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INDONESIA
YOUNGSTER PHYSICS JOURNAL
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Physics
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Articles 12 Documents
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Search results for , issue "Vol 6, No 3 (2017): Youngster Physics Journal Juli 2017" : 12 Documents clear
Rancang bangun furnace temperatur tinggi dengan pengendali mikrokontrol ATMEGA 8535 menggunakan sumber pemanas Silicon Carbide (SiC) Sulistyawan A; Anas M Najih; Priyono Priyono
Youngster Physics Journal Vol 6, No 3 (2017): Youngster Physics Journal Juli 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

It has been successfully designed high temperatur furnace using Silicon Carbide (SiC) as an electric furnace source which can be controlled by ATMEGA 8535. The result of thermocouple test with standard measuring device as calibrator in temperatur range 50 ° C - 500 ° C can work well, that have been indicated by the characteristics The temperatur in the thermocouple to the ADC (Analog to Digital Converter) value in the microcontroller is Y (ADC) = 2.0062 T + 4.6. In testing of the entire furnace system for various input voltages it can be shown that the higher operating voltage will increase the heating rate in the combustion chamber. In the design using 4 sources of heating SiC with the volume of combustion chamber 1.2 liters indicates the spread of heat is quite evenly and effectively.Keywords: Furnace, AVR ATMEGA 8535 Microcontroller, Silicon Carbide 
Pemodelan 2 dimensi data magnetotellurik berdasarkan analisis phase tensor dalam penentuan geoelectrical strike dan dimensionalitas data di Lapangan Panas Bumi “X” Fitra Ramdhani; Agus Setyawan; Imam B. Raharjo; Lendriadi A.
Youngster Physics Journal Vol 6, No 3 (2017): Youngster Physics Journal Juli 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1183.353 KB)

Abstract

Magnetotelluric research has been done on the geothermal field "X" aims to indentify dimensionality of data, direction of geoelectrical strike and map resistivity distribution of subsurface structure. Before modelling 2 dimensional subsurface structure, MT data must go through stage quality control data, analysis of dimensionalitas data and analysis direction of geoelectrical strike to get 2 dimensional structure model of the subsurface are accurate. The stages of quality control data was done by eliminate the points in the curve of resistivity and phase which out of the trend that is considered as noise. Dimensionality data analysis use curve of three parameters invariant phase tensor i.e phi maximum, phi minimum and beta. Analysis of  the geolectrical strike direction was done by showing a reduction of angle  and  in rose diagram. Overall the analysis phase tensor was performed on 60 tensor magnetotelluric data in the geothermal field "X". Modeling subsurface resistivity structure use the scheme forward modelling and inverse modelling. The results of selection cross power showed that magnetotelluric data are dominated by good quality data. The results of dimensionality data analysis indicates that the dimensionality data of MT data in the geothermal field "X" consists of structure with dimensionality 1D, 2D and 3D structure. Structure with dimensionality 1D is in  frequency range 320 – 44 Hz, Structure with dimensionality 2D is in frequency range 44 – 0,3 Hz and structure with dimensionality 3D is in  frequency range 0.3 – 0.004 Hz in the geothermal field "X". Rose diagram in frequency range 320 – 0.3 Hz was combined with direction of regional structure in geothermal field "X" indicates that the direction of geoelectrical strike is N330oE. 2 dimensional modeling has been done in the frequency range 320 – 0,3 Hz. Data is rotated in the direction of geoelectrical strike before the modeling stage. 2 dimensional model consisting of five line perpendicular to the direction of the structure in the field. 2 dimensional model  show caprock layer has s resistivity range 5-20 Ohm-m that thicken to the Northwest while the reservoir layer has a resistivity range 80-120 Ohm-m are thinned to the Northwest. The heat source has a resistivity range 400-500 Ohm-m and located at depth  3.5 km below the surface.Keywords: Dimensionality, geoelectrical strike, distortion, model 2 dimensi

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