ABSTRACT The three-phase induction motor is the most widely used alternating current (ac) motor. Its name is in accordance with its working principle where the motor rotor current is an induced current as a result of the relative difference between the rotor rotation and the rotating field generated by the stator current. An induction motor works well if the voltage and speed are constant. If …
ABSTRACT 5G technology is urgently needed at this time to support the advancement of the telecommunication system. One of the tools needed to support this is to provide 5G technology devices such as antenna. Antenna with 5G technology is expected to have better specifications than before to provide better telecommunications services. The crucial specification in 5G technology is beamforming. T…
ABSTRACT The rapid development of technology and telecommunications has led to the need for telecommunications equipment that has high capabilities to support the performance of the device in processing various things such as voice, data, video, and also online games. The device is connected to the 5G network which has now entered Indonesia. The use of 5G networks is expected to increase commu…
ABSTRACT Population growth that continues to increase has an impact on the high demand for electrical energy and the generation of waste that is increasingly piling up. By utilizing waste as raw material for a Waste Power Plant (PLTSa) to be one solution that can be done to overcome the problem of waste and the fulfillment of electricity supply. The abundant availability of waste makes the cos…
ABSTRACT Honey not only contains sweeteners or food flavorings, but honey also contains very essential nutrients. Honey is produced by honey bees by utilizing plant flowers. In this study, the decrease in water content in honey used whiting as the adsorbent. This study aims to determine the ability of whiting as an adsorbent in reducing the water content of honey bee silang and determine the q…
ABSTRACT Eucalyptus leaf is one of the essential oil-producing ingredients. The purpose of this study was to study the effect of sample conditions (fresh leaves and dried leaves), whole leaves and chopped leaves, as well as the extraction time on the yield of essential oils extracted from hybrid eucalyptus leaves using the microwave hydrodistillation and gravity (MHG) method. The essential oil…
ABSTRACT Honey not only contains sweeteners or food flavorings, but honey also contains very essential nutrients. Honey is produced by honey bees by utilizing plant flowers. In this study, the decrease in water content in honey used whiting as the adsorbent. This study aims to determine the ability of whiting as an adsorbent in reducing the water content of honey bee silang and determine the q…
ABSTRACT Bengkalis Island has a very large area of peat, 66,429.92 hectares of peatland that has been damaged. With the large area of peatland that has been disturbed and the massive construction of drainage canals in the peat ecosystem, it has an impact on the drainage of peatlands, decreasing water storage capacity. Research at the Peat Hydrological Unit (KHG) of Bengkalis Island needs to be…
ABSTRACT Petroleum is the main source of energy and a source of foreign exchange for the country. However, Indonesia's oil reserves are limited, so alternative fuels are needed. Biodiesel is an alternative fuel to replace diesel which is produced from vegetable oil through a transesterification reaction process between vegetable oil, methanol and a catalyst. However, in its use in diesel engin…
ABSTRACT Along with the development of the times, the need for fuel oil is increasing. The development of research and use of diesel engines in industry will not stop just because of the depletion of fossil fuels. The search for alternative fuels as a substitute for diesel fuel continues to be carried out in addition to overcoming the problems of the global energy and environmental crisis …
Abstract Oil palm fronds are lignocellulosic biomass that has not been utilized optimally. Juice-free palm frond fractionation can convert the main components of biomass into valuable products, such as pulp. The purpose of this study was to study the effect of process conditions on the yield of pulp, cellulose and lignin contained in the pulp. The effect of process conditions was studied by Re…
ABSTRACT Isobutyl palmitate (C20H40O2) known as hexadecanoic acid 2-methyl propyl ester is an organic compound which at room temperature is a colorless liquid, soluble in alcohol and ether, but insoluble in water. Isobutyl Palmitate is used as plasticizers, namely materials that function to increase the workability and flexibility of plastics. Isobutyl palmitate is produced by reacting palmiti…
ABSTRACT Palm oil is Indonesia's mainstay commodity which plays an important role in the economic development of the Indonesian nation. One of the products produced from the oleochemical industry is fatty acid. Palmitic acid is one of the largest fatty acid fraction found in Crude Palm Oil (CPO). The process used is a hydrolysis process with raw materials of CPO (Crude Palm Oil) and water. The…
ABSTRAK In everyday life, many used aluminum cans that are found around us become waste that can interfere with environmental hygiene and it turns out that so far it has not been processed properly by recycling. This is because the largest canned beverage producer in Indonesia is currently lacking in canned waste treatment systems. This final project aims to press used beverage cans with a can…
ABSTRACT Many coal mining companies use motors equipped with Variable Speed Drive (VSD) in the mining process. Variable Speed Drive (VSD) is a power electronic equipment that functions to regulate motor speed, but the use of Variable Speed Drive (VSD) can cause new problems that can reduce power quality in the electrical system, the problem is harmonics. The current solution that is widely use…
ABSTRACT Screw conveyor is a type of conveyor often used to move semi-solid materials. This examination will analyze the stress on the screw conveyor type 12S624R by modifying the length of the shaft. According to the Screw Conveyor Catalog & Engineering Manual, the length of each screw shaft for a screw conveyor with a diameter of 0,3 meters is about 3,75 meters, if the screw conveyor need le…
ABSTRACT Leaf springs as a component of the suspension system function to absorb shocks from the road and wheel vibrations so that they are not transmitted to the vehicle body directly and increase the tire's grip on the road surface and support the overall weight of the vehicle, both the weight of the body, engine, passengers, frame and other loads supported on it. The old leaf spring used wi…
ABSTRACT Main object of this research is to perform experimental test on a clothes dryer using an air conditioning system. The air conditioning system varied into three type which is split type, windows type and portable type. This research has to be done using pre heat for 30 minutes before examination started. Examination was conducted to obtain the performance parameters of SMER, SEC and Dr…
ABSTRACT Dimethyl formamide ((CH3)2HCON) or abbreviated DMF is an organic compound in the form of a colorless liquid that can be mixed with water and most organic liquids. Dimethyl formamide can be used as a solvent in the peptide coupling process for pharmaceuticals, in the peptide production process, and in the production of adhesives, synthetic leather, film coatings, and others. The manufa…
ABSTRACT The development of industry has a positive effect in the form of increasing the national economy, but has a negative effect, namely heavy metal waste pollution. Copper ion (Cu2+) is one of the causes of polluted environment. The maximum limit of copper ions (Cu2+) allowed in environmental water according to the PERMENKES RI NO.492/MENKES/PER/IV/2010 is 1.0 mg/l. Pineapple leaf fiber h…