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Sahrul Hidayat
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Jurnal Ilmu dan Inovasi Fisika
Published by Universitas Padjadjaran
ISSN : 25490516     EISSN : 25497014     DOI : http://dx.doi.org/10.24198/jiif
Core Subject : Science, Social, Engineering,
Computer Science & IT Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology
JIIF (Jurnal Ilmu dan Inovasi Fisika) is a scientific journal that contains research results covering theoretical, simulation and modeling studies, experiments, engineering and exploration in the field of Physics and its Applications.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 8 Documents
 1 
Search results for , issue "Vol 9, No 1 (2025)" : 8 Documents clear
EFFECT OF THERMOELECTRICS AS A COOLING SYSTEM ON PHOTOVOLTAIC EFFICIENCY AND ECONOMIC ANALYSIS Abdul Hakim, Muhammad Fuad; Nurhilal, Otong
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 9, No 1 (2025)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v9i1.60647

Abstract

Photovoltaics (PV) are one way to utilize sunlight as a renewable energy source. However, currently commercially available PV is only capable of converting around 15% of sunlight into electrical energy, while the rest is converted into heat which can increase the temperature of the PV itself. On the other hand, increasing PV temperature results in a decrease in the output power produced and ultimately reduces efficiency. Therefore, efforts are needed to reduce the PV temperature in order to increase efficiency, namely by adding a cooling system to the PV. One PV cooling system that tends to be new is the thermoelectric cooler (TEC). However, the use of TEC will increase the cost of TEC components and electrical power. This research aims to determine the effect of using TEC as a cooling system on PV efficiency and its economic analysis. Two PV units are used, with a TEC cooling system and without a cooling system which is used as a reference. Experiments were carried out outdoors in direct sunlight. The results showed that the use of TEC as a cooling system was able to increase PV efficiency by 6.45%. Meanwhile, from an economic analysis using levelized cost of energy (LCOE), it was found that, although it can increase PV efficiency, the use of TEC as a cooling system has an LCOE of Rp. 15,871/kWh, meaning that using TEC is more expensive than LCOE without a cooling system, namely only Rp. 5,350/kWh.
First Generation Solar Cell: Development and Future Potential GULTOM, NOTO SUSANTO
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 9, No 1 (2025)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v9i1.58203

Abstract

The transition towards new and renewable energy in an effort to address environmental issues and limitations of conventional energy reserves remains a global priority to this day. Solar energy, with photovoltaic technology, is one of the promising options in reducing the impact of conventional energy on the environment. This is supported by the fact that solar energy is a sustainable energy source and one way to reduce dependence on fossil energy. Solar cells or photovoltaic cells are devices made of semiconductor materials that can convert solar energy into electrical energy. In the first generation, solar cells were divided into monocrystalline, polycrystalline, and III-V single junction based on GaAs. This article examines the characteristics of first-generation silicon-based solar panels, including efficiency, absorption, and light transmission, which dominate the global market. This review aims to provide an in-depth understanding of the factors that affect the performance of silicon-based solar cells, for the development and application of solar cell technology in the future.
Prototipe Vending Machine Pengisian Air Mineral Otomatis dengan Sistem Pembayaran berbasis Sensor Single Coin Acceptor Sutanto, Willi
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 9, No 1 (2025)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v9i1.57332

Abstract

Vending machine pengisian air mineral otomatis dapat memudahkan manusia untuk mendapatkan air mineral di tempat umum, seperti tempat perbelanjaan dan institusi pendidikan. Vending machine ini dapat meminimalisir penggunaan botol plastik karena konsumen dapat menggunakan tumbler pribadi dalam pengisian air mineral. Prototipe ini dirancang sebagai suatu sistem pengisian air mineral otomatis untuk volume 300 ml, 600 ml dan 900 ml dengan pembayaran berbasis sensor single coin acceptor yang di supply menggunakan catu daya 12 V. Sensor single coin acceptor memberikan sinyal ke Arduino Uno untuk mendeteksi jenis uang koin, jika uang koin yang dimasukkan sesuai maka Arduino akan memberi perintah ke relay untuk mengaktifkan pompa. Pompa akan menghisap air dari galon melalui selang melewati water flow sensor untuk dideteksi volumenya. Jika volume air telah sesuai dengan permintaan konsumen, maka water flow sensor akan memberi sinyal ke Arduino untuk memerintahkan relay menonaktifkan pompa. Pengujian prototipe yang dilakukan berupa uji fungsionalitas, linearitas water flow sensor, akurasi prototipe, penyortiran jenis uang koin dan pembatasan jumlah uang koin. Hasil pengujian menunjukkan bahwa prototipe dapat mengeluarkan air mineral sesuai jumlah uang koin yang dimasukkan, dapat menolak koin yang tidak sesuai, memiliki linearitas sensor yang baik dengan R2 sebesar 0,99 dan penakaran volume air mineral yang akurat dengan nilai eror sebesar 0,02% atau akurasi sebesar 99,98%.
Penerapan Metode Induced Polarization Untuk Mengidentifikasi Sebaran Air Asin di Daerah Sekitar Sumur Garam Desa Manis Raya Suwiryo, Karto; Zulfian, Zulfian; Muhardi, Muhardi
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 9, No 1 (2025)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v9i1.58023

Abstract

Penerapan metode induced polarization telah dilakukan untuk mengidentifikasi sebaran air asin di daerah sekitar sumur garam Desa Manis Raya menggunakan konfigurasi Wenner–Schlumberger. Penelitian ini memanfaatkan alat Automatic Resistivity System Multielectroda (ARES) dengan membentang kabel sebanyak 2 lintasan. Setiap lintasan masing-masing mempunyai panjang 195 m dengan spasi sebesar elektroda 5 m. Nilai chargeabilitas dengan rentang 0,173 ms – 5,59 ms diduga merupakan daerah sebaran air asin. Pada lintasan satu sebaran air asin dimulai dari jarak 5 m hingga 95 m dan 160 m hingga 195 m, menyebar ke arah utara dan selatan dari sumur garam pertama. Pada lintasan dua dimulai dari jarak 20 m hingga 195 m menyebar ke arah barat dan timur sumur garam pertama.
Pengembangan Sistem Monitoring Gempa Bumi Berbasis Arduino Uno Pada Pulau Bawean Rusdiana, Nadia; Maghfiroh, Lailatul; Syafiqoh, Rizka Putri; Cahyani, Lia Amelia; Nisa', Nafista Rohmatun; Nurita, Tutut; Mahdiannur, Muhammad Arif; Subekti, Hasan
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 9, No 1 (2025)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v9i1.59360

Abstract

Penelitian ini bertujuan untuk mengembangkan sistem monitoring gempa berbasis Arduino Uno di Pulau Bawean, yang rawan terhadap aktivitas tektonik di Laut Jawa. Menggunakan sensor getar SW-420, alat ini mampu mendeteksi getaran tanah akibat gempa dan memberikan peringatan dini melalui buzzer ketika aktivitas seismik mencapai ambang batas tertentu. Data yang diperoleh dari sensor dikendalikan oleh mikrokontroler Arduino Uno, kemudian ditampilkan pada layar LCD untuk memudahkan analisis dan pemantauan. Penelitian ini menggunakan metode Research and Development (R&D) dan melibatkan beberapa tahapan desain perangkat keras dan perangkat lunak. Hasil simulasi menunjukkan bahwa alat ini dapat memberikan informasi yang akurat dan responsif mengenai frekuensi serta amplitudo getaran. Dengan potensi pengembangan lebih lanjut, sistem ini diharapkan dapat menjadi solusi praktis untuk memitigasi risiko bencana di wilayah-wilayah rawan gempa seperti Pulau Bawean.Kata Kunci: Sistem monitoring gempa, Arduino Uno, sensor getar SW-420, Pulau BaweanThis research aims to develop an Arduino Uno-based earthquake monitoring system on Bawean Island, which is prone to tectonic activity in the Java Sea. Using the SW-420 vibration sensor, this tool is able to detect ground vibrations due to earthquakes and provide early warning via buzzer when seismic activity reaches a certain threshold. The data obtained from the sensor is controlled by the Arduino Uno microcontroller, then displayed on the LCD screen to facilitate analysis and monitoring. This research uses the Research and Development (R&D) method and involves several stages of hardware and software design. Simulation results show that this tool can provide accurate and responsive information regarding vibration frequency and amplitude. With the potential for further development, it is hoped that this system can become a practical solution for mitigating disaster risk in earthquake-prone areas such as Bawean Island.Keywords: Earthquake monitoring system, Arduino Uno, SW-420 vibration sensor, Bawean Island
The effect of calcination temperature on ZnO crystals based on emission spectrum from photoluminescence characterization Aprilia, Annisa
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 9, No 1 (2025)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v9i1.60621

Abstract

This study synthesized ZnO powder using the sol-gel method to investigate its optical properties. ZnO samples were calcined at 150°C, 300°C, and 450°C under nitrogen (N₂) flow. TGA/DTA analysis showed that most solvent residues or impurities were decomposed at 450°C. This result is supported by the XRD results, which showed an increase in the degree of crystallinity with increasing temperature. At the same time, the hexagonal wurtzite structure of ZnO gel remained intact after calcination. SEM-EDS analysis revealed agglomerated morphology and a disproportionate Zn:O ratio in all samples, with excess Zn atoms. This is probably attributed to the presence of interstitial Zn defects. The photoluminescence spectrum showed higher intensity in the UV region compared to the visible range, indicating good crystallinity. The blue shift in the emission with increasing temperature stated the presence of several different defects in the material. In particular, the green emission associated with oxygen vacancies is absent for the sample calcinated at 450°C. This result confirms that higher calcination temperature reduces defects and increases crystallinity
Pengembangan Sensor Fluoresensi Berbasis Carbon Quantum Dots Dalam Deteksi Bakteri Escherichia Coli Bahtiar, Ayi; Sahara, Cici Citria
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 9, No 1 (2025)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v9i1.56631

Abstract

Carbon Quantum Dots (CQDs) adalah nanomaterial yang memiliki sifat fluoresensi yang unik. CQDs telah digunakan dalam berbagai aplikasi sensor, termasuk deteksi senyawa organik, logam berat, dan berbagai jenis mikroorganisme. Keunggulan CQDs terletak pada kemampuannya dalam berfluoresensi yang sangat sensitif dan spesifik ketika berinteraksi dengan target tertentu. Dalam penelitian ini, CQDs disintesis menggunakan metode hidotermal, dengan asam sitrat sebagai sumber karbon dan urea sebagai sumber dopan nitrogen. Doping nitrogen berfungsi untuk meningkatkan intensitas fluorosesnsi dari CQDs. Selanjutnya, CQDs hasil sintesis dikonjugasikan dengan peptida cecropin P1 dan digunakan untuk mendeteksi bakteri Escherichia coli. Bakteri Escherichia coli merupakan salah satu mikroorganisme patogen yang dapat menularkan berbagai penyakit bila masuk tubuh manusia melalui makanan dan minuman, salah satunya adalah diare. Hasil pengukuran spektrum fotoluminisensi menunjukkan bahwa CQDs mampu mendeteksi bakteri Escherichia coli, dimana intensitas flurosensi CQDs berkurang seiring meningkatnya penambahan volume bakteri yang diberikan. Konjugasi cecropin P1 pada CQDs mampu meningkatkan sensitivitas CQDs 2 (dua) kali lebih tinggi dalam mendeteksi bakteri Escherichia coli, dibandingkan dengan CQDs saja. Hasil penelitian ini menawarkan alternatif biosensor untuk mendeteksi bakteri Escherichia coli yang lebih sensitif dan cepat.
HYBRID SARIMA-LSTM MODEL FOR PREDICTING EROSION IN BUTTERFLY VALVE Dzulfiqar, Azhar Aiman; Chrisnanto, Julian Evan; Adiperdana, Budi
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 9, No 1 (2025)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v9i1.61007

Abstract

In the oil and gas industry, butterfly valves often undergo erosion due to being placed in fluid flow with high pressure and high temperature.  Erosion on butterfly valves can result in huge losses so it requires early anticipation. To overcome these problems, this research proposes a hybrid SARIMA-LSTM model to predict the mass erosion of butterfly valves under several opening conditions. The results show that the SARIMA-LSTM model has superior performance compared to the conventional LSTM and SARIMA model with MSE values at valves opening 20  – 90  reaching 1E-06; 1E-06; 6.2E-05; 2.34E-04; 1.35E-07; and 1E-06 respectively. The hybrid SARIMA-LSTM model successfully identifies the non-linear characteristics of the erosion data by identifying the residual value resulting from the difference between the SARIMA model prediction and the actual data. This study also reveals that the combination of SARIMA and LSTM models significantly affects the performance of the LSTM model. This study also successfully used the SARIMA-LSTM model to predict the erosion mass value for the next 30 time-steps. Through this study, it is known that the SARIMA-LSTM hybrid model has the possibility to be applied to the oil and gas industry to help the process of observing the erosion mass on the butterfly valve.  Keywords: butterfly valve, seasonal autoregressive integrated moving average (SARIMA), long-short term memory (LSTM), erosion mass, time-series forecasting. 

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