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    Modelling the potential for multi-location in-sewer heat recovery at a city scale under different seasonal scenarios

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    Publication date
    2018
    Author
    Mohamad, A-A.
    Schellart, A.
    Kroll, S.
    Mohamed, Mostafa H.A.
    Tait, S.
    Keyword
    Heat recovery
    Heat transfer modelling
    Wastewater temperature prediction
    Clean thermal energy
    Sewer network
    Sewers
    Rights
    © 2018 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    yes
    
    Metadata
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    Abstract
    A computational network heat transfer model was utilised to model the potential of heat energy recovery at multiple locations from a city scale combined sewer network. The uniqueness of this network model lies in its whole system validation and implementation for seasonal scenarios in a large sewer network. The network model was developed, on the basis of a previous single pipe heat transfer model, to make it suitable for application in large sewer networks and its performance was validated in this study by predicting the wastewater temperature variation in a sewer network. Since heat energy recovery in sewers may impact negatively on wastewater treatment processes, the viability of large scale heat recovery across a network was assessed by examining the distribution of the wastewater temperatures throughout the network and the wastewater temperature at the wastewater treatment plant inlet. The network heat transfer model was applied to a sewer network with around 3000 pipes and a population equivalent of 79500. Three scenarios; winter, spring and summer were modelled to reflect seasonal variations. The model was run on an hourly basis during dry weather. The modelling results indicated that potential heat energy recovery of around 116, 160 & 207 MWh/day may be obtained in January, March and May respectively, without causing wastewater temperature either in the network or at the inlet of the wastewater treatment plant to reach a level that was unacceptable to the water utility.
    URI
    http://hdl.handle.net/10454/16673
    Version
    Accepted Manuscript
    Citation
    Mohamad A-A, Schellart A, Kroll S, Mohamed M and Tait S (2018) Modelling the potential for multi-location in-sewer heat recovery at a city scale under different seasonal scenarios. Water Research. 145: 618-630.
    Link to publisher’s version
    https://doi.org/10.1016/j.watres.2018.08.073
    Type
    Article
    Collections
    Engineering and Informatics Publications

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