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All Journal APTEKINDO ELECTRANS JITTER (Jurnal Ilmiah Teknologi Informasi Terapan) Indonesian Journal of Electrical Engineering and Computer Science Journal La Multiapp Jurnal Nasional Teknik Elektro dan Teknologi Informasi Journal of Environment and Sustainability Education SNTE
Tasma Sucita
Departemen Pendidikan Teknik Elektro, Universitas Pendidikan Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Physics Other

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Journal : Journal La Multiapp

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Cooling Tower Performance Analysis Using Range and Approach Method Unit 4 in Pt. Pertamina Geothermal Energy Kamojang Area Ramadan, Ripa Hikmah; Sucita, Tasma
Journal La Multiapp Vol. 6 No. 4 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i4.2306

Abstract

Geothermal Power Plant (PLTP) is one of the renewable energy sources that supports the national energy transition. One of the important components in the PLTP system is the cooling tower which functions to lower the temperature of the condensed water so that it can be reused in the thermodynamic cycle. This study aims to analyze the performance of the cooling tower at PLTP Kamojang Unit 4 owned by Januari Pertamina Geothermal Januari using the Range and Approach methods based on the ASME PTC 23-2003 standard. Data were obtained from operational logsheets during the period from 4 to 10 January 2025 and analyzed using Microsoft Excel. The parameters observed included inlet water temperature, outlet water temperature, and wet bulb air temperature. The results of the analysis showed that the range value ranged from 35.61°C to 36.48°C, the approach value between 4.73°C to 5.12°C, and the effectiveness of the cooling tower was in the range of 87.42% to 88.52%. These values indicate that the cooling tower is still operating at high efficiency. Daily fluctuations in these values are influenced by environmental factors such as air humidity, wet bulb temperature, and variations in cooling load. In addition, internal factors such as fan conditions, water spraying, cooling water quality, and media packing conditions also contribute to system performance. Based on these results, it is recommended that regular monitoring and preventive maintenance be carried out to maintain the efficiency of the cooling system. With improvements and digitalization of monitoring, the cooling tower at PLTP Kamojang Unit 4 can continue to support power plant operations optimally and sustainably.
Performance Analysis of Synchronous Generators at Kamojang Geothermal Power Plant Unit 5 Based on Operational Parameters of Power, Current, and Voltage Alamsyah, Amanda Putri; Sucita, Tasma; Mulyana, Elih
Journal La Multiapp Vol. 6 No. 5 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i5.2333

Abstract

Geothermal energy is one of the potential and sustainable renewable energy sources in Indonesia. The efficiency of the generation system is one of the crucial aspects in optimizing the utilization of this energy. This study aims to analyze the performance of synchronous generators at the Kamojang Unit 5 Geothermal Power Plant based on power, current, and voltage parameters. The method used is a quantitative descriptive approach with field data collection for seven consecutive days in January 2025. The data observed include active power, apparent power, power factor, terminal voltage, phase current, and generator efficiency and current imbalance between phases. The results showed that the generator had high and stable daily efficiency with an average of 93.99%. The power factor was also classified as good, with an average of 91.23%. The highest phase current imbalance occurred in phase V with an average of 1.60%, but was still within the safe threshold according to IEEE standards. These findings indicate that the generation system at the Kamojang Unit 5 Geothermal Power Plant operates in an efficient and stable condition. This study also indicates the importance of monitoring operational parameters periodically as part of a maintenance strategy and increasing the reliability of geothermal power plants. With high efficiency and system stability, Kamojang Unit 5 Geothermal Power Plant can be a model for reliable and sustainable renewable energy power plant operation.
Co-Authors Aam Hamdani, Aam Abdus Salam Agus Solehudin Aip Saripudin Alamsyah, Amanda Putri Arjuni Budi Pantjawati Bachtiar Hasan Dadang Lukman Hakim Diki Fahrizal Elih Mulyana, Elih Enjang Akhmad Juanda Fahrizal, Diki Hidayahtulloh, Rizky Heryanto I Wayan Ratnata Jaja Kustija Lesmana, Ridwan Maman Somantri Mia Agista Mukhidin - Ramadan, Ripa Hikmah Roer Eka Pawinanto, Roer Eka Sumarto Sumarto Wasimudin Surya Saputra Yadi Mulyadi