Journal of Engineering Science and Technology
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Pengaruh Variasi Penambahan Zeolit Pada Briket Arang Jerami Padi dan Sekam Padi Terhadap Nilai Kalor dan Densitas
Full text linkThe demand for fossil energy sources continues to increase, which causes scarcity of these resources because they cannot be renewed. In Indonesia, waste rice straw and rice husks are abundant and have potential as a renewable energy source if converted into charcoal briquettes. However, currently the charcoal briquettes produced have not reached the desired level of efficiency to replace fossil fuels. Therefore, research was carried out to develop biomass energy by mixing zeolite in charcoal briquettes. This research aims to develop charcoal briquettes as an energy source from biomass. In this study, the calorific value of charcoal briquettes from rice straw with a 25% zeolite mixture had the lowest calorific value, namely 3941.2 cal/gram, while charcoal briquettes from rice straw without a zeolite mixture had the highest calorific value, namely 4581.8 cal/gram . The same thing happened to charcoal briquettes from rice husks, with the highest calorific value in charcoal briquettes without a zeolite mixture of 5390.5 cal/gram, and the lowest calorific value in charcoal briquettes mixed with 25% zeolite of 4469.1 cal/gram. The density of rice straw charcoal briquettes with a 25% zeolite mixture has the highest density value, namely 0.338 g/cm3, while rice straw charcoal briquettes without a zeolite mixture have the lowest density, namely 0.199 g/cm3. Likewise, charcoal briquettes from rice husks have the highest density in a 25% zeolite mixture with a value of 0.545 g/cm3, and the lowest density in charcoal briquettes without a zeolite mixture is 0.284 g/cm3
Studi Simulasi Optimasi Parameter Proses Implantasi ION Nitrogen Multi Energi ke Dalam Permukaan SS 316L Menggunakan Program SRIM
Full text linkNitrogen ion implantation at 50 keV of energy on the surface of SS 316 stainless steel, by calculation will only be able to reach a depth of 561 Å and the ions will be distributed Gaussian effectively at a depth of 561 Å ± 339 Å, so that from the surface to a depth of 222 Å is not filled by ions (empty) which of course will affect the properties of the implanted surface. The solution to the problem is to implant the target several times at <50 keV of energy. To minimize the un-filled volume, the study of simulation and calculation has been conducted. In this study a simulation using TRIM program to know how many times the target should be implanted at different energies and also the calculation of the amount of nitrogen ions that should be implanted, so that the distribution of nitrogen ions can be evenly distributed from the surface to 561 Å. From the results of simulations and calculations the results show that the target must be implanted at least 6 times implantation at energy 50 keV,40 keV, 30 keV, 20 keV and 10 keV. Under these conditions the dose that must be implanted are 7,4×1017ion/cm2, 6,44×1017ion/cm2, 4,6×1017 ion/cm2, 3×1017 ion/cm2 and 1,6×1017 ion/cm2. The total doses and amount of nitrogen filling the implanted volume are 7,32%.
Penurunan Kadar FFA (Free Fatty Acid) Minyak Jelantah Menggunakan Adsorben Arang Aktif Ampas Tebu Pada Proses Pembuatan Biodiesel
Full text linkoai:ojs2.jesty.pubmedia.id:article/1One of the obstacles in utilizing used cooking oil as a raw material for making biodiesel is the high FFA (Free Fatty Acid) content. An alternative way that can be used to reduce FFA levels is to use adsorbents to adsorb free fatty acids. This study aims to use bagasse as an adsorbent for activated charcoal to reduce the FFA content of used cooking oil in the process of making biodiesel. The process of reducing the FFA of used cooking oil was carried out by an adsorption process using activated bagasse charcoal with an increased temperature of 100 oC to accelerate the rate of adsorption and evaporation of water trapped in the used cooking oil while stirring at 500 rpm with a magnetic stirrer. The most optimal adsorbent mass for bagasse activated charcoal is to use a mass of 15% w/v used cooking oil, because it has the lowest average FFA value compared to other masses. The most optimal adsorption time for used cooking oil is at 60 minutes of adsorption because it has the lowest average FFA value compared to other adsorption times. FAME
INSECT TRAP LIGHT BERBASIS ANDROID DENGAN TEKNOLOGI SOLAR CELL SEBAGAI SOLUSI PENGENDALIAN HAMA SERANGGA PERTANIAN
Full text linkPada sektor pertanian, ada berbagai tantangan yang hampir tidak lepas dari petani. Salah satunya yaitu tantangan hama tanaman. Hama dapat memberikan pengaruh kurang baik terhadap hasil panen. Pengendalian hama tanaman yang kurang baik dan maksimal akan memberikan dampak yang kurang baik pula terhadap hasil pertanian. Penelitian ini bertujuan untuk membuat dan menerapkan teknologi Insect Trap Light pada pertanian sebagai solusi untuk mengatasi masalah hama tanaman dengan melakukan pengendalian hama guna meningkatkan kualitas dan kuantitas hasil produksi pertanian. Insect Trap Light efektif menurunkan populasi hama serangga yang aktif pada malam hari. Teknologi ini memanfaatkan panel surya untuk mengubah energi matahari menjadi energi listrik sehingga dapat ditempatkan pada lahan yang jauh dari rumah maupun sumber listrik PLN. Dari hasil penelitian yang dilakukan, lampu dapat menyala selama 11 jam dengan menggunakan solar cell 50 Wp dan baterai dengan kapasitas 12 V 35 Ah. Sistem monitoring menggunakan smartphone juga menunjukkan hasil tegangan dan kondisi lampu pada alat perangkap serangga, aplikasi tersebut juga dapat mengontrol lampu dengan baik. Implementasi alat dilakukan pada komoditas terong yang kemudian menghasilkan pengaruh terhadap tanaman dengan tidak adanya penambahan buah yang rusak. Hal tersebut juga menunjukkan bahwa terjadi pengurangan terhadap populasi hama serangga pertanian di lahan tersebut.
Kata-kata kunci: Insect Trap Light, Pengendalian Hama, Solar Cel
Pengaruh Variasi Arus Las SMAW Terhadap Uji Tarik dan Uji Kekerasan Serta Struktur Mikro Pada Bahan ST 37
Full text linkThis research aims to determine the effect of variations in welding currents of 90A, 100A, and 110A on SMAW bases on the material in the tensile, hardness, and microstructure tests. This research uses ST37 low carbon steel and uses E6013 electrodes with a diameter of 3.2 mm, followed by making specimens for testing. After that, the welding process is carried out and then testing continues. In the test, the following results were obtained: The strength value of the welded material with tensile testing was obtained with the highest results at a current variation of 110A with Yp 27.33 Mpa, Max 36.47 Mpa, Break 31.08 Mpa. Because the highest pearlite microstructure value is obtained in the 110A variation. And the lowest value occurred in the welded material of variation 90A with Yp 25.48 Mpa, Max 26.86 Mpa, Break 12.33 Mpa. Because the lowest pearlite microstructure value is obtained in the 90A variation. while the comparison of the level of hardness in ST 37 carbon steel with varying welding currents ranging from 90A, 100A, and 110A has an average hardness value of 168 VHN for welding with a current of 90A for welding with a current of 100A the average hardness value is 177 VHN and finally in welding current 110A the average hardness value is 191 VHN. The hardness level of the ST 37 carbon steel specimen was the highest at a welding current of 110A, with a tensile strength test result of 36.47 MPa. And from the results of observing photos of the microstructure using the point count method, the highest percentage of pearlite was in the welding material variation 110A so the tensile strength value was higher
PERANCANGAN ECO SMART CHARGING AREA DI POLITEKNIK NEGERI JEMBER: DESIGN OF ECO SMART CHARGING AREA AT JEMBER STATE POLYTECHNIC
No full textInovasi Stasiun Pengisian Kendaraan Listrik Umum (SPKLU) menggunakan sistem energi tenaga surya bertujuan agar terciptanya penggunaan energi bersih di Indonesia serta mendorong tercapainya bauran energi nasional tahun 2050. Penerapan inovasi Stasiun Pengisian Kendaraan Listrik Umum (SPKLU) diharapkan dapat menggantikan ketergantungan pada bahan bakar fosil dan diharapkan dapat meningkatkan minat masyarakat agar beralih ke kendaraan listrik yang tidak memiliki emisi bahan bakar. Inovasi Stasiun Pengisian Kendaraan Listrik Umum (SPKLU) pada kegiatan ini disajikan dalam bentuk konsep. Metode yang digunakan dalam perwujudan konsep serta desain dilakukan dengan melalui tahap studi literatur dan tahap survey. ECO SMART CHARGING AREA dapat menghasilkan potensi energi surya sebesar 34.650 WP atau 34,65 kWp. Dengan jumlah energi yang dapat dihasilkan mencapai 34,65 kWp maka charging area ini dapat melakukan pengecasan 10 unit mobil listrik merk Wuling Air EV (Standard Range) dan 41 unit motor listrik secara bersamaan. Charging area ini memiliki Panjang 11 m dan lebar 35,49 m serta memiliki luas sebesar 130,13 dibangun di Politeknik Negeri Jember
IMPLEMENTASI SENSOR ULTASONIK JSN-SR04T SEBAGAI ALAT BANTU PARKIR MOBIL MPV BERBASIS ARDUINO UNO
Full text linkPerkembangan teknologi berkembang cukup pesat, tidak terkecuali di dunia otomotif. Hampir semua kendaraan terbaru dilengkapi dengan teknologi keselamatan yang membantu pengemudi saat parkir untuk menghindari benturan dengan rintangan di sekitar mobil terutama pada malam hari. Namun secara umum, mobil keluaran di bawah tahun 2000 belum memiliki teknologi keselamatan seperti sensor parkir. Teknologi tersebut membutuhkan sensor parkir yang harus dipasang secara manual di dalam mobil. Berdasarkan permasalahan tersebut diperlukan sistem keamanan yang dapat digunakan dengan baik. Untuk itu pada makalah ini dibuat sebuah sistem parkir berbasis mikrokontroller dengan komponen elektronik komersial dan lebih andal mencakup sensor jarak JSN-SR04T, DF-Player, Arduino Uno, LCD 16x2, Speaker. Hasil evaluasi menunjukkan bahwa alat bantu parkir dapat bekerja dengan baik dan sesuai dengan kebutuhan. Penggunaan sensor ultrasonik JSN-SR04T dan Arduino Uno mampu menghasilkan akurasi pengukuran jarak hingga mencapai 99%. Selain itu, nilai presisi pada bidang datar untuk sensor kanan dan kiri mencapai 98%, sedangkan nilai presisi pada bidang gelombang untuk sensor kanan dan kiri mencapai 98%
Pengaruh Pencampuran Eco Racing Dengan Bahan Bakar Pertalite dan Pertamax Pada Performa Sepeda Motor 125 CC
Full text linkFuel is one of the main needs of motorized vehicles. Most motorbike riders want the fuel they use to produce greater torque and power than standard specifications with lower exhaust emissions but save fuel. For this reason, several alternative solutions are needed to overcome this problem, including the use of additives, one of which is eco racing. The aim of this research is to determine the effect of adding eco racing to fuel variations on torque, power and exhaust emissions of 125 CC motorbikes. The research approach was carried out quantitatively by conducting descriptive analytical experiments. Data collection was carried out with various fuel variations at several engine rotation speeds. The research results showed that the mixture of Pertalite with 1 Eco Racing tablet and Pertalite with 2 Eco Racing tablets did not have much effect on power and torque, but increased exhaust emissions. Then, a mixture of Pertamax with 1 Eco Racing tablet and 2 Eco Racing tablets also does not really increase power and torque, but does increase exhaust emissions. The expected result of this research is to determine the effect of adding eco racing on engine performance. From the test results it was found that the addition of eco racing did not increase power and torque, but instead increased exhaust emissions
Konsep Rancang Bangun Smart Home Base Berbasis IOT untuk Skala Perumahan
No full textWorld energy demand continues to increase by 45% until 2030 based on projections of the International Energy Agency (IEA) with an average increase of 1.6% per year. About 80% of these energy needs supplied by fossil fuels. This increase occurred due to population growth, industrialization, lifestyle changes, and the use of increasingly complex technology. The household sector is one of the sectors that require energy to meet daily needs. Researchers conducted a study of research results related to rooftop Solar Power Plants, the use of thermoelectric as a producer of electrical energy, and the use of septic tanks for household gas with digesters that have been published in Indonesian-language journals and proceedings. The concept of a smart home base is implemented assuming a simple housing design, in this design than a technical calculation of the feasibility of a Smart Home Base is carried out which considers efficient methods in the development and provision of energy independently based on renewable energy for cost savings and supports government programs abaout Indonesia Ketahanan Energi 2030. Renewable energy applied to the smart home base concept utilizes Solar Power Plants which are hybrid with Thermoelectric Generators and biogas to replace of the LPG stove. Utilization of IoT-based technology to optimize energy savings at home. The housing concept is assumed with a simple housing design with a daily energy consumption of 5,507 Wh and 1,336 watts of power. The solar system used is 450 Wp for as many as 8 units of solar panels, 12 v 200 Ah battery capacity of as many as 8 units of batteries, and inverters with a power of 2000 Watts