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Hotdian Sinambela, Hotdian
Universitas of Indonesia
Education Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Analysis of Deflector Variations to Improve Performance and Determine the Force of the Darrieus Turbine Using CFD Software Susanto, Edy; Arie Hadiansyah, Muhammad; Sinambela, Hotdian; Erwin, Erwin
DINAMIS Vol. 13 No. 1 (2025): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v13i1.18833

Abstract

This research focuses on developing deflectors to improve the performance of Darrieus turbines, a type of vertical wind turbine known for its efficiency in the conversion of wind energy into mechanical energy. The main objective of this research is to test different deflector shapes to optimize the airflow entering the turbine blades and improve the efficiency and power output of the turbine. In this study, various deflector designs including semicircular, triangular, rectangular, hexagonal, and pentagonal shapes were examined to determine their effectiveness in directing and accelerating airflow to the turbine blades. The research method involved aerodynamic simulations using CFD software. The results showed that the semicircular-shaped deflector provided significant performance improvement compared to the other shapes. These deflectors successfully reduced turbulence and drag, and accelerated the airflow entering the turbine blades, thereby increasing the overall power output of the Darrieus turbine. In addition, the analysis shows that at 17.5, 10.5, and 8.5 m/s calculations, at 8.5 m/s wind speed calculation, the air speed can reach 30.1% with a force of 7.30344 N, and 10.5 m/s speed can reach 24.33% with a force of 11.361 N, and 17.8 m/s wind speed can reach 20.67% with 25.638 N force.
Analysis of the Effect of Blade Washing Compressor on Compressor Efficiency and Thermal Efficiency of Gas Turbine at PLTG XXX Susanto, Edy; Sinambela, Hotdian; Tri Khairullah, Rafi
DINAMIS Vol. 13 No. 1 (2025): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v13i1.18846

Abstract

The most important parts of a gas power system are the compressor and gas turbine. Compressor performance will naturally decrease due to high ambient temperatures and dirt in the incoming air and make the compressor inefficient. To restore compressor efficiency, it is recommended to clean the compressor using the compressor blade washing method. The purpose of this study was to determine the compressor blade washing procedure used in the PLTG system and determine the parameters tested and analyses their effect on the thermal efficiency of the PLTG. This study was conducted on a PLTG unit operating at a load of 120 MW or 50% of the installed capacity, with research stages including data collection, calculation of the gas turbine heat rate, calculation of the thermal efficiency of the PLTG cycle and calculation of compressor efficiency. From the implementation of the compressor blade washing carried out, there was an increase in compressor efficiency of 2.62% and after the compressor blade washing caused a decrease in the heat rate of 853 kJ / kWh, so that there was an increase in the thermal efficiency of the PLTG of 1.74%.
Co-Authors Arie Hadiansyah, Muhammad edy susanto Erwin Erwin Nasruddin Nasruddin Tri Khairullah, Rafi