Browsing by Author "Ginting, M."

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    PEMBUATAN KOLEKTOR PELAT DATAR SEBAGAI PEMANAS AIR ENERGI SURYA DENGAN JUMLAH PENUTUP SATU LAPIS DAN DUA LAPIS
    (2014-03-26) Hayati, D.; Ginting, M.; Tambunan, W.
    A research has conducted on "Fabrication of Flat Plate Collector as a Solar Energy Water Heater with One and Two Covers”, using the experimental methods. The experiments were done by putting two types of solar collector on the area that the solar beam can falls freely that perpendicularly to the surface of the collectors. The measurement were carried out on the intensity of solar radiation coming, hot water temperature and the lost heat by using equipment of a simple pylheliometer and a mercury thermometer. This measurements were done in 60 minutes interval every day for 14 days of observation. The results obtained for both types of flat plate collectors produced 66 liters of water every day. The two tier covered flat plate collector reached the highest temperature of 95o C, which was higher than its of the single-tier covered flat plate collector of 84o C. This result was due to the more layers cover the less heat that lost through the top surface of the flat plate collector. The highest temperature of the hot water that accommodated in the tank was 51o C for the double layer collector lid and 47° C for the one layer of collector lid
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    PENGUJIAN DAN PEMANFAATAN PANAS BATU KAPUR SEBAGAI SUMBER ENERGI LISTRIK
    (2014-03-26) Febrizal; Ginting, M.; Sugianto
    The investigation of limestone heat characterization and utilization as a source of electrical energy has been conducted using an experimental method. The experiment was conducted using series of a voltage cell where the measurement of voltage, current, power, electrical energy, thermal energy, and temperature can be done. In the experiment solution of CaCO3 (limestone) mixed with H2O were used as samples. The first sample was a mixture of CaCO3 with the mass 200 g, 300 g, 400 g, 500 g, and 600 g with H2O whose volume 800 ml. The second sample was the mixture of CaCO3 with H2O whose mass of 400 g with volume of 300 ml, 400 ml, 500 ml, 600 ml, and 700 ml. The results of mixture reaction of CaCO3 with H2O indicated that the maximum temperature of 100 0C need two minutes reachit and decline back to the temperature 30 C with needed time about 145 minutes. The maximum temperature resulted voltage 39,78 mV for limestone mass 400 g at water volume 300 ml. The highest peak current was 20,26 mA, related to the electrical power 625,63 mW, and thermal energy 0,09 Joules using limestone mass with 400 g and 300 ml water that occurred in 2 minutes. The maximum values showed that amount of limestone mass and water volume should be balanced in order to produce maximum power and electrical energy
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    TINGKAT PENYERAPAN INDUKSI MAGNETIK BAHAN PENYERAP YANG DITIMBULKAN OLEH TELEPON SELULER
    (2014-03-26) Sarlismi; Erwin; Ginting, M.
    Users of cellular telephone (HP) today claim that weak static magnetic fields (B) is induced around the HP and this may affect the users. In this research, measurement of a static magnetic induction and a magnetic moment induced by HP was carried out. The measurement of the static magnetic induction was done for two directions which were horizontal and vertical direction. The static magnetic induction induced by that HP was measured using a magnetic sensor Pasco PS 2112. The effect of the thickness of material such as copper (Cu) inserting between a magnetic probe and the HP was studied. For the horizontal direction (x direction), the magnetic induction was measured with the distance of 0,7 cm from the HP with and without Cu. The static magnetic induction was also measured in vertical direction (z-direction) using 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, and 5 mm of absorption materials. The results showed that the static magnetic induction was induced by those HP has normal distribution with the position of the peak near thetop of the HP. The value of magnetic induction was found to be 10-3 T and 9 10 T without and with Cu, respectively. For vertical measurement, it was found that the static magnetic induction reduced its values with increasing distance from the HP. By plotting B versus distance, it was found that the magnetic moment of the HP was 1,5 Am2. Based on these plots, then it was also found that the level of absorption of was about 0,02 mm-1