HAMAYESHE KEYFIAT & BAHREVARI DAR SANATE BARGH | Year:2003 | دوره:4 |Papers Count:2

THIS PAPER PRESENTS EXPERIMENTAL EVIDENCE THAT FOUR TYPES OF MAGNETIC LAMINATED CORE MATERIALS OF GRAIN ORIENTED 3% SILICON-IRON CUT AND MAGNETIZED AT 0O TO THEIR ROLLING DIRECTION AND ONE TYPE OF AMORPHOUS MATERIAL (POWERCORE) FFECTS THE MAGNITUDE OF THE NORMAL FLUX DENSITY DISTRIBUTION TRANSFER BETWEEN THEM. STACKS OF LAMINATIONS WERE AGNETIZED AT 50HZ BETWEEN 1.0 AND 1.8 T AND THE NORMAL FLUX WAS FOUND TO VARY FROM ABOUT 0.5 TO 1.2 MT. THE FLUX TRANSFER IN ANY GROUP OF SAMPLES COULD VARY BY AS MUCH AS 100% ACCORDING TO THE DIFFERENT TYPES OF MATERIALS USED WITH POSSIBLE CONSEQUENTIAL DIFFERENCES IN THE POWER LOSS DUE TO ASSOCIATED INPLANE EDDY CURRENTS.

THE PRESENCE OF ORGANIC HYDROCARBON CONTAMINANTS IN SOIL CONTINUES TO BE A CAUSE OF CONCERN. THE CONTAMINATION IS USUALLY DUE TO OIL SPILLAGE OR LEAKAGE FROM TRANSFORMERS. ALTHOUGH EVERY EFFORT IS MADE TO MINIMISE SPILLAGE, DURING HANDLING OF INSULATING OIL, BUT ACCIDENTS CAN HAPPEN RESULTING IN LAND AND WATER CONTAMINATION. THE CLEAN UP OF INSULATING OIL SPILL OR OIL CONTAMINATED WITH PCBS IS COSTLY TO ELECTRICITY INDUSTRY AND LABOUR INTENSIVE. IN THE OTHER HAND, THERE IS REQUIREMENT AND LEGISLATION TO CLEAN CONTAMINATED SITES FROM SPILLED HYDROCARBONS SPECIALLY THOSE WITH HIGH WATER TABLE. SEVERAL DECONTAMINATION TECHNIQUES AVAILABLE FULFIL THIS COMMITMENT. CHEMICAL TREATMENT OFFERS SOME ADVANTAGES OVER THE EXISTING METHODS. THIS PAPER REVIEWS DIFFERENT AVAILABLE TECHNIQUES FOR SOIL CLEAN UP. IT IS ALSO REPORTING A NEWLY DEVELOPED CHEMICAL TECHNIQUE FOR DECONTAMINATION OF SOIL FROM HYDROCARBON AND PCBS. IT IS FAST, ENVIRONMENTAL FRIENDLY, ECONOMY AND CAN BE USED ON SITE.