IDEAS home Printed from https://ideas.repec.org/a/eee/rensus/v50y2015icp1320-1337.html
   My bibliography  Save this article

Enhanced waste to energy operability under feedstock uncertainty by synergistic flue gas recirculation and heat recuperation

Author

Listed:
  • Tsiliyannis, Christos Aristeides

Abstract

Variations in quantities and composition of received wastes in waste to enegy (WTE) plants lead to throughput and power losses (lower profits). By disturbing the mean residence time of flue gases in the air-pollution-control-system they result in temperature and offgas flow variations affecting combustion efficiency and actual pollutant emissions. Besides energy savings, integration by flue gas heat recovery (FHR) in a heat exchanger (recuperator) enables maintaing high throughput under feedstock uncertainty (e.g. poor wastes). An effective method for reducing WTE atmospheric pollution, mainly NOx emissions, flue-gas-recirculation (FGR) – mass recirculation of a fraction of flue gases to the combustor – may be used for the same purpose. Both FHR and FGR are related to robustness issues, limiting the actual range and effect of manipulation. Recent results indicate that FHR and FGR have opposite effects on WTE performance – increasing FGR cools down the combustor, while FHR boosts up combustion. The present work demonstrates the possibility of improving operability of WTE facilities by combined use of FHR and FGR, utilizing multiple waste mixtures with uncertain feedrates, heating value, or composition. It brings forth a key dimensionless parameter, determining the direction and magnitude of the manipulation and leads to explicit expressions for the sensitivities of power production, throughput and capacity constraints with respect to FGR and FHR ratios. Synergistic use of FHR and FGR enables maximization of throughput and power production within the process capacity constraints, without detrimental effects on destruction efficiency or final emissions. A Case Study is analyzed for a facility under a public–private-partnership contract, with received waste ranging from a guaranteed minimum 150.000–200.000TPY and composition range: biodegradables 52–70% ww, recyclables (paper, plastics, metals, glass) 25–45% ww.

Suggested Citation

  • Tsiliyannis, Christos Aristeides, 2015. "Enhanced waste to energy operability under feedstock uncertainty by synergistic flue gas recirculation and heat recuperation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 1320-1337.
    • Handle: RePEc:eee:rensus:v:50:y:2015:i:c:p:1320-1337
    DOI: 10.1016/j.rser.2015.04.159
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S1364032115004293
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.rser.2015.04.159?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Tsiligiannis, Aristeides & Tsiliyannis, Christos, 2020. "Oil refinery sludge and renewable fuel blends as energy sources for the cement industry," Renewable Energy, Elsevier, vol. 157(C), pages 55-70.
    2. Tsiliyannis, Christos A., 2019. "Energy from waste: Plant design and control options for high efficiency and emissions’ compliance under waste variability," Energy, Elsevier, vol. 176(C), pages 34-57.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:rensus:v:50:y:2015:i:c:p:1320-1337. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.elsevier.com/wps/find/journaldescription.cws_home/600126/description#description .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.