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All Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Polimesin
Arif, Muhammad Imam
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Performa Thin-Thick Orifice Plate Terhadap Kerugian Energi Mahmuddin, Mahmuddin; Syahrir, Muhammad; Arif, Muhammad Imam; Pakambanan, Afryanto
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 11, No 2 (2025): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v11i2.13376

Abstract

The measurement of the volumetric flow rate of fluids in a pipe is essential in process industries, particularly those utilizing pipelines as fluid transport media. Such process variable measurement is conducted to control the system according to a setpoint to achieve process optimization. An orifice plate meter is a type of flow meter used to measure the volumetric flow rate of fluids flowing inside a pipe based on the principle of differential pressure. The performance of an orifice plate meter can be determined by measuring the pressure at the upstream and downstream regions using pressure tappings connected to a manometer tube. The experimental observation of orifice performance was carried out by testing the orifice plate meter at ratios of (s/d) = 0.42, 0.83, and 1.25 with a restriction ratio (β) = 0.5. Pressure measurements at upstream and downstream regions were performed within the Reynolds number range of 6600–16500.The pressure distribution, discharge coefficient (Cd), and permanent pressure loss were considered as the main parameters in classifying the accuracy level of the orifice plate meter as a volumetric flow measurement device. The percentage of permanent pressure loss, referenced to centerline pressure at (s/d) = 0.42, 0.83, and 1.25, was found to be 49.87%, 54.37%, and 67.27%, respectively. The average discharge coefficient (Cd) at (s/d) = 0.83, with references to centerline pressure and D;0.5D, was 0.66 and 0.76, respectively, while for (s/d) = 1.25 the values were 0.65 and 0.68. Meanwhile, for (s/d) = 0.42, the average Cd obtained was 0.73, which is close to the analytical value given in ISO 5167-2 (2013).
Lower-temperature sintering and optimization ratio of SiO2-TiO2-B2O3-ZnO glass ceramic coatings for energy efficient tile Habib, Faisal; Mahmuddin, Mahmuddin; Arif, Muhammad Imam
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8846

Abstract

Conventional ceramic tile glazes typically require firing temperatures above 1180°C, leading to high energy consumption and production costs. Despite extensive studies on composition and crystallization, integrated optimization of oxide balance, crystallization kinetics, and energy efficiency at reduced temperatures remains limited. This study aims to develop and optimize SiO₂–TiO₂–B₂O₃–ZnO glass-ceramic coatings through a combined experimental and data-driven approach to achieve enhanced mechanical performance at lower sintering temperatures. A series of compositions were formulated using locally sourced raw materials and sintered at 1080–1160°C. The crystallization behavior was first characterized using Differential Scanning Calorimetry (DSC) and fitted with the Johnson–Mehl–Avrami–Kolmogorov (JMAK) kinetic model. Phase evolution and microstructure were examined through X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). Mechanical and optical performance were evaluated via Vickers microhardness testing, gloss measurement, and bulk density analysis. Multivariate regression and energy-performance correlation analysis were conducted using MATLAB. The results demonstrate that increasing TiO₂ content promotes heterogeneous nucleation, lowering crystallization peak temperature from 785°C to 725°C and increasing enthalpy release from 48 to 64 J/g. The Avrami exponent (n = 1.75–1.95) indicates three-dimensional crystal growth with mixed nucleation mechanisms. Vickers hardness improved from 515 HV to 670 HV with increasing TiO₂ concentration, while gloss moderately decreased due to enhanced crystalline fraction. The optimal composition (55 mol% SiO₂, 8 mol% TiO₂, 2 mol% B₂O₃, 2 mol% ZnO) achieved 648 HV, 63 GU, and a 12% reduction in firing energy, demonstrating the feasibility of energy-efficient coating design.
Co-Authors Faisal Habib Mahmuddin Mahmuddin Pakambanan, Afryanto