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All Journal APTEK Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Yanda Zaira, Jupri
Unknown Affiliation
Aerospace Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Creating a Vertical Peeling Apparatus for Young Jackfruit Skins Employing Turning Process Technology Hermawan, Muhammad; Ma'a, Mustaza; Yanda Zaira, Jupri; Wijianto, Agus
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 17, No. 02, Juni 2025
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/aptek.v17i2.3178

Abstract

Young Jackfruit (Artocarpus heterophyllus) is a tropical fruit that grows in various regions, including Southeast Asia. While typically harvested when ripe, it is also consumed in its young stage. This final project focuses on the design and development of a Vertical Young Jackfruit Skin Peeling Machine utilizing the Turning Process Method. The proposed peeling machine is powered by a 1 hp motor with a speed of 1450 rpm, which is transmitted to 100 rpm. The machine's driving mechanism comprises a single transmission system, consisting of a pair of pulleys connected by a V-belt. When the motor is activated, the rotation is directly transmitted from pulley 1 to pulley 2, mounted on a 25 mm diameter shaft that rotates the young jackfruit using a V-belt intermediary. As the shaft rotates, a knife applies pressure on the rotating young jackfruit, moving from bottom to top. This movement is facilitated by a threaded shaft mechanism driven by the rotation of the fruit-driving shaft, which receives the rotational transmission from pulley 1 to pulley 2, mounted on a 25 mm diameter shaft to a 17 mm diameter shaft with a rotational speed of 40 rpm. The peeling process is conducted according to the dimensions of the young jackfruit, from bottom to top.
Studi Eksperimental Pengaruh Rasio Beta (β) terhadap Peningkatan Kecepatan Aliran Fluida Inkompresibel Venturi Meter Giustino, Nicholas; Akhyan, Amnur Akhyan; Wijianto, Agus; Yanda Zaira, Jupri
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 16, No. 02, Juni 2024
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/aptek.v16i2.2628

Abstract

Venturi meter merupakan alat yang berfungsi untuk mengukur kecepatan fluida dengan mengadopsi prinsip Bernoulli. Pada umumnya venturi meter  digunakan pada industri minyak, gas, otomotif dan lainnya. Kecepatan aliran pada venturi meter setelah melewati bagian throat meningkat signifikan. Kecepatan aliran yang tinggi dapat mengakibatkan fenomena yang buruk seperti kavitasi, abrasi dan getaran. Serangkaian peralatan alat uji digunakan untuk memantau peningkatan kecepatan aliran Vinc. Fluida yang digunakan adalah air pada temperatur 300C  Dengan variasi beta rasio  0.655 dan 0.549, peningkatan laju aliran volume  12.5; 15 dan 17.5 LPM, fenomena pada venturi meter diteliti. Penurunan tekanan DP dimonitor menggunakan piezometer dan pitot tube.Dari penelitian ini didapat bahwa penurunan β 16,2% akan menyebabkan peningkatan Vinc  sebesar 43,3%.
Experimental Analysis of Mechanical and Thermal Properties of Sugar Palm Fiber-Plastic Composite Roofs Wijianto, Agus; Ma'a, Mustaza; Yanda Zaira, Jupri; Rizkyana, Rizkyana; Arif Sitinjak, Bherry
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 69 No 3 (2025): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v69i3.553

Abstract

This research aims to enhance the performance of Palm Sugar Fiber (PSF) or Ijuk roofing by combining it with recycled High Density Polyethylene (HDPE) plastic as a binder and outer protective layer. The method was used an experimental study with several variations in fiber form and mass, followed by performance testing on temperature, noise, and mechanical properties (tensile, compressive, and impact strength). The results showed that the 40-gram long fiber variation provided the most optimal performance. The indoor temperature beneath the PSF roof was recorded at 38.2°C. The absolute thermal conductivity value was calculated at 0.23 W/m·K. In noise reduction tests, the PSF roof recorded 39.6 dB compared to 74.2 dB for zinc roofing. In terms of strength, the palm fiber roof achieved a tensile strength of 13.24 MPa and the impact strength of 3.16 Joules. Thus, the fiber (fiber) composite roof with HDPE binder demonstrates superior thermal and sound insulation capabilities, as well as sufficient mechanical strength, making it a promising environmentally friendly alternative for modern roofing materials.
Co-Authors Akhyan, Amnur Akhyan Arif Sitinjak, Bherry Giustino, Nicholas Hermawan, Muhammad Ma'a, Mustaza Rizkyana, Rizkyana Wijianto, Agus