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Impact of Intake and Exhaust Ducts on the Recovery Efficiency of Heat Recovery Ventilation Systems

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  • Tom Marsik

    (Alaska Center for Energy and Power, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
    Cold Climate Housing Research Center, Fairbanks, AK 99775, USA
    Bristol Bay Campus, University of Alaska Fairbanks, Dillingham, AK 99576, USA)

  • Riley Bickford

    (Alaska Center for Energy and Power, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
    Cold Climate Housing Research Center, Fairbanks, AK 99775, USA
    Department of Mechanical Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, USA)

  • Conor Dennehy

    (Cold Climate Housing Research Center, Fairbanks, AK 99775, USA
    National Renewable Energy Laboratory, Golden, CO 80401, USA)

  • Robbin Garber-Slaght

    (Cold Climate Housing Research Center, Fairbanks, AK 99775, USA
    National Renewable Energy Laboratory, Golden, CO 80401, USA)

  • Jeremy Kasper

    (Alaska Center for Energy and Power, University of Alaska Fairbanks, Fairbanks, AK 99775, USA)

Abstract

The heat recovery efficiency of ventilation systems utilizing heat recovery ventilators (HRVs) depends not only on the heat recovery efficiency of the HRV units themselves but also on the intake and exhaust ducts that connect the HRV units to the outside environment. However, these ducts are often neglected in heat loss calculations, as their impact on the overall heat recovery efficiency of HRV systems is often not understood and, to the knowledge of the authors, a mathematical model for the overall heat recovery efficiency of HRV systems that accounts for these ducts has not been published. In this research, a mathematical model for the overall heat recovery efficiency of HRV systems that accounts for the intake and exhaust ducts was derived and validated using real-life data. The model-predicted decrease in heat recovery efficiency due to the ducts was in reasonable agreement (relative error within 20%) with the real-life measurements. The results suggest that utilizing this model allows for more correct ventilation heat loss calculations compared to using the heat recovery efficiency of the HRV unit alone, but more field studies are needed to verify the accuracy of this model in a wide range of applications.

Suggested Citation

  • Tom Marsik & Riley Bickford & Conor Dennehy & Robbin Garber-Slaght & Jeremy Kasper, 2021. "Impact of Intake and Exhaust Ducts on the Recovery Efficiency of Heat Recovery Ventilation Systems," Energies, MDPI, vol. 14(2), pages 1-10, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:2:p:351-:d:477998
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    References listed on IDEAS

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    1. Bao, Lingling & Wang, Jinggang & Yang, Hongxing, 2016. "Investigation on the performance of a heat recovery ventilator in different climate regions in China," Energy, Elsevier, vol. 104(C), pages 85-98.
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    Cited by:

    1. Jinfei Sun & Zhengen Ren & Jianxiang Guo, 2023. "Mechanical Ventilation Heat Recovery Modelling for AccuRate Home—A Benchmark Tool for Whole House Energy Rating in Australia," Energies, MDPI, vol. 16(19), pages 1-22, September.

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