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All Journal Journal of Engineering and Technological Sciences Jurnal Teknologi Terapan International Journal of Marine Engineering Innovation and Research
Bambang Antoko
Politeknik Perkapalan Negeri Surabaya
Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Study of the Evaporation Process in the Spray Zone of a Mechanical Draft Wet Cooling Tower Dany Iman Santoso; Bambang Antoko; Prabowo Prabowo; Djatmiko Ichsani
Journal of Engineering and Technological Sciences Vol. 53 No. 2 (2021)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2021.53.2.4

Abstract

The evaporation process in the nozzle spray system of a cooling tower was the main object of study in order to determine its performance. This process involves liquid water in small size, usually at the droplet level. At this level, parameters that affect the droplet size, such as capacity, air velocity in the chamber, water pressure at the nozzle, atmospheric temperature, etc., influence the process of heat and mass transfer. In this study, capacity and fan rotation were varied to obtain a graph showing the evaporation. Radius, velocity, mass and temperature graphs and rate graphs were obtained from mathematical modeling of the governing equations. From the results it appears that evaporation occurs at a capacity of 6 liter per minute and above, but this requires further proof of the evaporation process along with the height of the tower, which will be the subject of a future study.
ANALISIS PERBANDINGAN PERENCANAAN METODE CPM PROYEK ICCP MENGGUNAKAN VARIASI PELETAKAN GROUNDBED PADA LINE PIPA GAS EKSISTING PERUSAHAAN PUPUK Vitalia Dian Novita; Bambang Antoko; Pekik Mahardhika
Jurnal Teknologi Terapan Vol 5, No 1 (2019): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.699 KB) | DOI: 10.31884/jtt.v5i1.119

Abstract

Perusahaan pupuk di Indonesia didirikan untuk memenuhi kebutuhan pertanian dan pangan nasional. Untuk menunjang pelayanan distribusi maupun proses, sistem perpipaan di dalamnya didesain dengan memperhatikan performanya, termasuk pada proteksi katodiknya. Pada salah satu pabrik di perusahaan pupuk yang diteliti sedang memiliki permasalahan proteksi katodik sehingga membutuhkan pergantian sistem proteksi dari SACP yang sudah ada menjadi ICCP. Mengacu pada penelitian sebelumnya dan berdasarkan kondisi area yang sudah ada, variasi penempatan groundbed dapat dilakukan untuk dianalisa mana yang paling tepat digunakan untuk sistem perpipaan di perusahaan pupuk tersebut. Sebanyak 5 titik lokasi telah dipilih berdasarkan pertimbangan kondisi area sesuai dengan sketsa terlampir. Langkah pertama adalah melakukan perhitungan teknis pada masing-masing variasi, kemudian melakukan perencanaan proyek yang selanjutnya dianalisa keunggulan dari hasil perhitungannya. Dari hasil perhitungan yang telah dilakukan, dapat disimpulkan bahwa sistem ICCP dengan menggunakan 2 groundbed tipe 3 adalah yang paling efektif digunakan untuk sistem perpipaan eksisting pada pabrik yang diteliti karena memiliki keunggulan terbanyak dibandingkan variasi yang lain.
Performance Investigation of the Savonius Wind Turbine by Putting a Rotating Cylinder in the front of Advancing by Varying the Diameter and Stagger Angle Priyo Agus Setiawan; Subagio Soim; Bambang Antoko; Projek P. S. Lukitadi; Emie Santoso; Nopem Ariwiyono; Daisy D. K. R. Antariksih; Ammaisarah Disrinama
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4929

Abstract

The wind energy is the one of the renewable energy to produce the power using turbine. The Savonius turbine have lower performance compared to the other. In this work, the method used is the experimental stu using the wind tunnel to flow air go to the Savonius turbine. The model used is a conventional Savonius wind turbine by adding cylinder installed in front of advancing area with a diameter of 0.4 m and a height of 0.4 m and ds/d of 0.1, 0.2, 0.3, and 0.4 with the rotation of 20 rpm at a stagger angle of 0°, 30°, 60°, and 90°. The experiment is kept constant at the velocity of 7 m/s. This work objective will determine the torque and power coefficient by varying the diameter and stagger angle. The results show that the biggest performance decreased was about 40% in the variation of ds/d of 0.3 with a stagger angle of 0°. The best results show that the wind turbine performance occurred the highest improvement in about 12% at the variation of ds/d = 0.4 with a stagger angle of 60°.
An Experimental Study of Stagger Angle Effect Placed in front of Returning Side toward the Savonius Wind Performance Using Overlap Myring Blade for n = 1 Priyo Agus Setiawan; Projek P. S. Lukitadi; Emie Santoso; Nopem Ariwiyono; Aminatus Sa’diyah; Daisy D. K. R. Antariksih; Galih Anindita; Budi Prasojo; George E. Kusuma; Rini Indarti; Mardi Santoso; Bambang Antoko; Endang P. Purwanti; Mohammad M. Munir
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 2 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i2.6402

Abstract

The previous Savonius wind turbine studies have proved that overlap modifications to conventional blades can improve turbine performance. With these conventional blades, the performance is less optimum because the drag force generated by turbine's rotation is still high. Based on this condition, this experiment is conducted by modifying Savonius wind turbine with overlap blades using Myring equation n = 1. Its blade profile is made half-elliptical to reduce drag force. Diameter and height of the turbine are 400 mm with 0.3 overlap ratio. The ratio of cylinder diameter (ds/D) is 0.4, and the ratio of cylinder center distance (S/d) is 1.7. Experiments are conducted by varying stagger angles of circular cylinder in front of returning blade are 45°, 50°, 55°, and 60° with velocity 5 m/s. The final results show that the best performance improvement of the turbine occurs at 60° stagger angle. The increase in torque coefficient is 4.95% and power coefficient is 20.16% to overlap Savonius wind turbine with myring n = 1 with no circular cylinder.
Co-Authors Alvido Toto Wijaya Aminatus Sa’diyah Ammaisarah Disrinama Budi Prasojo Daisy D. K. R. Antariksih Dany Iman Santoso Djatmiko Ichsani Endang P. Purwanti Galih Anindita George E. Kusuma Mardi Santoso Mohammad M. Munir Nopem Ariwiyono, Bachtiar Nora Amelia Novitrie Pekik Mahardhika Prabowo Prabowo Priyo Agus Setiawan Projek P. S. Lukitadi Rini Indarti Santoso, Emie Subagio Soim Vitalia Dian Novita