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All Journal Jurnal MIPA Neutrino Fullerene Journal of Chemistry SOSCIED Charm Sains : Jurnal Pendidikan Fisika Jurnal FisTa : Fisika dan Terapannya
Jeferson Polii
Universitas Negeri Manado
Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Analisa Heat Loss pada Pipa dari Demister Ke Turbin pada Pembangkit Listrik Tenaga Panas Bumi Lahendong Unit-2 Teshalonikha Gabriel Iglesia Miranda Saburu; Satyano Mongan; Jefferson Polii
Jurnal FisTa : Fisika dan Terapannya Vol 3 No 2 (2022): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v3i2.215

Abstract

Geothermal Power Plant in Lahendong is the largest power plant unit with environmentally friendly energy, with geothermal resources in North Sulawesi. At the Geothermal Power Plant in Lahendong unit-2, there are important components used to convert steam into electricity. These components include a demister, turbine, condenser, generator, cooling tower, injection well, and also a heat exchanger. One of the important pipes in the line of the Geothermal Power Plant is the pipe between the demister to the turbine. In the flow of steam in the unit-2 pipe from the demister to the turbine, it may experience heat loss during steam flow. The purpose of this study was to determine the amount of heat loss in the pipe from the demister to the turbine at Geothermal Power Plant Lahendong unit-2. This research uses the Steam Tabie application and Microsoft Excel. In this study, the results of the calculation of heat loss along the pipe from the demister to the turbine at the Lahendong Unit-2 Geothermal Power Plant amounted to 4465699 kJ/s
Estimasi Hilang Panas Alamiah Pada Manifestasi Mata Air Panas Desa Pinaesaan Kecamatan Tompaso Baru Kabupaten Minahasa Selatan Putri Isaura Christoffel; Armstrong F. Sompotan; Jefferson Polii
Jurnal FisTa : Fisika dan Terapannya Vol 4 No 1 (2023): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v4i1.241

Abstract

Geothermal energy is a source of heat energy stored in rocks and fluids contained below the earth's surface. One area that has geothermal potential in North Sulawesi is Pinaesaan Village, Tompaso Baru District. Around the village of Pinaesaan, geothermal manifestations are found, one of which is a hot spring. In determining the prospect of geothermal potential in an area, it is necessary to conduct research on surface manifestations. One of the steps taken in the study of surface manifestations is the calculation of natural heat loss (heat loss) at the research site. The method used in this study is direct measurement in the field by measuring air temperature, manifestation temperature and area of manifestation, which will then be processed through heat loss calculations. Based on the research, the average temperature of the hot spring manifestations in Pinaesaan village is the temperature manifestation 71,3˚C and air temperature 24,7˚C and the area of manifestation 2,94 m2. The value of heat loss is 0,0185 MW, and the speculative resource is 0.185 MW.
Pengaruh Tekanan Vakum Dan Perubahan Suhu Air Terhadap Efektivitas Main Condenser Di PLTP Lahendong Unit 2 Efrem Jesky Arruan; Cyrke Bujung; Jeferson Polii
Neutrino Vol 6 No 1 (2023)
Publisher : Publikasi dan UKI Press UKI Toraja.

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pembangkit Listrik Tenaga Panas Bumi adalah salah satu usaha untuk memenuhi kebutuhan Energi listrik. Dengan kemajuan teknologi dan industri yang menyebabkan penggunaan listrik semakin meningkat.Kondenser adalah salah satu komponen utama pada PLTP yang Efektivitas kerjanya harus terus dijaga. Tujuan dari penelitian ini adalah untuk mengetahui bagaimana pengaruh tekanan vakum dan perubahan suhu air terhadap efektivitas main condenser. Metode yang digunakan dalam penelitian ini adalah metode penelitian kuantitatif. Dengan teknik pengumpulan data melalui data teknis yang dilakukan dengan cara pengamatan langsung dan melalui metode literatur dimana data diperoleh dari buku design. Hasil penelitian ini menunjukan pengaruh tekanan vakum dan perubahan suhu air tehadap efektivitas main condenser dimana semakin naik nilai tekanan vakum maka keefektivan main condenserakan semakin meningkat dan beda temperatur air yang meningkat juga akan meningkatkan  keefektivan suatu main condenser. Perhitungan yang digunakan adalah unjuk efektivitas kondenser.
IMPLEMENTASI MODEL PROBLEM BASED LEARNING PADA MATERI GERAK MENGGELINDING TERHADAP PENINGKATAN HASIL BELAJAR PESERTA DIDIK Antameng, Johan Olden B.; Komansilan, Alfrits; Polii, Jefferson; Lahope, Kenny Setiawan
SOSCIED Vol 7 No 1 (2024): SOSCIED - Juli 2024
Publisher : LPPM Politeknik Saint Paul Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/jsoscied.v7i1.763

Abstract

Implementation of Problem Based Learning Model on Rolling Motion Material to Improve Students' Learning Outcomes. Thesis. Department of Physics. Faculty of Mathematics and Earth Sciences. Tondano. 2024. The problem in this study is that physics learning, especially in rolling motion material on an inclined plane, is done theoretically without so that students lack understanding of the material and the use of an inappropriate learning model that has an impact on the average score of students less than sixty-five, in other words insufficient. This study aims to examine the improvement of student learning outcomes with a problem-based learning model. The population of this study amounted to 240 students of class XII SMA Negeri 2 Bitung with a sample of 1 class for the experimental class and 1 class as a control class, each of which amounted to 25 people. This research method is quantitative. Data in this study were collected using pretest-posttest questions. Based on the discussion presented in this study in the previous section, it can be concluded that there is an increase in the learning outcomes of students on rolling motion material on an inclined plane with the Problem Based Learning model at SMA Negeri 2 Bitung.
EFEKTIVITAS PENGGUNAAN SIMULASI PHET TERHADAP HASIL BELAJAR SISWA PADA MATERI ASAS KONTINUITAS DI SMA NEGERI 1 LIKUPANG Rumimpunu, Fira F. N; Londa, Treesje K; Polii, Jeferson; Lolowang, Jimmy
SOSCIED Vol 7 No 1 (2024): SOSCIED - Juli 2024
Publisher : LPPM Politeknik Saint Paul Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/jsoscied.v7i1.767

Abstract

This research aims to determine the effectiveness of student learning outcomes using PhET simulation material on the principle of continuity for class XI students at SMA Negeri 1 Likupang. This research uses an experimental method with a Two Group design using Post-test Control Group Design. The sample for this research was taken from class XI MIA 1 as an experimental class which was taught using PhET Simulation with a total of 20 students and class The second class is homogeneous and equal. The data taken in this study came from the same post-test in both classes. The average post-test score for the experimental class was 87.35 and the post-test for the control class was 70.7, which means that student learning outcomes in the experimental class were higher than student learning outcomes in the control class. The research results were analyzed using the t-test with a significance level of 0.05, obtaining a value of tcount = 7.763 > ttable = 1.686, so H0 was rejected and H1 was accepted. Meanwhile, for the N-Gain Test, the percent obtained was 76, which is within the effective criteria. From the results of this research it can be concluded that the use of PhET simulations is effective on student learning outcomes in material as continuity.
KARAKTERISTIK I-V ELEKTRODA SUPERKAPASITOR BERBASIS KARBON AKTIF KULIT KACANG BATIK KAWANGKOAN Tamara, Gersom Jeremia; Polii, Jefferson; Tumimomor, Farly R.; Rampengan, Alfrie M; Mongan, Satyano W.
SOSCIED Vol 7 No 2 (2024): SOSCIED - November 2024
Publisher : LPPM Politeknik Saint Paul Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32531/jsoscied.v7i2.834

Abstract

The energy crisis is one of the major problems facing the world today, especially electrical energy. Supercapacitors are an alternative solution as an electrical energy storage divais. In this study, batik kawangkoan peanut shell samples have been successfully modified into activated carbon as a supercapacitor electrode. The carbonization process is given a carbonization temperature treatment of 350oC, 400oC, 450oC, 500oC, 550oC which is activated using a 7 M KOH solution by heating in a furnace at 750oC to produce a voltage of 0.966 V, 1.273 V, respectively, 1.295 V, 1.325 V, 1.654 V and currents of 18.56 mA, 23.43 mA, 26.47 mA, 30.53 mA, 48.24 mA which shows that there is a change in the value of current and voltage in supercapacitors, and the best sample is in the sample with 550oC carbonization temperature treatment. Thus, it can be concluded that carbonization temperature has an influence on the current and voltage characteristics of supercapacitor electrodes.
ANALISIS TIPE FLUIDA MANIFESTASI PANAS BUMI DI DESA KALEOSAN KABUPATEN MINAHASA UTARA Wantalangi, Windy; Palilingan, Rolles Nixon; Polii, Jeferson
Charm Sains: Jurnal Pendidikan Fisika Vol 1 No 3 (2020): OKTOBER
Publisher : Program Studi Pendidikan Fisika Jurusan Fisika Fakultas Matematika, Ilmu Pengetahuan Alam, dan Kebumian (FMIPAK), Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (636.062 KB) | DOI: 10.53682/charmsains.v1i3.52

Abstract

Geothermal field exploration and development activities are carried out in an effort to find geothermal resources, prove the existence of the resources and produce and utilize their fluids. Geothermal is a natural resource in the form of hot water or steam that forms in the earth's reservoirs through subsurface water heating by hot rocks. This study aims to determine the type of fluid and reservoir in Kaleosan Village, North Minahasa Regency. Areas that have geothermal potential are marked by the discovery of several geothermal manifestations in the form of hot springs. By using the ternary diagram plot method in the Kaleosan Village area of North Minahasa Regency, it was found that the reservoir in the area was a water-dominated type with an HCO3 content of 204 mg / L, Cl of 479 mg / L, and SO4 of 69 mg / L or based on the percentage of each parameter. has values ranging from HCO3 27%, Cl 64%, and SO4 9% which indicates that chloride(Cl) is the dominant content in the geothermal field.
Interpretasi Mekanisme Erupsi Gunung Api Lokon berdasarkan Aktivitas Kegempaan Pra-Erupsi 4 – 12 September 2014 Celvin Kristian Karisoh; Rolles Nixon Palilingan; Jeferson Polii
Jurnal FisTa : Fisika dan Terapannya Vol 5 No 1 (2024): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v5i1.309

Abstract

Prior to the eruption of Lokon Volcano on September 13 2014 at 03.09 WITA, there were 62 volcanic earthquake events recorded by seismometers since September 4 2014. This research aims to interpret the eruption mechanism of Lokon Volcano based on seismic activity in the pre-eruption period. 04 - 12 September 2014. The distribution of source points for volcanic earthquakes, both hypocenters, can be visualized using the seismic method, namely by processing digital seimogram data using Swarm 3.1.0 software, GAD (Geiger's method with Adaptive Damping) and Origin 8. Data used, sourced from three stations, namely, Empung (EMP), Wailan (WLN), Kinilow (KIN). Lokon volcano. The hypocenter distribution of volcanic earthquakes is concentrated at a depth of 0 - 1,500 m above sea level and it was found that the aseismic area which is assumed to be a shallow magma pocket area from the Lokon volcano is at a depth of 1,500 - 3,000 m above sea level. The interpretation results show that the eruption mechanism of Lokon Volcano originates from disturbances in the volcanic system which are thought to be the result of tectonic earthquakes in the subduction zone. This causes the magma to rise upwards to supply shallow magma pockets until it reaches maximum pressure and an eruption occurs.
Analisis Viskositas Lube Oil Di Turbin Unit 2 PLTP Lahendong Rizqie Emeninta Putri; Jeferson Polii; Alfrie Musa Rampengan
Jurnal FisTa : Fisika dan Terapannya Vol 5 No 1 (2024): APRIL
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v5i1.344

Abstract

Viscosity, also known as fluid viscosity, is a fluid characteristic that provides shear stress resistance by the fluid. Viscosity describes a fluid's resistance to a flow so that it can be used to measure fluid friction. The viscosity of a lubricant is affected by changes in temperature and pressure. The pressure increases if the value of the viscosity increases, the higher the pressure, the more significant the fluid's viscosity. This study aims to find out the viscosity value of lube oil in turbine unit 2 of the Lahendong PLTP. Based on the results of the calculation, the result was obtained from the viscosity value of lube oil in turbine unit 2 of 373.61 kg/ms with a pressure of 30591.486 kg/m2, and the viscosity value increased by 386.06 kg/ms due to an increase in pressure of 31611.2 kg/m2.
Analisis Karakteristik Fluida dan Estimasi Temperatur Reservoir Desa Sawangan Kabupaten Minahasa Utara Gloria Permatasari; Armstrong F. Sompotan; Jeferson Polii
Jurnal FisTa : Fisika dan Terapannya Vol 5 No 2 (2024): OKTOBER
Publisher : Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/fista.v5i2.355

Abstract

Geothermal energy is the heat stored within the Earth’s subsurface rocks and the fluids contained within them. Indonesia, located on the Ring of Fire, has significant geothermal potential, particularly in North Sulawesi. This study aims to assess the geothermal energy potential in Sawangan Village, North Minahasa Regency, specifically at the Kepangian River hot springs. The research was conducted by analyzing the fluid characteristics and estimating the geothermal reservoir temperature using geochemical fluid analysis and geothermometer calculations. The analysis Involved laboratory testing of fluid samples, followed by data processing using Na-K and silica geothermometers, and plotting on a Na-K-Mg ternary diagram. The results indicate that the fluid type at the Kepangian River hot springs is immature water, with an estimated reservoir temperature ranging from 240.04°C to 267.01°C, which classifies it as a high-temperature reservoir.
Co-Authors Alfrie Musa Rampengan Alfrits Komansilan Angely Syuly Ratag Antameng, Johan Olden B. Armando Ariakta Aloanis Armstrong F. Sompotan Aslam Rais Brenda Bella Gunena Celvin Kristian Karisoh Cyrke A N Bujung Djeli Alvi Tulandi Donny Royke Wenas Efrem Jesky Arruan Farly Reynol Tumimomor Gisella Gabriella Tangkere Gloria Permatasari Heindrich Taunaumang Heinrich Taunaumang Jimmy Lolowang Lahope, Kenny Setiawan Lolowang, Jimmy Marcelino Datunsolang Musa Salvador Arikalang Olivia Betricha Gare Patricia Mardiana Silangen Poluakan, Willy Ch A. Priskilla Wulandari Polimpung Putri Isaura Christoffel Rampengan, Alfrie M Ravael Ratumbuysang Rigitha Petrisia Raco Risma P. Sambolayuk Rizqie Emeninta Putri Rolles Nixon Palilingan Ronaldo Rukait Rumimpunu, Fira F. N Satyano W Mongan Sumita Ginoga Tamara, Gersom Jeremia Tengker, Soenandar Millian Tompunu Tesalonika Lontoh Teshalonikha Gabriel Iglesia Miranda Saburu Treesje K. Londa Truly Daniel Tumimomor, Farly R. Uranti Amba Lembang Wantalangi, Windy