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A method and apparatus for measuring the thickness of film fouling in a hydraulic system. While the system is clean and unfouled, it is subjected to a brief test run during which the water velocity is swept over a wide range and the corresponding pressure drops are measured and recorded to provide a

A method and apparatus for measuring the thickness of film fouling in a hydraulic system. While the system is clean and unfouled, it is subjected to a brief test run during which the water velocity is swept over a wide range and the corresponding pressure drops are measured and recorded to provide a reference curve for the velocity-pressure drop characteristic. Later, when the system is fouled, the brief test run is repeated to arrive at a new reference curve, part of which substantially coincides with the said reference curve and part of which departs monotonically. The point of departure, by calculation, yields the thickness of the film fouling.

대표청구항 ▼

The method of determining the thickness of a fouling deposit in a hydraulic conduit of uniform cross section which comprises the steps of: determining, for a test section of said conduit, while in a clean and polished condition, the relationship between fluid flow velocity and fluid pressure drop ov

The method of determining the thickness of a fouling deposit in a hydraulic conduit of uniform cross section which comprises the steps of: determining, for a test section of said conduit, while in a clean and polished condition, the relationship between fluid flow velocity and fluid pressure drop over a wide range of fluid flow velocities; recording said relationship to establish, for later use, a reference characteristic; using said conduit for a period of time during which the conduit becomes coated with a fouling deposit; at the end of said period of time determining, for said test section, while in its then fouled condition, the relationship between fluid flow velocity and fluid pressure drop over a wide range of fluid flow velocities; recording said relationship to establish, for the time of the test, a transitory test characteristic; comparing said reference characteristic with said transitory test characteristic to determine the critical fluid velocity below which the two characteristics are substantially identical and above which they diverge; and utilizing said critical fluid velocity as a measurement to determine the thickness of the fouling deposit in said conduit at said time of the test.