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Komparasi Simulasi CFD Pada Turbin Cross-Flow Dengan Model Turbulen k-ε STD dan RNG k-ε Juan Setiawan; Steven Darmawan; Harto Tanujaya
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 4 Nomor 2 Tahun 2022
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v4i1.3100

Abstract

The cross-flow turbine is one of widely used impulse turbine in power generator system due to it’s simple design and ability to be applied to a wide range of head and flow conditions. The flow in a cross-flow turbine flows in a crossed manner and works in 2 stages which could affect the turbine’s performance. Hence the visualization of these flow behavior could indicate the performance. Complexity of the flow inside the runner require the usage of CFD Method to visualize the flow, leaving the gap since numerical model also rely on turbulence model. The purpose of this study is to analyze the flow pattern in the nozzle and runner on a cross-flow turbine using the RNG k-ε turbulence model in ANSYS 2021 R2 Academic Version software. The simulation was carried out with 5 variations of nozzle inlet velocity: 2 m/s, 3 m/s, 4 m/s, 5 m/s and 6.487 m/s. The working fluid is assumed to be 1 phased water, with nozzle inlet pressure of 1.05 Pa, temperature of 24.85 oC and RNG k- ε turbulence model which compared to STD k-e turbulence model from the previous study. The results show that the simulation with the RNG k-ε turbulent models resulted in differences in the velocity and pressure profiles of Stage 1 of 3.353% and 87.679% and Stage 2 of 13.653% and 21.826% compared to simulation with k-ε STD models.
ANALISIS SISTEM OTOMASI KONVEYOR PADA MESIN COOLANT FILTRATION DI PT. MATAHARI MEGAH Juan Setiawan; Agus Halim; Kevin Raynaldo; Ronald Ogi Pratama
POROS Vol. 18 No. 2 (2022): Jurnal Ilmiah Teknik Mesin POROS
Publisher : Program Studi Teknik Mesin Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/poros.v18i2.26772

Abstract

Coolant Filtration Machine is one of the products of PT. Matahari Megah. The purpose of this machine is to recycle residual coolant fluid that has been used in the machining process. Coolant Filtration Machine is working through automation system which involves conveyor system controlled by sensors. The components involved need to be analyzed and calculated properly to work as designed. Hence, calculation for required electricity power to move the wire mesh conveyor used in this machine was done. According to the process, it was concluded that the required power is 60 Watt. A pair of sensors are mounted to control the movement of this conveyor are proximity sensors which monitor the water container and lever limit switch monitoring the paper holder system.