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All Journal Justek : Jurnal Sains Dan Teknologi Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi JURNAL KIMIA SAINTEK DAN PENDIDIKAN International Journal of Applied Research and Sustainable Sciences (IJARSS)
Paranita, Darni
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Religion Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Determination of Cooling Water Requirement for Plastic Film Extrusion Process at PT. XYZ North Sumatra Paranita, Darni; Donda, Donda; Simatupang, Dimas Frananta
Justek : Jurnal Sains dan Teknologi Vol 6, No 4 (2023): Desember
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v6i4.20319

Abstract

Abstract:  The cooling water is a liquid medium used to cool down plastic film after it undergoes melting in the plastic film extrusion process. This research aims to determine the required amount of cooling water needed to cool the plastic film before it enters the cutting process. The research method involved collecting primary data from the factory and determining the heat and cooling water requirements using thermodynamic equation calculations. The results indicate that a flow rate of 475 kg/hour of plastic film releases heat into the cooling water at an average rate of 19175.9043 kcal/hour, with an average cooling water requirement of 983.366925 L/hour.Abstrak: Air pendingin merupakan media cairan yang digunakan untuk pendinginan film plastik setelah mengalami peleburan pada proses ekstrusi film plastik. Penelitian ini dilakukan dengan tujuan untuk menentukan jumlah air pendingin yang diperlukan untuk mendinginkan film plastik sebelum nantinya masuk ke dalam proses pemotongan. Metode penelitian dengan pengumpulan data primer dari pabrik dan menenetukan panas serta kebutuhan air pendingin dengan kalkulasi persamaan termodinamika. Hasil menunjukkan bahwa sebanyak 475 kg/jam laju alir kapasitas film plastik melepas panas ke air pendingin dengan rata-rata sebesar 19175,9043 kkal/jam dengan kebutuhan air pendingin rata-rata sebesar 983,366925 L/jam.
ANALISA NILAI TEGANGAN PATAH RANTAI JENIS ROLLER AKIBAT ADANYA DEFORMASI Darmadi, Herry; Muttaqin, Maraghi; Paranita, Darni; Simbolon, Tommy Frans
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 9, No 2 (2023): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v9i2.8371

Abstract

The chain is a series of links or rings that are connected or fixed so that they form vertically. Chains are used to move luggage or as a substitute for additional strength. One of the most commonly used chains is made of the hardest metal, steel. One is a chain roller mounted on an empty coil conveyor. This conveyor serves to carry empty coils to the shelter. The chain also plays a role in the distribution of materials from one place to another to make it more efficient. In this study, the authors tested five chain materials to determine the breaking stress and the factors that influence chain breaking. After the authors tested the steel chain material, the value of the chain tensile stress (σB), based on the test results after averaged was 880 Kgf/cm2, and the chain fracture stress (σF) after averaged was 764. is Kgf/. the average strain on the chain (ԑ) is 8.9°. Causes of chain breaks are overload, fatigue, improper heat treatment, improper design and manufacture, and lack of maintenance.
PENGARUH UKURAN PARTIKEL TANDAN KOSONG KELAPA SAWIT (TKKS) DAN CANGKANG SAWIT DALAM PEMBUATAN PAPAN PARTIKEL MENGGUNAKAN POLIETILENA (PE) DAN POLIVINIL ALKOHOL (PVA) Donda, Donda; Salim, Emil; Paranita, Darni; Francisco, Yosua
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 7 No. 1 (2023): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/kimia.v7i1.3867

Abstract

Telah dilakukan penelitian terhadap besar ukuran Tandan Kosong Kelapa Sawit (TKKS) terhadap beberapa bahan polimer  yaitu LDPE (Low Density Polietilena), HDPE (High Density Polietilena, dan PVA (Polivinil Alkohol) diperoleh hasil terhadap daya serap air sangat dipengaruhi terhadap ukuran TKKS  dimana semakin besar ukuran bahan (10 mesh) pada bahan LDPE semakin besar daya serap air = 9,47 %, sedangkan pada HDPE semakin besar ukuran TKKS (10 mesh) semakin besar daya serap = 2,34 %, dan untuk bahan PVA untuk TKKS (10 mesh) semakin besar kadar air semakin kecil =7,39%,  kerapatan partikel pada bahan LDPE semakin kecil ukuran TKKS (60 mesh) kerapatan semakin besar = 1,39 g/ml, pada bahan HDPE semakin kecil ukuran TKKS (40 mesh) maka nilai kerapan makin tinggi =1,80 g/ml, sedang pada bahan PVA semakin besar ukuran TKKS akan lebih besar nilai kerapatannya untuk ukuran TKKS (20 mesh ) =1,09 g/ml. Keteguhan patah (MOR)  untuk bahan LDPE semakin besar ukuran TKKS (10 mesh)  semakin semakin besar = 0,70  x 102 kgf/cm2, untuk bahan HDPE semakin besar ukuran TKKS maka keteguhan patah (MOR) semakin besar untuk TKKS  (10 mesh) = 0,81 x 102 kgf/cm2 dan untuk bahan PVA semakin kecil ukuran TKKS maka semakin besar nilai keteguhan patah (MOR) untuk   TKKS ukuran bahan (60 mesh) = 0,70x 102 kgf/cm2
Determination of Sodium Sulfate Requirement for Obtaining Sodium Sulfide Content in Green Liquor at the Recovery Boiler Unit in PT XYZ North Sumatra Donda; Paranita, Darni; Simatupang, Dimas Frananta
International Journal of Applied Research and Sustainable Sciences Vol. 1 No. 4 (2023): December 2023
Publisher : MultiTech Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59890/ijarss.v1i4.937

Abstract

Black liquor is a residual cooking liquid containing organic chemicals utilized as fuel in the recovery boiler and inorganic chemicals that can be recovered into cooking liquid through the recovery boiler process. The recovery boiler is a specialized boiler unit used to restore black liquor by reducing sodium sulfate into sodium sulfide. The research method involved field observations, liquor content analysis, and stoichiometric calculations to determine the sodium sulfate requirement. The calculations revealed that the sodium sulfide content obtained from the recovery boiler process in green liquor was 24.428 g/l Na2O, requiring a reactive amount of 46,5225.0328 kg/day of sodium sulfate. The target sodium sulfide content in the green liquor aimed for was 18-30 g/l. The results indicated that the sodium sulfide content has met the predetermined target and can be utilized for subsequent processes.
Co-Authors Darmadi, Herry Dimas Frananta Simatupang Donda Donda, Donda Emil Salim Francisco, Yosua Muttaqin, Maraghi Simbolon, Tommy Frans