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All Journal Jurnal Sains dan Teknologi Jurnal Techno Bahari Sewagati Jurnal Cakrawala Maritim Proceedings Conference on Marine Engineering and its Application
Burniadi Moballa
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Metode Smoothed Particle Hydrodynamicsuntuk Aliran Laminar Tak Kompresibel Dengan Masukan Dan Keluaran Di Saluran Terbuka Burniadi Moballa
Techno Bahari Vol 4 No 2 (2017)
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Smoothed Particle Hydrodynamics (SPH) is a meshfree and Lagrangian numerical method. SPH is especially suitable for simulation of free surface flow problems. When used to simulate an incompressible fluid, SPH employs a weakly compressbile model (WCSPH). In the weakly compressible SPH (WCSPH), the density of the fluid is allowed to vary slightly and the pressure is obtained by employing an equation of state. However, the application of SPH to the fluid-solid interaction problem close to a free surface is relatively few. There are two main problems that stand in the way. First, the pressure field predicted by the WCSPH model is plagued by numerical noise. Second, there is no established scheme to implement inlet and outlet boundaries. Basically, inlet and outlet are Eulerian boundaries. Therefore, a treatment for the particles that move beyond the outlet and a method for supplying particles at the inlet are required. Hence, this work attempts to address these problems by developing methods to predict the pressure field with sufficient accuracy and to implement inlet and outlet boundaries. We developed an incompressible SPH (ISPH) method based on the iterative correction method to obtain more accurate pressure field. We adopted the velocity interpolation method proposed by Rhie and Chow to the current ISPH method to treat the pressure checkerboarding problem. Inlet and outlet boundaries are implemented by dragging the particles that moved beyond the outlet back to the inlet. The developed ISPH methodis applied to study flow past circular cylinder between parallel walls andflow past circular cylinder beneath a free surface.
RANCANG BANGUN DAN PELATIHAN PANEL HUBUNG GENERATOR MIKROHIDRO PADA PONDOK PESANTREN TARBIYATUL QURAN, DESA TORONGREJO, KOTA BATU Ryan Yudha Adhitya; George Endri Kusuma; Sryang Tera Sarena; Burniadi Moballa; Danis Maulana
Jurnal Cakrawala Maritim Vol 1 No 2 (2018): Jurnal Cakrawala Maritim
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M) - PPNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cakrawalamaritim.v1i2.898

Abstract

Rancang Bangun
Desain dan Eksperimen Variasi Bukaan Damper Fresh Air dan Return Air terhadap Kinerja Mesin Pendingin pada Sistem AHU Kusuma, George Endri; Pramesti, Lely; Purwana, Agung; Karamina, Ponti Almas; Moballa, Burniadi; Arrosyid, Alwi; Dahlan, Robi; Asrori, Asrori
Jurnal Sains dan Teknologi Vol. 6 No. 3 (2024): Jurnal Sains dan Teknologi
Publisher : CV. Utility Project Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55338/saintek.v6i3.4301

Abstract

Sistem Air Handling Unit (AHU) yang tidak optimal, khususnya pada kapal, dapat menimbulkan berbagai masalah seperti efisiensi energi rendah, distribusi udara yang tidak merata, serta peningkatan kerugian panas. Hal ini terjadi pada sistem AHU kapal Ambulance yang menggunakan 100% fresh air. Penelitian ini bertujuan mengoptimalkan kinerja AHU dengan menganalisis Coefficient of Performance (COP), Energy Efficiency Ratio (EER), dan distribusi aliran udara menggunakan variasi bukaan damper fresh air dan return air serta kecepatan kipas. Pendekatan eksperimental dilakukan dengan mendesain ulang sistem AHU menggunakan square ducting dan menambahkan damper untuk mengatur bukaan fresh air dan return air. AHU yang digunakan memiliki kapasitas pendinginan 17.700 BTU/hr dan COP standar 2,52. Hasil penelitian menunjukkan konfigurasi optimal pada kecepatan kipas tinggi dengan bukaan damper 50% fresh air dan 50% return air, menghasilkan COP 4,063 dan EER 9,77 BTU/hr*W. Distribusi udara yang merata pada diffuser tercapai pada konfigurasi yang sama, meningkatkan efisiensi sirkulasi udara. Selain itu, konfigurasi damper dengan 75% fresh air dan 25% return air memberikan kerugian panas terendah, meskipun tidak berpengaruh besar pada COP. Kesimpulannya, redesain damper dan ducting ini meningkatkan efisiensi energi, kinerja pendinginan, dan mengurangi kerugian panas pada sistem AHU kapal.
EVALUASI SALURAN ISAP DEBU UNTUK SISTEM DUST COLLECTOR Destyandra Hermanu Ariandi; Endri Kusuma George; Moballa Burniadi
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.702

Abstract

In the process of loading and unloading low calorie coal / LRC (Low Range Calorie) there is often pollution of coal dust and self combustion. This is because of the character of LRC coal is easily destroyed, the dust is very light and easy to burn. To prevent the occurrence of fire hazard, it is attempted to break one of the danger chain by optimizing the dust collector. Therefore, the capability of suction dust collector should be increased so that the impact of dust can be reduced. The simulation shows that the dust inside the conveyor can not be inhaled because the velocity of the inlet conveyor is 2.9 m/s. While the suction collector force of 1.5 m/s causes the dust collector not to capture the dust completely. Therefore it is necessary to increase the velocity of the suction channel on the dust collector, by varying with ratios 3 and 4. Between the two variations the best suction is the ratio 3 with the suction rate of 9 m/s. Furthermore, there is a change in suction hood angle with angle variation of 14 degree, 17 degree, 20 degree to get mass concentration. All angle variation within suction speed 12 m/s. The simulation result with an angle of 14 degrees obtained mass concentration of 14940,23 mg/m,3 with an angle of 17 degrees of 3,05 mg/m3, and with an angle of 20 degrees of 0,000741 mg/m3. Of the three variations, the mass concentration obtained at the outlet is at least 20 degrees suction hood angle.
Evaluasi Numerik Kinerja Condenser PLTU Unit 8 di PT. POMI Paiton Suantara Darma Gede; Agus Setiawan Priyo; Moballa Burniadi
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.708

Abstract

Condenser modeling to determine the performance of industrial condensers on a steampower-based energy generator. The effectiveness of condenser is very important, so the condenserperformance needs to be maintained. The efficiency of condenser work directly affects theperformance of turbine steam, which is an energy generator in the system. The saturation pressurein the industrial condenser before to the plugging process has the highest value of 27790.0 (Pa). Themaximum condensation rate value in the industrial condenser before the plugging process is0.00529579 (Kg/m3.s). The saturation temperature in the industrial condenser after the pluggingprocess has the highest value of 300.0 (oK). The maximum condensation rate value in the industrialcondenser after the pluging process is 0.00519625 (Kg/m3.s).
Kajian Numerik Infiltrasi Flue Gas pada Komponen Lance Tube Soot Blower Tipe PS-SL Haidar Ali Yafie M; Shah Muhammad; Moballa Burniadi
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.711

Abstract

One failure that often occurs in the sootblower is that it breaks in the lance tube caused by corrosion. Based on the results of the root analysis the failure of the cause of corrosion in the component lance tube is caused by the occurrence of flue gas infiltration which results in blockage of the vent valve. This causes the remaining blowing medium cannot be pushed into the furnace and if left for too long will cause condensation in the lance tube. Condensation mixed with corrosive substances from flue gas can accelerate the corrosion rate on the lance tube. The simulation was carried out using the CFD (Computational Fluid Dynamics) method assisted by Fluent ANSYS 17.2 software. Corrosive substances in flue gas are modeled as inert particles of fly ash using DPM (Discrete Phase Model). To overcome the infiltration problem, angular variations were made in the converging section of the under-expanded nozzle on the lance tube. The concentration of DPM particles is compared to the cross section to find out how many corrosive particles enter the soot blower. Particle concentrations at angles of 10º 15º and 20º are 2,043 kg/m³, 0.515 kg/m³, 0475 kg/m³, respectively. While the mass fraction is 0.0069, 0.0017, 0.0016, respectively. The simulation results show a reduction in infiltration with the addition of an angle to the nozzle, with an angle of 20º showing the best results.
KAJIAN NUMERIK BACK FLOW CAMPURAN BATUBARA–AIR PERPIPAAN BA-300 PADA PYRITES HOPPER SYSTEM DI PLTU UNIT 8 PT. POMI PAITON Khairuddin Khairuddin; Priyonggo SL Projek; Moballa Burniadi
Proceedings Conference on Marine Engineering and its Application Vol 1 No 1 (2018): Conference on Marine Engineering and its Application
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v1i1.815

Abstract

Pulverizer is one of the most important equipment in PLITU PAITON Unit 8, the pulverizer has supporting equipment, one of which is the pyrites hopper system. The functions pyrites hopper is to accommodate coal reject from pulverizer which will be directed towards SSCC using a jet pump. The occurrence of backflow causes damage to the pulverizer on the floor plate. Thermal stress occurs because the backflow of the BA-300 piping flow that enters the pulverizer floor plate temperature drops. This research discusses the backflow causes that occur in the BA-300 pipeline and alternative solutions. This research phase starts from the identification of backflow problems, data collection and literature study regarding backflow on the swing check valve, as well as CFD (Comptational Fluid Dynamics), modeling of existing BA-300 piping system, search and evaluation of alternative solutions. From the simulation results, the coal particles are sandwiched between the disc and casing check valve because the coal particles settle at the bottom of the check valve, which is caused by the amount of flow rate of coal 2.6 kg / s. Of the 6 variations made, the reduction in flow rate with the amount of 1.7 kg / s was not found again pinched coal even though there was still a bit of coal sequestration.Keyword : Backflow, CFD, Swing check valve model.
Pengaruh Penambahan Becker Mewis Duct pada Perfoma Propeller B-series Husnun Aska Nabilah; Burniadi Moballa; Benedicta Dian Alfanda
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2628

Abstract

Pollution due to sea transportation is a problem that requires consistent handling. Recent years of research in the field of shipping have focused on reducing exhaust emissions by increasing fuel efficiency and decarbonization. Decarbonization in the shipping industry can be achieved by using energy saving devices to reduce fuel consumption. The Energy Saving Device commonly used in the shipping world is the Becker-Mewis duct (BMD). This study used a variation of the NACA profile on the Becker-Mewis duct fin. The CFD (Computational Fluid Dynamics) method is used to analyze the thrust coefficient and torque coefficient. Becker-Mewis duct was added to increase thrust and torque values. From the results of the analysis that has been carried out without variations from NACA, the thrust coefficient is 0.1526, the torque coefficient is 0.0162 and the efficiency is 0.5261. With the NACA 4412 variation, it has a thrust coefficient of 0.2579, a torque coefficient of 0.0252 and an efficiency of 0.5728. The NACA 4415 variation has a thrust coefficient of 0.2663, a torque coefficient of 0.0260 and an efficiency of 0.5743. With increased efficiency, the addition of Becker-Mewis duct can increase the performance of the propeller
Kajian Numerik Penerapan Organic Rankine Cycle sebagai Metode Energi Take-Off dari Penyimpanan Energi Termal Skala Jala-Jala Dwiyan Bagus Prayoga; Burniadi Moballa; Pranowo Sidi
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2629

Abstract

Energy is a need that must be met in human life, if the population increases, the need for energywill also increase. A technology is needed to support human energy needs. Therefore, low temperature heatutilization is carried out using the Organic Rankine Cycle as an energy take off from a grid-scale thermalenergy storage in the form of sand media where the heat stored is heat wasted from the heat pump. After theprocess simulation is carried out, the best and feasible fluid to run the system from an ammonia heat pumpis N-Pentane with an efficiency of 7.074%. The storage medium is silica sand. The heat exchanger design onthe tube has an outer diameter of 60.3 mm for the ORC and 42.2 mm for the heat pump with an inner diameterof 54.8 mm for the ORC tube and 32.5 mm for the heat pump. The length of the heat exchanger design pipeis 165,57 m for the ORC and 479,23 m for the heat pump.
Kajian Numerik Penerapan Heat Pump sebagai Sarana Penyimpanan Energi Skala Jala-Jala dari Pembangkit Energi Terbarukan Refi Afrilia; Eko Julianto; Burniadi Moballa
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2631

Abstract

Utilization of New Renewable Energy (EBT) today must be carried out because of its abundantpotential. One of the uses is to use energy storage with a heat pump system sourced from EBT. To supportthis, it is necessary to use a heat exchanger in an energy storage system which is expected to make theheating or cooling system faster with the right refrigerant. Therefore, a study was carried out using theapplication of a heat pump system with the addition of a heat exchanger as a place to store energyoriginating from Renewable Energy. The method used is process simulation using DWSIM. The refrigerantused is R-600a, R-407C. R-410a, R-22, and ammonia. Ammonia was chosen because it produces aCoefficient of Performance of 3.012 with a condenser outlet temperature of 102.854°C. The storagemedium used is silica sand.
Co-Authors Agung Purwana Agung Purwana Arrosyid, Alwi Asrori Asrori Azzah Dyah Pramata, Azzah Dyah Benedicta Dian Alfanda Dahlan, Robi Daisy Dwijati Kumala Ratna Danis Maulana Destyandra Hermanu Ariandi Diah Susanti Dwiyan Bagus Prayoga Eko Julianto Fajarin, Rindang Haidar Ali Yafie M Haniffudin Nurdiansah Hariyati Purwaningsih Husnun Aska Nabilah Kamilah, Imada Millatul Khairuddin Khairuddin Kusuma, George Endri Muchammad Fajar Muttafaq Muh Anis Mustaghfirin Muhamad Agus Prasetyo M Muhamad Andika Prasetyo Muhammad Rafli Syahrizal R Piero Wahyu Iskandar Ponti Almas Karamina Pramesti, Lely Pranowo Sidi Priyo Agus Setiawan Priyonggo SL Projek Rakhmawati, Yeny Widya Refi Afrilia Ryan Yudha Adhitya Shah Muhammad Sryang Tera Sarena Suantara Darma Gede