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A novel electrical charging condensing heat exchanger for efficient particle emission reduction in small wood boilers

Author

Listed:
  • Grigonytė-Lopez Rodriguez, Julija
  • Suhonen, Heikki
  • Laitinen, Ari
  • Tissari, Jarkko
  • Kortelainen, Miika
  • Tiitta, Petri
  • Lähde, Anna
  • Keskinen, Jorma
  • Jokiniemi, Jorma
  • Sippula, Olli

Abstract

Small-scale biomass combustion is an important source of fine particles in ambient air, causing adverse health and environmental effects. Thus, there is a clear need to develop efficient and feasible flue gas cleaning technologies for small-scale combustion appliances. In this study a novel electrical charging condensing heat exchanger (eCHX) for combined fine particle removal and efficient heat recovery from flue gases was demonstrated in a small biomass-fired boiler. The method is based on the combination of a shielded corona charger and a condensing heat exchanger, where fine particles are removed by the electrophoretic, thermophoretic and diffusiophoretic forces. The eCHX was found to decrease >80% of fine particle mass (PM1) emissions and >40% of particle number emissions with simultaneous high thermal efficiency in the heat exchanger. The usage of the condensing heat exchanger without electrical charging resulted in 40% decrease in PM1 emissions when compared to the usage of a traditional tube heat exchanger. The advantage of the eCHX system is that it replaces the conventional heat exchanger in boilers, making it a compact and inexpensive solution, when compared to additional flue gas cleaning devices installed after the boiler.

Suggested Citation

  • Grigonytė-Lopez Rodriguez, Julija & Suhonen, Heikki & Laitinen, Ari & Tissari, Jarkko & Kortelainen, Miika & Tiitta, Petri & Lähde, Anna & Keskinen, Jorma & Jokiniemi, Jorma & Sippula, Olli, 2020. "A novel electrical charging condensing heat exchanger for efficient particle emission reduction in small wood boilers," Renewable Energy, Elsevier, vol. 145(C), pages 521-529.
    • Handle: RePEc:eee:renene:v:145:y:2020:i:c:p:521-529
    DOI: 10.1016/j.renene.2019.06.052
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    Cited by:

    1. König, Mario & Hartmann, Ingo & Varas-Concha, Felipe & Torres-Fuchslocher, Carlos & Hoferecht, Frank, 2021. "Effects of single and combined retrofit devices on the performance of wood stoves," Renewable Energy, Elsevier, vol. 171(C), pages 75-84.
    2. Wang, Dongji & Liu, Liansheng & Yuan, Ye & Yang, Hua & Zhou, Yixing & Duan, Ruanze, 2020. "Design and key heating power parameters of a newly-developed household biomass briquette heating boiler," Renewable Energy, Elsevier, vol. 147(P1), pages 1371-1379.
    3. Heikki Suhonen & Ari Laitinen & Miika Kortelainen & Pasi Yli-Pirilä & Hanna Koponen & Petri Tiitta & Mika Ihalainen & Jorma Jokiniemi & Mika Suvanto & Jarkko Tissari & Niko Kinnunen & Olli Sippula, 2020. "High Temperature Electrical Charger to Reduce Particulate Emissions from Small Biomass-Fired Boilers," Energies, MDPI, vol. 14(1), pages 1-20, December.

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