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The Direct Effect of Enriching the Gaseous Combustible with 23% Hydrogen in Condensing Boilers’ Operation

Author

Listed:
  • Răzvan Calotă

    (Department of Thermodynamic Sciences, Faculty of Building Services, Technical University of Civil Engineering Bucharest, 020396 Bucharest, Romania)

  • Nicolae N. Antonescu

    (Department of Thermodynamic Sciences, Faculty of Building Services, Technical University of Civil Engineering Bucharest, 020396 Bucharest, Romania)

  • Dan-Paul Stănescu

    (Department of Thermodynamic Sciences, Faculty of Building Services, Technical University of Civil Engineering Bucharest, 020396 Bucharest, Romania)

  • Ilinca Năstase

    (Department of Thermodynamic Sciences, Faculty of Building Services, Technical University of Civil Engineering Bucharest, 020396 Bucharest, Romania)

Abstract

Following the international trend of using hydrogen as combustible in many industry branches, this paper investigates the impact of mixing methane gas with 23% hydrogen (G222) on condensing boilers’ operation. After modeling and testing several boilers with heat exchange surface different designs, the authors gathered enough information to introduce a new concept, namely High-Performance Condensing Boiler (HPCB). All the boilers that fit into this approach have the same operational parameters at nominal heat load, including the CO 2 concentrations in flue gases. After testing a flattened pipes condensing boiler, a CO 2 emission reduction coefficient of 1.1 was determined when converting from methane gas to G222 as combustible. Thus, by inserting into the national grid a G222 mixture, an important reduction in greenhouse gases can be achieved. For a 28 kW condensing boiler, the annual reduction in CO 2 emissions averages 1.26 tons, value which was experimentally obtained and is consistent with the theoretical evaluation.

Suggested Citation

  • Răzvan Calotă & Nicolae N. Antonescu & Dan-Paul Stănescu & Ilinca Năstase, 2022. "The Direct Effect of Enriching the Gaseous Combustible with 23% Hydrogen in Condensing Boilers’ Operation," Energies, MDPI, vol. 15(24), pages 1-12, December.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:24:p:9373-:d:1000069
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    References listed on IDEAS

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    1. Lo Basso, Gianluigi & Nastasi, Benedetto & Astiaso Garcia, Davide & Cumo, Fabrizio, 2017. "How to handle the Hydrogen enriched Natural Gas blends in combustion efficiency measurement procedure of conventional and condensing boilers," Energy, Elsevier, vol. 123(C), pages 615-636.
    2. Lamioni, Rachele & Bronzoni, Cristiana & Folli, Marco & Tognotti, Leonardo & Galletti, Chiara, 2022. "Feeding H2-admixtures to domestic condensing boilers: Numerical simulations of combustion and pollutant formation in multi-hole burners," Applied Energy, Elsevier, vol. 309(C).
    3. Yue Xin & Ke Wang & Yindi Zhang & Fanjin Zeng & Xiang He & Shadrack Adjei Takyi & Paitoon Tontiwachwuthikul, 2021. "Numerical Simulation of Combustion of Natural Gas Mixed with Hydrogen in Gas Boilers," Energies, MDPI, vol. 14(21), pages 1-15, October.
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