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All Journal JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Prosiding SNAST
Achmad Bahrul Ulum
Politeknik Elektronika Negeri Surabaya
Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Studi Numerik Centrifugal Fan Tipe Impeller Backward dengan Variasi Putaran Fan Lohdy Diana; Achmad Setiyawan; Achmad Bahrul Ulum; Arrad Ghani Safitra; Muhammad Nabiel Ariansyah
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol 5, No 2 (2021): EDISI DESEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v5i2.5181

Abstract

The primary air fan functions as a primary air producer which is used as air to transport coal powder from the pulverizer to the burner to be burned in the boiler furnace. This study aims to obtain the effect of the rotation variation of fan to  fluid flow characteristics such as the distribution of total pressure, the dynamic pressure, the pressure static contours, velocity distribution, and the fan optimal efficiency. This study was numerical study with simulated a backward impeller type centrifugal fan in a two-dimension model using Fluid Computational software with the multiple reference frame method with the variation of fan rotation. Based on the visualization of the pressure contour and velocity distribution, it could be concluded that there was a volute phenomenon, this was indicated that the greater the volume area in the volute is the greater the total pressure value too. Based on the visualization of the outlet velocity distribution at the position of -0,8531m to -1,01301m, it was found that the velocity is close to the value of 0 m/s2. It showed that the minimum velocity in the area due to the volute tongue radius occurs a flow collision and it impacted the velocity in the area decreased up to V=0. From the simulation results, it was found that the greater the fan rotation value was the greater the efficiency value too. It would be verified by the actual operating data of the centrifugal fan with a minimum rotation range value of 1194 rpm to a maximum of 1468 rpm
STUDI EKSPERIMEN PENGARUH JUMLAH PIPA SALURAN TERHADAP PERFORMA TURBIN FRANCIS Afif Nur Ayu Shadrina; Joke Pratilastiarso; Achmad Bahrul Ulum
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

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Abstract

The large population growth requires Indonesia to continue to build new power plants by utilizing the diversity of energy resources in Indonesia. PLTA is an integrated power system in a dam by utilizing the mechanical energy of the water flow to rotate the turbine. The francis turbine is one of the important components of hydropower that serves to convert or convert the potential energy form that water possesses into mechanical energy. Water flowing from the pipeline from a certain height can convert to pressure energy before entering the guide vane and some of the pressure energy is converted into kinetic energy as it passes through the guide vane. Some of that energy will drive the shaft or runner. The pipeline that serves to direct the flow before entering the spiral case can be varied by the number of single pipes up to three pipelines. The francis turbine is designed in a laboratory scale with a runner dimension of 30 cm and the number of 10 blades has a pipe dimension of 8.9 cm. The test results show that the trendline when using 2 pipelines is better than the other pipeline variation with the highest efficiency value of 6.2%.francis turbine
Co-Authors Achmad Setiyawan Afif Nur Ayu Shadrina Arrad Ghani Safitra Eka Siti Nurlaili Hendrik Elvian Gayuh Prasetya Joke Pratilastiarso Lohdy Diana Muhammad Nabiel Ariansyah Rif’ah Amalia