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All Journal JURNAL CRANKSHAFT Quantum Teknika
Irfa'i, Mochamad Arif
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Studi Konsentrasi Larutan KOH dan Arah Orientasi Serat Rami terhadap Kekuatan Impak Komposit dengan Matrik Polyester Pramitasari, Retno Eka; Irfa'i, Mochamad Arif; Prasetyo, Reza
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 3, No 1 (2021): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v3i1.12456

Abstract

The development of increasingly advanced technology, especially in the health sector, can lead to an increase in the need for composite materials used. This study aims to describe the results of the concentration of KOH solution and the orientation of the ramie fiber on the impact strength of composites with a polyester matrix. This research is an experimental study with the manipulation variables are the concentration of the KOH solution and the orientation of the fiber direction by determining the value of the impact strength as the dependent variable of ramie fiber as a control variable of this study. This study obtained the optimum impact test result of 0.0711 J/mm2 with 5% KOH solution concentration and located at 0o/45o/90o fiber direction orientation. While the results of the lowest impact test resulted in a value of 0.0101 J/mm2 without soaking the KOH solution and located at 90o/0o/90o fiber direction orientation.
Efisiensi termal mesin pengering egg tray tipe rak Pramitasari, Retno Eka; Basuki, Basuki; Rokhmah Wati, Dian Anisa; Irfa'i, Mochamad Arif; Rosadi, Mohammad Munib
JURNAL CRANKSHAFT Vol 6, No 2 (2023): Jurnal Crankshaft Vol. 6 No. 2 (2023)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/crankshaft.v6i2.11007

Abstract

Drying is a process that aims to prevent decay. However, the natural drying process can produce less than optimal results, especially during the rainy season. Uncertainty about the use of solar energy triggers to conduct this research. In addition, it takes a long time and requires a large area during the drying process, so this research aims to provide a more optimal value in terms of efficiency by using a rack-type egg tray drying machine. The dimensions of the shelf-type egg tray drying cabinet are 500 x 500 x 900 and a control box. The heating elements are arranged in parallel consisting of 3 tubular heating elements. The thermal efficiency generated in the rack type egg tray drying machine with an average thermal efficiency value of 32.18% and the highest thermal efficiency value produced on the first rack reached 38.32%
Co-Authors Basuki , Dian Anisa Rokhmah Wati Prasetyo, Reza Retno Eka Pramitasari Rosadi, Mohammad Munib