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All Journal Jurnal Inotera Jurnal Energi dan Teknologi Manufaktur JPIn : Jurnal Pendidik Indonesia International Journal of Research in Vocational Studies (IJRVOCAS)
Muhammad Anhar Pulungan
Politeknik Negeri Medan
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Modifikasi Alternator dan Sistem Kelistrikan Untuk Peningkatan Daya Listrik Sepeda Motor 125 cc Alfi Tranggono Agus Salim; Eko Darmawan; Yoga Ahdiat Fakhrudi; Izhary Siregar; Balkhaya Balkhaya; Muhammad Anhar Pulungan; Sufiyanto Sufiyanto; Thenny Daus Salamoni
Jurnal Energi dan Teknologi Manufaktur Vol 2 No 02 (2019)
Publisher : Polinema Press, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jetm.v2i02.46

Abstract

The alternator on the motor is one component of the vehicle that can be used to improve its utilization. Modifications to the alternator on the vehicle are made to increase electric power. The working principle of an electric generator is in accordance with the law of faraday if a conductor is rotated in a magnetic field until it crosses the magnetic force line (GGM), it will cause an electric force line (GGL) in volts at the end of the conductor. In the alternator to be used, the lighting coil resistance is 0.24 - 0.36 Ω and the charging is 12.3 - 13.3 V at 1500 rpm. The research conducted was an experiment by comparing the alternator output voltage before it was modified with the alternator output that had been modified. Modification of the alternator is done by the method of load variation and replacement of the diameter of the coil along with the number of turns on the alternator. Measurement of alternator before and after modification shows results that are directly proportional to the output of the alternator at 1,000 rpm - 8,000 rpm. The results of three tests can be concluded that the modification of the alternator has increased from 6.42 A for the standard alternator to 13.7 A for the modification alternator.
Building Up Student Learning Outcomes Through Contextual Teaching and Learning (CTL) Learning Approaches in Discrete Mathematics Subjects in The Computer Engineering Study Program of The South Aceh Polytechnic Fera Anugreni; Muhammad Anhar Pulungan
Jurnal Inotera Vol. 5 No. 2 (2020): July - December 2020
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol5.Iss2.2020.ID128

Abstract

Students graduating with a minimum score of C in the 2018/2019 even semester is 47%. Given the importance of the course objectives and the low learning outcomes achieved, a learning approach is applied which is expected to create active learning for students. To present active learning, the learning approach used must be familiar with students' daily lives. One learning approach that can emulate the daily lives of students is the Contextual Teaching and Learning (CTL) learning approach. The formulation of the problems in this study are a) is the application of CTL able to improve the learning outcomes of students in semester II of the Computer Engineering Study Program in Discrete Mathematics courses ?, b) how do lecturers manage learning with the CTL approach ?, and c) how are student learning activities using CTL? The purpose of this study was to a) determine the improvement of student learning outcomes, b) to determine the ability of lecturers to manage learning activities, and c) to determine student activities in learning. The research approach used in this research is quantitative and qualitative approaches, while the type of research is classroom action research (PTK). The subjects of this study were 16 students in the second semester of the Computer Engineering Study Program. The data collection techniques used in this study were a) test questions, and b) observation sheets. The study consisted of 2 (two) cycles, where the first cycle consisted of 3 meetings, while the second cycle consisted of 2 meetings. The results showed that the ability of lecturers to manage learning in cycles I and II was in a good category and the ability of lecturers to manage learning had increased when compared to cycle I to cycle II, from 3.88 to 4.06. Student learning activities in cycle II increased when compared to cycle I. The results of the first cycle test showed that 11 students completed, while in cycle II the results obtained 12 students completed. The percentage of student learning completeness during the first cycle to the second cycle was 68.75% and 75%. The increase in student learning completeness between cycle I and cycle II is 75% - 68.75% = 6.25%.
Analisis Vibrasi Terhadap Massa Pakai Pompa Suntrifugal Unit 4 Fatty Acid Pada PT. Unilever Oleochemical Indonesia Muhammad Anhar Pulungan; Siti Maretia Benu; Sihar Siahaan
Jurnal Pendidik Indonesia (JPIn) Vol 5, No 2: Oktober 2022
Publisher : Yayasan Pendidikan Intan Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47165/jpin.v5i2.437

Abstract

Pompa merupakan salah satu komponen penting di industri oleochemical. Peran pompa disini sebagai alat transfer produk dari satu unit ke unit yang lain. Dalam menjalankan fungsinya ada beberapa faktor yang mempengaruhi, salah satunya vibrasi. Vibrasi merupakan gerakan bolak balik dari mesin atau elemen mesin dari posisi setimbang (diam). Vibrasi juga merupakan salah satu parameter analisa dalam predictive maintenance khususnya digunakan untuk mendeteksi sumber dan gejala kerusakan. Kerusakan ini biasanya disebabkan karena beberapa hal diantaranya kerusakan yang disebabkan oleh kesalahan mekanik dan kerusakan yang disebabkan karena permasalahan bearing. Keruaskan mekanik contohnya misalignment, unbalance, dan juga loosenenss. Sedangkan untuk masalah bearing itu berupa BPFO, BPFI, BSF, dan FTF. Tujuan dilakukannya penelitian ini adalah untuk menganalisis penyebab kerusakan yang terjadi pada pompa sentrifugal agar bisa menghindari hal yang akan mengakibatkan terjadinya breakdown maintenance. Metode yang penulis gunakan dalam pengumpulan data vibrasi adalah observasi dan analisa data. Setelah melakukan analisa vibrasi terhadap pompa sentrifugal pada unit 4, diperoleh hasil temuan yang mengindikasikan kerusakan pada bearing yaitu BPFO. Sehingga dapat disimpulkan bahwa diperlukan perbaikan dengan penggantian bearing.
Analysis of the Effect of Tapioca Flour Adhesive on the Characteristics of Palm Oli Empty Charcoal Briquettes Muhammad Anhar Pulungan; Sihar Siahaan; Siti Maretia Benu
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 4 (2023): IJRVOCAS - Special Issues - International Conference on Science, Technology and
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i4.156

Abstract

Palm oil solid waste such as oil palm empty fruit bunches (TKKS) if not processed can be explained by the environment. This study attempts to study the utilization of oil palm empty fruit bunches as charcoal briquettes. Charcoal briquettes are one of the alternative fuels to replace fuel gas and firewood charcoal. The empty sign of the oil palm is burned so that it becomes charcoal, then the charcoal is ground and sifted, after being sifted it is given a mixture of adhesive, namely tapioca flour. The mixed charcoal is put into a briquette press. The research was conducted on a laboratory scale with a carbonization process at a temperature of 500℃, carbonization time of 3 hours. The process of drying briquettes at a temperature of 100⁰C for 1 hour. Comparison of the composition of 1000 grams of empty oil palm fruit bunches with 20% tapioca starch adhesive. From the results of the study, the briquette values obtained were as follows: 4775.18 cal/g, 6.96% water, 9.18% ash content, and 84 minutes of burning time. The empty bunches of charcoal briquettes were tested according to the SNI No.1/6235/2000 standard, which is a minimum calorific value of 5000 cal/gram, a maximum water content of 8%, and an ash content of 8%. The parameters of water content and burn time have met the standard. The parameters of the ash content and calorific value of the samples taken and tested have not met the standard of SNI No.1/6235/2000. One of the steps that can be tried to improve the quality of the ash content and calorific value is to rearrange the composition of the adhesive.
Co-Authors Alfi Tranggono Agus Salim Anugreni, Fera Balkhaya, Balkhaya Eko Darmawan Izhary Siregar Sihar Siahaan Siti Maretia Benu Sufiyanto, Sufiyanto Thenny Daus Salamoni Yoga Ahdiat Fakhrudi