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<![CDATA[PREPARASI EKSTRAK BAYAM MERAH (AMARANTHUS GANGETICUS) UNTUK APLIKASI DYE SENSITIZED SOLAR CELL (DSSC) ]]>
<![CDATA[Farradina Choria Suci]]>;
<![CDATA[Arnisa Stefanie]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.147-154
<![CDATA[Solar energy is the most beneficial renewable energy, because it is not limited, not called by geographical location, and not environmental pollution. Solar energy can be converted into electrical energy using Solar Cells. Dye Sensitized Solar Cell (DSSC) is a form of renewable energy with several advantages, such as low fabrication costs and high photoelectric efficiency. The structure of the DSSC device consists of five components, namely conductive substrate, semiconductor filmization, sensors, redox in the form of electrolytes and opposing electrodes. The proper use of semiconductor materials and photosensitizers can produce high photoelectric power. Included in the DSSC application, dyestuff is a component that has an important role. In this study, dye extraction was done using red spinach leaves (Amaranthus gangeticus) with maceration techniques. Red spinach is one potential that can be developed into dyes because the red color of spinach contains natural pigments. Red spinach extract uses maceration techniques because of simple and sophisticated workmanship that is simple. The results of the red spinach extract were then tested using UV-Vis, FTIR, and cyclic voltammetry.]]>
<![CDATA[PERANCANGAN REAKTOR UNTUK PRODUKSI BIODIESEL GENERASI 2 DARI BIOMASA SAWIT ]]>
<![CDATA[Maharani Dewi Solikhah]]>;
<![CDATA[Adi Prismantoko]]>;
<![CDATA[Adinda Prawitasari]]>;
<![CDATA[Bina Restituta Barus]]>;
<![CDATA[Agus Kismanto]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.197-212
<![CDATA[Indonesia has abundance of biomass that underutilized, including oil palm biomass in such as empty fruit bunches and palm fronds. The biomass can be converted into biohydrocarbons through a pyrolysis process that produces bio-oil and followed by an up-grading process to improve its quality. Upgrading Bio-oil into biohydrocarbons can be conducted through various production processes, including hydrothermal processes. Bio-oil has different chacateristic compared to diesel fuel. Bio-oil has a high water content (11-50%), high acidity, and high viscosity (> 40 cP). Based on these characteristics, the hydrothermal process has the advantage of being able to operate with raw materials that have a high water content. The operating conditions of the hydrothermal process are 300 – 400 oC, 150 – 200 bar. For this reason, a bio-oil upgrading reactor was designed using a hydrothermal process to operate at a temperature of 420 oC and a pressure of up to 220 bar.]]>
<![CDATA[PENGGUNAAN METANOL SISA REAKSI SEBAGAI REAKTAN PADA PROSES TRANSESTERIFIKASI MINYAK KELAPA SAWIT MENJADI BIODIESEL ]]>
<![CDATA[Elvianto Dwi Daryono]]>;
<![CDATA[Febriara Fassa Aulia Rahman]]>;
<![CDATA[Zukhriyah Zukhriyah]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.155-162
<![CDATA[In the process of making biodiesel with a transesterification reaction, an effective, efficient and inexpensive raw material is palm oil because of its abundant availability. In the transesterification process, the addition of methanol is deliberately exaggerated so that the reaction shifts towards the product and the reaction is more perfect and the excess methanol reagents in the process can be reused as reactants. This research was conducted to obtain optimal levels and yield of methyl esters by utilizing the residual methanol reaction. The transesterification process is carried out at 65°C, the molar ratio of palm oil: methanol is 1: 6, the mass of NaOH catalyst is 1% oil mass and the stirring speed is 150 rpm. The residual methanol from the transesterification reaction is used as a reactant in the subsequent transesterification reaction by varying the mass of the remaining methanol addition of the reaction which is 5%, 10% and 15% of the mass of the initial methanol and also varying the reaction time of 15, 30, 45, 60 and 75 minutes. From the results of the research, it was obtained the optimum conditions for the addition of 5% residual reaction methanol and 60 minutes reaction time, get a yield of 90.60% and a concentration of methyl ester 97.69% (meet SNI 7182: 2015). Methyl ester products at the optimum process conditions also meet SNI 7182: 2015 for densities of 0.85 gr / ml and acid valuesof0.42mg-KOH/gr.]]>
<![CDATA[SISTEM INFORMASI MANAJEMEN ASET MENGGUNAKAN METODE GARIS LURUS DAN MULTI ATTRIBUTE UTILITY THEORY (STUDI KASUS : SMAN 3 CIMAHI) ]]>
<![CDATA[Tasya Wiendhyra]]>;
<![CDATA[Nisa Hanum Harani]]>;
<![CDATA[Roni Habibi]]>;
<![CDATA[Rolly Maulana Awangga]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.213-220
<![CDATA[Asset management carried out by SMA Negeri 3 Cimahi is intended to manage assets at the school to support education and teaching and learning activities at schools. Asset management has been managed by the head of the asset warehouse. The whole process is still done manually by written it out then transferred to Microsoft Excel. For borrowing still use manual forms that are not compiled according to the year and existing items. In impairment of asset, there is no recommendation for deletion that can facilitate decision making for asset deletion. Based on these problems, it is necessary to make an information system that can handle the asset management process. This information system is used by three Users, namely the Principal, the warehouse (asset) and the facility wakasek. The method of depreciation of assets used to perform calculations in this study is a straight line. Then the method for making decisions on goods to be deleted is the Multi-Attribute Utility Theory method with 3 criteria, condition of the goods, book value, and the remaining economic life. This information system is web-based to increase the efficiency of schools in using information technology. The calculation tests carried out using the system and manual get the same results, the straight-line method on school desk assets purchased in 2018 at a price of 4,000,000, the depreciation on this month is 358,568. And for the Multi Attribute Utility Theory method, a recommendation for removal is obtained, namely a wooden cabinet with a final value of 0.8.]]>
<![CDATA[EVALUASI KOMPETENSI INDUSTRI 4.0 PADA TENAGA KERJA INDUSTRI DI KABUPATEN KARAWANG ]]>
<![CDATA[Dimas Syaripudin]]>;
<![CDATA[Rianita Puspa Sari]]>;
<![CDATA[Aulia Fashanah Hadining]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.163-172
<![CDATA[Industry 4.0 is called the fourth industrial revolution which brings a paradigm shift in the production industry so that it gives a big impact on the industrial value chain. The concept of industry 4.0 illustrates the increase in digitalization of the entire value chain and results in the interconnection between people, objects and systems through real-time data exchange so that this will be a challenge for companies is facing charges in the era of the industrial revolution 4.0. in this change the company effectively needs to plan for sustainable human resource development. The characteristics of Industry 4.0 that tend to focus on technology and ultimately create a gap between competencies and the expertise needed by Industry 4.0. Therefore, companies need a competency model that is needed by suitable industrial workers in facing industry challenges 4.0. This study aims to analyze the results of the evaluation of employee competencies in companies in the district. Karawang. Employee competency evaluation at companies in the district. Karawang uses multidimensional scaling analysis methods, importance-performance analysis and gap analysis, and radar chart analysis. Based on the results of the study, the multidimensional scaling method aimed at the similarity of characteristics in the use of social competencies and personal competencies of employees in Kab. Karawang has a high similarity of characteristics with the stress value on the perception map of 0.146 or 15% and the R2 value generated is 0.907 or 91%. The largest gap value is owned by the construct of Industry 4.0 competencies with a value of -0.99. The smallest gap value is assumed by the construct of Technical competencies with a value of -0.45. priority levels of competency that need to be improved by employees in Kab. Karawang in the industrial era 4.0 was categorized in the main priorities: social competencies and industry 4.0 competencies, the category of maintaining achievement: Personal competencies and excessive categories: methodological competencies and technical competencies.]]>
<![CDATA[PENGARUH COATING KITOSAN DENGAN PENAMBAHAN ANTIOKSIDAN ALAMI TERHADAP KUALITAS FISIK DAN MIKROBIOLOGI FILLET IKAN: KAJIAN PUSTAKA ]]>
<![CDATA[Sarah Smith]]>;
<![CDATA[Hermawan Seftiono]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.183-196
<![CDATA[The effect of chitosan coating incorporated with natural antioxidants on the quality of fish fillets stored in refrigerated storage (4 °C) for 16 days was studied and compared. The control samples (without any coating), chitosan coating, and chitosan coating incorporated with several natural antioxidants based on studies were analyzed by physical and microbiological qualities. Gallic acid (3%), rosmarinic acid (0.3%), and 6-gingerol (2%) could effectively retard physical deterioration and microorganism activity based on 25 studies. Compared to the control and chitosan coating, samples treated with chitosan and gallic acid (3%) coatings significantly maintain physical and microbial quality of fish fillets during storage.]]>
<![CDATA[STUDI EKSPERIMENTAL PERPINDAHAN PANAS DAN PENURUNAN TEKANAN DARI HIBRIDA NANOFLUIDA DI PENDINGIN RADIATOR MOBIL ]]>
<![CDATA[Ery Diniardi]]>;
<![CDATA[Hasan Basri]]>;
<![CDATA[Anwar Ilmar Ramadhan]]>;
<![CDATA[Deni Almanda]]>;
<![CDATA[Alvika Meta Sari]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.221-232
<![CDATA[The use of nanoparticle coolants in car radiators increases the rate of heat transfer and allows for a smaller overall radiator size. The transfer characteristics of hybrid nanofluids with various compositions of TiO2-SiO2 (40:60, 60:40, 80:20) based water/EG nanoparticles for a volume concentration of 1.0% were investigated experimentally. By dispersing the hybrid nanofluids in a mixture of water/ethylene glycol (60:40), the composition of the TiO2-SiO2 nanoparticles (40:60, 60:40, 80:20) was varied for a volume concentration of 1.0%. Experiments were carried out using a coolant flow rate between 2-12 LPM for a working fluid temperature of 70 °C, while the air flow velocity remained constant at an average of 4 m/s, to understand the effect of coolant flow velocity on heat transfer. The thermal performance of hybrid nanofluids in a water/EG mixture (60:40) was investigated for variations in the composition of TiO2-SiO2 nanoparticles (40:60, 60:40, 80:20) for a volume concentration of 1.0% and a working temperature of 70 °C. The heat transfer coefficient obtained is 32.1%, the maximum increase occurs in the TiO2-SiO2 nanofluid with the composition (40:60), while the 29.2% increase occurs in the nanofluid hybrid (60:40), for the nanofluid hybrid (80:20) it is an increase of 31.1%.]]>
<![CDATA[PERANCANGAN AWAL LAMBUNG KAPAL KEPRESIDENAN DARI KOMPOSIT WOVEN KEVLAR-RAMI-POLYESTER ]]>
<![CDATA[Budiman Adi Setyawan]]>;
<![CDATA[Amir Marasabessy]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.173-182
<![CDATA[The unitary state of the Republic of Indonesia consists of thousands of islands scattered from Sabang to Merauke. The foremost islands in Indonesia are rarely visited by the President of the Republic of Indonesia, which may be one of the reasons why there are no marine service vehicles such as on land and in the air. Therefore we need a very special marine vessel (VVIP) made of selected materials. Some of the requirements that must be met are light, fast, bullet proof, anti-fire, safe and comfortable for the occupants. The most important part of a ship is the hull. The hull must be made of very strong materials such as Kevlar,Polyester and Jute. These materials have been widely used for military purposes. The main material for the hull of the ship,namely Kevlar, jute and polyester composites are tested for quality to meet SNI/ISO standards. The test results on Kevlar, Polyester and Jute materials are that the weight of Kevlar HT1 is 130 g/m2 and Polyester /Jute 65/35% 210 g /m2 (SNI / ISO 3801: 2010). The tensile strength of HT1 kevlar is 5300 N/5 cm (H/V) (ISO 13934-1) and Polyester/Jute 65/35%, 885.42 N/2.5 cm (H), 403.83 N/2, 5 cm (V) (SNI 0276: 2009). The number of warp and weft of Kevlar HT1 was 10 strands / 1.0 cm (ISO 7211-2) and the amount of warp and weft Polyester /Jute 65/35% is 41 strands / 1.0 cm (V) and 22 strands / 1.0 cm (H) (SNI / ISO 7211-2: 2010). The pattern of Kevlar HT1 is plate and 65/35% Polyester /Jute is keper 2/1 (SNI / ISO 7211-1: 2010).]]>
<![CDATA[PROSES PENGERINGAN DAN EKSTRAKSI ULTRASONIK DAUN KERSEN (MUNTINGIA CALABURA L.) SEBAGAI ANTIOKSIDAN POTENSIAL ]]>
<![CDATA[Ayu Candraningsih]]>;
<![CDATA[Ismiyati Ismiyati]]>;
<![CDATA[Nurul Hidayati Fithriyah]]>;
<![CDATA[Tri Yuni Hendrawati]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.247-254
<![CDATA[Kersen (Muntingia calabura L.) is a tropical plant from the Muntingiaceae family which is a wild plant that is often found in Indonesia. This plant is one of the herbal plants that are used as natural antioxidants. The purpose of this study was to obtain a drying model of cherry leaf extract and determine the activity of flavonoids as antioxidants in cherry leaf extract. The method used to obtain cherry leaf extract using ultrasonic sonication with a wavelength of 40 kHz. Variations made in the test are the length of drying time (30 minutes, 45 minutes, 60 minutes, 90 minutes, 120 minutes) and to find the most suitable drying model between Newton and Page. Concentration of cherry leaf extract using a rotary vacuum evaporator. Identification of cherry leaf extract, namely: determining the absorbance value for flavonoids and IC50 (Inhibitor Concentration) using UV-Vis Spectrophotometry and then determining the antioxidant content. The results of the study obtained that the highest wet extract yield was treated with a drying time of 30 minutes, which was 34.1%. The highest total flavonoid content was found in the 30 minute drying time treatment, which was 51,067 g/ml. The test of antioxidant levels obtained by IC50 is 0.89 ppm which is a strong antioxidant. The most suitable drying model is the Newton drying model with the equation MR=exp-(0.0029t) with a value of R2 = 0.9867 with k = 0.0029.]]>
<![CDATA[ANALISIS PERFORMANSI BAHAN BAKAR PREMIUM DAN PERTAMAX DENGAN RING BENSIN OPTION R TERHADAP DAYA DAN TORSI PADA SEPEDA MOTOR 4 TAK ]]>
<![CDATA[Anwar Ilmar Ramadhan]]>;
<![CDATA[Thomas Djunaedi]]>;
<![CDATA[Irwan Firmansyah]]>
<![CDATA[ Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jurtek.14.2.255-264
<![CDATA[The development of the world in the automotive field is now growing and growing rapidly. Very rapid development in the field of automotive motor vehicles, But what we already know with the thinning. Fuel is a problem we face today. As for finding a tool that can save fuel motor vehicles. R option gasoline ring is a fuel saver tool made of stainless steel that has 12,400 gauss magnets that have 1 inlet and 1 outlet. Analysis of the performance of premium fuel and pertamax with the option of gasoline R ring is done to know the ratio of power, torque and premium AFR and pertamax, both before and. The test results and calculations for the premium variables obtained power up to 0,2 HP, torque up by 3%, AFR more efficient 7.4%. While for the pertamax variable in getting power up to 0,2 HP, torque rose by 5.3%, AFR more efficient 8.4%.]]>
