Development and performance of a parsimonious model to estimate temperature in sewer networks
J.A. Elias Maxil (TU Delft - Sanitary Engineering)
J.A.M.H. Hofman (KWR Water Research Institute, University of Bath)
B.A. Wols (KWR Water Research Institute)
Francois Clemens (TU Delft - Sanitary Engineering, Deltares)
Jan Peter van der Hoek (Waternet, TU Delft - Sanitary Engineering)
LC Rietveld (TU Delft - Sanitary Engineering)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
This paper presents a model (inspired by another model) to calculate water temperature in free-surface flow with two main innovations: the convective heat transfer occurs only at the wetted perimeter of pipes, and the model was integrated to commercial software used for hydraulic calculations in drainage systems. Given these innovations, we could reduce the number of modeling input data to calculate the temperature of water and soil in the radial and tangential directions along the pipes, with the advantages of using industry-standard software. To test the performance of the model, it was firstly calibrated in two sets of experiments (to calibrate the hydraulic and the thermal parameters separately), and benchmarked with a third controlled discharge against the case model. The results indicate that in unsteady-state situations the parsimonious model can be twice as accurate as the underlying model because the parsimonious model considers the hydraulic influence of sewer infrastructure.
help_outline