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Modelling temperature dynamics in sewer systems – Comparing mechanistic and conceptual modelling approaches
Lund University, Sweden.
RISE Research Institutes of Sweden, Built Environment, System Transition and Service Innovation. Lund University, Sweden.ORCID iD: 0000-0003-1547-8413
Lund University, Sweden.
Lund University, Sweden.ORCID iD: 0000-0003-4866-0262
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2021 (English)In: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 84, no 9, p. 2335-2352Article in journal (Refereed) Published
Abstract [en]

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. © 2021 The Authors.

Place, publisher, year, edition, pages
IWA Publishing , 2021. Vol. 84, no 9, p. 2335-2352
Keywords [en]
Heat recovery, Heat transfer, Modelling, Sewer system, Temperature dynamics, Dynamics, Sewers, Waste heat, Wastewater treatment, Conceptual model, Energy, Mechanistic models, Model temperatures, Modeling, Modeling approach, Urban water services, Wastewater temperature, Mean square error, calibration, data, model, temperature, wastewater, article, city, energy recovery, sewer
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:ri:diva-57338DOI: 10.2166/wst.2021.425Scopus ID: 2-s2.0-85120440444OAI: oai:DiVA.org:ri-57338DiVA, id: diva2:1622734
Note

Funding details: Svenska Forskningsrådet Formas, 942-2016-80; Funding details: Svenskt Vatten, SWWA, 16-106; Funding text 1: The authors acknowledge the financial support provided by Swedish research council Formas (942-2016-80), The Swedish Water and Wastewater Association (16-106) and Sweden Water Research for the project HÅVA (‘Sustainability analysis for heat recovery from wastewater’). VA Syd (Malmö) and Tekniska Verken (Linköping) are also gratefully acknowledged for their financial support, providing various details about the sewer network and supporting measurement campaigns.

Available from: 2021-12-23 Created: 2021-12-23 Last updated: 2024-05-17Bibliographically approved

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Arnell, MagnusWärff, ChristofferAhlström, Marcus

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