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      Understanding, controlling and optimising the cooling of waste thermal treatment beds including STARx Hottpads

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          Abstract

          STARx (Self-sustaining Treatment for Active Remediation ex situ) is a thermal treatment strategy for contaminated soils and organic wastes. Key to this technology is that organics are embedded in porous matrix beds (e.g. sand). STARx induces a self-sustaining smouldering combustion front that traverses the bed, burning away the embedded contaminants/wastes. The time and cost effectiveness of this technology is largely dictated by the time required for cooling of the hot, clean, porous matrix bed that remains after treatment. This study is the first to explore the cooling of these beds. A suite of novel simulations investigated the influence of key parameters on bed-cooling time. The results reveal that cooling time decreased nearly linearly with decreases of volume-averaged bed temperature and bed bulk density. Increased injection air fluxes led to the non-linear decrease of cooling time. Also, cooling time was negatively impacted by bed temperature inhomogeneity, which influenced preferential air flow through cooler regions of the bed, bypassing hotter regions. From these results, using lower bulk density bed materials, increased air fluxes and enhancing wall insulation to improve bed temperature homogeneity were identified as system optimisations to reduce cooling times. While the aim of this research is to improve the STARx cooling process, the results are also highly applicable to many similar engineering systems that involve hot porous bed cooling.

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          An overview of thermal energy storage systems

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            The severity of smouldering peat fires and damage to the forest soil

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              • Record: found
              • Abstract: not found
              • Article: not found

              Modeling of smoldering combustion propagation

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                Author and article information

                Journal
                Waste Manag Res
                Waste Manag Res
                WMR
                spwmr
                Waste Management & Research
                SAGE Publications (Sage UK: London, England )
                0734-242X
                1096-3669
                21 March 2022
                September 2022
                : 40
                : 9
                : 1390-1401
                Affiliations
                [1 ]Department of Civil and Environmental Engineering, The University of Western Ontario, London, ON, Canada
                [2 ]Department of Mechanical and Materials Engineering, The University of Western Ontario, London, ON, Canada
                [3 ]Savron, Guelph, ON, Canada
                Author notes
                [*]Jason I Gerhard, Department of Civil and Environmental Engineering, The University of Western Ontario, Spencer Engineering Building, London, ON N6A 5B9, Canada. Email: jgerhard@ 123456uwo.ca
                Author information
                https://orcid.org/0000-0002-0705-0583
                https://orcid.org/0000-0001-6885-3059
                Article
                10.1177_0734242X221076308
                10.1177/0734242X221076308
                9393652
                35311419
                51be21f0-b2f2-4def-bce3-fc4bffdcda2e
                © The Author(s) 2022

                This article is distributed under the terms of the Creative Commons Attribution 4.0 License ( https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages ( https://us.sagepub.com/en-us/nam/open-access-at-sage).

                History
                : 26 August 2021
                : 10 January 2022
                Categories
                Original Articles
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                ts1

                applied smouldering systems,cooling time reduction,forced convection,hot packed bed,process optimisation,starx,thermally induced air channelling,waste thermal treatment

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