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All Journal Metta : Jurnal Ilmu Multidisiplin Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) Innovative: Journal Of Social Science Research
Parsaulian, Kevin Sahat
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THE IMPACT OF ENSO PHENOMENA ON ELECTRICITY PRODUCTION AT MRICA HYDROELECTRIC POWER PLANT IN CENTRAL JAVA (2013-2023) Parsaulian, Kevin Sahat; Abdillah, Muhammad Rais
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 5 No. 2 (2025): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/morfai.v5i2.2810

Abstract

This study investigates the impact of the El Niño Southern Oscillation (ENSO) on electricity production at the Mrica Hydroelectric Power Plant (PLTA Mrica) in Central Java from 2013 to 2023. ENSO is global climate phenomenon, influences rainfall and ocean circulation in various regions, including Indonesia. Data on rainfall and river discharge from the Serayu River were analyzed to determine how ENSO affects the operational efficiency of PLTA Mrica. The study reveals that strong El Niño events, such as those in 2015, significantly reduced river discharge, leading to decreased electricity production. Conversely, the La Niña event in 2020 increased river discharge, enhancing electricity production. The findings underscore the critical need for adaptive water resource management and continuous monitoring to optimize electricity generation at PLTA Mrica, particularly in the face of climate variability induced by ENSO. This research contributes to understanding the relationship between climate phenomena and hydroelectric power generation.
Analisis Potensi Ocean Thermal Energy Conversion (OTEC) di Wilayah Geografis Laut Barat Sumatera Parsaulian, Kevin Sahat; Amir, Afif Asykar; Gunawan, Andit Zelly
Metta : Jurnal Ilmu Multidisiplin Vol. 5 No. 3 (2025)
Publisher : Jayapangus Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37329/metta.v5i3.4699

Abstract

Ocean Thermal Energy Conversion (OTEC) is an emerging marine renewable energy technology that exploits the natural temperature gradient between warm surface seawater and cold deep-sea water to generate electricity. This thermal energy potential is especially significant in tropical regions such as Indonesia, where oceanographic conditions are favorable. The West Sumatra Sea, bordering the Indian Ocean, is identified as a promising site for OTEC development due to its consistently high surface temperatures and considerable bathymetric depth. This study aims to assess the monthly vertical and horizontal temperature distributions, evaluate the seasonal variations, and calculate the theoretical efficiency of OTEC systems in the region. Ocean temperature data were sourced from the Copernicus Marine Environment Monitoring Service (CMEMS) and analyzed using Ocean Data View (ODV) software. Results indicate that surface water temperatures range between 29.3°C and 30.57°C, while deep-sea temperatures at 600 meters depth remain around 8.96°C. The average vertical temperature difference (∆T) throughout the year is approximately 21°C, satisfying the minimum threshold for OTEC viability. The thermocline layer is located between 40 and 77 meters, while deep water extends beyond 900 meters. The calculated average Carnot efficiency is 0.70, indicating a strong theoretical potential for energy conversion. Seasonal analysis also shows stable ∆T values during transitional monsoon periods, suggesting year-round operational feasibility. These findings confirm that the oceanographic characteristics of the West Sumatra Sea support the sustainable development of OTEC technology and highlight its strategic potential in contributing to Indonesia’s renewable energy transition.
Pengaruh Gaya Kepemimpinan Dan Budaya Organisasi Terhadap Produktivitas Dengan Kepuasan Kerja Sebagai Variabel Intervening Pada Karyawan Wisata Alam Gunung Dago Bogor Jawa Barat Parsaulian, Kevin Sahat
Innovative: Journal Of Social Science Research Vol. 4 No. 1 (2024): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v4i1.7800

Abstract

Sumber daya manusia adalah penting bagi setiap organisasi, baik pemerintah maupun swasta untuk menjalankan bisnis mereka sesuai dengan tujuan yang ditetapkan termasuk di pengelolaan wisata alam Gunung Dago. Penelitian ini bertujuan untuk menganalisis pengaruh gaya kepemimpinan dan budaya organisasi terhadap produktivitas melalui kepuasan kerja sebagai variabel intervening. Penelitian ini menggunakan metode deskriptif kuantitatif dengan menyebarkan kuesioner kepada responden. Populasi penelitian ini adalah karyawan yang aktif bekerja di wisata alam Gunung Dago di Bogor sebanyak 33 orang. Data dikumpulkan melalui kuesioner berbasis Google Form. Setelah data terkumpul, analisis dilakukan dengan menggunakan Structural Equation Modeling (SEM) atau SmartPLS. Hasil analisis data gaya kepemimpinan memiliki pengaruh positif dan signifikan terhadap kepuasan kerja. Budaya organisasi memiliki pengaruh positif dan signifikan terhadap kepuasan kerja. Gaya kepemimpinan berpengaruh namun tidak secara signifikan terhadap produktivitas, demikian pula dengan budaya organisasi. Sementara itu, kepuasan kerja memiliki pengaruh positif dan signifikan terhadap produktivitas. Gaya kepemimpinan memengaruhi produktivitas secara positif melalui kepuasan kerja sebagai variabel intervening. Begitu pula, budaya organisasi memberikan pengaruh positif terhadap produktivitas melalui kepuasan kerja sebagai variabel intervening.
Co-Authors Abdillah, Muhammad Rais Amir, Afif Asykar Gunawan, Andit Zelly