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INDONESIA
Jurnal Mahasiswa TEUB
Published by Universitas Brawijaya
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Core Subject : Education,
Education
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Articles 2,116 Documents
 175   176   177   178   179 
PENGARUH PENGENDALIAN TEKANAN GAS HIDROGEN (H2) SEBAGAI BAHAN BAKAR PROTON EXCHANGER MEMBRANE FUEL CELL (PEMFC) TERHADAP TEGANGAN KELUARAN Muhammad Nurhilal Hamdi; Waru Djuriatno; n/a Rahmadwati
Jurnal Mahasiswa TEUB Vol. 11 No. 5 (2023)
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Abstract

Fuel cell adalah sebuah alat elektrokimia yang dirancang untuk dapat memisahkan ion hidrogen dan oksigen dengan bantuan bahan katalis. Dari hasil reaksi kimia tersebut akan menghasilkan dua bentuk energi yaitu energi panas dan energi listrik. Namun,fuel cell merupakan alat yang mengandung senyawa kimia yang tidak dapat dikontrol pengeluaran maupun masukannya. Oleh karena itu, dibutuhkannya sebuah alat pengontrol berupa pengendali masukan tekanan gas hidrogen yang dapat untuk mengatur proses reaksi kimia dalam fuel cell itu bekerja agar penggunaan dan keluaran tegangan fuel cell dapat sesuai dengankebutuhan beban. Berdasarkan penelitian ini, hasil pengujian diperoleh bahwa pada fuel cell jenis PEM ini memiliki pengaruh apabila tekanan gas hidrogen jauh melebihi dari gas oksigen yang ada di udara sekitar katoda fuel cell maka tegangan keluaran fuel cell akan semakin rendah. Pada hasil pengujian tanpa pengendalian tekanan gas hidrogen diperoleh tegangan tertinggi pada tekanan 1 BAR dan terendah pada tekanan 1,7 BAR dengan variasi tanpa beban yaitu 51,1V & 5,01V; beban resistif 50W yaitu 64,3V & 4,64V; beban resistif 100W yaitu 66,7V & 4,33V; dan beban resistif 150W yaitu 61,2V & 4,29V. Pengendalian tekanan gas hidrogen dapat menghasilkan tegangan keluaran fuel cell yang sedikit lebih stabil pada beban resistif yang rendah (50W) yaitu dengan rata-rata 45,7V namun cenderung menurun apabila tidak dihubungkan dengan beban resistif apapun. Kata kunci— Fuel Cell, PEM, Pengendalian, Tekanan, Tegangan
DESAIN KONTROLER PIR DENGAN METODE POLE PLACEMENT PADA KONTROL MOTOR TRAKSI KERETA CEPAT Irtania Mariska Arafanie; Mochammad Rusli; Muhammad Aziz Muslim
Jurnal Mahasiswa TEUB Vol. 11 No. 5 (2023)
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Abstract

The study discusses the three-phase induction motor control response using the proportional-integralresonant control system (PIR) with the purpose of pressing the ripple on the torque output and stabilizing the output at speed. The study uses three-phase induction traction motor specifications of which one of its uses is on high-speed trains. The vector control method used is the dtc method with the svm technique. This study uses a pole placement method for determining the main parameters. Determination of the main parameter pi is determining the pole by comparing the characteristics of the polynomial with the system pole. When you get the desired pole, And it is also a Kp(speed) is 2.78 and Ki (speed) is -52.27. The value of the Kp ( torsi) is 23,661 and the Ki ( torsi) is -47,278 The value of Kp (flux) is 182,53 and Ki (flux) is - 13.3. Simulated testing uses simulink matlab software to show stability of the output speed which also reduces the ripple on the induction motor torque of three fas.3 fasa speed and motor torque with sinus wave load using pear controller generates a better response than with sinus wave load using pi controller. From the test result data that the steady state error value on the pear controller is less than 1.33 %, while the steady state error value on the greater pi controller is 22.48 %. Keywords: Three phase indution motor, PIR controller, Diret Torque Control (DTC), Pole Placement.
ANALISIS PENEMPATAN KAPASITOR OPTIMAL PADA PENYULANG SENTRAL GARDU INDUK RANGKAS DENGAN SOFTWARE ETAP 12.6 Muhamad Alif Fatur Rahman; Mahfudz Shidiq; Teguh Utomo
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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Abstract

Distance between power plant and load, growth in industrial sector, and population growth are several reason for the increase in voltage drop on a distribution electrical system. In some cases, voltage drop that happened sometimes can lead to the voltage drop beyond the specific limit which is 10%. One of the solutions we can use to prevent this is Optimum Capacitor Placement(OCP). OCP is a method which using the capacitor bank to supply the reactive power for the compensate for reactive power due to the load. In this research, the problem refers to Sentral Feeder of GI Rangkas which have 35 Distribution Transformer. Power flow analysis and OCP in this research will be done with the help of ETAP 12.6. in this research the optimation will be performed with maximum load. The result from Power flow analysis shows that at the maximum load, there is 10 buses which the voltage drop beyond the limit, hence OCP will be needed so the voltage drop can rise again beyond the limit of 10%. The OCP on ETAP 12.6. generates 4 bus candidates for the placement of capacitor bank, after 3 400 kVAR capacitor banks installed on STO bus, voltage drops reduces until the point where no buses on this system have voltage drop passing the limit. Power losses on the system also got reduced from 285 kW to 211 kW and 83 kVAR to 62 kVAR. Keywords—Voltage drop, Power flow analysis, Optimum Capacitor Placement(OCP), ETAP 12.6
INTEGRATED AIR STERILIZATION SYSTEM BASED ON PLASMA NANOBUBLE OZONE TECHNOLOGY WITH INTERNET OF THINGS Shafina Rifdhayanti Zein; Waru Djuriatno; Adharul Muttaqin
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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Bacteria and viruses are rapidly spreading around the world with a significant mortality rate of 7.8 per cent. The spread and transmission of bacteria and viruses in closed environments is generally riskier than in open environments. To reduce this, technology was needed that technology that can overcome these problems through the innovation of an IoT-integrated air sterilizer to show air conditions in real time that can be accessed via a smartphone. This technology adopts 3 stages of filtration The latest filtration stages are HEPA Filter, UV-C, and ozone. ozone can destroy viruses and bacteria to cause damage to the DNA and RNA of the virus. DNA and RNA through the destruction of spike proteins and the lipid layer. One method to produce ozone uses the high voltage plasma method. Ozone administration with a concentration of 0.06 ppm-0.1 ppm can reduce viral andbacterial activity up to 3-log reduction. However, the use of ozone above 0.08 ppm can cause health problems in humans. In addition, it was found that O2 with a movement speed of 1.25 m/s with a voltage of 4.5-5 kV will produce ozone with a concentration of 0.061 ppm which is effective and safe for humans. In addition to the use of ozone, the use of UV-C light is able to break down RNA and DNA in the SARS-CoV-2 virus with a minimum energy of 5.92x1011 eV per second in a unit area of cm2. To produce this amount of photon energy, UV-C light with a wavelength of 209 nm can be obtained. Therefore, this scientific paper discusses the analysis of ozone generation with high voltage plasma and the analysis of photon energy emission in UV-C light that is effective in inactivating viruses and bacteria. Keywords: Bacteria, Viruses , High Voltage Plasma, Ozone, UV-C Light
DESIGN BLACK SOLDIER FLY CAGES TO IMPROVE EGG PRODUCTIVITY BASED ON THE ON THE INTERNET OF THINGS Akhdan Fadhli Zaim; Onny Setyawati; Eka Maulana
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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Maggot or Black Soldier Fly larvae is one of the living things that can be used as waste treatment technology, especially in organic waste. Factors that greatly affect the growth of BSF maggots are the feed media provided and environmental conditions. The environmental conditions referred to here are temperature, sunlight, and humidity during the life cycle of the adult fly phase inthe cage. The number of eggs produced will affect how many maggots will be produced. Processing organic waste is very dependent on the number of maggots, the more waste, the more maggots are needed. This research will present the design of fly cages that have been modified into IoT-based cages and how the characteristics of IoT devices for black soldier fly cages. The purpose of this research is to maximize the productivity of black soldier flies through technology. The results showed that the IoT-based cage design will be installed with a hose nozzle spraying mist outside the cage and a grow light lamp. Characteristics of IoT Devices using ESP32 microcontroller, DHT22 sensor to measure temperature and humidity, and TSL2561 sensor to measure Light Intensity, Actuators controlled through relays are Pump12V and Growlight T10, then data will be sent via Firebase RTDB and application. Optimal environmental conditions can increase the productivity of Black Soldier Fly. Keywords: Black Soldier Fly, Light Intensity, Egg, Temperature, Humidity, TSL2561, DHT22.
PENGARUH BENDING PADA ANTENA MIKROSTRIP TERHADAP POLA RADIASI DAN POLARISASI DENGAN ORIENTASI BENDING ARAH SUMBU Y Faizal Reza; Muhammad Fauzan Edy Purnomo; Ali Mustofa
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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Antennas are expected to keep up with an era that requires flexible and wearable forms. In this use, it is possible to require bending of the microstrip antenna which changes the characteristics or parameters. In this research a microstrip antenna is designed with a 30-star ground plane patch in the form of a staircase working at a frequency of 2.4 GHz. Design and simulation were carried out in CST Studio Suite 2018 software and measurements were carried out with a Signal Generator and SpectrumAnalyzer. The simulation results show that bending causes yield degradation only in the parameters of the microstrip antenna, which is axial ratio that has an impact on polarization. And the measurement results show that there is degradation only in the axial ratio parameter which affects polarization. The smaller the bending radius that is done so that the antenna bends more, the way the antenna works will change. Keywords: Microstrip Antenna, Bending, Radiation Pattern, Polarization, Axial Ratio
RANCANG BANGUN DIGITAL PICKING SYSTEM BERBASIS ARDUINO MEGA 2560 PADA LINE PRODUKSI FINAL ASSEMBLY WIRING HARNESS Luki Handoko; Moch. Rusli; Bambang Siswojo
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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Abstract

In wiring harness production activities there are 4 production models and 82 production components, some of which have similarities and differences in components. This affects production activities that can trigger errors in the production of goods that are not in accordance with specifications which are generally caused by errors in taking production components. In September 2022 there were 358 wiring harness defective products, of which 132 defective products were caused by errors ininserting the wire into the connector. With this problem, it is necessary to design a method to reduce the yield of defective products. Digital picking system based on Arduino Mega 2560 is designed as a production material management method in the final assembly wiring harness line area. The results of the application of the digital picking system in October obtained 70 units of defective products. Defective products decreased from 358 units in September to 70 units in October. Index Terms—defect product, digital picking system, wiring harness.
PENGARUH BENDING DAN ANECHOIC CHAMBER PADA ANTENA MIKROSTRIP BINTANG 21 TERHADAP RETURN LOSS,VSWR DAN BANDWIDTH DENGAN ORIENTASI BENDING ARAH SUMBU Y Muhammad Fathan Romadhon; Muhammad Fauzan Edy Purnomo; Ali Mustofa
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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Abstract

Mikrostip antennas have various dimensions and placements that depend on needs. In some antennas, especially antennas placed on uneven surfaces, it can allow bending of the microstrip antenna which can affect the characteristics or parameters of the antenna. In this study, a microstrip antenna with a 21-star patch with a staircase shape on a groundpalne that worked at a frequency of 2.4 GHz. Design and simulation were carried out using CST studio suite 2021 software and measurement were carried out with nanoVNA SAA2. The simulation results show that bending causes degradation in the microstrip antenna parameters which include return loss and vswr. On the contrary, the measurement results show that there is an increase in performance on the return loss and vswr parameters. The results of the antenna measurements carried out in the anechoic chamber did not have a significant effect on the vswr parameters, return loss, bandwidth and impedance. Radiation pattern, polarization, gain, and other antenna parameters related to radiation in free space are the right parameters to be measured in the anechoic chamber. Keywords :Microstrip, Bending, Return Loss, VSWR, Bandwidth, Impedance, Anechoic Chamber
RANCANG BANGUN SISTEM SIRKULASI HYDROGEN PADA PEM (PROTON EXCHANGE MEMBRANE ) FUEL CELL Bernardino Yudika Soesanto; Waru Djuriatno; Eka Maulana
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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A fuel cell is a device that can generate electricity using environmentally friendly fuel. It produces electricity through a chemical reaction between hydrogen and oxygen, with water and electricity as the outputs. Due to its ability to produce water and electricity, fuel cells are considered environmentally friendly devices. However, fuel cells also have some drawbacks, such as the requirement for a balanced ratio of hydrogen and oxygen, the need for precise temperature control, and the disposal of unused hydrogen gas into the environment. This results in wastage of hydrogen gas, which could be recycled for further processing. A hydrogen circulation system is designed to recycle hydrogen gas, allowing it to be reused by the fuel cell. The research involves the use of an air filter to clean the hydrogen gas, ensuring that only gas is processed. Additionally, a recirculation pump is utilized to push the processed hydrogen gas back into the fuel cell's input. Keywords: Fuel Cell, Circulation System, Air Filter, Recirculation Pump
DESAIN MODIFIKASI TRANSFORMATOR PADA ISOLATED DC-DC BOOST CONVERTER DENGAN TOPOLOGI FULL BRIDGE MENGGUNAKAN APLIKASI FEMM Vinsensius Anggara Paramayuda; n/a Wijono; Waru Djuriatno
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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Abstract

DC-DC converters are an important component in modern power systems. This converter is used to convert DC voltage from one level to another, which is indispensable in various types of applications ranging from everyday electronic equipment to industrial use. By using an isolated DC-DC full bridge converter, a transformer is needed as a separator between the input and output parts as well as a voltage booster in the boost converter. However, when the primary current flowing is high, the ferrite core of the transformer is easier to saturate, so in this study the authors designed a transformer modification by dividing the transformer into two (split). In addition to reducing the risk of saturation due to current, with the split transformer, it also reduces the vertical dimensions of the transformer (more flat), so that heat dissipation is also getting better. With the two transformers divided, the two transformers are paralleled on the primary side and serialized on the secondary side, this causes the difference in current ratio in the transformer before and after the split. Before the split, the winding ratio was 3:10 while after the split it became 3:5. From simulations and calculations performed on FEMM and Octave, on the secondary AWG 24, the comparison of the simulated primary current with the AWG maximum current in the maximum winding before the split is 0.47%, while in the transformer after the split is 0.2%, on the secondary AWG 22, before the split is 0.9% and after the split is 0.59%, on the secondary AWG 20, before the split is 1.78% and after the split is 0.7%. For the resulting primary copper loss, it shows that the transformer after the split shows a smaller copper loss. For core loss in one transformer before the split is lower with an average of 15 Watts, while core loss in two transformers after the split is greater with an average of 28 Watts. Keywords: Transformer, split, current ratio, copper loss, core loss.

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