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dc.contributor.authorLiu, Peng
dc.contributor.authorJusto Alonso, Maria
dc.contributor.authorMathisen, Hans Martin
dc.identifier.citationBuilding and Environment. 2022, 224 .en_US
dc.description.abstractToday's buildings are becoming more insulated and airtight to reduce transmission heat losses. Energy use for ventilation can represent up to half of these buildings' total energy use. Heat recovery in ventilation and demand-controlled ventilation (DCV) are energy-efficient measures to reduce ventilation energy use, especially when combined. However, this study revealed that the often-overlooked longitudinal heat conduction (LHC) in aluminium rotary heat exchangers might yield less efficient heat exchangers, particularly for intended high-efficiency heat recovery at low ventilation rates in DCV. This study presents a theoretical method to assess the effect of LHC on the amount of energy used to heat ventilation air for several ventilation strategies. The method is demonstrated in a case study for a virtual office building in a cold climate (Oslo, Norway). When neglecting the LHC effect, the energy used to heat the supplied air using DCV with a rotary heat exchanger is about three times smaller than when considering LHC. Unlike earlier studies, we find that DCV may consume more ventilation heating energy than constant air volume (CAV) ventilation when the selected wheel is deep and oversized due to LHC. This study highlights the need to design rotary heat exchangers carefully in order to account for the LHC effect, particularly when targeting zero emission buildings (ZEB).en_US
dc.rightsCC BY 4.0*
dc.subjectEnergy-efficient ventilationen_US
dc.subjectRotary heat exchangeren_US
dc.subjectZero-emission buildingsen_US
dc.subjectLongitudinal heat conductionen_US
dc.titleHeat recovery ventilation design limitations due to LHC for different ventilation strategies in ZEBen_US
dc.title.alternativeHeat recovery ventilation design limitations due to LHC for different ventilation strategies in ZEBen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2022 The authorsen_US
dc.subject.nsiVDP::Teknologi: 500en_US
dc.source.journalBuilding and Environmenten_US
dc.relation.projectNorges forskningsråd: 257660en_US

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