Jurnal Teknik Mesin https://ejournal.unesa.ac.id/index.php/jtm-unesa <p><strong>JURNAL TEKNIK MESIN (JTM)</strong> is media of information and a forum for the study of mechanical engineering.&nbsp; Contains scientific papers, summaries of research results, literature reviews of student of graduate Mechanical Engineering UNESA.</p> Universitas Negeri Surabaya en-US Jurnal Teknik Mesin 2302-6987 PENGARUH VARIASI DIAMETER KAWAT KUMPARAN GENERATOR LINIER TERHADAP PERFORMA GENERATOR LINIER https://ejournal.unesa.ac.id/index.php/jtm-unesa/article/view/43871 <p><em>Energy is an important need for humans, especially electrical energy. Ocean wave energy is alternative energy generated through the effects of air pressure movement due to fluctuations in wave movement. With these waves, the mechanical energy of the waves can be converted into electrical energy with a translator. The size of the electric current produced at the ends of the emf is influenced by 3 factors, namely the number of turns, the strength of the magnetic field, and the speed of magnetic movement or the speed of change in magnetic lines of force (magnetic flux). This research focuses on the importance of laboratory-scale research to determine the linear generator analysis for wave energy conversion. The purpose of this study to determine the output, among others; (1) Linear Generator Generating Power, (2) Linear Generator Voltage, (3) Linear Generator Current, (4) Linear Generator Power, (5) Linear Generator Efficiency.</em></p> <p><em>Based on this research, it can be concluded (1) The performance obtained in the linear generator test in each different variation, the results obtained on a generator with a wire diameter of 1 mm obtained an efficiency of 8.18%, on a generator with a wire diameter of 0.5 mm the efficiency results of 5.74%, and on a generator with a wire diameter of 0.2 mm the efficiency results are 3.06%. The size of the coil wire diameter is quite influential on changes in voltage and current including power. Where as the voltage increases, the current also increases for each diameter variation. (2) Obtained a linear generator with a coil wire diameter of 1 mm with effective results, getting a voltage of 4.09 volts, getting a current of 17.49 mA (0.01749 Ampere) and getting a power of 0.0715 watts with an efficiency value 8.05%.</em></p> <p><strong><em>Keywords:</em></strong><em> Alternative Energy, Linear Permanent Magnet Generator, Variation of coil wire diameter.</em></p> Chalky Hianx Cangkara Aris Ansori ##submission.copyrightStatement## 2021-12-20 2021-12-20 10 01 1 6 PENGARUH JUMLAH LILITAN KAWAT PADA KUMPARAN GENERATOR LINIER TERHADAP PERFORMA GENERATOR LINIER https://ejournal.unesa.ac.id/index.php/jtm-unesa/article/view/43895 <p><em>In the utilization of wave power, it is necessary to develop it to produce optimal electrical energy in converting motion energy into electrical energy. Based on the above problems, a research was carried out on the effect of the number of turns of wire in a linear generator coil on the performance of a linear generator. The purpose of this research; (1) Knowing the effect of the number of coil turns on the power generated by a linear generator, (2) Getting the best number of coil turns for a linear generator from testing the PLTGL mechanism for a magnetic linear generator.</em> <em>The method used is an experimental method with a linear generator as the object of research. The test method is carried out in a wave simulator pool which will move the buoy and the generator shaft up and down. Data analysis using descriptive method. In this experiment, researchers used variations in the number of coil wires of 2000, 3000, 4000 turns.</em> <em>The results of the study showed that the number of coil wires had an effect on the power and efficiency of the linear permanent magnet generator, namely the more the number of coil wires, the higher the power and efficiency produced, this can be seen from the power and efficiency produced, namely 0.0227 Watt with an efficiency of 2.55%, 0.0487 Watt with 5.48% efficiency, 0.0882 Watt with 9.92% efficiency. From this research, the best number of coils from a linear generator is to use 4000 turns. This is because the magnetic field that cuts the coil is getting more and more and the value of the induced electromotive force is getting bigger.</em></p> <p><strong><em>Keywords:</em></strong> <em>Linear Generator, Number of Windings, PLTGL, Magnetic.</em></p> Sentanu Herman Dimasrozaq Aris Ansori ##submission.copyrightStatement## 2021-12-21 2021-12-21 10 01 7 12 UJI KARAKTERISTIK MINYAK PIROLISIS BERBAHAN BAKU LIMBAH PLASTIK POLYPROPYLENE https://ejournal.unesa.ac.id/index.php/jtm-unesa/article/view/43904 <p><em>The number of plastic uses that are not accompanied by the ability to recycle has effect an increase the amount of plastic on earth. Plastics have non-biodegradable properties. One safe method is pyrolysis which is an eco-friendly method because it does not produce waste during the&nbsp; process. This method can also reduce waste by up to 90%. Pyrolysis produces&nbsp; products in the form of charcoal (char), oil, and gas. Bio-oil from&nbsp; pyrolysis can be used&nbsp; as a substitute for fossil fuels. The purpose of this study&nbsp; was to analyze the characteristics of oil produced by pyrolysis polypropylene plastic, the influence of reactor temperature on the characteristics of pyrolysis oil, and compare oil characteristics&nbsp; with Other fuels include: density, viscostas,&nbsp; heatvalue, flash point,and&nbsp; cetane number. &nbsp;This study uses experimental methods with descriptive qualitative data analysis, namely by applying reactors at temperatures of 350°C, 400°C, and&nbsp; 450°C to determine the characteristics of&nbsp; pyrolysis oil, namely: density, viscosity,&nbsp; flash point, heat value, and cetane number. The best pyrolysis oil characteristics obtain are density at reactor temperature of 400°C&nbsp; which is 0.813 kg / l. Viscosity and heat values at reactor temperature 350°C which is 2.05 cst&nbsp; and&nbsp; 12380.5 kcal/kg. Flash points and cetane numbers at reactor temperatures of 450°C&nbsp; which is 51.05°C&nbsp; and 47.05. The temperature of the reactor affects the characteristics of pyrolysis oil. From the results of the comparison it can be concluded that the characteristics of PP pyrolysis oil are close to the characteristics of diesel.</em></p> <p><strong><em>Keywords</em></strong><em> : </em><em>Pyrolysis, PP plastic waste, Characteristics of Pyrolysis Oil, Alternative&nbsp; Fuels.</em></p> Faiqul Hidayat Indra Herlamba Siregar ##submission.copyrightStatement## 2021-12-22 2021-12-22 10 01 13 20 RANCANG BANGUN FIN TIPE HELICAL PADA PENUKAR PANAS DOUBLE PIPE https://ejournal.unesa.ac.id/index.php/jtm-unesa/article/view/44453 <p><em>Developments in science and technology (IPTEK) have shown a significant increase. Many types of heat exchangers are designed and used in power plants and refrigeration units as aids in industrial work cycles. Fin is one of the important components of a double pipe heat exchanger, fin is used as a thermal barrier in the heat energy transfer process which serves to provide indirect contact or residence time for the working fluid. The purpose of this study was to design a helical type fin on a double pipe heat exchanger based on the TEMA standard which is expected to have good performance. The object of this research is the helical fin in a double pipe heat exchanger with a helical fin pitch of 40 mm, the type of fin used is helical. Data retrieval is obtained by using a thermocontrol measuring instrument and a flowmeter. It has been successfully developed a helical type fin on a double pipe heat exchanger that can work well in exchanging two fluids (water) counterflow with a cold fluid flow capacity of 6 lpm and a hot fluid flow of 4 lpm with an effectiveness of 14.8%, and there is no system leakage. when physically tested. Thus this heat exchanger can be used to simulate the convection heat transfer process in the heat exchanger.</em></p> <p><strong>Keywords:</strong> <em>Heat exchanger, double pipe, effectiveness, helical fin ,design.</em></p> Fajar Anggoro Made Arsana ##submission.copyrightStatement## 2022-01-14 2022-01-14 10 01 35 40 ANALISA LAJU KOROSI PADA BAJA KARBON RENDAH SPCD DENGAN MENGGUNAKAN METODE PAINTING DAN PHOSPHATING SEBAGAI MEDIA PELAPISAN LOGAM https://ejournal.unesa.ac.id/index.php/jtm-unesa/article/view/44164 <p>Abstrak<br>Baja SPCD adalah jenis baja karbon rendah yang memiliki kelemahan terhadap ketahanan korosi. <br>Penelitian berikut dimaksudkan guna menganalisa data laju korosi dan struktur mikro pelat baja SPCD<br>setelah melalui proses perendaman larutan HCL konsentrasi 5M memakai jenis pelapisan logam<br>painting dan phosphating dengan variasi ketebalan 1 lapisan, 2 lapisan, dan 3 lapisan. Waktu yang<br>digunakan untuk perendaman adalah 1 minggu, 2 minggu, dan 4 minggu. Hasil uji laju korosi<br>menghasilkan rata-rata nilai laju korosi paling rendah atau meminimalkan resiko terjadinya korosi<br>paling tinggi selama waktu perendaman 1 sampai 4 minggu yakni 64.617mpy - 25.043mpy pada jenis<br>pelapisan logam painting</p> <p><br>Kata Kunci— Baja SPCD; Metode pelapisan; Laju korosi; Struktur mikro.</p> Yonathan Ari Setiawan Arya Mahendra Sakti ##submission.copyrightStatement## 2022-01-05 2022-01-05 10 01 21 26 PENGARUH VARIASI FRAKSI VOLUME DAN JENIS CORE PADA KOMPOSIT SANDWICH HYBRID SERAT FIBER GLASS TERHADAP KEKUATAN BENDING DAN IMPAK https://ejournal.unesa.ac.id/index.php/jtm-unesa/article/view/44260 <p>Abstrak <br>Lambung kapal atau kulit kapal sering mengalami kerusakan yang disebabkan oleh faktor cuaca maupun binatang perusak. Namun perawatan pada lambung kapal ini perlu dilakukan secara rutin agar kapal tetap kuat, lebih tahan lama dan menyebabkan ketahanan kayu semakin lama. Lambung atau kulit kapal<br>merupakan bagian dari kapal yang sering mengalami kerusakan dan penggantian kayu setelah pemakaian dalam jangka waktu tertentu. Pada penelitian ini menggunakan jenis penelitian eksperimen dimana sebagai bahan komposit sandwich hybrid dengan skin core kayu nangka, kayu jati dan kayu kamper yang akan dikombinasikan dengan variasi fraksi volume serat fiberglass dimana nantinya setiap variabel akan diuji bending dan uji impak dengan tiga spesimen untuk setiap variabel. Spesimen yang sudah diuji impak dan bending kemudian dianalisa pengaruh dari variabel bebas terhadap variabel terikat. Variabel bebas meliputi fraksi volume serat 40%,50% dan 60%. Berdasarkan dari penelitian ini didapatkan kesimpulan (1) Fraksi volume berpengaruh terhadap impak maupun bending. Hasil terbesar terletak pada variasi fraksi volume 60% yang memiliki kekuatan impak dan bending masing-masing 0,02115J/mm² dan 94,945 Mpa, sedangkan nilai kekuatan impak dan bending terendah dihasilkan oleh fraksi volume 40% dengan hasil kekuatan impak dan bending masing-masing<br>0,00386 J/mm² dan 24,449 Mpa. (2) Jenis core kayu berpengaruh terhadap kekuatan impak maupun bending komposit Sandwich Hybrid , Hasil terbesar pada pengujian impak terjadi pada core kayu Jati dengan fraksi volume 60% dan hasil terkecil pada pengujian impak terjadi pada core kayu jati dengan fraksi volume 40%. Sedangkan hasil terbesar pengujian bending terjadi pada core kayu Jati dengan fraksi volume 60% dan hasil terkecil pengujian bending terjadi pada core kayu nangka dengan fraksi volume 40%.<br>Kata Kunci: Komposit, Fraksi Volume, Komposit Sandwich Hibrid, Uji bending, Uji impak.</p> Virdaus Machfud Novi Novi Drastiawati ##submission.copyrightStatement## 2022-01-10 2022-01-10 10 01 27 34