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All Journal IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) International Journal of Applied Research and Sustainable Sciences (IJARSS)
Tarigan, Ratna Kristina
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Religion Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Education Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Perhitungan Panas pada Pemanasan Preform PET di Unit Heater Blow molding PT. Sinar Sosro Saragih, Koko Pratama; Tarigan, Ratna Kristina; Putri, Jaihy Sabana
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 3 (2024): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i3.154

Abstract

Blow molding is a bottle molding process aimed at forming PET preforms into PET bottles. This process is highly influenced by heat, which functions to soften the PET preform to facilitate its formation in the subsequent stages. Therefore, temperature control is a critical factor in this process. The energy balance method was used to calculate the heat required during the preform heating process in the heater unit. The results showed that the heat required during the preform heating process in the heater unit was 6,441,218.72 cal/hour, 6,531,114.65 cal/hour, and 6,486,129.51 cal/hour. The heat transfer efficiency of the heater for the preform was 90.74%, 92.00%, and 91.37%, respectively.
Calculation of Impurity Levels in SIR 3CV Type Rubber and Mass Balance at the Drying Station in PT. XYZ North Sumatera Tarigan, Ratna Kristina; Simatupang, Dimas Frananta
International Journal of Applied Research and Sustainable Sciences Vol. 2 No. 1 (2024): January 2024
Publisher : MultiTech Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59890/ijarss.v2i1.1253

Abstract

The quality of latex significantly affects the quality level of rubber produced, with one of its parameters being the impurity level, with a standard value of 0.03%. The impurity level strongly influences the rubber quality, where higher impurity levels correspond to lower rubber quality, and vice versa. The research method employed was experimental and calculation using mass balance. The calculated results indicated impurity levels in the rubber as follows: 0.0059%, 0.0069%, 0.0074%, 0.0419%, 0.0054%, 0.0429%, and 0.0444%. The average total impurity level was 0.0219%. However, some rubber samples did not meet quality standards due to contaminated tapping equipment, inadequate washing processes, and damaged filtration tools. In the mass balance at the drying station, the first input material was 125 kg/hour with a water component balance of 50%, HAS (Hevea Acidic Solution) 12%, SMBS (Sodium Metabisulfite) 8%, and latex 30%. The second input material is 18.75 kg/hour, consisting of 100% steam. The output material at the drying station is 143.75 kg/hour, with a water component balance of 43.47%, HAS 10.43%, SMBS 6.95%, latex 26.08%, and steam 13.07%.
Perhitungan Neraca Massa pada Sistem Kolom Distilasi dengan Umpan Fatty Acid Tarigan, Ratna Kristina; Nainggolan, Fernando; Sidabutar , Helisa Amanda
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 1 (2026): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i1.298

Abstract

Distillation is a separation method used to isolate fatty acid components based on differences in their boiling points. This process is carried out using three distillation columns operating under different pressure and temperature conditions. The first column operates at a pressure of 12–14 mbarA and a temperature of 245–246 °C, the second column at 5–6 mbarA and 247–248 °C, and the third column at 14–15 mbarA and 268–270 °C. The main products from the first and second columns are obtained from the middle fraction, namely the fatty acids FA1698 and FA1865. Meanwhile, the third column is used to separate the heavy-end components (C16, C18, C20, and unidentified compounds) from the residue, forming Mixed Acid Oil (MAO). This study focuses on mass balance analysis to determine the mass flow rates and composition of the bottom fraction in each distillation column. The results show that the first column produces a bottom product of 7092.5 kg/h, with stearic acid (65.53%) and palmitic acid (33.19%) as the dominant components. The second column yields 393.25 kg/h, with the major components being stearic acid (55.02%) and palmitic acid (32.37%). The third column produces an MAO residue of 162.25 kg/h, primarily consisting of stearic acid (48.61%) and palmitic acid (28.88%).
Co-Authors Dimas Frananta Simatupang Nainggolan, Fernando Putri, Jaihy Sabana Saragih, Koko Pratama Sidabutar , Helisa Amanda