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A Graphical Tool to Estimate the Air Change Efficiency in Rooms with Heat Recovery Systems

Author

Listed:
  • Alberto Meiss

    (E.T.S. Arquitectura, Universidad de Valladolid, 47014 Valladolid, Spain)

  • Miguel Ángel Padilla-Marcos

    (E.T.S. Arquitectura, Universidad de Valladolid, 47014 Valladolid, Spain)

  • Irene Poza-Casado

    (E.T.S. Arquitectura, Universidad de Valladolid, 47014 Valladolid, Spain)

  • Antonio Álvaro-Tordesillas

    (E.T.S. Arquitectura, Universidad de Valladolid, 47014 Valladolid, Spain)

Abstract

Indoor air quality in buildings must be guaranteed for the health and comfort of the occupants. In order to assess the ventilation strategy of a considered room, the parameter of the air change efficiency ( ε a ) can be used. The objective of this work is to provide designers with a graphical tool for a reliable estimate of the value of ε a of a room. The temperature gradient between the outdoor air supply and the indoor air is so low that the ventilation flow can be assumed as isothermal when high-efficiency heat recovery systems are used. By means of charts, the optimal location of the openings for a better ε a can be determined during the design process, in order to subsequently apply them. It is concluded that it is very important to consider the ε a in the case of openings located in facing walls given that its range varies between 40% and 65%. In contrast, its use can be obviated in the case of openings located in non-facing walls, as the value of ε a obtained is close to 50%; this means a perfect mixing air flow pattern, which is the reference value for the estimation of the indoor air quality (IAQ) in the different national regulations.

Suggested Citation

  • Alberto Meiss & Miguel Ángel Padilla-Marcos & Irene Poza-Casado & Antonio Álvaro-Tordesillas, 2020. "A Graphical Tool to Estimate the Air Change Efficiency in Rooms with Heat Recovery Systems," Sustainability, MDPI, vol. 12(3), pages 1-15, January.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:3:p:1031-:d:315034
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    References listed on IDEAS

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    1. Jolanta Šadauskienė & Valdas Paukštys & Lina Šeduikytė & Karolis Banionis, 2014. "Impact of Air Tightness on the Evaluation of Building Energy Performance in Lithuania," Energies, MDPI, vol. 7(8), pages 1-16, August.
    2. Alo Mikola & Raimo Simson & Jarek Kurnitski, 2019. "The Impact of Air Pressure Conditions on the Performance of Single Room Ventilation Units in Multi-Story Buildings," Energies, MDPI, vol. 12(13), pages 1-18, July.
    3. Arman Ameen & Mathias Cehlin & Ulf Larsson & Taghi Karimipanah, 2019. "Experimental Investigation of Ventilation Performance of Different Air Distribution Systems in an Office Environment—Heating Mode," Energies, MDPI, vol. 12(10), pages 1-13, May.
    4. Arman Ameen & Mathias Cehlin & Ulf Larsson & Taghi Karimipanah, 2019. "Experimental Investigation of the Ventilation Performance of Different Air Distribution Systems in an Office Environment—Cooling Mode," Energies, MDPI, vol. 12(7), pages 1-15, April.
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    Cited by:

    1. Ewa Zender–Świercz, 2021. "A Review of Heat Recovery in Ventilation," Energies, MDPI, vol. 14(6), pages 1-23, March.

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