Show simple item record

dc.contributor.authorConnick, Owenen
dc.contributor.authorHunt, Garyen
dc.date.accessioned2019-11-29T00:30:59Z
dc.date.available2019-11-29T00:30:59Z
dc.date.issued2020-02en
dc.identifier.issn0360-1323
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/299442
dc.description.abstractA supply fan and an extract fan, at identical settings in identical rooms, do not necessarily have the same effect on the ventilation. For a heated room in which the floor-level vents are larger than the ceiling-level vents, we show that an extract fan provides better ventilation than a supply fan. If the ceiling-level vents are larger, we show that a supply fan is more effective; this for the same, constant fan airflow rate. We investigate the hybrid ventilation of a room in which the, otherwise buoyancy-driven, ventilation is augmented by a forced volume flux, provided by a supply or extract fan. In hybrid ventilation, naturally-occurring and mechanically-imposed pressure differences combine to determine the resulting ventilation airflow. Herein, a mathematical model is developed which enables prediction of: the inflow and outflow volume fluxes; the vertical position of the neutral pressure level; and the steady, uniform temperature, with in a single, isolated room in hybrid ventilation. The physical problem is reduced to a mathematical model with two controlling parameters; namely, the effective vent area ratio, R*, and a ratio of forced and natural volume fluxes, Q_F/Q_N. We demonstrate that the volume flux through an open vent can be controlled remotely, by mechanically imposing the volume flux through an entirely separate vent.
dc.publisherElsevier
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectHybrid ventilationen
dc.subjectNatural ventilationen
dc.subjectLow-energy ventilationen
dc.subjectMixed-mode ventilationen
dc.subjectBuoyancy-drivenen
dc.titleHybrid ventilation of a room: A theoretical model for the combined effects of mechanically-imposed and buoyancy-induced driving pressuresen
dc.typeArticle
prism.numberARTN 106546en
prism.publicationDate2020en
prism.publicationNameBUILDING AND ENVIRONMENTen
prism.volume169en
dc.identifier.doi10.17863/CAM.46511
dcterms.dateAccepted2019-11-12en
rioxxterms.versionofrecord10.1016/j.buildenv.2019.106546en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-02en
dc.contributor.orcidHunt, Gary [0000-0001-9875-9274]
dc.identifier.eissn1873-684X
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (EP/N010221/1)
cam.orpheus.successThu Jan 30 10:34:23 GMT 2020 - Embargo updated*
rioxxterms.freetoread.startdate2020-11-18


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's licence is described as Attribution-NonCommercial-NoDerivatives 4.0 International