Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-23158
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dc.contributor.authorHadengue, Bruno-
dc.contributor.authorMorgenroth, Eberhard-
dc.contributor.authorLarsen, Tove A.-
dc.contributor.authorBaldini, Luca-
dc.date.accessioned2021-09-18T13:20:53Z-
dc.date.available2021-09-18T13:20:53Z-
dc.date.issued2022-01-01-
dc.identifier.issn0306-2619de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/23158-
dc.description.abstractIn the effort to de-carbonize the building stock, heat pumps are increasingly utilized in Switzerland, with 70% of the fast-growing heat pump market using ambient air as heat source. Inexpensive and easy to implement, these heat pumps are, however, less efficient than their ground- or water-source counterparts. In this modeling study, we aim at increasing the efficiency of air-source heat pumps using domestic greywater-contained heat. We assess the performance improvement relative to standard heat pump configurations across various climates, seasons, building envelopes, and domestic hot water consumption patterns. The results show that the annually-averaged coefficient of performance improves by 4.1% on average – ranging from 0.6% to 7.5%. This efficiency gain translates on average to 1.8 kWh/week of compressor electricity savings. Although attractive due to its simplicity, the proposed open-loop configuration – preheating of an external heat source – only leads to moderate performance improvement of air-source heat pumps. Based on these results, we extensively discuss and compare alternative system configurations and identify several fundamental differences in the heat recovery dynamics of each configuration. We show that closed-loop systems – using greywater as direct heat source – show the largest performance improvement potential, although being more expensive and complex to implement.de_CH
dc.language.isoende_CH
dc.publisherElsevierde_CH
dc.relation.ispartofApplied Energyde_CH
dc.rightshttp://creativecommons.org/licenses/by/4.0/de_CH
dc.subjectGreywater heat recoveryde_CH
dc.subjectDecentralizedde_CH
dc.subjectHeat pumpde_CH
dc.subjectDomestic hot waterde_CH
dc.subjectWastewaterde_CH
dc.subjectEnergy efficiencyde_CH
dc.subject.ddc620: Ingenieurwesende_CH
dc.titlePerformance and dynamics of active greywater heat recovery in buildingsde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementArchitektur, Gestaltung und Bauingenieurwesende_CH
zhaw.organisationalunitZentrum Bautechnologie und Prozesse (ZBP)de_CH
dc.identifier.doi10.1016/j.apenergy.2021.117677de_CH
dc.identifier.doi10.21256/zhaw-23158-
zhaw.funding.euNode_CH
zhaw.issue117677de_CH
zhaw.originated.zhawYesde_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume305de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
zhaw.author.additionalNode_CH
zhaw.display.portraitYesde_CH
Appears in collections:Publikationen Architektur, Gestaltung und Bauingenieurwesen

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