Airflow Measurement of the Car HVAC Unit Using Hot-wire Anemometry

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dc.contributor.authorFojtlín, Milošcs
dc.contributor.authorPlanka, Michalcs
dc.contributor.authorFišer, Jancs
dc.contributor.authorPokorný, Jancs
dc.contributor.authorJícha, Miroslavcs
dc.coverage.issue2016cs
dc.coverage.volume114cs
dc.date.accessioned2020-08-04T11:02:32Z
dc.date.available2020-08-04T11:02:32Z
dc.date.issued2016-03-28cs
dc.description.abstractThermal environment in a vehicular cabin significantly influence drivers’ fatigue and passengers’ thermal comfort. This environment is traditionally managed by HVAC cabin system that distributes air and modifies its properties. In order to simulate cabin thermal behaviour, amount of the air led through car vents must be determined. The aim of this study was to develop methodology to measure airflow from the vents, and consequently calculate corresponding air distribution coefficients. Three climatic cases were selected to match European winter, summer, and spring / fall conditions. Experiments were conducted on a test vehicle in a climatic chamber. The car HVAC system was set to automatic control mode, and the measurements were executed after the system stabilisation—each case was independently measured three times. To be able to evaluate precision of the method, the airflow was determined at the system inlet (HVAC suction) and outlet (each vent), and the total airflow values were compared. The airflow was calculated by determining a mean value of the air velocity multiplied by an area of inlet / outlet cross-section. Hot-wire anemometry was involved to measure the air velocity. Regarding the summer case, total airflow entering the cabin was around 57 l s-1 with 60 % of the air entering the cabin through dashboard vents; no air was supplied to the feet compartment. The remaining cases had the same total airflow of around 42 l s-1, and the air distribution was focused mainly on feet and windows. The inlet and outlet airflow values show a good match with a maximum mass differential of 8.3 %.en
dc.formattextcs
dc.format.extent173-178cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationEPJ Web of Conferences. 2016, vol. 114, issue 2016, p. 173-178.en
dc.identifier.doi10.1051/epjconf/201611402023cs
dc.identifier.issn2100-014Xcs
dc.identifier.other123860cs
dc.identifier.urihttp://hdl.handle.net/11012/70018
dc.language.isoencs
dc.publisherEDP Sciencescs
dc.relation.ispartofEPJ Web of Conferencescs
dc.relation.urihttp://dx.doi.org/10.1051/epjconf/201611402023cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2100-014X/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectThermal comforten
dc.subjectCaren
dc.subjectCabin ventilationen
dc.subjectVelocity measurementen
dc.subjectEnergyen
dc.titleAirflow Measurement of the Car HVAC Unit Using Hot-wire Anemometryen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-123860en
sync.item.dbtypeVAVen
sync.item.insts2020.08.04 13:02:32en
sync.item.modts2020.08.04 12:19:42en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Energetický ústavcs
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