Abstract:
An oil leakage monitoring system (OLMS), which is used for
monitoring oil leakage in a conduit, is tested in this study. The
OLMS consists of a pair of ultrasonic flow sensors and a test conduit
which is vertically branched from the main conduit located
underground. The OLMS can detect fault signals from the ultrasonic
sensors to decide if the signals come from oil leakage in the
conduit. Leakage detection is enabled by detecting signal quality
of transmitted and received ultrasonic signals between the two
ultrasonic sensors. The ultrasonic signals can be influenced by
working fluid such as air and oil. The OLMS with various conduit
diameters (40 mm, 50 mm, 80 mm and 100 mm), materials
(SUS 304 and carbon steel) and working fluids (oil and water)
was evaluated systematically. 100 random tests were performed
to see whether the ultrasonic signals can indicate the instance of
air bubble entrainment. The performance evaluation showed that
all the OLMS showed the accuracy less than 5 mm with confidence
level of 95 %.
Description:
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
