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Waru Djuriatno
Departemen Teknik Elektro, Universitas Brawijaya
Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering

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PENGENDALI ALIRAN GAS HIDROGEN PADA MASUKAN DAN KELUARAN PROTON EXCHANGE MEMBRANE FUEL CELL DENGAN BEBAN DINAMIS Muhammad Faqih Alfalah; Waru Djuriatno; Tri Nurwati
Jurnal Mahasiswa TEUB Vol. 11 No. 5 (2023)
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Fuel cells are a source of environmentally friendly energy materials because they use hydrogen gas as their main ingredient. Fuel cells themselves have various types and this research uses a type of Proton Exchange Membrane Fuel Cell which uses polymer materials as its main component to produce electrical energy. The purpose of this study is to control the flow of hydrogen gas into the fuel cell to determine the flow and volume of the hydrogen gas used and to see the output of the fuel cell in the form of voltage, load voltage and current which will later be known for the efficiency and power of the fuel cell. . This test was carried outby designing a test circuit to regulate hydrogen gas by controlling the use of valves and flow sensors controlled by Arduino Uno by looking at two different conditions, namely condition 1 (maximum hydrogen gas pressure (1.5 bar)) and condition 2 (stable hydrogen gas (1.1 – 1.3 bar)). In this test, the voltage, load voltage, volume, flow and current are recorded. Based on the test results in condition 1, the value of voltage, volume and flow is higher than condition 2 and for load voltage, the more load used, the lower the value, while the more load used, the higher the value. Based on the results of the tests that have been carried out,the calculations were carried out and it was concluded that the power is directly proportional to the load used and the fuel cell has an efficiency of 58-60%. Keywords: Fuel Cell, PEMFC, Hydrogen Gas, pressure condition, voltage
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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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
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
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.
ANALISIS PENGARUH SUHU TERHADAP PERFORMANSI OPEN CATHODE PROTON-EXCHANGE MEMBRANE FUEL CELL (OCPEMFC) Teofilus R.M. Silalahi; Waru Djuriatno; Eka Maulana
Jurnal Mahasiswa TEUB Vol. 11 No. 6 (2023)
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Abstract

The Open Cathode Proton-Exchange Membrane Fuel Cell (OCPEMFC) is a promising technology for generating clean and efficient electrical energy. However, the performance of OCPEMFC is influenced by various factors, including the operational temperature range. The performance also depends on the chemical reactions occurring between hydrogen and oxygen with water, with electricity and heat produced as reaction products. In the reaction process of OCPEMFC, the rate and quality of oxygen supply to the cathode play a crucial role in enhancing the performance of OCPEMFC. This research aims to analyze the influence of temperature on OCPEMFC performance. OCPEMFC is a technology capable of producing environmentally friendly and efficient electrical energy. However, the performance of OCPEMFC can be affected by the operational temperature range. This study utilizes a system specifically designed to support temperature measurements using the DS18B20 sensor. The use of a blower in analyzing the temperature's effecton OCPEMFC performance is one solution to maintain the operational temperature range of OCPEMFC, which also affects the oxygen flow rate to the cathode. The application of a blower with Pulse Width Modulation (PWM) control is a solution to maintain the operational temperature range of OCPEMFC. The PWM value on the blower directly influences the generated airflow rate. PWM control allows adjusting the airflow to maintain the desired operational temperature. By increasing the blower speed, the oxygen flow rate can be enhanced, improving the efficiency of electrochemical reactions inside OCPEMFC. The use of a blower to control the temperature of OCPEMFC can help improve its performance, extend its lifespan, and support its use in cleaner and more sustainable energy applications. Keywords: FUEL CELL, BLOWER, TEMPERATURE, DS18B20 sensors , PWM
Co-Authors Adharul Muttaqin Adrio Irfan Fauzi Afiyah Mahirah Rahman Ahmad Syafiq Kanzul Fikri Alfian Fitrayansyah Alkafi Dimitri Sukmana Audrey Devi Anggraeni Ayatullah Farhan Batara Helda Firdauzy Bernardino Yudika Soesanto Bob Alvin Sidabutar Dhika Abiyoso Rahardianto Eka Maulana Farhan Afif Hanip Hafidh Hidayat Haidar Taqy Hansel Daerendra Mahardhika Elsam Mudjirahardjo, Panca Muhammad Akbar Amran Muhammad Alman Wadi Muhammad Aswin Muhammad Faqih Alfalah Muhammad Nurhilal Hamdi Muhammad Rifqi Nur Sabilillah n/a Wijono Patrick Commanevendi Raden Arief Setyawan Rahmadwati, n/a Rakha Ghilman Fakhruddin Yusuf Rini Nur Hasanah Rini Nur Hasanah Rusli, Mochammad Shafina Rifdhayanti Zein Taqiy Asyam Listyawan Teofilus R.M. Silalahi teub elektro teub Tri Nurwati Vinsensius Anggara Paramayuda Wijono