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PENGARUH SUPLAI ARUS LISTRIK DAN JUMLAH SEL ELEKTRODA TERHADAP PRODUKSI GAS HIDROGEN DENGAN ELEKTROLIT ASAM SULFAT ., Erlinawati; Zikri, Ahmad
KINETIKA Vol. 5 No. 1 (2014): KINETIKA 01032014
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Utilization of water as an alternative energy one is to turn it into a gaseous form through the process of electrolysis. To change the water into the gas flow of electrical current needed and plate electrodes to decompose water into hydrogen and oxygen gas. Variations of current are 5, 10 and 15 amperes, while for plate electrodes made with dimensions of 96 cm2. From that problem, the prototype of Hydrogen Fuel Reactor is designed. The purpose of this tool is used to generate hydrogen gas. Flow variations and number plate electrode was used as a fixed variable to calculate how the efficiency of the electricity used, Specific Fuel Consume and percent of energy loss. From the calculation, the hydrogen gas produced increases with the amount of electric current is used, the highest hydrogen gas obtained at 15 ampere current and electrode plate 8 which is 0.2324 moles then the lowest 0.1373 mol at 5 ampere current and electrode 4 plates. From electrical efficiency, increasing according to the number plate electrodes is used. The highest efficiency obtained at 5 ampere current and electrode plate 8 which is 41.2020% and 20.5811% the lowest in 15 ampere current and electrode plate 8. As for the percent of heat loss is inversely proportional to the efficiency, the lower the efficiency of the percent of heat loss is greater, and vice versa. While the value of specific fuel consumption (SFC) increased as the amount of electric current that is used.
KONVERSI LIMBAH PLASTIK HIGH DENSITY POLYETHYLENE (HDPE) MENJADI BAHAN BAKAR CAIR (BBC) MENGGUNAKAN KATALIS GAMMA ALUMINA (γ-Al2O3) DAN ZEOLIT ALAM DALAM MULTISTAGE SEPARATOR Aswan1,, Arizal; ., Fatria; ., Erlinawati; Wahab, Fathul; Manggarani, Anindyta
KINETIKA Vol. 11 No. 3 (2020): KINETIKA 01112020
Publisher : Politeknik Negeri Sriwijaya

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Abstract

One of the dominant plastic waste in the world is plastic made from HDPE (High Density Polyethylene). HDPE plastic is often found in the form of plastic bags, food containers, pipe fittings, baby milk bottles, and others. This plastic is not biodegradable, so it can disturb the environment. If destroyed by burning, plastic waste will cause air pollution and cause global warming. One of alternative to reduce the number of this plastic waste is converting HDPE plastic into liquid fuel with a catalytic cracking process. This cracking process uses a Gamma Alumina (γ-Al2O3) and Natural Zeolite catalyst to speed up the reaction to save energy consumption and improve the quality of the product result. The research was conducted by analyzing the effect of temperature variations ranging from 300, 350, 400, 450, and 500 oC. The result shown that the optimum temperature of pyrolysis High Density Polyethylene (HDPE) using Gamma Alumina (γ-Al2O3) catalyst is 400oC with a density 0.7609 gr/cm3, viscosity 1.7760 mm2/s, and flash point 28.8oC. The optimum temperature of pyrolysis using Natural Zeolite catalyst is 450oC with a density 0.7282 gr/cm3, viscosity 2.8164 mm2/s, and flash point 30.9oC. The liquid fuel product from pyrolysis of HDPE plastic waste then analyzed by the GC-MS method, and it can be conclude that the liquid fuel product was a mixture of gasoline (C7-C12) and diesel (C13-C20)
imulasi Prototype Pembangkit Listrik Tenaga Mikrohidro Turbin Crossflow Ditinjau dari Ketinggian, Debit dan Arah Aliran Ridwan, K.A; Lestari, Sutini Pujiastuti; Rusnadi, Irawan; ., Erlinawati; Rahayu, Atika; Mahendra, Evando; Pratama, Wahyudi
KINETIKA Vol. 12 No. 1 (2021): KINETIKA 01032021
Publisher : Politeknik Negeri Sriwijaya

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Abstract

The energy crisis prompted the Indonesian government to change the paradigm towards new and renewable energy, from alternative energy to main energy. In order to overcome the electrical energy crisis, then conducted research on new and renewable energy. Utilization of microhydro based energy generation into one solution to be applied in effort to overcome this crisis. Microhydro power plant (PLTMH) is carried out by utilizing flow velocity (river flow) or head potential (waterfall) with water turbine connected to a generator so that it can convert mechanical energy from the turbine into electrical energy. Type of turbine used is crossflow turbine. This simulation is by varying the head potential (1.6 m, 1.8m, 2 m, 2.2 m, 2.4 m) and the direction of flow (horizontal overshoot, vertical overshoot, and undershoot) generated electrical energy. Based on the research results, the optimal flow direction horizontal overshoot flow which produces flow discharge 20 liter/min, the electrical energy 16 watt, and at height of 2.4 meters and the electrical energy15.3 watt.