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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 The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere.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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Pembuatan Asap Cair (Liquid Smoke) dari Limbah Serbuk Kayu Jati dan Kayu Pinus secara Pirolisis sebagai Pengawet Alami Nurul Izza; Alfian Putra; Zuhra Amalia
Jurnal Teknologi Vol 22, No 2 (2022): Oktober 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i2.3130

Abstract

Research on making liquid smoke from teak and pine sawdust by pyrolysis which will be used as a natural preservative. Pine and teak sawdust carried out a pyrolysis process for 4 hours at a temperature of 400 oC using a pyrolysis reactor with a maximum capacity of 2 kg. The ratio of teak wood powder raw material: pine wood used 1:0; 0:1 and 1:1. Then purified by distillation with a distillation temperature of 100, 101-125, 126-150 oC. Liquid smoke application is used on tofu food with observation time of 2, 3, 4, 5 and 6 days. The quality of the liquid smoke produced is a mixture of sawdust and teak (1:1) at a distillation temperature of 126-150 oC, namely pH 3.1, density 1.028 g/mL and the clearest color and able to preserve food for up to 4 days.
Perancangan Produk Inovatif Alat Bantu Pencekam Kelapa untuk Proses Pembelahan Muhammad Nur; Usman Usman; Azwinur Azwinur
Jurnal Teknologi Vol 22, No 2 (2022): Oktober 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i2.3250

Abstract

The coconut splitting process carried out by Indonesian generally is still using the conventional method, without using tools to grip the coconut. So, it will be at high risk during the coconut splitting process. If an accident occurs, of course it will take a long time for the healing process. Therefore, a new innovation here is needed by designing a coconut splitting tool for the conventional splitting process. The specifications of the tool are planned to be able to withstand a load of 19.62N (2 kg) with a splitting depth of 68mm. For this clamping tool, the material used is ST37. This material was selected because it is easy to obtain, the price is affordable, and the quality is sufficient for such a tool.
Studi Efisiensi Sistem Reduction Gear pada Pembangkit Listrik Tenaga Gas Said Aiyub; M. Ghufran Habibi; Fauzi Fauzi
Jurnal Teknologi Vol 22, No 2 (2022): Oktober 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i2.3252

Abstract

Gas power plants produce electrical energy by a generator driven by a gas turbine through a rotational transmission device called a Reduction Gear. Reduction gear consists of two rotating gears tangent to each other with different diameter sizes. This difference in diameter size makes the output side shaft of the reduction gear, which has a larger diameter, rotate slower than the input side shaft of the reduction gear which has a smaller diameter of the gear. Analysis of the performance of the reduction gear device is done by calculating its efficiency. In this study, the total power loss is 459.18 kW where the gear power loss (Pvz) is 112.53 kW, the bearing power loss (Pvz0) is 342.24 kW, and the power loss due to seals (Pvs) of 4.41 kW. With an input power of 33,000 kW, the efficiency of this reduction gear is 98.61%.
Pembuatan Silika Gel dari Abu Sekam Padi dengan Pereaksi Asam Kuat dan Asam Lemah dengan Menggunakan Variasi Jumlah Abu Silikat Muhammad Riza; Fachraniah Fachraniah; Syafruddin Syafruddin
Jurnal Teknologi Vol 22, No 2 (2022): Oktober 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i2.3116

Abstract

The Research has been carried out on the making of silica gel from rice husk ash with strong and weak acid reagents using variations in the amount of silicate ash as much as 50, 100, 200 and 300 grams by using hydrochloric acid, nitric acid, acetic acid and citric acid as solvents. This study aims to obtain the effect of the type acid and variations in the amount silicate on the characteristics of silica gel products and as a method of applying adsorption to H2O. The silica gel test resulted from the yield test, water content, ash content, I2 adsorption power, application of adsorption power to H2O and the best product test using FTIR. The more amount of silicate used will affect the quality of silica gel obtained from the results of testing and calculations, optimal result silica gel obtained with amount of silicate ash is 50 grams. The higher amount of silicate ash used, the results obtained will increase. Optimal results obtained from silica gel in hydrochloric acid with the amount of silicate ash 50 grams, where the yield is 17.86%, water content is 4%, ash content is 11% and I2 adsorption power is 1218.24 mg/g. The application of H2O adsorption power is obtained the more amount of silicate used, the higher H2O absorption results. Optimal results obtained from silica gel in hydrochloric acid with the amount of silicate ash 50 grams, where the adsorption power of H2O is 9.6 mL/g. And finally, the best product test using FTIR is hydrochloric acid and nitric acid.
Analisis Volume LNG Ideal untuk Cooling Down Fasilitas LNG Hub Dhian Nugraha; Harunsyah Harunsyah; Munawar Munawar
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.v23i1.3687

Abstract

The LNG Receiving Hub facility is an existing facility that has not been used for a long time. In order for this facility can be used again, all equipment and piping systems must first be conditioned to a temperature close to the operational temperature of LNG, which is -160 oC. The purpose of this approach is to determine the theoretical and actual volume of LNG used for the cooling down process of the LNG Hub facility, as well as to compare it with the cooling down process for the regasification facility. An analytical approach is used in this study to determine the ideal amount of LNG needed for cooling down the facility and compare it with the actual amount of LNG that is being used for cooling down the facility. From the results of the analysis, the theoretical LNG volume needed for cooling down the LNG Hub facility is 8,176 m3 and the actual volume is 7,013.6620 m3, while the actual value for cooling down the regasification facility is 11,573.19 m3. The actual volume for the LNG Hub facility is smaller compared to regasification which can be caused by the smaller volume of pipelines and the difference in the cooling down mechanism in both facilities.
Analisis Termal Stainless Steel Ice Cubes dengan Menggunakan Sensor Termokopel DS18B20 Berbasis Arduino Luthfi Luthfi
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.v23i1.3839

Abstract

Stainless ice cubes as reusable ice packs have recently become more popular for cooling food and beverages. Compared to ordinary water-based ice cubes, they will not alter the taste as they do not melt and mix with food/drink, and in the long run, they can save money as they can be reused. Due to little information on their technical performance in the literature, this study will investigate their thermal characteristics, especially when compared to water ice cubes and custom-made stainless ice cubes. A water-proved temperature measurement system consisting of 5 pieces of DS18B20 thermocouple sensor controlled by Arduino UNO DIP Microcontroller was built and tested for this purpose. The tests were conducted on three separate drinking glasses containing three different ice cubes. The measurement system successfully revealed the temperature evolution of the three types of ice cubes. Water ice cubes still produced the coldest water temperature, although the commercial ice cubes purchased from the online market are not too far behind. Custom-made ice cubes containing no Phase Change Material (PCM) substance inside them do not significantly cool the water. 
Pengaruh Penambahan Saccharomyces Cerevisiae dan Aspergillus Oryzae terhadap Karakteristik Eco-Enzyme serta Pengaplikasiannya dalam Pembuatan Sabun Padat Antiseptik safrida Safrida; Suryani Suryani; Zuhra Amalia
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.v23i1.3715

Abstract

The production of eco-enzyme usually takes a long time for fermentation, which is three months using natural microbes found in fruit peels. This research is experimental by focusing on accelerating the production of the eco-enzyme using two types of microbes, namely saccharomyces cerevisiae and aspergillus oryzae whose mass is varied by 5 variations, and the fermentation time is set for 20 days. The results showed that the eco-enzyme made by adding microbes had the same characteristics as the natural fermentation eco-enzyme. Furthermore, the eco-enzyme obtained from the research was added as an antiseptic in making solid soap. From the test results, the best inhibitory power was obtained in the eco-enzyme with the addition of saccharomyces cerevisiae as much as 10 g and aspergillus oryzae as much as 25 g. The inhibitory power test was carried out by comparing the number of bacteria present on unwashed hands with hands that had been washed using soap. The test results showed the number of bacteria on unwashed hands was 85 CFU, which were washed using samples with aspergillus oryzae as much as 4 CFU, with saccharomyces cerevisiae as much as 2 CFU, this inhibition is better than commercial antiseptic soap with a total of 8 CFU
Perancangan Mesin Pencacah Limbah Kelapa Muda Secara Vertikal Menggunakan Metode Sintesis Pandangan Robert Napitupulu, S.ST., M.T.; Yuli Dharta; Diviya Arsieka Putri; Devaned Parlindungan; Aldi Pratama; Clara Lavita Angelina
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.v23i1.3781

Abstract

Increasing consumption of young coconuts (known as "Kelamud") is leading to a rise in the amount of waste generated by these coconuts. A group is using this waste as a raw material for the production of compost fertilizer for oil palm trees. However, the process is still performed manually by chopping waste with a machete of 15-20 mm thickness, which takes a considerable amount of time. This research aims to design and construct a machine for vertically chopping coconut waste. The proposed research method is a synthesis strategy that combines design concepts with the steps of clarifying and translating the client's desires. Then, these desires are incorporated into the machine design procedure by making selections, analyzing the interdependence and interrelationships between the selections, assessing trade-offs, and evaluating the outcomes of these selections. The final design of the Kelamud chopper machine consists of a motor with a 5.5 horsepower gasoline engine, a chopping system with a four-blade knife system, and a transmission system with pulleys and belts. Based on the results of the tests, the machine is capable of chopping waste from young coconuts with a capacity of 232.62 kg/hour in fibrous properties.
Optimasi Kinerja Wellstream Cooler Sebagai Sistem Pendinginan Gas Alam dari Sumuran terhadap Pengaruh Laju Alir dan Perbedaan Suhu Lingkungan di Platform PHE NSO Offshore Teuku Tarich Akbar; Reza Fauzan; Alfian Putra
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.v23i1.3602

Abstract

This gas source that comes from the bowels of the earth contains many impurities and heavy hydrocarbons, both of which must be separated or even eliminated. To purify the treated gas to prevent damage to process equipment or pipe clogging. The removal process includes H2S removal, CO2 removal, oily water removal, mercury removal, and water content removal in natural gas. This study aims to determine the effect of flow rate and ambient temperature differences on the performance of the wellstream cooler and the level of efficiency of the heat transfer process in the wellstream cooler. Observations will be focused on the offshore platform wellstream cooler cooling system at PT. PHE NSO. Based on observational data, the results obtained using the Hysys method by entering the required data completely, Hysys will automatically perform calculations according to what is required and the calculation results will be plotted in graphical form. Heat transfer efficiency based on Hysys application calculations all show results of 99%. Thus it can be seen the effect of changes in flow rate and ambient temperature on the heat transfer process. The greater the flow rate, the greater the heat transfer that occurs and the higher the ambient temperature, the smaller the heat transfer occurs, so that the lower the ambient temperature, the more effective the heat transfer occurs.
Antena Bowtie dengan Reflektor Parabola untuk Layanan Broadband Wireless Access Munawar Munawar
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.v23i1.3819

Abstract

Broadband Wireless Access (BWA) is useful for spreading and improving internet services evenly to all regions in Indonesia. While the frequency spectrum used in this Broadband Wireless Access (BWA) service is 2.3 GHz. The antenna gain test method is carried out with 3 antenna models working at the same frequency, and before the gain test is carried out, it is confirmed that the Voltage Standing Wave Ratio (VSWR) value ≤ 2 on the 2.3 GHz frequency spectrum. The test results of the parabolic Bowtie reflector antenna show that the gain value for each diameter is 6.35 dB, 7.3 dB, 7.45 dB, and 12.45 dB respectively. And the distance from the focus of the antenna to the reflector affects the Gain value for each reflector size. This antenna polarization is directional and the larger the diameter the higher the directivity value.

Page 6 of 16 | Total Record : 151

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