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Article

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

1
Alaska Center for Energy and Power, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
2
Cold Climate Housing Research Center, Fairbanks, AK 99775, USA
3
Bristol Bay Campus, University of Alaska Fairbanks, Dillingham, AK 99576, USA
4
Department of Mechanical Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
5
National Renewable Energy Laboratory, Golden, CO 80401, USA
*
Author to whom correspondence should be addressed.
Energies 2021, 14(2), 351; https://doi.org/10.3390/en14020351
Received: 17 November 2020 / Revised: 3 January 2021 / Accepted: 5 January 2021 / Published: 10 January 2021
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. View Full-Text
Keywords: heat recovery ventilator (HRV); recovery efficiency; ducts heat recovery ventilator (HRV); recovery efficiency; ducts
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MDPI and ACS Style

Marsik, T.; Bickford, R.; Dennehy, C.; Garber-Slaght, R.; Kasper, J. Impact of Intake and Exhaust Ducts on the Recovery Efficiency of Heat Recovery Ventilation Systems. Energies 2021, 14, 351. https://doi.org/10.3390/en14020351

AMA Style

Marsik T, Bickford R, Dennehy C, Garber-Slaght R, Kasper J. Impact of Intake and Exhaust Ducts on the Recovery Efficiency of Heat Recovery Ventilation Systems. Energies. 2021; 14(2):351. https://doi.org/10.3390/en14020351

Chicago/Turabian Style

Marsik, Tom, Riley Bickford, Conor Dennehy, Robbin Garber-Slaght, and Jeremy Kasper. 2021. "Impact of Intake and Exhaust Ducts on the Recovery Efficiency of Heat Recovery Ventilation Systems" Energies 14, no. 2: 351. https://doi.org/10.3390/en14020351

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