Efects of perceived indoor temperature on daylight glare perception

YAMIN GARRETÓN, JULIETA ALEJANDRA; RODRIGUEZ, ROBERTO GERMÁN; PATTINI, ANDREA ELVIRA

BUILDING RESEARCH AND INFORMATION

TAYLOR & FRANCIS LTD

Lugar: Londres; Año: 2015 vol. 44 p. 1 - 14

0961-3218

This research investigates the effects of perceived indoor temperature on glare sensation. A laboratory experiment wascarried out where volunteers (n 5 19) performed an office-like computer task. Three scenarios with sunspots over thedesk were evaluated: a cold scenario, a comfort scenario and a hot scenario. All had the same vertical illuminance atthe eye and luminance ratios. Discomfort glare was measured with the predictive daylight glare probability (DGP)model; actual perception of glare was assessed with glare sensation vote (GSV) scale; while thermal comfort wasevaluated with thermal sensation vote (TSV) scale. In order to know how much the perceived temperaturecontributes to the model, an ordinal regression was performed. The result showed a Nagelkerke pseudo-R2 50.52, p 5 0.001, indicating that the perceived temperature affected glare predictions. This is an improvement in theunderstanding of daylight glare, which will allow researchers and practitioners to make informed decisions aboutsustainable design and occupant comfort. In conclusion, a more comprehensive glare model should include perceivedtemperature as a variable of the current glare model. Also, the results suggest that DGP should be used only when theperson is in thermal comfort.