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Pengaruh Variasi Bentuk Plat Terhadap Performansi Solar Water Heater
Get PDFThermal energy is one form of energy that is very crucial for human being. It can be obtained through the sun, i.e, that is solar energy. Solar energy is used widely both in industry and houshold. One of the most important component of solar water heater is thermal energy collector or known as absorber. Solar collector is a device utilized to convert sun radiation to thermal energy. This research wanted to examine the effect of different shapes of collector. The methodolody used is by varying the shapes of plat plate, where plate A has a square shape and plate B has has isosceles shape. Collector dimension is 1.5x0.8 m with these two shapes constructed from stainless steel. Pipe used for fluid is made from copper with 1 in diameter and 1.4 m length. Thermal insolation is used from rubber to decrease heat loss from pipe. Plate B collector with isosceles shape showed the highest efficiency compared to plate A collector with square shape. The highest outlet fluid temperature from plate B is 670C with sun radiation 1198 W/m2. The highest useful energy is 209.91 Watt from plate B at 13.30 and efficiency is 16.23% at 13.00WIB
Peningkatan Kadar Dissolved Oxygen pada Area Tambak Mengggunakan Windmill Aerator Tipe Savonius 4 Blade
Get PDFThe aeration process is a method to increase the dissolved oxygen levels in the water environment. In the pond area has a minimum requirement of dissolved oxygen content in the water so that fish can live and develop. The minimum value of dissolved oxygen in the pond area is 4 mg / l, but the higher the level of dissolved oxygen in the pond area, the better the results of the pond. Previous research conducted by Rizki was Analysis of the Potential of Wind Energy for Windmill Aerator Performance of ponds in Alue Kumba in East Aceh Regency, and the results of these studies showed that the wind energy in the Alue Kumba Village had the potential to operate windmill aerators. However, this study has not shown the results of the dissolved oxygen value of the windmill aerator system, therefore this study aims to obtain results and the area that can be reached by a diffuser. The method used is data collection of dissolved oxygen from the diffusser installation with a distance of 1.5 meters and data collection at 3 times, morning, afternoon and evening. Installation of windmill aerator in the morning produces dissolved oxygen value of 7.42 mg / l with a maximum distance of 18 meters, then in the afternoon the oxygen value of 6.23 mg / l with a maximum distance of 15 meters, and for the afternoon conditions the value of dissolved oxygen is 5.16 mg / l with a maximum distance of 16.5 meters. The dissolved oxygen value after the installation of the windmill aerator increased with an average increase of 1-2 mg / l at each measurement point with the highest dissolved oxygen highest value of 7.42 mg / l up from 5.52 mg / l with a maximum distance of 18 meters on the measurement morning. From the results of this study explain that this method can produce a good area of dispersed dissolved oxygen with an average distance of 16.5 meters with a minimum dissolved oxygen condition that is good for fish to develop in the area of the pon
Studi Eksperimental Pengaruh Variasi Jumlah Blade pada Turbin Angin Archimedes Spiral
Get PDFWind energy is one of the energy that is starting to be used to produce electricity or convert it to mechanical energy for other purposes. One of the tools used to harness wind energy is a wind turbine. Indonesia, especially Aceh, is one of the countries that has not used wind energy as a power plant because of the characteristics of wind in Indonesia which tends to be low-speed. Archimedes spiral wind turbine is a new type of wind turbine that can operate at low wind speeds, consisting of two to three Circular blades form an axis, then wrapped around each other and one side is extended, the design of this turbine essentially mimics the shell of the Nautilus snail (Biomimicry). The basic principle of this wind turbine is designed using the legal principle of Archimedes. This scientific work will analyze the effect of variations in the number of blades on rotation and the influence of blade rotation on wind speed using the experimental method, therefore turbines are made with variations of 2 blades and 3 blades, and the outer diameter is 80 cm and overall length is 90 cm. From the results of the study it was found that the 3 blade wind turbine has a better percentage of shaft rotation compared to the 2 blade wind turbine that is equal to 16.67%. Maximum wind power occurs on the 4th floor with a value of 164.3 watt
Kaji Pemanfaatan Atap Sebagai Pemanas Pada Sistem Pengering Bawang Merah (Allium Ascalonicum L.)
Get PDFAllium Ascalonicum L. are one of the agricultural commodities that grow in Aceh that can bear fruits throughout the year. In 2017, the total productive land area reached 725 hectares (HA) with a total production of around 5,739 tons per year. The average of the harvested Allium Ascalonicum L has high levels of water in range of 90 92 %, it is necessary to do a better process of drying / storing Allium Ascalonicum L according to SNI 01-3159-1992. This study aims to determine the effect of heating with four variations of flat plate type roofs (iron, aluminum, zinc, iron coated iron sand) so as to increase the rate of heat transfer in the drying chamber. Data is collected at the absorber, heater output, pipe exit, and onion drying / storage chamber. Heaters with an iron roof type are those that best distribute the pipe output temperature of 63 0C and room temperature of 42.6 oC. The type of iron roof has a material shrinkage of 10.8%, the type of iron roof coated with iron sand has a material shrinkage of 10.5%, the type of zinc roof has a material shrinkage of 10%, the type of aluminum roof has a material shrinkage of 7.8%. The highest room humidity was achieved in the aluminum roof type by 78% and the lowest in the iron roof type was 40%
Analisa Pengaruh Belokan Tajam pada Pipa Besi Terhadap Perpindahan Panas pada Solar Water Heater
Get PDFSolar energy is a renewable energy. In Indonesia the potential for renewable energy is very abundant but there is no optimal utilization. The use of solar energy, one of which is to use solar collectors to collect solar thermal energy. Solar water heater is a device that uses solar radiation and converts it into thermal energy. To get the most out of the collector, many ways can be done, one of which is the influence of the distance between the pipe passages, the length of the pipe passage and the diameter of the pipe bends. Then the closer the distance between the passage of the pipe will get the results of greater collector efficiency. In this research, the effect of sharp turns on the pipe with a total length of 4 meters is varied into 4 pipe length variations (70, 30, 20) cm and the shape of the Circle on the heat transfer of the solar water heater. From the research with the sun intensity of 691 W / m2 occurred in collector C (20 cm). The optimal results obtained are an outlet temperature of 64 OC with useful heat energy of 447.69 W / m2 and an efficiency of 89.98%, occurring at 14.00 WIB
Perancangan Sistem Kendali Prosthetic Arm Penggerak Motor Servo dan Sensor Flex Berbasis Mikrokontroler
Get PDFThis study examines about Prosthetic robotics technology which gradually continue to develop so that its use is wider. In this research author designed a control system on Microcontroller to move Prosthetic Arm. Prosthetic is an artificial device to replace the missing part of the body, this condition can occur through the condition at birth (abnormalities), illness and trauma. The purpose of this research is to create a Prosthetic Arm Prototype that can perform motion gripping, squeezing and removing. Prosthetic Arm was designed by using several control systems such as NANO Arduino, servo motor, flex sensor and Bluetooth as the main component. The Prosthetic Arm movement can only be operated based on the input of the control system that has been designed so that the movement operating on the Prosthetic Arm is desired. The result of this study shows that Prosthetic Arms can do gripping motion at 155 173 servo degree, squeezing motion at 180 servo degree and removing motion at 0 servo degree
Pengaruh Spindle Speed Dan Feed Rate Terhadap Pembentukan Burr Dan Keakurasian Dimensi Lubang Pada Material Kuningan Menggunakan Teknologi Micro-Drill Machining
Get PDFMachining technology, especially for micro hole cutting cases is a challenge in the industrial world to supply for components that have micro dimensions. The purpose of this study was to measure dimensional accuracy (roundness) and burr formation in the part of the entrance and exit holes. The object of the material used is brass plate. Brass plates with a thickness of 0.5 mm will be drilled using a twist drill chisel 0.2 mm diameter made from tungsten carbide material. Spindle rotation speed varied is 14,000 rpm, 17,000 rpm, and 20,000 rpm. The variation in feed rate for each spindle rotation is 5 mm / min, 8 mm / min, and 10 mm / min. The hole from the results will be observed and measured using a stereo microscope. From the measurement results show that the size of the largest hole dimensions with a value of 0.217 mm is formed at a rotation of 14,000 rpm and a feed rate of 5 mm / min, while the smallest hole diameter with a value of 0.202 mm is formed at a rotation of 20,000 rpm and a feed rate of 10 mm / min. The highest entrance burr value of 0.050 mm was formed at a rotation of 17,000 rpm and a feed rate of 10 mm / min, while the lowest height of 0.038 mm occurred at a rotation of 14,000 rpm and a feed rate of 5 mm / min. The highest exit burr value of 0.077 mm was formed at a rotation of 17,000 rpm and a feed rate of 10 mm / min, while the lowest height of 0.032 mm was formed at a rotation of 14,000 rpm and a feed rate of 5 mm / min. The results of this research data conclude that the accuracy of the hole dimensions and burr formation becomes better as the spindle rotation value and machining feed rate increase
Studi Kelayakan Energi Matahari Sebagai Pembangkit Listrik Tenaga Surya di Pulau Sabang
Get PDFSolar power generation is a power plant that utilizes solar energy as a source of electrical energy. Electrical energy in Sabang Weh Island is currently supplied by the power plant so it needs alternative energy to increase the electricity supply. The data taken in the form of sunlight intensity, voltage and current values generated from solar panels. Three points of data collection are: Banda Aceh, Kilometers zero Sabang and BMKG data Sabang Weh Island. The highest light intensity obtained on Sabang Weh Island for 853.20 watts / m2, the highest current of 4.32 Amper and a voltage value of 17, 20 Vol
Pengaruh Penerapan Metode Ripping pada Penambangan Batubara Terhadap Produktivitas Crushing Plant (Studi Kasus: PT Mifa Bersaudara, Aceh Barat)
Get PDFPT Mifa Bersaudara is a coal mining company that operates in Meulaboh, Aceh Barat. The main activities are extracting coal from the ground, loading, hauling, and crushing the coal to a specific size. There are two crushing plants that currently running at the site, Fix Crusher 01 (FC01) and Fix Crusher 02 (FC02). The production target for these crushers are 550 tons/hours and 450 tons/hours, respectively. However, the crushers could not meet the target. The main problem is the number of boulder materials from mining front almost 8.22 %, exceeding the optimum percentage of crushers input. In order to fix this matter, the application of ripping method in mining the coal is needed. This method utilizes Bulldozer CAT D8R, equipped with ripper, to break down the coal seam. Based on the calculation, this method could decrease the percentage of boulder materials from 8.22% to 3.04%. It enhances the productivity of excavator from 229.71 tons/hours to 284.05 tons/hours. Then, the productivity of the crushers also increase from 545 to 552 tons/hours for FC01 and from 347 to 452 tons/hours for FC02. Therefore, the application of ripping method in excavating the coal seam could increase the productivity of coal crushing plant
Pengaruh Diameter Hidrolik Terhadap Perpindahan Panas Kolektor Surya Belokan Tajam
Get PDFRectangular crossings with sharp turns have complex three-dimensional structures because the flow separation is caused by sudden changes in direction of flow in sharp turns. This study aims to determine the effect of variations in the width of the sharp channel solar collectors with hydraulic diameter factors to increase the heat transfer rate in solar collectors. The size of the collector examined was 2440mm x 1220mm in the form of a rectangular cross-section. Solar collectors use iron and iron gram absorber with a thickness of 30mm, the thermometer is placed on each track, channel, absorbent and output temperatur of each solar collector. The results of the study can be concluded that the solar collector with the largest hydraulic diameter value of 223 cm will produce the highest output temperatur and the temperatur distribution at the collector can reach 91 C at 13.30. This is because the greater the value of the hydraulic diameter or cross-sectional area will increase the heat transfer rate