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All Journal Eksergi: Jurnal Teknik Energi
F Gatot Sumarno
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Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

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Solar Cell Performance Test against Load Variations F Gatot Sumarno; Wahyono Wahyono; Baktiyar Mei Hermawan; Ahmad Hamim Su’udy; Nur Fatowil Aulia; Ikhwatinah Khoiroh; Mochammad Denny Surindra
Eksergi Vol 18, No 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.172 KB) | DOI: 10.32497/eksergi.v18i2.3570

Abstract

Solar cell is a converter of light energy into electrical energy. This study aims to examine the characteristics of the solar cell to load variations. The research was conducted at the Semarang State Polytechnic Energy Conversion Lab. The solar cell used in the research of the monocrystalline solar cell type KTENG CP-520S. The research method is carried out by measuring the value of solar intensity, voltage and electric current from the solar cell, then calculating the value of the power and efficiency of the solar cell. The greater the intensity of sunlight, the better the characteristics of the solar cell with a note that the solar cell surface temperature must be stable at 250C. The results showed that the highest input power of the solar cell was 5293.69 watts at a lamp load of 115 watts at 833.6 W/m2 of radiation during sunny weather. The highest value of the output power of the solar cell is 191.52 watts when the lamp is loaded with 190 watts of radiation at 739.4 W/m2 during sunny weather. While the highest value of the load output power is 212.43 watts when the lamp is loaded with 200 watts of radiation at 724.4 W/m2 when the weather is sunny. The highest efficiency of the solar cell is 4.13% when the lamp is loaded with 200 watts of radiation at 724.4 W/m2 when the weather is sunny. And the highest value of Solar Power Plant efficiency is 4.61% at a 200 watt lamp loading at 724.4 W/m2 radiation when the weather is sunny.
Savonius Turbine Performance Type – S Variation of Rotor Sweep Diameter and Air Gap Margana Margana; F Gatot Sumarno; Wiwik Purwati W; Suwarti Suwarti; Hafidh Fakhri Dzulfikar; Nandhi Lathief Ibrahim; Saskia Wahyuningtyas; Sri Widya Larassanti; Daffa’ Naufal Hanif
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 Ahmad Hamim Su’udy BAKTIYAR MEI HERMAWAN Daffa’ Naufal Hanif Hafidh Fakhri Dzulfikar Ikhwatinah Khoiroh Margana Margana Mochammad Denny Surindra Nandhi Lathief Ibrahim Nur Fatowil Aulia Saskia Wahyuningtyas Sri Widya Larassanti Suwarti Suwarti Wahyono Wahyono Wiwik Purwati W