Determining vol. flow or flow speed and/or temp. of flowing medium in pipe involves computing flow or flow rate from measured heat flow at pipe surface, medium and ambient temp.

摘要

The method involves measuring the flow of heat from the outer pipe surface to the surroundings (3) using at least one heat flow sensor (2) mounted on the outer pipe surface and measuring the temp. of the medium and the ambient temp. with suitably mounted temp. sensors. The vol. flow or flow speed is derived from the measured heat flow and temp. values. An Independent claim is also included for an arrangement for determining the vol. flow or flow speed and/or temp. of a flowing medium in a pipe.