Accession Number : AD0655819

Title :   MICROWAVE MONITORING OF SEA WATER CONTAMINATION OF NAVY FUEL OILS,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Howard,Dean D. ; Thomas,Nathaniel A. ; Licitra,Michael C. ; Roe,Robert M.

Report Date : 21 JUN 1967

Pagination or Media Count : 22

Abstract : Studies of microwave monitoring techniques have resulted in a potential method of monitoring of the percentage of sea water contamination to an accuracy of 0.25%. Investigation was made of both the dielectric constant and the dissipation (microwave energy loss) characteristics of contaminated fuel. The dissipation measurement gave the greater accuracy which improved with increasing microwave frequency. The dissipation measured for all samples of uncontaminated fuels was very small compared to the sensitivity to water, so that the effects of the differences in the different sources of fuel were minimized. Testing of samples from all parts of the world with accurately mixed percentages of sea water showed that this microwave technique can be used to monitor the percentage of sea water to within 0.25% of the actual value regardless of the source of the oil. The ability to measure to this order of accuracy was limited, in part, by the difficulty of preparing sufficiently precise sample mixtures for testing the technique. The microwave technique also lends itself readily to convenient practical implementation of continuous monitoring of fuel flowing to the furnaces. (Author)

Descriptors :   (*FUEL OIL, MONITORS), (*MONITORS, CONTAMINATION), SEA WATER, MICROWAVE EQUIPMENT, NAVAL EQUIPMENT, DIELECTRIC PROPERTIES, MEASUREMENT, MICROWAVE FREQUENCY

Subject Categories : Fuels

Distribution Statement : APPROVED FOR PUBLIC RELEASE