JMPM (Jurnal Material dan Proses Manufaktur)最新文献

{"title":"Unjuk Kerja Generator Listrik Berbahan Bakar Biogas","authors":"Novi Caroko, Fredy Surahmanto, Rizki Sulistiyo","doi":"10.18196/JMPM.3137","DOIUrl":"https://doi.org/10.18196/JMPM.3137","url":null,"abstract":"Abstrak Pengujian unjuk kerja generator berbahan bakar biogas belum banyak dilakukan. Penelitian ini bertujuan untuk mengetahui unjuk kerja genset berbahan bakar biogas. Bahan baku biogas yang digunakan pada penelitian ini berasal dari kotoran sapi. Pengambilan biogas dilakukan di kelompok ternak sapi Pandan Mulyo, Bantul, Yogyakarta. Generator yang digunakan berkapasitas daya 2.200-Watt dan variasi pembebanan 660, 720, 780, 840, dan 900 Wat. Parameter yang diambil berupa tegangan, arus, putaran mesin, dan debit biogas. Hasil penelitian menunjukkan daya keluaran genset dari 5 variasi pembebanan yaitu 660, 720, 780, 840, dan 900 Watt berturut-turut adalah 599,4; 651; 681,6; 676,5; dan 668,5 Watt. Nilai konsumsi bahan bakar dari 5 variasi pembebanan yaitu 0,645; 0,652; 0,673; 0,680; dan 0,727 kg/jam. Dari 5 variasi pembebanan menunjukkan bahwa unjuk kerja paling optimal dari genset berbahan bakar biogas ini berada pada tingkat pembebanan 660 Watt dengan daya keluaran yang dihasilkan sebesar 599,4 Watt. Abstrak The performance testing of biogas-fueled generators has not been carried out much. This study aims to determine the performance of biogas fueled generators. The biogas raw material used in this study was cow dung. Biogas extraction was carried out in the Pandan Mulyo cattle group, Bantul, Yogyakarta. The generator used is 2,200-Watt power capacity and variations in loading 660, 720, 780, 840, and 900 Watt. The parameters are taken in the form of voltage, current, engine rotation, and flow of biogas. The results showed the generator output power of 5 experiment variations, 660, 720, 780, 840, and 900 Watt, respectively, were 599.4; 651; 681.6; 676.5; and 668.5 Watt. The fuel consumption of 5 variations are 0.645; 0.652; 0.673; 0.680; and 0.727 kg / hour. From all variations, showed that the optimal performance of the biogas fueled generator is at 660 Watt with the output power of 599.4 Watt.","PeriodicalId":359489,"journal":{"name":"JMPM (Jurnal Material dan Proses Manufaktur)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132147782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kontur Tekanan dan Kecepatan Aliran Fluida Pada Pompa Hydraulic-Ram","authors":"Sukamta Sukamta, S BinandaBrajaMahendra, Krisdiyanto Krisdiyanto, Ongky Janalto, Wursito Adi Priambodo","doi":"10.18196/JMPM.3138","DOIUrl":"https://doi.org/10.18196/JMPM.3138","url":null,"abstract":"Abstrak Karakteristik aliran fluida sangatlah penting diprediksi agar dapat dilakukan upaya pencegahan dini terhadap kerusakan yang terjadi pada saluran perpipaan. Salah satu metode yang tepat untuk memprediksi karakteristik aliran tersebut adalah Computational Fluid Dynamics (CFD). Metode ini sangat cocok digunakan untuk melakukan analisis sebuah sistem yang rumit dan sulit dipecahkan dengan perhitungan manual. Penelitian ini dilakukan untuk mengetahui fenomena aliran yang terjadi pada pompa Hydram dengan simulasi numerik menggunakan software ANSYS Fluent 19 R2 academic. Simulasi ini dilakukan pada pompa Hydram berdiameter tabung 8 inch dan panjang pesat 7,3 m. Simulasi pada kondisi transien ini dilakukan dengan menggunakan metode layering mesh dinamis. Hasil simulasi menunjukkan karakteristik aliran fluida di dalam pompa Hydram dengan kontur tekanan yang tidak merata tetapi terkonsentrasi pada titik tertentu. Tekanan di area badan pompa lebih tinggi daripada di area tabung, perbedaan tekanan disebabkan oleh gerakan katup dan perbedaan diameter pipa. Kecepatan aliran pada pipa pesat sangat berpengaruh pada tekanan yang dihasilkan, dan hal ini akan mempengaruhi head pompa Hydram juga akan meningkat. Abstract It is important to predict the characteristics of the fluid flow so that early prevention efforts can be made. An appropriate method for predicting the flow characteristics is Computational Fluid Dynamics (CFD). This method is suitable for analyzing complex systems that are difficult to solve using manual calculations. This research was conducted to determine the flow phenomenon that occurs in Hydram pumps with numerical simulations using ANSYS Fluent 19 R2 academic software. This simulation was carried out on a Hydram pump with a diameter of 8 inches and a pipe length of 7.3 m. Simulations on these transient conditions are carried out using the layering dynamic mesh method. The simulation result in the fluid flow characteristics at Hydram pump with uneven pressure contours but concentrated at a certain point. Pressure in the pump body area is higher than that in the tube area, the pressure difference is caused by the movement of the valve and the difference in pipe diameter. The flow velocity on the pipe is very fast influencing the pressure generated, and this will affect the Hydram pump head will also increase.","PeriodicalId":359489,"journal":{"name":"JMPM (Jurnal Material dan Proses Manufaktur)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126604488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulasi Penerapan End Plate Wing Tip Devices pada Pesawat Model UAV Jenis Glider","authors":"Azhim Asyratul Azmi, W. Wahyudi, Aris Widyo Nugroho","doi":"10.18196/jmpm.3239","DOIUrl":"https://doi.org/10.18196/jmpm.3239","url":null,"abstract":"Aliran udara yang bergerak dari tekanan tinggi ke tekanan rendah menimbulkan pusaran udara pada ujung sayap atau biasa dikenal sebagai wing tip vortices. Wing tip vortices menyebabkan downwash yang mengurangi nilai gaya angkat pada sayap. Berbagai tipe wing tip devices kemudian dirancang untuk mengurangi wing tip vortices, salah satunya adalah wing tip devices jenis end plate. Penelitian pengaruh penerapan wing tip devices dengan variasi sudut kemiringan dapat menggunakan metode pendekatan simulasi. Wing tip devices jenis end plate dirancang dengan desain mengacu pada Withcomb winglet bagian atas. Objek simulasi meliputi pesawat model glider tanpa end plate, menggunakan end plate dengan sudut kemiringan 0o dan end plate dengan sudut kemiringan 15°. Simulasi dilakukan dengan tiga variasi kecepatan jelajah 50, 60, dan 70 km/jam. Hasil simulasi menunjukkan bahwa penerapan end plate dapat meningkatkan nilai gaya angkat. Persentase peningkatan terbesar yaitu 4,1% menggunakan end plate dengan sudut kemiringan 15° pada kecepatan 70 km/jam. Persentase penurunan nilai gaya hambat terbesar terjadi pada konfigurasi end plate dengan sudut kemiringan 15° pada kecepatan 50 km/jam yaitu sebesar 1,04%. Hasil kontur dan iso surface menunjukkan bahwa penerapan end plate pada ujung sayap menjadikan distribusi tekanan lebih merata di permukaan sayap sehingga terjadi peningkatan nilai gaya angkat. Air flow moving from high pressure to low pressure produces vortex at wing tip known as wing tip vortices. Wing tip vortices generate downwash flow and reduce distribution of pressure on the wing. Many types of wing tip devices had been designed to reduce wing tip vortices effect, one of the design is known as end plate wing tip devices. Research of wing tip devices with cant angle variation can be conducted by simulation approach. The end plate wing tip devices has been designed according to the upper section of with comb winglet. The object of simulation was a glider plane model without end plate, end plate with cant angel 0° and 15°. Simulation had been observed with three variations of cruising speed: 50, 60, and 70 km/h. Simulation result shows the 15° end plate can increase 4.1% lift at 70 km/h, and reduce 1.04% drag at 50 km/h compared to wing tip without end plate. Contour and iso surface result the end plate make pressure distribution on wing pressure more uniform and generated more lift.","PeriodicalId":359489,"journal":{"name":"JMPM (Jurnal Material dan Proses Manufaktur)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120967619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}