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PROGRAM STUDI FISIKA FAKULTAS MATEMATIKA ILMU PENGETAHUAN ALAM DAN KEBUMIAN UNIVERSITAS NEGERI MANADO Jl. Kampus Unima, Kel. Koya, Kec. Tondano Selatan, Minahasa, Indonesia
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Jurnal FisTa : Fisika dan Terapannya
Published by Universitas Negeri Manado
ISSN : -     EISSN : 27471691     DOI : https://doi.org/10.53682/fista.xxxx.xxx
Core Subject : Science, Engineering,
Astronomy Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
Jurnal FisTa : Fisika dan Terapannya merupakan salah satu Jurnal Nasional dalam bidang Ilmu Fisika dan Terapannya di bawah pengelolaan Program Studi Fisika Fakultas Matematika Ilmu Pengetahuan Alam dan Kebumian, Universitas Negeri Manado. Jurnal FisTa : Fisika dan Terapannya memiliki nomor eISSN 2747-1691. Jurnal FisTa : Fisika dan Terapannya diterbitkan pertama kali pada tahun 2020. Hal ini dilakukan, untuk merespon para mahasiswa, dosen dan juga peneliti di bidang Fisika dan Terapannya untuk dapat membagi hasil penelitiannya dalam bentuk artikel ilmiah. Ruang lingkup artikel dalam Jurnal FISTA Fisika dan Terapannya adalah Ilmu Fisika dan Terapannya, diantaranya terkait dengan topik : Fisika Material; Fisika Teori; Fisika Material Lunak; Fisika Komputasi; Fisika Instrumentasi; Astronomi; Fisika Koloid; Geofisika; Elektronika: Fisika terapan terkait lainnya.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 10 Documents
 1 
Search results for , issue "Vol 2 No 2 (2021): OKTOBER" : 10 Documents clear
DISTRIBUSI SUHU BAWAH PERMUKAAN MANIFESTASI PANAS BUMI UNTUK ANALISIS GRADIEN SUHU DI BUKIT KASIH KANONANG Anisa Bilondatu; Treesje Londa; Cryke Bujung
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.130

Abstract

The existence of geothermal resources below the surface can be shown, among others, by the presence of land which has a temperature higher than the surrounding soil temperature. This occurs due to the conduction of heat transfer from subsurface rocks to surface rocks. How is the temperature distribution below the surface, and the temperature gradient pattern of geothermal manifestations in Bukit Kasih Kanonang, is interesting to study considering that the area is a tourist area as well as a natural laboratory for the geothermal system. The research objective was to determine the subsurface temperature distribution of geothermal manifestations and temperature gradient patterns in the tourist area of ​​Bukit Kasih Kanonang. Data collection was carried out by means of direct measurements in the field. Measurements were made at 20 measuring points with a depth of 3 cm, 9 cm, and 15 cm respectively. Data processing using Ms. software. Office Excel and Surfer 12. The results showed that the geothermal manifestations in the tourist area of ​​Bukit Kasih Kanonang had an average temperature range of 3.83 0C to 97.97 oC at a depth of 3 cm, 48.43 0C to 96.93 0C at a depth of 9 cm, and 52.9 0C to 96 ,60C at a depth of 15 cm. The temperature gradient increases with each depth. Linear temperature gradient in the morning.
ANALISIS EKSERGI DAN OPTIMASI PEMBANGKIT LISTRIK TENAGA PANAS BUMI LAHENDONG UNIT-2 Armando Ariakta Aloanis; Heindrich Taunaumang; Alfrie Rampengan; Jeferson Polii
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.131

Abstract

Geothermal development is carried out by increasing the efficiency of existing generators. In this study, geothermal development at the Lahendong Unit-2 geothermal power plant is carried out by conducting exergy analysis and optimizing geothermal plant efficiency using a genetic algorithm by adjusting the pressure on the separator. Exergy calculations and optimization of genetic algorithms, using the Python programming language with the help of libraries such as PyXSteam, Pandas, Numpy, matplotlib, random, and time. Exergy flow and efficiency are calculated on the components of the separator, turbine, condenser, cooling tower, and the entire plant. The amount of exergy that enters the generator from geothermal fluids is 28882.73 kW. The amount of exergy that comes in produces an output power of 13,000 kW with an overall efficiency of the generator is 45.010%, and the amount of exergy from brine is 1794.11 kW. Optimization using the genetic algorithm method produces the most optimal output power value of 13035,480445 kW at a separator pressure of 10.4025 bar. The increased quality of the steam generates this increase in power so that the mass flow rate of the steam that rotates the turbine becomes more than before.
ANALISA TIPE FLUIDA MANIFESTASI PANASBUMI MENGGUNAKAN DIAGRAM TRILINIER CL-SO4-HCO3 DI DESA BAKAN KECAMATAN LOLAYAN KABUPATEN BOLAANG MONGONDOW Aslam Rais; Heindrich Taunaumang; Jeferson Polii
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.132

Abstract

Indonesia is an area that could potentially be the source of the power of nature, including the source of power geothermal (geothermal). This is because Indonesia is a country located in the area of the world's ring of fire, where the tectonic plate stretches from the tip of the island of Sumatra, Java, to the Bandang Maluku area. Wrong one area in North Sulawesi, which has manifestations of geothermal, namely the village Bakan, the District Lolayan, District Bolaang Mongondow. In areas that are manifestations of geothermal eyes water hot. With the presence of one of the manifestations that the area that there is a potential for geothermal. Methods have used that method of geochemical and retrieval of data physical and samples of water hot in the field and then do the analysis laboratory on samples that. Based on the results of the research content of ions Cl, SO4 and HCO3 in a sample of water in the village Bakan which has been analyzed and the results of the calculation of the percentage of each ion that has been plotted into the diagram ternary showed that samples of water in the village Bakan is water sulfate (SO4), with the temperature manifestations 78 and the air temperature of 26 and pH showed value between 5 and 6 which means that the nature of the manifestations that are acidic due to having a pH less than 7.
PROFIL VERTIKAL DAN LUAS BIDANG DINAMIKA HARIAN GRADIEN SUHU UDARA DI ATAS PERMUKAAN AIR LAUT DAN DI DALAM AIR LAUT Erixio Mewoh; Patricia Silangen; Alfrie Rampengan; Christophil Medellu
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.133

Abstract

The temperature in sea water varies at each depth. The temperature of sea water at the surface is higher and the temperature at a deeper point is decreasing slowly. This study aims to determine the model of the temporal, spatial function, and dynamic models of daily temperature gradients above sea level and in sea water. This type of research is included in the type of exploratory research that is quantitative in nature. The research is in Tulaun hamlet, Lalumpe Village, Kombi District, Minahasa Regency, North Sulawesi Province, Indonesia. The research was conducted for 24 hours at 9 points, ranging from 0 cm, 10 cm, 30 cm, 60 cm, 100 cm, 150 cm, 220 cm, 300cm, to 400cm. The research variables were temperature and light intensity. Data processing in this study is to enter existing data into the Matlab application. The results of the study of changes in the functional model above sea level and in seawater are influenced by the heat absorption process of air temperature.
PROFIL VERTIKAL DAN LUAS BIDANG DINAMIKA HARIAN GRADIEN SUHU UDARA DI ATAS PERMUKAAN LAHAN TERBUKA, LAHAN BERVEGETASI DAN PERMUKAAN ASPAL Givraldi Kumentas; Donny Wenas; Alfrie Rampengan; Christophil Medellu
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.134

Abstract

This study aims to determine the temporal function model, spatial temperature and dynamic models of air temperature gradients over the surface of open land, vegetated land, and asphalt surface. The research location is at the State University of Manado in the hills of Tonsaru South Tondano, Minahasa Regency. The research methodology was carried out on three transects at nine altitude positions for 24 hours of measurement time, measuring positions ranging from the ground level to 0cm, 10cm, 30cm, 60cm, 100cm, 150cm, 220cm, 300cm, to 400cm. Data processing carried out in this study is by entering data on air temperature, the measured ground surface into the Matlab application. It can be shown that temporal changes and vertical spatial variations in air temperature show different but relatively the same curve shapes in hot weather conditions during the day, expressed by using a mathematical model of the Fourier function and daily dynamics of air temperature gradients on various land surfaces is influenced by the process of heat absorption and thermal emission processes from the soil in various lands.
ANALISIS DISTRIBUSI TEMPERATUR PERMUKAAN TANAH DI WILAYAH POTENSI PANAS BUMI DI SEKITAR SESAR PALU KORO MENGGUNAKAN TEKNIK PENGINDERAAN JAUH Gregorius Siga; Cyrke Bujung; Jeilen Gabriela Nusa
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.136

Abstract

As one of the countries in the tropical region, Indonesia is blessed with various energy resources, one of which is geothermal energy. The existence of geothermal sources on the surface is reflected in the appearance of manifestations to the earth's surface, namely hot springs, fumaroles, etc. This study described the distribution of soil surface temperature to determine the surface temperature and the direction of the surface temperature opening around the Palu Koro Fault, Central Sulawesi. This study used remote sensing methods with thermal infrared channels recorded in 2015, 2017, 2018, 2019, and 2020. The results showed that the ground surface temperature in the geothermal potential area ranges from 31,5501°C - 38,8913°C, and the direction of the temperature opening is in the northwest to the southwest to the Southeast and is getting closer to the Palu Koro Fault.
ANALISIS PERFORMA MENARA PENDINGIN MECHANICAL INDUCED DRAUGHT ALIRAN COUNTERFLOW PADA PEMBANGKIT LISTRIK TENAGA PANAS BUMI LAHENDONG UNIT 5 Jeisi Meilita Walangitan; Cyrke Bujung; Farly Tumimomor
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.137

Abstract

In the geothermal power plant process, the main cooling water system is required to maximize the power plant, one of them is using the cooling tower. The Cooling Tower is an incredibly vital cooler. So, the performance must be noted is still in accordance with initial conditions. The purpose of this research is to determined the performance of Mechanical Induced Draught counterflow Cooling Tower in Lahendong Geothermal Power Plan Unit 5 with quantitative research for 7 days with 10 hours of operational work. In Lahendong Geothermal Power Plant Unit 5. The result of this research showed the performance of Mechanical Induced Draught Counterflow Cooling Tower in Lahendong Geothermal Power Plan Unit 5. The range increased up to 14.2 C, in the morning because of the high humidity, the effectiveness which also increases in the morning and the airflow conditions which still remain. So, this research will be concluded when the performance of Mechanical Induced Draught Counterflow Cooling Tower Geothermal Power Plant Unit 5 is still in normal operation conditions and needs to do Make-up Water amounts of 387.81 m3/h.
PERBANDINGAN KARAKTERISTIK KARBON AKTIF ARANG TEMPURUNG KELAPA DAN ARANG TEMPURUNG KEMIRI MENGGUNAKAN SCANNING ELECTRON MICROSCOPIC DAN FOURIER TRANSFORM INFRA RED Lauri Leslie Mendame; Patricia Silangen; Alfrie Rampengan
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.138

Abstract

Utilization of coconut shell and candlenut shell in Indonesia has not been used optimally as in North Sulawesi. The purpose of this research was to compare the characteristics of the pore size and functional groups of activated carbon, coconut shell charcoal and candlenut shell charcoal. The research method includes the activation stage and characterization of activated carbon using Scanning Electron Microscopic (SEM) and Fourier Transform Infra Red (FTIR). The results of this study are the characteristics of coconut shell charcoal activated carbon which has a larger pore size of 31.5 µm - 41.9 µm when compared to candlenut shell charcoal activated carbon which has a small pore size, namely 23.0 µm - 33.1 µm. . Both of these activated carbons have the same functional group, namely O-H, C=C, C-O, C-H which is an activated carbon composition.
PENGARUH PERUBAHAN BEBAN TERHADAP EFISIENSI GENERATOR DI UNIT 2 PLTP LAHENDONG Mince Manguma; Armstrong Sompotan; Jeilen Nusa
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.139

Abstract

Indonesia is a country that is located on the ring of fire or a volcanic route that is rich in geothermal potential. Geothermal is a renewable resource that is environmentally friendly by utilizing magma from the bowels of the earth. PLTP Lahendong unit 2 is a generating unit located in the city of Tomohon, North Sulawesi, which is capable of generating 20 MW of electrical energy. In a generator one of the most important components is the generator. There are many problems that can affect the work of the generator, for example, the reduced efficiency of the generator. Declining efficiency can affect the electrical energy that is flowing not optimally due to generator losses, and a lot of electricity is lost because of this. Therefore, it is necessary to analyze the efficiency of the generator to see whether or not the effect of the load generated by the generator has an effect on the efficiency of the generator. The results of the study which were then analyzed for 14 days between 09:00 and 21:00 obtained the calculation results which were then analyzed that the lowest load value generated by the generator was 12 MW with generator efficiency of 72% and the highest load value was 19 MW with efficiency of 93% and obtained an average load of 16MW with an efficiency difference of 21%. This shows that the value of the load generated by the generator affects the efficiency of the generator. From the results above, it can be recommended to the related company for further action.
ANALISIS SIFAT KIMIA FISIK FLUIDA DAN ESTIMASI TEMPERATUR RESERVOIR DI DAERAH MANIFESTASI PANAS BUMI BAKAN BOLAANG MONGONDOW Marcelino Datunsolang; Cyrke Bujung; Jeferson Polii
Jurnal FisTa : Fisika dan Terapannya Vol 2 No 2 (2021): 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.v2i2.140

Abstract

Bolaang Mongondow is an area that has an active volcano, namely the Ambang volcano, which is located in the village of Bakan. The existence of hot spring manifestations that appear indicates the potential for geothermal energy in the area. However, until now, geothermal potential in the area has not been developed due to a lack of knowledge about determining geothermal potential. For this reason, research on reservoir characteristics such as fluid type and reservoir temperature estimation is carried out. The method used in this research is the geochemical analysis of the fluid in the form of the percentage of fluid content and the calculation of the geothermometer. Fluid type analysis was determined based on plotting on ternary Na-K-Mg diagrams. While the reservoir temperature estimation is determined using the Na-K geothermometer equation. From the physical-chemical analysis of fluids in Bakan hot springs, it was found that the type of fluid in the Bakan area was immature water. Based on the estimated reservoir temperature calculation using a Na-K Geothermometer, the subsurface temperature ranges from 235 ℃ - 242 ℃ and includes a High-temperature reservoir.

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