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All Journal R.E.M (Rekyasa Energi Manufaktur) Jurnal Pendas : Jurnah Ilmiah Pendidikan Dasar
Fadhilla, Putri
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Engineering Other

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Thermodynamic Analysis of Hydrogen Production from Hydrogen Sulfide in Geothermal Power Plant by using Fe-Cl Hybrid Indirect Electrolysis Fadhilla, Putri; Udi Harmoko; Marcelinus Christwardana
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 8 No 2 (2023): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v8i2.1679

Abstract

Clean and sustainable energy sources are needed to meet global energy demand. Geothermal Power Plants (GPPs) may generate power from Earth's heat. However, GPPs release hazardous hydrogen sulfide (H2S) gas. To overcome this problem and maximize on resource potential, researchers have investigated converting GPP-emitted H2S into hydrogen (H2). The Fe-Cl hybrid indirect electrolysis technique is used to analyze the thermodynamics of hydrogen synthesis from H2S in GPPs. Electrolysis electricity, hydrogen generation rate, and electrolyzer energy and exergy efficiency are examined in the thermodynamic analysis. The foundation parameters show that the electrolysis process uses 20.57 kWh of power every kilogram of H2 generated. Energy and exergy efficiencies of the electrolyzer are 89.89% and 97.72%, respectively, exhibiting system efficiency. The research also examines how H2S mass flow rate and electrolysis temperature affect energy efficiency, exergy efficiency, and power consumption. Optimizing hydrogen generation and system performance requires these elements. This study analyzes the thermodynamics of hydrogen synthesis from H2S in GPPs to create sustainable and ecologically friendly energy options. H2S emissions from GPPs might be used to efficiently produce hydrogen as a renewable energy source with more research.
PENINGKATAN HASIL BELAJAR PESERTA DIDIK KELAS VII MELALUI MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) Fadhilla, Putri; Rahmasari, Eka; Budi Rahaju, Endah; Syamsiah, Siti
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 9 No. 2 (2024): Volume 09 No. 2 Juni 2024
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v9i2.13975

Abstract

This study aims to examine the improvement of student learning outcomes at SMP Negeri 8 Kediri through the Problem Based Learning (PBL) model in Mathematics instruction. This type of research is Classroom Action Research (CAR). The study focuses on the PBL model and student learning outcomes. The subjects of this research are 31 students of class VII G at SMP Negeri 8 Kediri. Data collection techniques were carried out through tests to measure student learning outcomes during the application of the PBL model. The research results showed a significant increase in learning outcomes and learning interest from the initial conditions to cycle II after using PBL. Learning outcomes in cycle II reached the determined success indicator, which increased to 74% from the pre-cycle rate of only 36%. In cycle I, the students' learning outcomes increased to 49%, and in cycle II, they increased further to 74%. This improvement indicates the successful implementation of the PBL model, thus it can be concluded that the application of the PBL model is effective in enhancing students' mathematics learning outcomes.
Co-Authors ENDAH BUDI RAHAJU Marcelinus Christwardana Rahmasari, Eka Siti Syamsiah Udi Harmoko