Ventilated wooden roofs: Influence of local weather conditions - measurements. (October 2017)

• Record Type: Journal Article
• Authors: Gullbrekken, Lars; Kvande, Tore; Time, Berit
• Is Part Of: Energy procedia. Volume 132(2017)
• Page Start: 777
• Page End: 782
• Publication Date: 2017-10
• Subjects: Roof -- Pitched -- Wooden -- Field experiments -- wind speed -- air velocity; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.10.029
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: This study investigates the influence of temperature and air velocity conditions on ventilation and condensation in spring, summer and autumn periods inside a ventilated cavity in a full-scale wooden roof construction. The roof has 81 thermocouples, four air velocity measurement devices, and a weather station to record temperature and wind velocity. The temperature measurements show large periods of below-ambient temperature, especially during the spring and autumn. A strong correlation exists between the wind speed and air velocity inside the air cavity. Eave-to-eave ventilation was found to be effective, even with a roof angle of 40°.