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Evaluation of the humidity performance of a carbon dioxide (CO2) capture device as a novel ventilation strategy in buildings

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  • Kim, Moon Keun
  • Baldini, Luca
  • Leibundgut, Hansjürg
  • Wurzbacher, Jan Andre

Abstract

This study examines the moisture performance of a carbon dioxide (CO2) adsorption device and its utilization as a novel ventilation strategy in buildings. The device adsorbs CO2 and a small amount of moisture in the CO2 capture process. To activate a CO2 capture device for air recirculation in a building or connect it to an air handling unit to minimize the ventilation rate, the air needs to be controlled to have a steady-state humidity ratio below 12 g/kg, which is the maximum humidity ratio allowed in a room according to international standards. This study exhibits the moisture performance of an implemented CO2 capture device in the operation of an air ventilation system and its ability to recirculate indoor air via experimentation and numerical modeling for saving energy in buildings. Moreover, this research also evaluates the humidity performance using the strategy of connecting the CO2 capture device with an air handling unit and recirculating the air in the breathing zone based on an occupancy diversity factor. Based on these results, the study indicates that the air recirculation achieved by either using the CO2 capturing unit itself or connecting it to an air handling unit reduces not only the thermal energy load but also the energy load of dehumidifying the air in buildings. This work newly introduces the humidity performance of a CO2 capture device for air ventilation in buildings, and the novel ventilation paradigm can adjust the supply outdoor airflow rates depending on the surrounding environment and occupant behavior.

Suggested Citation

  • Kim, Moon Keun & Baldini, Luca & Leibundgut, Hansjürg & Wurzbacher, Jan Andre, 2020. "Evaluation of the humidity performance of a carbon dioxide (CO2) capture device as a novel ventilation strategy in buildings," Applied Energy, Elsevier, vol. 259(C).
    • Handle: RePEc:eee:appene:v:259:y:2020:i:c:s0306261919304830
    DOI: 10.1016/j.apenergy.2019.03.074
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    References listed on IDEAS

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    1. Ji, Long & Yu, Hai & Li, Kangkang & Yu, Bing & Grigore, Mihaela & Yang, Qi & Wang, Xiaolong & Chen, Zuliang & Zeng, Ming & Zhao, Shuaifei, 2018. "Integrated absorption-mineralisation for low-energy CO2 capture and sequestration," Applied Energy, Elsevier, vol. 225(C), pages 356-366.
    2. Shen, Yao & Jiang, Chenkai & Zhang, Shihan & Chen, Jun & Wang, Lidong & Chen, Jianmeng, 2018. "Biphasic solvent for CO2 capture: Amine property-performance and heat duty relationship," Applied Energy, Elsevier, vol. 230(C), pages 726-733.
    3. Lai, Qinghua & Diao, Zhijun & Kong, Lingli & Adidharma, Hertanto & Fan, Maohong, 2018. "Amine-impregnated silicic acid composite as an efficient adsorbent for CO2 capture," Applied Energy, Elsevier, vol. 223(C), pages 293-301.
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    Citations

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    Cited by:

    1. Wahiba Yaïci & Evgueniy Entchev & Michela Longo, 2022. "Recent Advances in Small-Scale Carbon Capture Systems for Micro-Combined Heat and Power Applications," Energies, MDPI, vol. 15(8), pages 1-30, April.
    2. Li, Chunxiao & Cui, Can & Li, Ming, 2023. "A proactive 2-stage indoor CO2-based demand-controlled ventilation method considering control performance and energy efficiency," Applied Energy, Elsevier, vol. 329(C).
    3. Chen, S. & Shi, W.K. & Yong, J.Y. & Zhuang, Y. & Lin, Q.Y. & Gao, N. & Zhang, X.J. & Jiang, L., 2023. "Numerical study on a structured packed adsorption bed for indoor direct air capture," Energy, Elsevier, vol. 282(C).

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