In this paper, it is shown that the time-invariant nonlinear model normally used to design algorithms to isolate leaks in pipes can introduce errors when the pipe in question is a plastic one exposed to temperature changes. Thus, this model must have a mechanism to compensate temperature variations, if it is desired that such model follows in a more accurate way the dynamics of a liquid. A comparison of the behavior of the model with and without temperature compensation is made using real data coming from a plastic pipeline prototype transporting water.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.