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INDONESIA
Jurnal Mahasiswa TEUB
Published by Universitas Brawijaya
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Core Subject : Education,
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Articles 25 Documents
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Search results for , issue "Vol. 12 No. 1 (2024)" : 25 Documents clear
PERANCANGAN PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO COBAN JAHE PADA ASPEK TEKNIK DAN SISTEM KELISTRIKAN Wardani, Alya Kusuma; Utomo, Teguh; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Pembangkit Listrik Tenaga Mikro Hidro (PTLMH) merupakan pembangkit listrik yang memanfaatkan aliran air yang mengalir secara kontinyu dengan kapasitas daya terbangkit di antara 5 kW-100 kW. Di Indonesia, masih banyak aliran air seperti sungai, air terjun, maupun dam yang belum dimanfaatkan secara maksimal, salah satunya air terjun Coban Jahe. Coban Jahe terletak di Dusun Krajan, Desa Taji, Kec. Jabung, Kabupaten Malang. Maka dari itu, dilakukan perancangan PLTMH Coban Jahe untuk memanfatkan sumber daya air yang ada. Pada penelitian ini, pengukuran debit air menggunakan metode apung dan pengukuran tinggi jatuh air menggunakan metode manual dengan patok kayu dan tali rafia. Dari pengukuran tersebut, didapatkan debit air sebesar 0,7465 m3/s dan tinggi jatuh air (head) efektif sebesar 4,1514 meter. Debit air dan head yang terukur dijadikan dasar penentuan desain komponenkomponen instalasi yang meliputi bendung, intake, saluran pembawa, bak penenang, pipa pesat, turbin air, generator, dan sistem kontrol beban serta sistem kelistrikan yang meliputi instalasi listrik pada rumah pembangkit dan pemilihan kWh meter. Berdasarkan debit air dan head yang terukur, turbin air yang dipilih yakni turbin Crossflow. Potensi daya yang dapat dibangkitkan oleh PLTMH Coban Jahe yakni sebesar 14,92 kW. Dengan jumlah daya tersebut, generator yang dipilih yakni generator sinkron 3 fasa brushless excitation dengan kapasitas 25 kVA dan ELC dengan kapasitas 30 kW. Kata kunci: PLTMH, debit air, turbin air Crossflow, generator, AutoCAD
ANALISIS NILAI SETTING POINT RELE DIFERENSIAL SEBAGAI PROTEKSI TRANSFORMATOR GT UNIT 1 DI PT PLN NUSANTARA POWER UP PAITON Fatahillah, Muhammad; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Power plants are an important component in a country's electricity system which is responsible for producing large amounts of electrical energy to meet the needs of society, industry and other sectors. There are many types of power plants in Indonesia, one of which is the Steam Power Plant (PLTU). In a PLTU there are electrical components that must be safe when a disturbance occurs. The power transformer is one of the vital electrical components in a PLTU which requires a good protection system so that it can operate optimally. PT PLN Nusantara Power UP Paiton Unit 1 has many power transformers installed, one type of which is the GT Transformer. This transformer works to increase the voltage from 18.25 kV to a voltage of 500 kV. On the GT transformer, there is also one of the protection relays installed, namely the differential relay. However, the existence of the installed differential relay needs to be evaluated, namely not only with mathematical calculations but also with ETAP simulations. In this research, mathematical analysis was carried out by calculating the setting point value and slope range of the differential relay on the GT transformer. After that, a simulation was carried out using ETAP. Based on the results of mathematical analysis and simulation, it shows the consistency of short circuit current values, namely with an average error difference of 1,25% for the primary side and 1.183% for the secondary side. Meanwhile, there are differences in the slope values determined by PLN Nusantara Power and the results of mathematical calculations, namely 9.06% for slope 1 and 18.138% for slope 2 based on mathematical calculations and 20% for slope 1 and 80% for slope 2 based on party settings. PLN Nusantara Power. This difference is caused by consideration of the potential for saturation in the Current Transformer due to excessive loading on the secondary side. This CT saturation condition cannot be detected as a disturbance, so it must be located in the no-trip area. Then, the setting current value based on mathematical calculations and PLN Nusantara Power's settings is also not at 0 A. This is due to consideration of the differential relay sensitivity of 30% which causes the setting current value to be around 0.3 A. Finally, in the curve plot Differential relay characteristics, the average fault point is in the trip area except for 3 phase and secondary side interphase faults which are above the trip area or called instantaneous area. The location of the fault point in this instantaneous area is influenced by the large 3-phase short circuit current value on the GITET side so that it accumulates on the 500 kV bus (secondary side). Keywords— Power Transformer, Differential Relay, Setting Point, ETAP, Characteristic Curve
EVALUASI KELAYAKAN KINERJA PEMUTUS TENAGA (PMT) 70 kV PADA BAY ARJAWINANGUN 1 DI GARDU INDUK SUNYARAGI Yuka, Helmi Dwi; Utomo, Teguh; Dhofir, Moch.
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Power Breakers (PMT) are one of the important equipment in the electricity system at the main substation. Damage to the PMT is very dangerous and disrupts the operation of the system, so periodic testing must be carried out to ensure that the PMT is suitable for operation. Tests on PMT are insulation resistance testing, contact resistance testing, grounding resistance testing, contact simultaneity testing, and SF6 gas testing. This research aims to evaluate whether the PMT in the Arjawinangun 1 bay at the Sunyaragi Main Substation is still effective and safe to operate, namely by using analysis of a set of data taken based on the values produced by routine testing or maintenance. This research was carried out by comparing the test results obtained with the standard values for each test. The insulation resistance test results obtained for each phase have values above 70 MΩ. The results of contact resistance testing carried out on each phase have values below 50 µΩ. The results of the grounding resistance test on each phase have a value below 1Ω. In the simultaneity test, the delta time calculation results obtained for both open and close times were each below 10 ms. The results of SF6 gas purity testing have a purity value above 99%. Based on the results of testing for insulation resistance, contact resistance, grounding resistance, contact simultaneity and SF6 gas purity, the PMT installed in Arjawinangun 1 bay is still in a safe condition and suitable for operation because it complies with standards. Keywords—Power Breaker (PMT), Insulation Resistance, Contact Resistance, Grounding Resistance, Contact Simultaneity, SF6 Gas Purity
UPAYA PENGHEMATAN KONSUMSI ENERGI LISTRIK DI PT. KAWASAN INDUSTRI MAKASSAR MELALUI WALK-THROUGH AUDIT METHOD Alfarizy, Muhammad Mahdiy; Wibawa, Unggul; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Energy security plays an important role in supporting national development. To maintain energy security, energy conservation is carried out by reducing energy use in producing goods or services. To analyze energy use is conduct an energy audit. This research aims to obtain the Energy Use Intensity (EUI), electrical energy utilization patterns, and energy saving opportunities in the Head Office and Waste Water Treatment Plant (WWTP) PT. Kawasan. Industri Makassar (PT. KIMA), using WalkThrough Audit method. The calculation of the EUI refers to the building area and electrical energy consumption in 2022-2023. The electrical energy utilization pattern focuses on the daily load of electrical energy consumption, such as measuring the level of light illuminance (lux), calculating the electric power of lamps, calculating the Energy Efficiency Ratio (EER) for the Air Conditioner (AC), and calculate the appropriate AC capacity for each room. The results of the EUI value calculation show that the criteria are very efficient in the Head Office in 2022-2023 and very efficient in the WWTP office in 2022, which decreases to efficient in 2023. The lux level in 76.47% of the rooms in the Head Office and 70% of the rooms in the WWTP Office is below the SNI 6197:2020 standard. The type of AC installed is energy efficient, but the AC capacity is too big in that 35% of the rooms in the Head Office and 57% of the rooms in the WWTP Office. The results of the IKE analysis show a small influence on energy saving opportunities. Meanwhile, the analysis of electrical energy utilization patterns shows a large influence on providing energy saving opportunities. Keyword : Energy Audit, Energy Use Intensity (EUI), Energy Efficiency Ratio (EER)
PERANCANGAN SISTEM STERILISASI ALAT KEDOKTERAN GIGI DENGAN METODE IONISASI Linoval , M. Dilan; Maulana, Eka; Djuriatno, Waru
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Health problems in Indonesia are still a concern due to the large number of deaths due to cross-infection diseases. In dentistry, the risk of cross infection often occurs because the use of dental instruments that are exposed to saliva is less than optimal in the sterilization process. Currently, the most frequently used sterilization tool in dentistry is the autoclave. Routine autoclave sterilization is usually operated at a steam pressure of 15 lb/in2. At this pressure, the temperature becomes 121oC. the time required at this temperature is 15-20 minutes (Volk and Wheeler, 1993). However, autoclaves are considered less effective because they have several disadvantages, such as being expensive, using high power, and requiring a lot of time to use. Therefore, it is necessary to have a solution to overcome the above problems. A research was carried out on designing a sterilization system for dental instruments using the ionizer method in order to determine the level of efficiency of this method in the process of sterilizing dental instruments. This sterilizer utilizes high voltage in the ion generator circuit to produce ions. This research was carried out by testing the working components and using an oscilloscope to determine the working parameters produced in the ionization circuit as well as testing in the microbiology laboratory to determine the effectiveness of the system in decontaminating bacteria. The results of this research are that the DHT22 sensor has an accuracy of 99.71% in detecting the temperature of the sterilization room and it was found that within an ion irradiation time of 300 seconds the number of bacteria was reduced by 97.32%. Keywords: ionization, dental tools, Sterilization
ANALISIS UJI KAPASITAS DAN EFISIENSI BATERAI 220 VDC MELALUI PROSES DISCHARGING PADA PLTGU BLOK 2 UP MUARA KARANG Nisa, Rizqa Ulya Fakhrun; Wibawa, Unggul; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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PLTGU Muara Karang merupakan salah satu pembangkit listrik yang bertugas menyuplai wilayah Jakarta dan beberapa objek vital negara. Blackout menjadi salah satu permasalahan besar dalam pembangkitan listrik karena dapat mengganggu aktivitas masyarakat. Blackout yang terjadi karena trip pada peralatan pembangkit. Untuk mencegah blackout, PLTGU mengandalkan dua sistem darurat sebagai suplai ketika terjadi trip. Salah satunya adalah baterai sebagai suplai darurat peralatan DC. Kondisi baterai harus dijaga dengan melakukan pemeliharaan rutin melalui pengukuran tegangan, suhu, dan berat jenis. Kondisi dan keandalan baterai juga dapat ditentukan berdasarkan besar kapasitas dan efisiensinya. Kapasitas dan efisiensi dapat diketahui dengan uji kapasitas melalui proses charge dan discharge. Penelitian ini bertujuan untuk mengetahui kondisi suhu dan tegangan serta menghitung kapasitas dan efisiensi baterai. Metode penelitian ini adalah metode kuantitatif dengan teknik pengambilan data melalui dokumentasi. Data yang digunakan adalah data sekunder suhu dan tegangan baterai GT 2.2 pada saat sebelum, selama, dan sesudah pengosongan. Objek penelitian ini adalah 1 bank baterai (104 sel baterai) jenis lead acid pada GT 2.2 PLTGU Blok 2 UP Muara Karang. Hasil penelitian didapatkan (1) baterai sebelum pengosongan dalam kondisi kurang baik sehingga perlu pengisian kembali, (2) suhu tiaptiap sel baterai selama proses pengosongan terus meningkat tidak beraturan, (3) tegangan tiap-tiap sel baterai selama proses pengosongan mengalami penurunan secara linier, (4) kapasitas dan efisiensi baterai memberikan pola hubungan berbanding lurus. Kata kunci– Baterai Lead Acid, Pengosongan, Uji Kapasitas
PENGARUH SUDUT INKLINASI DAN JENIS BAHAN TERHADAP DAYA KELUARAN DAN EFISIENSI MODUL SURYA SKALA MIKRO DENGAN DUA REFLEKTOR Nurhakiki, Mauludiya Annisa; Wibawa, Unggul; Hasanah, Rini Nur
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Two sided reflectors are reflectors that face each other with the function of focusing sunlight so that they fall directly on the solar module. The usage of two reflector units is intended to make the output power and efficiency of the module higher than if using a single-sided reflector but not to cover the incident light area like using a three or four-sided reflectors. The inclination angles used were 30˚, 45˚, 60˚, 75˚, and 90˚ with reflector materials such as glass mirror, aluminum, and HVS paper. The results showed that the initial peak power and efficiency were 14.33W and 6.62%. The peak power and efficiency using a mirror reflector were 19.27W and 8.97% when the inclination angle was 60˚. The peak power and efficiency using the aluminum reflector were 18.59W and 8.67% when the inclination angle was 60˚. The peak power and efficiency using the HVS reflector were 15.23W and 7.10% at an inclination angle of 60˚. In addition, temperature and load levels relationship curves were also obtained for the operation of the 20WP micro-scale solar module. It can be deducted that the addition of double-sided mirror and aluminum reflectors with inclination angle of 60˚ increases the output power and efficiency of the solar module significantly and no special pattern is formed between temperature and load levels of the circuit for the various treatments tested. Keyword : solar module, inclination angle, reflector, output power, efficiency
PENGARUH PENAMBAHAN CAMPURAN ARANG LIMBAH KULIT PISANG DAN FLY ASH TERHADAP PENURUNAN NILAI RESISTANSI PERTANAHAN ROD GROUNDING Jagad, Mohammad Wahyu; Dhofir, Moch.; Utomo, Teguh
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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One of the efforts that can be made to reduce the value of soil resistance is by providing soil treatment. The most ideal soil treatment is done in the nearest area to the grounding electrode. Soil treatment can be carried out by adding other substances to the soil to engineer soil conditions and reduce the value of soil resistance. This study aims to examine the effect of a mixture of banana peel waste charcoal and fly ash on the reduction of soil resistance values. Banana peel charcoal contains activated carbon that can maintain soil moisture, while fly ash is a residue from coal combustion that contains electrolyte compounds. The homogeneously engineered mixture of banana peel waste charcoal and fly ash has a resistivity of 385.76 Ω-cm. Testing was conducted with three variations of the mixture composition: banana peel charcoal 75% and fly ash 25%, banana peel charcoal 50% and fly ash 50%, and banana peel charcoal 25% and fly ash 75%, with a constant insertion depth of 0.7 meters and a diameter of 0.15 meters. The first mixture successfully reduced soil resistance by 46.1 Ω, or a reduction of 52.77%. The second mixture successfully reduced soil resistance by 40.27 Ω, or a reduction of 46.57%. The third mixture successfully reduced soil resistance by 27.3 Ω, or a reduction of 31.34%. Moisture engineering was carried out by adding 300 ml of water, resulting in a reductionranging from 9.33% to 23.90%. Keywords: Banana peel charcoal, Fly ash, Soil resistance, Soil resistivity, Soil treatment,
SISTEM MONITORING UDARA HASIL PEMBAKARAN SAMPAH Fathonni, Mochammad Cyrilla; Maulana, Eka; Aswin, Muhammad
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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Waste incineration is one of the solutions to reduce the amount of waste. This combustion can be useful for breaking down solid waste, but the process of burning waste can produce harmful residual gas emissions. So in this study, a trial was conducted using incinerator technology, an incinerator is a device that functions to burn garbage or waste in solid form and is operated by utilizing combustion technology at a certain temperature. This research was conducted to present a solution by measuring and filteringthe remnants of waste combustion gas emissions which are very dangerous for the human respiratory system. From the description of these problems, a tool is needed that can measure and filter the remnants of waste combustion emission gas. So one way that can be done is by monitoring how bad the levels of CO and CO2 gas contained in the remaining combustion and then binding or filtering these gases using precipitator technology so that the air that will come out of the remains of dangerous combustion that can disturb humans can be reduced. Keywords: Waste incineration, incinerators, precipitators, CO gas, and CO2 gas.
IMPLEMENTASI FUZZY LOGIC CONTROL DENGAN METODE MAMDANI UNTUK PENGONTROLAN TEMPERATUR HEATING PAD PADA WEARPACK Suswanto, Althaf Juldha; Rusli, Moch.; Sari, Sapriesty Nainy
Jurnal Mahasiswa TEUB Vol. 12 No. 1 (2024)
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The lack of awareness of workers in the importance of occupational safety and health (K3) makes the high risk of work accidents in Indonesia. Especially in the highlands, workers have a risk of developing hypothermia due to extreme temperatures. The purpose of this research in designing a wearpack that can provide external heat to the user's body using a heating pad that can control the temperature automatically using fuzzy logic control mamdani method which will be processed using ESP-32 Dev Kit as a microcontroller. Based on the tests carried out, it can be concluded that the design of the device made is in accordance with the expected specifications where the device is able to change the temperature on the heating pad based on the output of the fuzzy logic control calculation in the form of PWM. In testing of a temperature input of 27°C and a bpm of 61, the PWM output on the L289N driver is obtained with a time constant of 1,63 seconds and a steady state gain of 5,82 %/V with an output voltage of 2.54 volts. It can be concluded that the tool is able to issue PWM output in accordance with the input of the two sensors after going through fuzzy logic calculations. Keywords: ESP-32 Dev Kit, PWM, Heating Pad, Fuzzy Logic, Mamdani

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