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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 The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere.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 76 Documents
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EFEKTIFITAS PENGGUNAAN PAKU DAN SEKRUP PADA PAPAN BLOK BERBASIS INTI KOMPOSIT PARTIKEL KAYU KELAPA SAWIT Indra Mawardi; - Hanif; - Ramli
Jurnal Teknologi Vol 14, No 1 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i1.256

Abstract

Blockboard  for industrial furniture is not only enough to meet mechanical properties, but also ease the  forming process. The use of nails and screw was determined in the process of forming blockboard. The purpose of this research is to study the effectiveness of using  nails and screw on blockboard that uses the core palm oil wood particles. This research is expected later on benefics to the furniture industry  in using the appropriate nails and screw to the blockboard using the core palm oil wood particles. The nails and screw with a different diameter was used in the test of blockboard. Nailers is used specifically to wood and nails concrete, with 50 mm long  and  2,5 and 3 mm diameter. The results showed the positive and negative effectiveness of using nailers on  the core. The used of screw on both surface and core of the blokboard showed the positive result. The smaller diameter nailers used  the more effective will be on the core
OPTIMASI PROSES KONVERSI BIODIESEL DARI MINYAK JARAK DENGAN BIOKATALIS LIPASE CANDIDA SP - Salmyah; - Syahiddin; Muhammad Zaki
Jurnal Teknologi Vol 14, No 2 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i2.243

Abstract

The research on the enzymatic synthesis of biodiesel from castor oil has been done. Some of the variables studied were the comparison of methanol and oil (X1), the amount of lipase enzyme (X2) and the reaction time (X3). The mathematical model that describes the relationship between the yield and the dependence variables was developed. According to the research, the yield of biodiesel obtained was in the range of 60% to 98%. The optimum conversion process was in the ratio methanol and oil of 5:1. Furthermore, the addition of 1 ml of enzyme and the reaction time of 12 hours produce 94% yield of biodiesel. Finally, the composition of the biodiesel was analyzed using Chromathography Mass Spectrometry, where palmitic acid 3.95% area, linoleic acid 7.14% area, 77.61% oleic acid area, and stearic acid 8.97% area was achieved
Pengaruh Pengelasan dan Media Quenching Terhadap Kekuatan Tarik dan Kekerasan Material ASTM A 36 Hamdani Hamdani; Jufriadi Jufriadi; Ariefin Ariefin; Edi Saputra; Mohd. Ghiffari
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (329.503 KB) | DOI: 10.30811/teknologi.v21i2.2430

Abstract

In this study the tensile strength and hardness of ASTM A36 material that weld by SMAW process with variations in cooling media, namely seawater, air, and oil. The highest tensile strength value is 81.16 Kgf/mm2 with seawater cooling media. The highest hardness value in the base metal area is 93.5 HRC with oil cooling treatment. The highest hardness value in the weld metal on specimens using air cooling treatment is 93.33 HRC. The highest hardness value in the HAZ area is in the specimens using seawater cooling treatment with a value of 90.83 HRC. The Phase change during quenching proses with different media probably affects the mechanical properties of ASTM A36 material.
Design of On Load Tap Changing Transformer (OLTC) to Increase Photovoltaic Penetration Level in Low Voltage Distribution Feeder Radhiah Radhiah
Jurnal Teknologi Vol 21, No 1 (2021): April 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (696.997 KB) | DOI: 10.30811/teknologi.v21i1.2194

Abstract

This paper investigates a method for regulating the voltage profile and reducing the voltage unbalance at low voltage (LV) residential feeders with single-phase rooftop photovoltaic (PV) installed randomly along with the feeders. The used algorithm considers the distribution transformers that have on-load tap changers (OLTC) and can automatically control the voltage to prevent voltage rise in the feeder. MATLAB-based simulation results demonstrate the effectiveness of the discussed approaches.
ANALISIS PARAMETER NETWORK SENTRAL NEAX 61EDI PT. TELKOM LHOKSEUMAWE - Nasri
Jurnal Teknologi Vol 14, No 1 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i1.264

Abstract

The main objective of this study was to determine the quality of the communication path or circuit switching networks in Central Phone type NEAX 61E in PT. Telkom Lhokseumawe by analyzing traffic data and from 1 January to December,  2011 . The research method was performed  by taking the data and observing the data of the central type . Observations were carried out by using the parameters MHTS (Mean Holding Time Per Seizure) , SCH (Seizure per circuit per hour) , GoS (Grade of Service), OCC (Occupancy Circuit), and ASR (Answered Seizure Ratio). The results showed that in February links Banda Aceh had   285.4 minutes at a density of 1.5 calls Call/circuits . Seizure per circuit hour   (SCH) with the highest number of calls reached 12.9 1.65794 million calls. Hence, lower SCH would provide insufficient circuit,. Standards set by PT. Telkom did not exceed 24 call/circuit and effectiveness of call in the circuit should not be more than 2 minutes, so the conditions provided by the PT. Telkom is not good because of the density and the call do not occur with a low MHTS
Konversi Pelumas SAE 5W-30 Bekas Menjadi Bahan Bakar Cair Dengan Proses Hydrocracking Berbasis Katalis Yohandri Bow; Sutini Pujiastuti Lestari; Fatria Fatria; Muhammad Reza Ramlan; Heru Afriansyah; Miranda Roulina
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.395 KB) | DOI: 10.30811/teknologi.v21i2.2435

Abstract

The number of passenger automobiles, buses, cargo cars, and motorcyclists on the road in Indonesia continues to rise year after year. According to the Central Statistics Agency, the number of transportation equipment in 2015 was 105,303,318 million, up 6.5 percent from the previous year. In 2016, it was 112,205.711 million, up 6.5 percent. As can be seen from the above, Indonesia's transportation options are expanding throughout time. As a result, the demand for lubricants rises as well. As the need for lubricants grows, so does the amount of spent lubricants that is thrown away. Water absorption is inhibited by used lubricant waste that is disposed of in the soil. Given the aforementioned issues, a solution for converting spent lubricant waste into something more useful, such as liquid fuel, is required. Making a prototype for turning spent SAE 5W-30 lubricant waste into liquid fuel using the hydrocracking method with the help of a Ni/ZAA catalyst is one approach to go about it. The effect of temperature fluctuations of 300 °C, 350 °C, 400 °C, 450 °C, and 500 °C was employed as the independent variable in this investigation. The amount of used lubricant feed used in this investigation is 641.10 ml, which is a fixed variable. The best yield values were obtained at a temperature of 400 °C with a cetane number of 76.2, which met the diesel requirement.
IDENTIFIKASI JENIS KAYU BERBASIS CITRA MENGGUNAKAN PROBABILISTIC NEURAL NETWORK (PNN) Ismi Amalia
Jurnal Teknologi Vol 14, No 2 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i2.248

Abstract

The purpose of this research is to identify the types of wood based on imagery by using PNN method. In this paper, gray level co-occurence matrix (GLCM) is used as texture classification techniques. The GLCMs are generated to obtain three features: autocorrelation, cluster shade and sum variance. The classification technique used to classify the wood species is a probabilistic neural network (PNN). This research was carried out using 12 different types of wood. For each type of wood, 6 images were collected. The images of wood were divided in two sets: training set and test set. The leave-one-out cross-validation technique was applied for model validation. Our experimental results showed that the proposed method can increase the recognition rate up to 80.55%. The result of this research indicated that three features of GLCM are accurate to distinguish types of wood. This research used only a small-size dataset, so for further research is needed to use more feature extract methods and types of wood
Perbaikan Algoritma Naive Bayes Classifier Menggunakan Teknik Laplacian Correction Muhammad Rizki; Muhammad Arhami; Huzeni Huzeni
Jurnal Teknologi Vol 21, No 1 (2021): April 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (569.276 KB) | DOI: 10.30811/teknologi.v21i1.2209

Abstract

Naïve Bayes Classifier is one of the classification algorithms in Data Mining with a good processing speed and a fairly high level of accuracy. In the classification process the Naïve Bayes Classifier adopts the Bayesian theorem to map a data against a class by taking into account the probability of the attribute data, but because the Naïve Bayes Classifier makes probability the basis for its calculations, it is certainly very risk if it is wrong. If one class that is contained in the attribute has a value of 0, this will reduce the level of accuracy of the classification process carried out by the Naïve Bayes Classifier algorithm itself, therefore in this study the Laplacian Correction technique is used as an alternative to fix the problems that are owned by the Naïve Bayes Classifier Algorithm. The result of this research is that the Laplace Correction technique has succeeded in improving the performance of the Naïve Bayes Classifier by fixing the 0 value for each attribute. The level of accuracy that is owned by the Naïve Bayes Classifier after experiencing improvements with the Laplacian correction technique is 94.44%.
Aplikasi Katalis Heterogen (H-Zeolit) pada Prototype Fluidized Bed Reactor Secara Batch untuk Produksi Biodiesel dari Fatty Acid Methyl Ester Furia Andani; Pardi -; Eka Kurniasih
Jurnal Teknologi Vol 16, No 1 (2016): April 2016
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.877 KB) | DOI: 10.30811/teknologi.v16i1.324

Abstract

Biodiesel is an alternative energy diesel / solar is usually produced through esterification and transesterification. Usually biodiesel produced using a homogeneous catalyst (alkaline/acid). There are weaknesses in homogeneous alkaline catalysts (KOH and NaOH), the soap will appear at the end of the biodiesel production process and very difficult when the separation (separation). Heterogeneous catalyst is a homogeneous catalyst solution to replace due to different phase reactants, a heterogeneous catalyst is zeolite, zeolite catalyst are very easily separated and do not form soap at the end of the biodiesel production process. In previous research, biodiesel is produced using a laboratory scale reactor neck flask 3. Therefore, in this research developed the biodiesel production process of fatty acid methyl ester (FAME) using zeolite catalyst H+ in the fluidized bed reactor prototype. Zeolite catalyst performance can be enlarged with the filling material into the zeolite KI. Prototype fluidized bed reactor is operated at the speed of the flow rate of 5 liter / min and the fluidization in the reactor with the minimum fluidization velocity 1.24 cm/s, the weight ratio of zeolite catalyst 2.5% (w/w), mole ratio of methanol : FAME conversion of methyl ester obtained in the 80 minute, is 69.58%
AUDIT ENERGI DAN ANALISIS PELUANG PENGHEMATAN ENERGI LISTRIK PADA SISTEM PENGKONDISIAN UDARA KANTOR PUSAT ADMINISTRASI POLITEKNIK NEGERI LHOKSEUMAWE - Syamsuar
Jurnal Teknologi Vol 14, No 1 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i1.258

Abstract

This research was conducted at the main office administration building (KPA) of Lhokseumawe State Polytecnic to audit the use of energy and to analyze the possibilities of electrical energy saving opportunities in the building. The method used in the research is six sigma method with DMAIC (Define, Measurement, Analyze, Improvementdan Control) by not ignoring the level of comfort with National Standards of Comfort (SNI). From the research, it was found that the value of the intensity of energy consumption (IKE) of KPA is 186.44 KWH/m2.year, the rate is higher than IKE of developed countries  have implemented to inferior building energy consumption which is below 150 KWH/m2.year. If it is referred to IKE standard, then the use of energy in KPA building is inefficient. The measurement showed that the burden of cooling actual averege reached 14 .472,73 Watt.hour. The result of analysis found that there has been an overload cooling load on STU system building. On the space of improvement set, some solutions for repairing of categorial air system can be done by minimizing the factors that caused  over cooling load , the result of repairs showed a load of cooling which is 10.970,33 Watt.hour and it means the savings did happen for 3502,4 Watt.hour or 24,2 %, or per mounth the electric energy saving reached 963,65 Kwh/mounth or equivalent to 11.563,88 Kwh per year. In the space of control aims to evaluate and monitor the result of the implementation in the grouned in order to be able to maintain the value of burden of cooling at the standard level or needed level

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