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All Journal Turbo : Jurnal Program Studi Teknik Mesin Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi
Farul Apriansa
Universitas Gunadarma
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Optimization of Dehumidification Air Flow Distribution in Temulawak Tray Dryer with Computational Fluid Dynamics Ridwan; Farul Apriansa; Rudi Irawan
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 6 Nomor 2 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i2.6664

Abstract

Temulawak (Curcuma xanthorrhiza Roxb.), a member of the Zingiberaceae family, has long been recognized as a medicinal plant with a moisture content approximately 80-90%. The high moisture content of temulawak renders it challenging to store for extended periods without drying. Temulawak is susceptible to heat damage due to the potential for thermal degradation of its internal components. Accordingly, it can be concluded that low-temperature and low-air-humidity drying conditions are required. Furthermore, one of the most suitable methods is the use of a dryer that incorporates a dehumidification process. The objective of this research is to develop a temulawak dryer design and simulation variations of the incoming velocity of air flow to obtain the most optimal drying chamber by incorporating a vertical airflow channel. A design and simulation for a temulawak dryer were created using the 2022 version of SolidWorks software (flow simulation modul). The design started from drawing two-dimension, then three-dimension, and determining boundary condition and meshing. A fluid temperature of 35.7°C and a relative humidity (RH) of 22% were used to model the drying process at varying airflow velocities of 1.5 m/s, 2 m/s, and 2.5 m/s. The drying chamber, with dimensions of 676 mm x 406 mm and height of 806 mm, was designed using the type AISI 304 and achieved the most optimal airflow distribution results at a velocity of 2.5 m/s, exhibiting a relatively higher fluid temperature than the other two airflow velocity variation.
Analisis Numerik Multifase Transportasi Slurry Abu Terbang Berkonsentrasi Partikel Tinggi Farul Apriansa; Ridwan Ridwan; Iwan Setyawan; Tri Mulyanto
TURBO [Tulisan Riset Berbasis Online] Vol 14 No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4506

Abstract

Transportasi slurry abu terbang mengalami inefisiensi energi akibat resistensi aliran yang tinggi pada pipa konvensional berbentuk lingkaran. Penelitian ini memancarkan pengaruh geometri penampang pipa yaitu lingkaran, spiral dengan empat lobus, dan spiral dengan enam lobus terhadap penurunan tekanan, faktor akurasi, reduksi drag, dan distribusi fraksi volume pada konsentrasi padatan masing-masing 50%, 60%, 65%, 68%, dan 70%. Simulasi Computational Fluid Dynamics (CFD) dilakukan dengan kondisi kecepatan masuk konstan 1.5 m/s. Hasil simulasi menunjukkan bahwa pipa spiral enam lobus secara konsisten memberikan penurunan tekanan dan faktor terjadinya terendah, dengan reduksi drag maksimum sebesar 33,78% pada konsentrasi padatan 70%. Analisis fraksi volume mengindikasikan akumulasi partikel yang lebih signifikan di dekat dasar pipa pada konsentrasi tinggi, yang disebabkan oleh pengendapan gravitasi. Secara keseluruhan, pipa spiral enam lobus menampilkan kinerja hidrolik yang unggul melalui pengurangan resistensi aliran secara efektif, sehingga menjadi alternatif desain yang menjanjikan untuk sistem transportasi slurry dengan konsentrasi tinggi.
Co-Authors Iwan Setyawan Ridwan Ridwan Rudi Irawan Tri Mulyanto