Putu Brahmanda Sudarsana
Universitas Udayana

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Analisa karakteristik aliran pada fenomena sirkulasi alam fasa-tunggal di Untai FASSIP-01 Mod.2 Nathaniel Ezer Putra Darmawan; G.B. Heru K; Dedy Haryanto; Giarno .; I Nyoman Suprapta Winaya; I Ketut Gede Sugita; Putu Brahmanda Sudarsana; Mulya Juarsa
Jurnal Energi Dan Manufaktur Vol 14 No 2 (2021)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jJEM.2021.v14.i02.p04

Abstract

FASSIP-01 rectangular loop is a facility which owned by PTKRN-BATAN that used for observe the phenomenon of natural circulation in large-scale. This natural circulation phenomenon will be applied as a passive cooling system in nuclear power plant that will be built up in Indonesia. Some FASSIP-01 experiments have done before, but those experiments show that the fluid flow in FASSIP-01 is not in optimal conditions because there are some errors happened and causes some losses. The second modification of FASSIP-01 rectangular loop has purpose to minimize losses happened in previous modification of FASSIP-01. The purpose of this research is to know the characteristics of flow and the trend of the data from the flow in FASSIP-01 mod.2 rectangular loop before do experiments. Simulations is done by using 2-dimensional images and varying the heating temperature at 353,15 K and 363,15 K and the cooler at temperatures of 278.15 K, 283.15 K, 288.15 K and 293.15 K. Based on the simulation results it is known that the velocity flow rate will increase if the temperature in the heating tank is increased, but will decrease if the temperature in the cooling tank is increased. The results of the calculation of the Reynold Number and Nusselt Number based on the velocity flow rate are 2973,668 the lowest and 5775,356 the highest and for the Nusselt number obtained 17,36 and the highest is 28,091.
Rancang bangun sistem penangkap sampah Daerah Aliran Sungai (DAS) berbasis integrasi screw conveyor dan sistem pemantauan menggunakan Internet of Things (IoT) Putu Brahmanda Sudarsana; I Made Putra Arya Winata; I D. G. Ary Subagia
Jurnal Energi Dan Manufaktur Vol 14 No 1 (2021)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEM.2021.v14.i01.p01

Abstract

Waste material flowing in rivers creates several problems in various aspects, especially in environmental aspects. One of the waste-capturing mechanisms which is widely applied is the trash rack. However, studies show that trash racks have the potential to block river flow which increases the risk of flooding. This study proposes a screw conveyor-based waste capturing mechanism with a modification of the blade’s design resembling a trash rack and integrated with monitoring system using the internet of things. The research was conducted through three methods of virtual prototyping, the CAD (Computer-Aided Design) design method through calculation of machine elements and 3-dimensional design process using Autodesk Inventor Professional 2018 software, the design analysis method which includes computational fluid dynamics analysis and three-dimensional stress analysis using ANSYS software, as well as methods for designing and testing monitoring systems using the open-source NodeMCU board and Google Firebase real-time database. The result obtained from this research are the design and specifications of screw conveyor components, v-belt transmission systems, ball contact bearings, and electric motors with a waste-capturing capacity of 0.368 m3/s. The results of the design validation show that the velocity of water flowing through the design geometry is not significantly reduced and the design is able to withstand a combination of self-load and pressure loads due to water flow. The monitoring website has been able to display real-time sensor-acquired data.