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

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 evalu...

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Autores principales:	R. Saagi, M. Arnell, D. Reyes, C. Wärff, M. Ahlström, U. Jeppsson
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	heat recovery heat transfer modelling sewer system temperature dynamics Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/c94fafdf878148979c5e3c701f1a025d
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spelling	oai:doaj.org-article:c94fafdf878148979c5e3c701f1a025d2021-11-23T18:40:55ZModelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches0273-12231996-973210.2166/wst.2021.425https://doaj.org/article/c94fafdf878148979c5e3c701f1a025d2021-11-01T00:00:00Zhttp://wst.iwaponline.com/content/84/9/2335https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732The 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. HIGHLIGHTS Modelling tools to study energy recovery possibilities from wastewater are needed.; Mechanistic and conceptual models for temperature dynamics in sewer system are developed.; The models are applied for sewer pipes in two Swedish cities – Linköping and Malmö.; Both models offer similar prediction capabilities.; Further studies should include case studies outside Sweden and longer time periods.;R. SaagiM. ArnellD. ReyesC. WärffM. AhlströmU. JeppssonIWA Publishingarticleheat recoveryheat transfermodellingsewer systemtemperature dynamicsEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 9, Pp 2335-2352 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	heat recovery heat transfer modelling sewer system temperature dynamics Environmental technology. Sanitary engineering TD1-1066
spellingShingle	heat recovery heat transfer modelling sewer system temperature dynamics Environmental technology. Sanitary engineering TD1-1066 R. Saagi M. Arnell D. Reyes C. Wärff M. Ahlström U. Jeppsson Modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches
description	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. HIGHLIGHTS Modelling tools to study energy recovery possibilities from wastewater are needed.; Mechanistic and conceptual models for temperature dynamics in sewer system are developed.; The models are applied for sewer pipes in two Swedish cities – Linköping and Malmö.; Both models offer similar prediction capabilities.; Further studies should include case studies outside Sweden and longer time periods.;
format	article
author	R. Saagi M. Arnell D. Reyes C. Wärff M. Ahlström U. Jeppsson
author_facet	R. Saagi M. Arnell D. Reyes C. Wärff M. Ahlström U. Jeppsson
author_sort	R. Saagi
title	Modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches
title_short	Modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches
title_full	Modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches
title_fullStr	Modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches
title_full_unstemmed	Modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches
title_sort	modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/c94fafdf878148979c5e3c701f1a025d
work_keys_str_mv	AT rsaagi modellingtemperaturedynamicsinsewersystemscomparingmechanisticandconceptualmodellingapproaches AT marnell modellingtemperaturedynamicsinsewersystemscomparingmechanisticandconceptualmodellingapproaches AT dreyes modellingtemperaturedynamicsinsewersystemscomparingmechanisticandconceptualmodellingapproaches AT cwarff modellingtemperaturedynamicsinsewersystemscomparingmechanisticandconceptualmodellingapproaches AT mahlstrom modellingtemperaturedynamicsinsewersystemscomparingmechanisticandconceptualmodellingapproaches AT ujeppsson modellingtemperaturedynamicsinsewersystemscomparingmechanisticandconceptualmodellingapproaches
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Modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches

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