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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.
Studi Pengaruh Variasi Resin terhadap Laju Korosi pada Material FRP Nora Amelia Novitrie; Alvido Toto Wijaya; Bambang Antoko
Journal of Research and Technology Vol. 6 No. 2 (2020): JRT Volume 6 No 2 Des 2020
Publisher : 2477 - 6165

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Abstract

Pipes in the oil and gas industry use carbon steel which contains a corrosive fluid with fluctuating acidity. This condition causes the corrosion resistance of the pipe to decrease so that other materials that are more resistant to corrosive conditions are needed, for example Fiberglass Reinforced Plastic (FRP). FRP is a composite material made of resin which is then formed into pipes. In this study, trials were carried out on polyester resin, silicon rubber resin and epoxy resin to determine the value of their corrosion rate. The level of resistance of a material to corrosion generally has a corrosion rate value between 0.025 - 5.08 mmpy. The method used is the immersion test of the specimen using the ASTM G31 - 72 standard.The results obtained from this experiment are that polyester has the lowest corrosion rate than epoxy and silicon rubber and polyester resin with a fiber composition of 40% and fiber position 40° has a corrosion rate of 0.566 mmpy so that it meets the level of resistance of a material to corrosion.  
KARAKTERIK GETARAN PONDASI MESIN INDUK OFFSHORE SUPPLY VESSEL 907 GT PADA KONDISI OPERASI Heroe Poernomo; Adi Wirawan Husodo; Subagio Soim; Bambang Antoko; Nopem Ariwiyono; Rizaldi Taufik Alhakim
Techno Bahari Vol 10 No 1 (2023)
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v10i1.227

Abstract

In this research, an analysis has been carried out to determine the vibration characteristics that occur on the main engine foundation of the 907 GT offshore supply ship under operating conditions. Numerical methods based on mathematical modelling of machine foundation construction are used as a reference for analysing the possibility of resonance, displacement response and velocity response. Mathematical modelling is developed by taking into account the weight and power of the main engine, the dimensions and configuration of the main engine foundation, and the damping coefficient. Mathematical modelling is realized in the form of a 2nd order differential equation (ODE). From the results of the analysis performed, it shows that resonance generally does not occur. This is because the value of the natural frequency of the main engine foundation is different from the value of the engine excitation frequency. However, more attention must be paid when the ship operates at engine speed between 1760 RPM to 1980 RPM. This is because the value of the main engine excitation frequency is close to the natural frequency of the foundation construction. The greater the rotation of the main engine, the magnitude of the displacement response is also greater. The velocity response value that occurs still meets the conditions specified by the American Bureau of Shipping (ABS). Mathematical modelling that has been prepared can describe clearly the vibration characteristics of the main engine foundation.
Co-Authors Adi Wirawan Husodo Alvido Toto Wijaya Dany Iman Santoso Djatmiko Ichsani Heroe Poernomo Nopem Ariwiyono, Bachtiar Nora Amelia Novitrie Pekik Mahardhika Prabowo Prabowo Rizaldi Taufik Alhakim Subagio Soim Vitalia Dian Novita