Analisa Numerik Pengaruh Variasi Design Method Sudu Impeller terhadap Performa Pompa Sentrifugal Semi-Open Impeller

Cahaya, Veresa Eka Cahaya (2025) Analisa Numerik Pengaruh Variasi Design Method Sudu Impeller terhadap Performa Pompa Sentrifugal Semi-Open Impeller. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pompa sentrifugal memiliki peran penting dalam industri gula, khususnya untuk mengalirkan fluida kental seperti molase, yang memiliki viskositas tinggi sebesar 1.150 kg/m³ atau 54 centipoise. Dengan produksi gula nasional yang mencapai 2,46 juta ton pada 2024, meningkat 10% dibanding tahun sebelumnya, kebutuhan akan pompa yang andal dan efisien semakin signifikan. Performanya sangat dipengaruhi oleh desain impeller, terutama semi-open impeller yang dirancang untuk mengurangi hambatan aliran pada fluida viskos. Salah satu aspek dalam desain impeller adalah metode pelukisan sudu / design method, seperti Point by Point, Circular Arc, Single Arc, dan Double Arc, yang berdampak langsung pada parameter performa seperti head, kapasitas, daya, dan efisiensi. Penelitian ini menggunakan simulasi Computational Fluid Dynamics (CFD) untuk menganalisis dampak masing-masing design method sudu impeller terhadap performa pompa saat menangani fluida dengan viskositas tinggi yaitu molase dengan menggunakan rpm konstan pada setiap simulasi, viskositas 54cps serta massa jenis 1.150 kg/ m³ dengan rpm konstasn 2900rpm. Hasil penelitian menujukan bahwa performa efisiensi terbaik diperoleh pada desain Point by Point dengan efisiensi sebesar 39,7% dan head 11,89m dikapasitas fully open 74,5lpm, sedangkan desain Single ARC lebih unggul dalam menghasilkan head tinggi sebesar 12,54m pada kapasitas fully open 74,5lpm dengan efisiensi lebih rendah sebesar 37,29%.
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Centrifugal pumps play an important role in the sugar industry, particularly for pumping viscous fluids such as molasses, which has a high viscosity of 1,150 kg/m³ or 54 centipoises. With national sugar production reaching 2.46 million tons in 2024, an increase of 10% over the previous year, the need for reliable and efficient pumps is becoming increasingly significant. Their performance is greatly influenced by impeller design, particularly semi-open impellers designed to reduce flow resistance in viscous fluids. One aspect of impeller design is the blade design method, such as Point by Point, Circular Arc, Single Arc, and Double Arc, which directly impacts performance parameters like head, capacity, power, and efficiency. This study uses Computational Fluid Dynamics (CFD) simulation to analyze the impact of each impeller blade design method on pump performance when handling high-viscosity fluids, specifically molasses, using a constant RPM in each simulation, with a viscosity of 54 cps and a density of 1,150 kg/m³ at a constant RPM of 2,900 RPM. The results indicate that the best efficiency performance is achieved with the Point-by-Point design, yielding an efficiency of 39.7% and a head of 11.89 m at a fully open capacity of 74.5 lpm. Meanwhile, the Single ARC design outperforms the Point-by-Point design in generating a higher head of 12.54 m at a fully open capacity of 74.5 lpm, albeit with a lower efficiency of 37.29%.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Pompa Sentrifugal, Semi-Open Impeller, Design Method, CFD, Performa Pompa
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA357 Computational fluid dynamics. Fluid Mechanics T Technology > TJ Mechanical engineering and machinery > TJ903 Pumping machinery. T Technology > TJ Mechanical engineering and machinery > TJ919 Centrifugal pumps--Design and construction.
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Veresa Eka Cahaya
Date Deposited:	30 Jul 2025 08:47
Last Modified:	30 Jul 2025 08:47
URI:	http://repository.its.ac.id/id/eprint/124146

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