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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-11-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/84/9/2335 |
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| 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 |
| collection | DOAJ |
| 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.; |
| first_indexed | 2024-12-14T07:39:52Z |
| format | Article |
| id | doaj.art-c94fafdf878148979c5e3c701f1a025d |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-14T07:39:52Z |
| publishDate | 2021-11-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-c94fafdf878148979c5e3c701f1a025d2022-12-21T23:11:05ZengIWA PublishingWater Science and Technology0273-12231996-97322021-11-018492335235210.2166/wst.2021.425425Modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approachesR. Saagi0M. Arnell1D. Reyes2C. Wärff3M. Ahlström4U. Jeppsson5 Division of Industrial Electrical Engineering and Automation (IEA), Department of Biomedical Engineering, Lund University, P.O. Box 118, SE-22100 Lund, Sweden Division of Industrial Electrical Engineering and Automation (IEA), Department of Biomedical Engineering, Lund University, P.O. Box 118, SE-22100 Lund, Sweden Division of Industrial Electrical Engineering and Automation (IEA), Department of Biomedical Engineering, Lund University, P.O. Box 118, SE-22100 Lund, Sweden Division of Industrial Electrical Engineering and Automation (IEA), Department of Biomedical Engineering, Lund University, P.O. Box 118, SE-22100 Lund, Sweden RISE Research Institutes of Sweden, Gjuterigatan 1D, SE-58273 Linköping, Sweden Division of Industrial Electrical Engineering and Automation (IEA), Department of Biomedical Engineering, Lund University, P.O. Box 118, SE-22100 Lund, Sweden 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.;http://wst.iwaponline.com/content/84/9/2335heat recoveryheat transfermodellingsewer systemtemperature dynamics |
| spellingShingle | R. Saagi M. Arnell D. Reyes C. Wärff M. Ahlström U. Jeppsson Modelling temperature dynamics in sewer systems – comparing mechanistic and conceptual modelling approaches Water Science and Technology heat recovery heat transfer modelling sewer system temperature dynamics |
| title | 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_short | 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 |
| topic | heat recovery heat transfer modelling sewer system temperature dynamics |
| url | http://wst.iwaponline.com/content/84/9/2335 |
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