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Yunita Djamalu
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INDONESIA
Journal Of Renewable Energy Engineering
Published by Universitas Negeri Gorontalo
ISSN : 29861063     EISSN : 2988554X     DOI : 10.56190
Core Subject : Science, Engineering,
Energy Engineering
Journal Of Renewable Energy Engineering (JREE) is a peer-reviewed journal published twice a year (April and October) by the Vocational Program of the State University of Gorontalo. The Vocational Journal of Science and Technology provides direct open access to its content. The aim of this journal is to provide the expression of ideas, as well as places for knowledge fields that can understand applied science and technology issues and knowledge, with a new space of journals covering the fields of science and technology. applied science and technology research including Mathematics, Physics, Technology, and Informatics
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 35 Documents
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SIMULATOR BOILER HYBRID SEBAGAI FUNGSI PENGERING DAN PENGOLAH LIMBAH MEDIS JENIS PLASTIK Liputo, Burhan; Djamalu, Yunita; Umela, Syaiful; Gobel, Leni; Djafar, Romi
Journal Of Renewable Energy Engineering Vol. 2 No. 1 (2024): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i1.23

Abstract

The hybrid boiler simulator is a simulation machine designed with two working functions, namely as a medical waste processing function and as a drying cabinet function. As a medical waste processor, this machine will focus on plastic medical waste, and as a dryer function, this machine will be a clothes-drying tool or cabinet. So based on the multifunctionality of the machine, this system has hybrid working characteristics. Hybrid boiler simulators can be a solution, providing the function of processing plastic medical waste and providing the advantageous function of economical and environmentally friendly drying. Therefore, this research aims to create a hybrid boiler simulator that can be used as a plastic medical waste processing machine and also as a clothes drying machine. The hybrid boiler system is designed by applying the concept of appropriate technology so that its implementation can be done easily and practically. The research implementation method is a classification of plastic medical waste, concept design, and analysis, construction design of a hybrid boiler system combined with an incinerator for burning medical waste, system function testing, and observation of test data. The focus of his research is the heat of burning plastic waste, heat radiation, circulators, and flow control systems as well as the characteristics of the results of burning plastic waste. The results of this research are that the hybrid boiler simulator machine can function as an incinerator machine to burn plastic medical waste and function as a clothes dryer; The function of the incinerator in this machine is only through two processes, namely the process of burning plastic medical waste raw materials and the process of burning carbon gas or smoke produced from the process of burning raw materials; the sumulator machine is not yet equipped with a fogging process for the function of smoke cleaning filter and fogging control; the hybrid boiler simulator machine works on the principle of automatic control based on temperature detection using a temperature sensor; The combustion temperature in the boiler machine can be controlled at a standard of 830 °C and the drying room temperature can be set at a room temperature of 50 – 150 °C.
KARAKTERISTIK TEGANGAN TEMBUS MINYAK TRAFO SHELL DIALA B MENGGUNAKAN MATERIAL ELEKTRODA BERBAHAN STAINLES STEEL, KUNINGAN, TEMBAGA DAN ALUMUNIUM Amali, Kamil; Mohamad, Yasin; Yusuf, Taufik Ismail; Ntobuo, Nova Elysia
Journal Of Renewable Energy Engineering Vol. 2 No. 1 (2024): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i1.24

Abstract

Transformer oil insulation breakdown voltage testing is usually carried out at high AC voltage using the SPLN 49-1 1982 standard. The electrodes used are hemispherical electrodes with a distance between the electrodes of 2.5mm. The breakdown voltage value of transformer oil insulation that meets the standards according to SPLN 49-1 of 1982 is 30 kV/2.5mm. In this research, a new Shell Diala B brand transformer oil insulation breakdown voltage test was carried out using the SPLN 49-1 1982 testing standard. The novelty of this research is using various electrode shapes and different electrode materials to test the breakdown voltage of the transformer oil's liquid insulation. The method used in this research is an experimental method where the test is adapted to the SPLN 49-1 standard of 1982. The electrodes used are ball, needle, and plate electrodes. Based on test results at a distance between electrodes of 2.5 mm, it was found that the breakdown voltage characteristics of stainless steel, brass, copper, and aluminum electrode materials varied and did not meet the SPLN 49-1 1982 standard, namely 30 kV/2.5 mm.
STUDI PEMANFAATAN LIMBAH BAMBU DAN TEMPURUNG KELAPA DALAM PEMBUATAN BIOBRIKET MENJADI SUMBER ENERGI ALTERNATIF Saputra, Guntur Hadi; Ilham, Jumiati; Mohamad, Yasin
Journal Of Renewable Energy Engineering Vol. 2 No. 1 (2024): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i1.25

Abstract

The use of fossil fuels has resulted in the emission of greenhouse gases which can trigger global warming. In addition, fossil energy reserves that continue to decrease also raise concerns regarding aspects of their reselience and sustainability. Therefore, new and renewble energy must be developed immediately. The use of biomass as an alternative fuel for Steam Power Plant (PLTU) is in line with Indonesia’s efforts towards net zero emission in the future. In addition to increasing the contribution of renewable energy to the national energy mix, cofiring will also have a positive impact on the development of the circular economy as it can open up employment and business opportunities in the biomass sector, especially those based on garbage and waste. This research aims to determine the value of moisture content, heating value, combustion rate, and electrical energy produced from bamboo twigs and coconut shell waste with different composition variation. The method used in this research is an experimental method in which a bomb calorimeter is used to determine the heating, and a biomass stove is used to determine the combustion rate. The research finding reveals that the best samples for utilizing bamboo and coconut shell waste in the production of bio-briquettes as an alternative energy source are the variety of 200 grams of shell charcoal and 10 grams sago adhesive (sample 9). It is the best sample due to it has moisture content value of 6.38%, heating value of 5663.9 cal/gram, combustion rate is 0.227 gram/minute, and the electrical energy generated by converting the heating value to kWh is 6.5857 kWh/gram. In reference to SNI 01-6235-2000, the moisture content should not be more than 8%, and the minimum heating value is 5000 cal/g.
RANCANG BANGUN SISTEM MONITORING STASIUN PENGISIAN LISTRIK UMUM (SPLU) HYBRID BERBASIS IOT DI SMKN 2 KOTA BEKASI Abdurrahman, Naufal; Jaenul, Ariep; Vresdian, Devan Junesco
Journal Of Renewable Energy Engineering Vol. 2 No. 1 (2024): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i1.27

Abstract

  This research is motivated by the development of electric vehicles in Indonesia which is regulated in Presidential Regulation Number 55 of 2019 which encourages the use of electric vehicles. Therefore, the development of electric vehicles began to increase every year. Along with the development of electric vehicles, it must also be followed by the development of charging stations. This research focuses more on developing a Hybrid public electric charging station (SPLU) monitoring system to create a Hybrid SPLU monitoring system that can be accessed easily anytime and anywhere in real-time and is IoT-based. For the Hybrid SPLU monitoring system to work well, the data results from sensor readings can be monitored in real-time and IoT-based. Then the data from this study has been compared (calibration) with existing measuring instruments with the average error of each sensor being no more than 5% and the Mean Absolute Percentage Error (MAPE) not more than 10%. From the existing provisions, if the MAPE value is <10%, the data can be said to be very accurate. So it can be concluded that this research can be said to be successful because it has fulfilled the initial objectives of this research.
PENGEMBANGAN ARDUINO DATA LOGGER MENGGUNAKAN TDR H3CR UNTUK SIMULATOR PASANG SURUT Anugrah, Maulana; Kusuma, Hollanda Arief; Putra, Riandra
Journal Of Renewable Energy Engineering Vol. 2 No. 1 (2024): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i1.28

Abstract

Tides, crucial natural phenomena, significantly impact various aspects of life. Recognizing their importance, this study presents the development of a tidal simulator leveraging Arduino data logging and TDR H3CR technology. The simulator aims to mimic tidal processes, crucial for educational and research purposes. Traditional methods of acquiring tidal data are time-consuming and expensive. Thus, a simulator proves advantageous in reducing research time and costs. At Raja Ali Haji Maritime University, a tidal simulation model exists but with manual operation and limited data capture capabilities. To address these limitations, this study designed a new simulator utilizing H3CR, DC Water Pump, and DC Selenoid Valve for automated tidal circulation. The research method involved system design, component integration, and laboratory experiments. Calibration of components like the ultrasonic sensor HC-SR04 ensured accurate data collection. The overall system experiment validated the simulator's functionality, demonstrating its ability to replicate tidal processes effectively. Results indicated that the simulator produced tidal patterns resembling sinusoidal waves, with slight noise attributed to sensor limitations. The designed simulator serves as an efficient learning tool for understanding tidal phenomena, exhibiting comparable results to natural tidal data. This study contributes to the advancement of tidal simulation technology, offering a cost-effective and accessible solution for educational and research purposes.
Relay OCR dan GFR ANALISIS KINERJA OVER CURRENT RELAY (OCR) & GROUND FAULT RELAY (GFR) PADA PENYULANG 20KV GB5 ULTG GORONTALO MENGGUNAKAN ALAT UJI CMC 356 Amali, Kamil; Damogalad, Muhamad Rifai; Yusuf, Taufik Ismail; Harun, Ervan Hasan; Tolango, Ade Irawaty
Journal Of Renewable Energy Engineering Vol. 2 No. 1 (2024): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i1.31

Abstract

This research was conducted to test the reliability of the performance of the OCR-GFR relay whether it complies with the settings or not during field testing and to find out a comparative analysis of the performance of theoretical calculations with the results of field testing using the CMC 356 test equipment. This research uses a descriptive method. This research aims to determine whether the performance of the OCR–GFR relay that is being used is still good performance or suitable for use. And the tests carried out are pick up and drop off tests and characteristic tests. The results of the OCR pick-up and drop-off relay test were 1.2 A and the drop-off was 1.134 A. Meanwhile, for the GFR relay the pickup relay was 0.20 A and the drop-off was 185.0 mA. The results of the pickup and drop-off tests can conclude that the relay works according to its settings. Meanwhile, for field testing, the OCR relay characteristics at 1.5 times the setting current are 3.627 s and the theoretical calculation results are 3.697 s. For the GFR relay, the field test results obtained were 1.5 times the setting current, namely 1.981 s, and the theoretical calculation results were 1.977 s. This means that the test results are close to the calculated values. This shows that the Micom P142 OCR/GFR Relay tested is still in good performance.
PERSAMAAN GOMPERTZ TERMODIFIKASI UNTUK MENENTUKAN PERTUMBUHAN BAKTERI METANOGEN PADA PRODUKSI BIOGAS Werena, Rosalia Dwi; Wahyuningtyas, Dewi; Halim, Lenny; Syabriana, Maliya
Journal Of Renewable Energy Engineering Vol. 2 No. 1 (2024): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i1.32

Abstract

Pertumbuhan mikroorganisme didefinisikan sebagai fase kecepatan pertumbuhan tertentu, yang dimulai pada titik nol dan meningkat sampai nilai maksimum (μm) dalam jangka waktu tertentu. Pada fase akhir, kecepatan pertumbuhan menurun dan akhirnya berhenti, sehingga nilai asymptote (A) dapat dihitung.
PENGONTROLAN ENERGI PANAS DAN KELEMBABAN MENGGUNAKAN SENSOR DHT22 DAN ESP32 PADA PROSES FERMENTASI TEMPE GEMBUS Musa, Wahab; Hidayat, Ikhsan; Alam, Saiful; Asmara, Bambang Panji; Tolago, Ade Irawati
Journal Of Renewable Energy Engineering Vol. 2 No. 1 (2024): Journal Of Renewable Energy Engineering (April)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i1.33

Abstract

The fermentation process of tempe embus with conventional methods is highly dependent on weather conditions and requires heat energy (temperature) 25°C - 35°C within 36 - 48 hours. This research aims to stabilize the heat energy and reduce the fermentation process time to get quality tempeh production results in a short time. The research method used is the experimental method by making an automatic temperature and humidity controller and testing its performance. This tool works using the DHT22 sensor and ESP32 microcontroller as the control center. Temperature automation is done with two conditions that are used to regulate lights and fans. If the fermentation temperature is lower than the setpoint, the lower light and upper light turn on, if the temperature rises, the upper light turns off and the fan turns on, to keep the temperature within the pre-set setpoint value. This research shows that the temperature and humidity control device operates stably in the temperature range of 32°C to 35°C. At these temperature conditions, the fermentation process runs stably. At that temperature condition, the fermentation process of tempe embus lasts 16 hours, with testing of color, taste, and smell for the best quality category Tempe.
PENGARUH KECERAHAN TERHADAP ENERGI LISTRIK YANG DIHASILKAN OLEH PANEL SURYA Amin, Aditya Saputra; Ilham, Jumiati; Kamil Amali, Lanto M.
Journal Of Renewable Energy Engineering Vol. 2 No. 2 (2024): Journal Of Renewable Energy Engineering (Oktober)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i2.39

Abstract

The reduction in fossil energy production, particularly petroleum, along with the global commitment to reducing greenhouse gas emissions, encourages the government to continuously improve the role of new and renewable energy to maintain energy security and independence. Renewable energy is a” source of energy derived from nature that can be used freely, continuously renewed, and unlimited, such as“solar energy. This study aims to analyze the performance of solar panels” in terms of battery charging and discharging duration, current, voltage, and power under sunny and cloudy conditions. The research method was conducted directly in the field, using a solar panel with a capacity of 10WP (Watt Peak) as the study object. The results showed that the performance of solar panels under sunny conditions achieved the highest average power of 4.81 Watts and the fastest battery charging time of 6 hours. Under cloudy conditions, the average power obtained was 4.34 Watts, and the battery charging time was 6 hours and 20 minutes. The battery discharging duration for a 5-watt lamp was 16 hours and 8 minutes, for a 10-watt lamp, it was 8 hours and 4 minutes, and for a 15-watt lamp, it was 5 hours and 6 minutes.
MONITORING SISTEM PROTEKSI KEBAKARAN AKTIF PADA PLTU ANGGREK 2 X 25 MW Pido, Rifaldo; Boli, Rahmad Hidayat; Rifal, Mohamad
Journal Of Renewable Energy Engineering Vol. 2 No. 2 (2024): Journal Of Renewable Energy Engineering (Oktober)
Publisher : Program Vokasi-Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56190/jree.v2i2.42

Abstract

The Anggrek Unit Steam Power Plant (PLTU) is a power generation facility whose construction began in 2007 and began operating in 2019 with a capacity of 2 x 25 MW. Since its inauguration, PLTU Anggrek has become one of the main sources of electricity distribution in Gorontalo Province, so the frequency of power outages in the area has now decreased significantly. The water supply system for fire fighting uses BSP pipes. In this research, the aim is to determine the active fire protection system. This research was carried out with a qualitative descriptive design with data collection: observation and interviews. The assessment of the results of existing suitability will be assessed using descriptive percentage calculations. The research results show that of the 7 variables discussed, the average value for the level of fulfillment is 98.57%. Based on the level of fire audit assessment that meets the requirements of Indonesian national standards and international standards, the results are in the Good criteria or have met the requirements.

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