Assessing airflow rates of a naturally ventilated test facility using a fast and simple algorithm supported by local air velocity measurements

13159 17 60991 3 168209 document 60991 De Vogeleer et al 2016.pdf application/pdf 4c5bc11ce32ffce79043b509b8abc52b MD5 1470321 2016-06-07 06:22:43 https://pure.iiasa.ac.at/id/eprint/13159/1/De%20Vogeleer%20et%20al%20%202016.pdf 13159 1 1 application/pdf text en public cc_by

De Vogeleer et al 2016.pdf

60992 2 168212 document 60992 lightbox.jpg image/png 6fca82349733e3ddb8f4927f73d66de6 MD5 45254 2016-06-07 06:23:12 https://pure.iiasa.ac.at/id/eprint/13159/2/lightbox.jpg 13159 2 2 image/png other Thumbnails conversion from text to thumbnail_lightbox en staffonly

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/60991 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/60991 http://eprints.org/relation/isIndexCodesVersionOf https://pure.iiasa.ac.at/id/document/60991 archive 2 disk0/00/01/31/59 2016-05-09 12:43:58 2021-08-27 17:41:10 2016-05-09 12:43:58 article show De Vogeleer G. Van Overbeke P. Brusselman E. Mendes L.B. 2100 Pieters J.G. Demeyer P. Assessing airflow rates of a naturally ventilated test facility using a fast and simple algorithm supported by local air velocity measurements pub prog_air prog_esm prog_mag The high spatial and temporal variations of airflow patterns in ventilation openings of naturally ventilated animal houses make it difficult to accurately measure the airflow rate. This paper focuses on the development of a fast assessment technique for the airflow rate of a naturally ventilated test facility through the combination of a linear algorithm and local air velocity measurements. This assessment technique was validated against detailed measurement results obtained by the measuring method of Van Overbeke et al. (2015) as a reference. The total air velocity |u-|, the normal |Y-| and tangential velocity component |x-| and the velocity vector u- measured at the meteomast were chosen as input variables for the linear algorithms. The airflow rates were split in a group where only uni-directional flows occurred at vent level (no opposite directions of |Y-| present in the airflow pattern of the opening), and a group where bi-directional flows occurred (the air goes simultaneously in and out of the opening). For airflow rates with uni-directional flows the input variables u- and |Y-| yielded the most accurate results. For this reason, it was suggested to use the |Y-| instead of |u-| in ASHRAE’s formula of Q = E × A × |u-|. For bi-directional flows a multiple linear model was suggested where input variable u- gave the best results to assess the airflow rate. 2016-08-01 published Elsevier 10.1016/j.buildenv.2016.05.006 25 public Building and Environment 104 198-207 TRUE 0360-1323 FALSE no info:eu-repo/semantics/article