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All Journal Eksergi: Jurnal Teknik Energi
Purwati W, Wiwik
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Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

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Performance of Magneto Hydro Dynamic (MHD) as a Power Generation Support Tool Purwati W, Wiwik; Atmojo, Slamet Priyo; Margana, Margana; Suwarti, Suwarti; Prasetiyo, Budhi; Khoiroh, Ikhwatinah
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (976.001 KB) | DOI: 10.32497/eksergi.v18i2.3571

Abstract

Magnetohydrodynamics is a method for generating electricity by utilizing the interaction between a magnetic field and an electrolyte fluid. MHD components: salt water electrolyte, Neodymium N52 magnet, and Cu-Zn electrode. The MHD used is a coarse salt water electrolyte. The purpose of the MHD model is as an innovative technological breakthrough that is used to support increasing the efficiency of the power generation system. The lowest efficiency is shown in the second data with variations in salt content of the 5 grams/liter experiment without MHD support, which is 0.08%. The highest efficiency is shown in the twentieth data with variations in salt content of the 95 gram/liter experiment supported by MHD, which is 0.59%. The maximum efficiency increase that can be achieved is 0.37% with variations in salt content of 60 grams/liter.
Savonius Turbine Performance Type ”“ S Variation of Rotor Sweep Diameter and Air Gap Margana, Margana; Sumarno, F Gatot; Purwati W, Wiwik; Suwarti, Suwarti; Fakhri Dzulfikar, Hafidh; Ibrahim, Nandhi Lathief; Wahyuningtyas, Saskia; Widya Larassanti, Sri; Naufal Hanif, Daffa”™
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (738.794 KB) | DOI: 10.32497/eksergi.v18i2.3582

Abstract

The savonius wind turbine with variations in the diameter of the sweep and the air gap is a technological innovation with treatment using changes in the diameter of the sweep and the distance of the air gap between the blades. And it has low self-starting and relatively high torque. The purpose of the study was to create five models and test the performance of the Savonius wind turbine with variations in sweep diameters of 500 mm, 480 mm, 460 mm, 440 mm and 420 mm with air gaps of 30 mm, 50 mm, 70 mm, 90 mm, and 110 mm. . And analyze the turbine performance to get the best Coefficient of Power (CP) from the five turbine gaps. The stages of the research method include the preparation of a literature search, turbine design planning, tool making, tool testing, data collection, data analysis, and the final stage. The results of the tests carried out showed that the Savonius turbine with an air gap of 70 mm with a CP value of 0.232 had maximum work at low wind speeds (4 m/s) and at high wind speeds (10 m/s). obtained a CP value of 0.0695
Co-Authors Atmojo, Slamet Priyo Budhi Prasetiyo F Gatot Sumarno, F Gatot Fakhri Dzulfikar, Hafidh Ibrahim, Nandhi Lathief Khoiroh, Ikhwatinah Margana Margana Naufal Hanif, Daffa”™ Suwarti Suwarti Wahyuningtyas, Saskia Widya Larassanti, Sri