METHOD AND APPARATUS FOR TESTING PRACTICAL LOW-TEMPERATURE FLUIDITY OF A FUEL OIL

摘要

PROBLEM TO BE SOLVED: To enhance correlation performance of an actual machine simulation method. SOLUTION: A 100-500 ml fuel oil containing a fluidity improvement agent is cooled from a higher temperature at least by 5 deg.C than its cloud point at a cooling speed of 0.6-1.8 deg.C/Hr. At the same time, every time the oil reaches a lower temperature sequentially via a required temperature interval in the vicinity of a permeation limit temperature during the cooling process, the A fuel oil is passed through a mesh body of a 15-320 mm filtration area and a 75-135μm aperture for a predetermined time with an initial suction pressure of -66-94 kPa and a suction pressure is measured. This is repeated. A practical low-temperature fluidity of the A fuel oil is evaluated from a change of the suction pressure in the predetermined time.