, damage occurs in the traction motors, static inverter, and radiator fan. It is predicted that their life span can not reach the design life of 25 years, and even they are expected to be grounded. Many improvement is required to lengten their service life including: repair, modification, human resource competence, facilities, spare parts, maintenance and management.

REYNOLDS NUMBER ESTIMATION OF ROTAMETER BASED ON K-EPSILON MODEL Bahrudin Bahrudin; Hilman Syaeful Alam
Widyariset Vol 3, No 1 (2017): Widyariset
Publisher : Pusbindiklat - LIPI

Measurement of fluid flow with the aid of a floating element (rotameter) is a simple method used to measure the velocity of the fluid with a better degree of accuracy. However, there is still a tendency for turbulence flow around the floating element (annular area) due to narrowing of the flow area and the geometry shape of the floating element that can reduce the level of the rotameter accuracy. Single phase turbulent flow through rotameter was estimated using k-epsilon turbulence model. Detailed study has been performed to investigate the influence of turbulence characteristics from the Reynolds Number ( ) as a benchmark for predicting the level of turbulence. The results showed that at the velocity of 800 l/h the level is arounds 450, which show that the fluid flow on the rotameter categorized as turbulence

Co-Authors A.A. Ketut Agung Cahyawan W Ahmad Aminudin Ari Susandy Sanjaya, Ari Susandy Aris Munandar Arjon Turnip Asep Yusuf Asri Widyasanti Azis Muslim, Azis Bahrudin Bahrudin Chay Asdak Demi Soetraprawata Dyah Kusuma Dewi Fawaiz, Husni Syamil Firmansyah, Dudi FIRMANSYAH, VERA Fuadah, Eza Zahrotul Gianto Gianto Imam Djunaedi, Imam Irwanto, Decky Ari John Sasso, John Karsono, Eko Mimin Muhaemin, Mimin Muhammad Kasim N.P, Sophia Dwiratna Nanda, Muhammad Achirul Nurul Khoiriyah Oktora, Grace Indah Pudji Irasari Pusponegoro, Annisa Rahmawati, Riski Amalia Rian Adi Putra, Rian Adi S. Rosalinda, S. Sarifah Nurjanah Sophia Dwiratna, Sophia Sugiarto, Anto Tri Sutanto, Willi Waras, Nandang Gunawan Tunggal Yasri, Budi ‪Irna Dwi Destiana

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