Development and performance of a parsimonious model to estimate temperature in sewer networks

Jorge A. Elías-Maxil, Jan Hofman, Bas Wols, Francois Clemens, Jan Peter van der Hoek, Luuk Rietveld

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This paper presents a model (inspired in 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 a commercial software used for hydraulic calculations in drainage systems. Given these innovations, we could reduce the number of modelling 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.
Original languageEnglish
Article numberNURW 1276811
Pages (from-to)829-838
JournalUrban Water Journal
Issue number8
Early online date31 Jan 2017
Publication statusPublished - 2017


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