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Media Mesin: Majalah Teknik Mesin
Published by Universitas Muhammadiyah Surakarta
ISSN : 14114348     EISSN : 25414577     DOI : 10.23917/mesin
Core Subject : Engineering,
Mechanical Engineering
Arjuna Subject : -
Articles 12 Documents
 1   2 
Search results for , issue "Vol 20, No 2 (2019)" : 12 Documents clear
ANALISIS PERPINDAHAN PANAS PADA KACA LEMBARAN JENIS SODA-LIME GLASS Eko Julianto; Doddy Irawan; Bagus Rahardian
Media Mesin: Majalah Teknik Mesin Vol 20, No 2 (2019)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v20i2.8527

Abstract

Kaca adalah produk yang mengalami verifikasi sempurna, kaca juga merupakan gabungan oksida anorganik yang tidak mudah menguap, yang dihasilkan dari dekomposisi dan peleburan senyawa alkali dan pasir serta berbagai penyusutan lainnya sehingga menghasilkan produk yang menghasilkan struktur atom yang acak. Hasil analisa yang telah dilakukan pada proses pelengkungan kaca lembaran jenis soda lime glass menjadi kaca lengkung dengan ketebalan 5mm, didapat perubahan lengkungan kaca sebesar 11,2˚, proses perubahan defleksi kaca dihitung setiap 5 menit dalam waktu 60 menit. Sedangkan nilai aliran konduksi senilai 309,6 joule dan konveksi 636,6 joule. Adapun suhu yang didapat dalam pelengkungan kaca di dalam dapur tinggi atau ruang pembakaran yaitu kurang lebih 500˚-600˚C untuk perubahan temperatur awal kaca yaitu suhu dalam ruang pembakaran 34˚C atau di asumsikan 0˚C menjadi 380,7˚C pada waktu 60 menit kaca sudah mengalami perubahan defleksi Pada proses ini hasil analisa juga akan dibahas pada batas besaran temperatur konduksi dan konveksi untuk mempermudah pengolahan data dan perhitungan laju aliran panas yang didapat pada eksperimen untuk dicoba pada kendaraan minibus.
CHARACTERIZATION OF BAMBOO TUTUL CHARCOAL PARTICLE PRODUCED BY HIGH ENERGY BALL MILLING SHAKER TYPE S Supriyono; B. Susilo
Media Mesin: Majalah Teknik Mesin Vol 20, No 2 (2019)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v20i2.8534

Abstract

The objective of this study is to characterize bamboo tutul charcoal particles produced by High Energy Ball Milling (HBEM) shaker type. The HEBM process was conducted in the stainless steel vials for 2 million cycles at 900 motor RPM. The ball milling diameter was 1/4 inch made from steel. Therefore, perhaps the final particle size will be determined by empty space of the vial for the movement of the balls. In this study, the empty space is varied for 1/2, 1/3, 1/4, and 1/5 of vial volume. Particle Size Analyzer (PSA) is used to have the particle sizes and SEM-EDX is used to have surface morphology of the particle. The average final particle sizes are 547.8 nm, 522.9 nm, 422.7 nm, and 739.4 nm for 1/2, 1/3, 1/4, and 1/5 empty space of vial respectively. The surface morphologies of the particles are determined by fracture mechanism as they can be seen on the SEM results. Based on the results, it can be said that there is no correlation between the particle size and the empty space of the vial. As long as there is space for movement of the milling balls, the collision occurs and the reduction of the particle also happens.

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