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Jurnal Teknologi
Published by Politeknik Negeri Lhokseumawe
ISSN : 14121476     EISSN : 25500961     DOI : http://doi.org/10.30811/teknologi
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering
Jurnal Teknologi is a peer-reviewed journal that aims at the publication and dissemination of original research articles on the latest developments in all fields of technology and engineering sciences. The journal publishes original papers in Indonesian and English, which contribute to the understanding of engineering science and the improvement of engineering technology. Papers may be theoretical, experimental, or both, and applied engineering science and technology. The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere. The scope of Jurnal Teknologi includes a wide spectrum of technology and engineering science subjects including: Civil engineering; Mechanical engineering; Chemical engineering Electrical engineering; Information and technology; Computer science and engineering; Materials science and engineering; Renewable energy engineering;
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 151 Documents
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Optimasi Laju Alir Tri-Ethylene Glycol terhadap Efisiensi Penyerapan Air pada Kolom Absorbsi Di PT. Pertamina Hulu Energi Andri Riski Maulizar; Alfian Putra; Muhammad Yunus
Jurnal Teknologi Vol 23, No 1 (2023): April 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i1.3647

Abstract

Absorption was a separation process between gas fluids using liquid fluid media. The glycol contactor aims to separate the water content contained in the gas using tri-ethylene glycol media with process conditions at a pressure of 795-810 psi and a temperature of 85-110 oF. The contact process between fluids is assisted by the Intalox Saddle type packing which aims to maximize the contact process between fluids and it is hoped that the absorption process that occurs can be maximized. Tri-ethylene glycol which has absorbed the water content in the gas is regenerated in the glycol burner. This analysis used 4 packing variables (Raschig Rings, Pall Rings Plastic, Berl Saddles Ceramic, and Intalox Saddles Ceramic), 5 flow rate variables (1600, 1800, 2000, 2200, and 2400 BPD) and this analysis use the Hysys simulation program. Based on these variables, the absorption efficiency analysis results are obtained in the range of 93-94%, and the flooding percentage is 21-36%. It can be concluded that the type of packing is very influential on the percentage of flooding. Pall Ring Plastic was the type of packing with the lowest flooding percentage. According to research, lower flow rates increase the efficiency of H2O absorption. 
Analisa Pemanfaatan Kompresor BOG K-6801 A/B pada Fasilitas LNG Hub Fadhel Muhammad; Syafruddin Syafruddin; Ratna Sari
Jurnal Teknologi Vol 23, No 1 (2023): April 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i1.3750

Abstract

Boil Off Gas (BOG) is formed as a result of the evaporation of liquefied gas at atmospheric pressure as a result of the expansion of the cargo space such as a tank which can endanger the condition of the tank if it exceeds the pressure design on the tank. So, to maintain pressure in safe conditions, the BOG usually has to be burned and directed to the flare. In another word, the factory has been wasting clean gas for free. So there is a better option to use a compressor for fuel-to-plant operation. Compressor K-6801 is a centrifugal type compressor with a single casing multi-stage compressor, with a prime mover or drive in the form of an electric motor. The BOG compressor functions to compress/drain the evaporation gases (Boil Off Gas) from the LNG tank to the PLTMG and the fuel system, while the excess output from the compressor BOG will be flowed to the booster compressor to flow along with the output from the ORV to the ARBEL (Arun-Belawan) gas network. The output BOG from the LNG tank will enter the compressor suction with a temperature of -145.5 °C and a pressure of 0.00054 kg/cm2G, where it will then come out of the discharge of the BOG compressor with ambient temperature conditions of 51.6 °C and a pressure of 15.4 kg/cm2G. After manual calculations, there was a decrease in efficiency by 13% from 98% of the design data to 85%, and a decrease in efficiency through Hysys by 21% to 77%. 
Aplikasi Adsorben Nanopartikel Magnetit (Fe3O4) untuk Penyisihan Metilen Biru dari Ferric Nitrate Nonahydrate dengan Metode Sol-Gel Mauli Faulina; Ratna Sari; Nahar Nahar
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.4473

Abstract

The application of magnetite (Fe3O4) nanoparticle adsorbent for the removal of methylene blue from ferric nitrate nonahydrate by sol-gel method. This study was conducted to determine the effect of variations in calcination temperature and stirring time on density, and adsorption power of magnetite (Fe3O4) nanoparticles on methylene blue with variations in stirring time of 2 hours; 3 hours; 4 hours; 5 hours, and 6 hours, as well as variations in calcination temperature of 200°C; 250°C; 300°C; 350°C and 400°C. Characterization of magnetite (Fe3O4) nanoparticles was carried out using XRD, and SEM instruments. Methylene blue concentration after adsorption was measured using Uv-Vis Spectrophotometer. Determination of adsorbent surface area was done by iodine absorption test. The results showed a decrease in density along with the increase in calcination temperature and the longer the stirring, the density value will increase. Magnetite (Fe3O4) nanoparticles effectively increase the adsorption capacity of methylene blue, with the best results at a stirring time of 6 hours and a calcination temperature of 400°C the concentration after adsorption drops to 1.7316 ppm. The best iodine adsorption capacity is found in the sample of 6 hours stirring time and 200°C calcination temperature, which is 1027.89 mg/gr. The crystal size obtained based on calculations from the Scherrer equation at a variation of 3 hours stirring time and 200°C calcination temperature is 0.2 nm and the surface morphological structure of magnetite (Fe3O4) nanoparticles at the same stirring time and calcination temperature looks clustered with sizes ranging from 0.4 nm to 0.9 nm.
Analisis Kinerja Turbocharger pada saat Beban Maksimum Menggunakan Metode RCFA (Root Cause Failure Analysis) di PLTMG Arun Furqan Muhammad Nur; Saifuddin Saifuddin; Muhammad Sami
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.3972

Abstract

Gas engine power plant (PLTMG) is a power plant that uses a gas engine as the prime mover. Prime mover is equipment that has the function of generating the mechanical energy needed to rotate the generator rotor. The Arun PLTMG uses a type 20V34SG wartsila gas engine as the main engine. The 20V34SG type Wartsila engine has replaced several components but has not made the engine performance efficient again. One of the important components in supporting the electricity production process is the turbocharger. A turbocharger is a centrifugal compressor that gets power from a turbine whose power source comes from vehicle exhaust fumes. Usually used in internal combustion engines to increase power output and engine efficiency by increasing the air pressure entering the engine. The purpose of this paper is to calculate the efficiency of the equipment and analyze the results using the RCFA (Root Cause Failure Analysis) method to find out the basic problems that occur in the turbocharger. Based on the results of the calculation analysis showed that the lowest efficiency value for turbocharger A occurred in engine 14, which was 57%, and for turbocharger B efficiency, it was found in engine 13, which only reached 54%. By observing in the field there is oil seepage from the turbocharger which falls into the charge air cooler (CAC) area, wear and tear on the impeller mechanical sealing.
Processing Rumbia Starch Into Glucose Powder by Enzymatic Hydrolysis with Optimum Saccharification Temperature Joan Nasya Alzena; Erwana Dewi; Robert Junaidi
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.4269

Abstract

Glucose powder is glucose in solid form which has the main component of glucose syrup obtained from starch hydrolysis, including sago from rumbia starch. As the population increases, it increases consumption of sugar as a sweetener for basic necessities such as food and drinks, the purposes of this research is identifying the optimum temperature for saccharification of the glucose powder produced from the enzyme hydrolysis process. This research used an enzyme hydrolysis process with the stages of gelatinization, liquification and saccharification for 72 hours with variations in temperature of 40°C, 50°C, 60°C and 70°C and obtained the optimum temperature results from these four temperatures. The optimal saccharification temperature is achieved by incubating at 50°C and 60°C with an incubation time of 72 hours or 3 days
Penggunaan Susu Kambing dan Putih Telur serta Koagulan Ie Asam Sunti pada Pembuatan Tahu Sutera (Tofu) Anisa Putri; Salmyah Salmyah; Ratna Sari
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.4472

Abstract

Silken tofu is a type of tofu that has a soft and compact texture. Ie sunti acid is a by-product of the process of making sunti acid which can be used as a coagulant. The disadvantage of the coagulant, namely sunti acid, is that it produces a silken tofu texture that is not compact. Therefore, cornstarch is added to the production of silken tofu to improve the texture quality of the silken tofu produced. This research aims to determine the effect of increasing coagulant concentration and adding goat's milk and egg white on the characteristics of silken tofu. This research method uses Central Composite Design (CCD) which is included in the Response Surface Method (RSM) and organoleptic methods. With coagulant concentration (2%, 4%, 6%, 8%, 10%) and goat milk volume (100 mL, 200 mL, 300 mL, 400 mL, 500 mL), as well as egg white weight (50 g, 55 g, 60 g, 65 g, 70 g). The results obtained optimal values, namely a goat's milk volume of 300 mL, an egg white weight of 60 g, and a coagulant concentration, namely sunti acid, of 6%, producing a silken tofu texture of 23.5 mm/sec, a pH level of 5 and a fat content of 3.25%. The volume of goat's milk, the weight of egg whites, and the concentration of sunti acid did not affect the color and taste of silken tofu but did affect the aroma of silken tofu
Simulasi Numerik Prarancangan Perpipaan LNG Circulation Line di Aliran Masuk Air Ambient Vaporizer (AAV) Muhammad Ikhsan; Ratna Sari; Reza Fauzan
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.4138

Abstract

The circulation process is a process to make pipes in the LNG industry always in LNG operational cryogenic temperature condition -160° C. The LNG circulation line facility on the AAV inlet pipe is expected to flow LNG continuously as a solution to keep the pipe always in a state of cryogenic temperature. The pressure drop from one point to another with lower pressure is referred to as a "pressure drop. Loss of pressure in the process at the AAV piping system is caused by several parameters including pipe size, flow rate, and pressure also because of a change in pipe size and friction along the pipeline. The purpose of this research is to analyze the effect of pipe size on pressure drop and compare it with theoretical calculations and simulation programming. Hysys is engineering software designed to simulate processes in industry to design process calculations related to engineering. Based on the results of the manual calculation, the 3-inch pipe size has the lowest pressure drop value of 0.314 kg/cm2 and the results using aspen hysys is 0.053 kg/cm2. Using a double pipe piping system, the 4-inch annulus has a pressure drop value of 0.445 kg/cm2, and the result from Aspen Hysys is 0.059 kg/cm2. Pressure drop is significantly influenced by pipe size; the smaller the pressure drop that happens, the greater the pipe size must match the pipe connection size. The pressure drop that occurs in variations in pipe size has a great influence on the LNG flow back into the storage tank.
Ekstraksi Pigmen Betasianin Umbi Bit Merah (Beta Vulgaris L) sebagai Pewarna Rambut Merah Alami dengan Zat Pengikat Mordan Jeruk Nipis (Citrus Aurantifolia) Tia Mauliza; Elwina Elwina; Irwan Nurdin
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.4298

Abstract

Beetroot (Beta vulgaris L) apart from being good for consumption, is also good for use as a natural food coloring and cosmetic preparation. This research aims to make hair dye cosmetics from natural ingredients with a number of benefits that can increase beauty, but do not have side effects on the health of the user or the environment, by using beetroot plants as the main ingredient for the dye, and mordant which is an important component for strengthening the bond between dyes and fibers to prevent fading using lime (Citrus aurantifolia). Extraction of beet tubers was carried out using 70% ethanol solvent using the maceration method. Maceration is carried out for 3x24hours. This research used varying volumes of beetroot 2ml, 4ml, 6ml, 8ml and 10ml, with varying volumes of lime as mordant, namely 0.5ml, 1ml, 1.5ml, 2ml and 2.5ml. The research results showed that the best hair dye with a composition of 10ml of beet root extract with a volume of 2ml and 2.5ml of lime had a pH of 6.20 and 6.12 in accordance with the scalp pH standard, namely 4-6.5 in according to SNI 06-2692-1992, test value the color stability during washing changes on average in the 4th washing, the irritation test value is negative for redness, itching and swelling, indicating that the hair dye preparation does not irritate the skin, the organoleptic test value has an average value for color, aroma and texture of 1.82 and the value of absorbed wadar content of betacyanin pigment was R(Red)123=48.24%.
Ekstrak Kulit Kayu Manis sebagai Inhibitor Korosi pada Baja Karbon dalam Lingkungan Air Laut Ihtisyamuddin .; Selvie Diana; Irwan Irwan
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.3837

Abstract

The utilization of cinnamon bark extract as a corrosion inhibitor of low-carbon steel in seawater media was studied. The purpose of the research was to investigate the effect of cinnamon bark extract concentration and immersion time on the corrosion rate of carbon steel in seawater environments. The study was conducted at different concentrations of cinnamon bark extract, i.e. 0,1, 2, 3, 4, and 5 mL/L, and immersion time. i.e. 5, 10, 15, 20, and 25 days. The research was investigated using standard laboratory corrosion testing material according to ASTM G31-72. The effect of cinnamon bark extract and immersion time was examined on the corrosion rate and efficiency inhibition. The results showed that the concentration of cinnamon bark extract and immersion time influenced the corrosion rate of carbon steel in seawater media. Increasing of concentration of cinnamon bark extract and immersion time decrease of corrosion rate. The lowest corrosion rate obtained was 0.0492 mpy which was received at a cinnamon bark extract of 5 mL/L and immersion time of 25 days. The efficiency inhibition of cinnamon bark extract was increased with increasing immersion time. The highest efficiency was 54,48%.
Penyisihan Logam Berat Besi (Fe) pada Air Sungai Musi secara Kontinyu Menggunakan Karbon Aktif Tongkol Jagung Teraktivasi HCl
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.4108

Abstract

Numerous instances of heavy metal contamination have been documented in Indonesian aquatic ecosystems, prompting the exploration of remediation strategies. Removal of heavy metals can be done by adsorption method. Economical adsorbents have been developed in recent years by utilizing organic waste as activated carbon. Corncob is one of the organic wastes that can be used as activated carbon, thereby reducing environmental pollution and increasing its economic value. The purpose of this study was to obtain the type of activated carbon from corn cobs according to SNI 06-3730-1995 standards and to determine the adsorption capacity of corn cobs for heavy metals in Musi River water using the continuous method. The experimental approach involves continuous flow conditions, with variations in carbonization temperature (300°C and 500°C) and bed height (10 cm and 20 cm). The water from the Musi River, confined within a ten-liter container, was propelled upward, accompanied by flow rate adjustments spanning 10, 15, 20, 25, and 30 mL/minute for 15 minutes, flowing through 2 tubes containing activated carbon. Optimal adsorption efficiency was obtained at a carbonization temperature of 500°C, a flow rate of 15 mL/minute, and a bed height of 20 cm, culminating in a 67% removal rate.

Page 7 of 16 | Total Record : 151

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