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Modelling temperature dynamics in sewer systems – Comparing mechanistic and conceptual modelling approaches

Saagi, R. LU orcid ; Arnell, M. LU ; Reyes, D. ; Wärff, C. LU ; Ahlström, M. and Jeppsson, U. LU orcid (2021) In Water Science and Technology 84(9). p.2335-2352
Abstract

The vast majority of the energy consumed for urban water services is used to heat tap water. Heat recovery from wastewater is consequently an area of rapidly growing concern, both in research and by commercial interest, promoting the path towards a circular economy. To facilitate a system-wide evaluation of heat recovery from wastewater, this paper compares two one-dimensional models (mechanistic and conceptual) that can describe wastewater temperature dynamics in sewer pipe systems. The models are applied to successfully predict downstream wastewater temperature for sewer stretches in two Swedish cities (Linköping and Malmö). The root mean squared errors for the mechanistic model (Linköping Dataset1 – 0.33 °C; Linköping Dataset2 – 0.28... (More)

The vast majority of the energy consumed for urban water services is used to heat tap water. Heat recovery from wastewater is consequently an area of rapidly growing concern, both in research and by commercial interest, promoting the path towards a circular economy. To facilitate a system-wide evaluation of heat recovery from wastewater, this paper compares two one-dimensional models (mechanistic and conceptual) that can describe wastewater temperature dynamics in sewer pipe systems. The models are applied to successfully predict downstream wastewater temperature for sewer stretches in two Swedish cities (Linköping and Malmö). The root mean squared errors for the mechanistic model (Linköping Dataset1 – 0.33 °C; Linköping Dataset2 – 0.28 °C; Malmö – 0.40 °C) and the conceptual model (Linköping Dataset1 – 0.32 °C; Linköping Dataset2 – 0.20 °C; Malmö – 0.44 °C) indicate that both models have similar predictive capabilities, encouraging the use of conceptual models to reduce data requirements and model calibration efforts. Both models are freely distributed and can be easily integrated with wastewater generation and treatment models to facilitate system-wide wastewater temperature dynamics analysis.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Heat recovery, Heat transfer, Modelling, Sewer system, Temperature dynamics
in
Water Science and Technology
volume
84
issue
9
pages
18 pages
publisher
IWA Publishing
external identifiers
  • pmid:34810315
  • scopus:85120440444
ISSN
0273-1223
DOI
10.2166/wst.2021.425
language
English
LU publication?
yes
id
16072c34-4b8c-4908-826f-9a9b15e550c9
date added to LUP
2022-01-18 17:12:08
date last changed
2025-02-13 03:03:44
@article{16072c34-4b8c-4908-826f-9a9b15e550c9,
  abstract     = {{<p>The vast majority of the energy consumed for urban water services is used to heat tap water. Heat recovery from wastewater is consequently an area of rapidly growing concern, both in research and by commercial interest, promoting the path towards a circular economy. To facilitate a system-wide evaluation of heat recovery from wastewater, this paper compares two one-dimensional models (mechanistic and conceptual) that can describe wastewater temperature dynamics in sewer pipe systems. The models are applied to successfully predict downstream wastewater temperature for sewer stretches in two Swedish cities (Linköping and Malmö). The root mean squared errors for the mechanistic model (Linköping Dataset1 – 0.33 °C; Linköping Dataset2 – 0.28 °C; Malmö – 0.40 °C) and the conceptual model (Linköping Dataset1 – 0.32 °C; Linköping Dataset2 – 0.20 °C; Malmö – 0.44 °C) indicate that both models have similar predictive capabilities, encouraging the use of conceptual models to reduce data requirements and model calibration efforts. Both models are freely distributed and can be easily integrated with wastewater generation and treatment models to facilitate system-wide wastewater temperature dynamics analysis.</p>}},
  author       = {{Saagi, R. and Arnell, M. and Reyes, D. and Wärff, C. and Ahlström, M. and Jeppsson, U.}},
  issn         = {{0273-1223}},
  keywords     = {{Heat recovery; Heat transfer; Modelling; Sewer system; Temperature dynamics}},
  language     = {{eng}},
  number       = {{9}},
  pages        = {{2335--2352}},
  publisher    = {{IWA Publishing}},
  series       = {{Water Science and Technology}},
  title        = {{Modelling temperature dynamics in sewer systems – Comparing mechanistic and conceptual modelling approaches}},
  url          = {{http://dx.doi.org/10.2166/wst.2021.425}},
  doi          = {{10.2166/wst.2021.425}},
  volume       = {{84}},
  year         = {{2021}},
}