Natural ventilation with a supply air window and motorized skylight: a field study

Diane Bastien*

*Corresponding author for this work

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Abstract

Fenestration systems that allow air to circulate between window panes, also called ventilated or airflow windows, can be a simple and efficient way to provide or remove air in a building. This contribution presents modelled and experimental results from a field study where a triple-glazed supply air window is installed in the bedroom of a small, airtight house. A motorized skylight in the living room completes this natural ventilation system. Simulations of the ventilated cavity following ISO 15099 reveal an effective U-value 12-26% lower and a heat recovery efficiency of 58-38% when under a natural ventilation regime and a constant airflow of 14.4 m3/s. The temperature and CO2 levels in the bedroom and living room and window air outlet velocity were measured during 2 nights of single occupancy and 2 nights of double occupancy. Experimental data reveal a dynamic airflow through the ventilated window where local wind conditions have a large influence on the airflow. Effective average room ventilation flow rate between 27 and 42 m3/s were calculated with the transient mass method. This ventilation system is simple, silent and provided satisfactory indoor air quality in the building.
Original languageEnglish
Title of host publicationVentilation Strategies and Measurement Techniques
Number of pages6
Volume3
Publication dateSep 2019
DOIs
Publication statusPublished - Sep 2019
Event10th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings, IAQVEC 2019 - Bari, Italy
Duration: 5. Sep 20197. Sep 2019

Conference

Conference10th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings, IAQVEC 2019
CountryItaly
CityBari
Period05/09/201907/09/2019
SeriesIOP Conference Series: Materials Science and Engineering
Volume609
ISSN1757-8981

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Bastien, D. (2019). Natural ventilation with a supply air window and motorized skylight: a field study. In Ventilation Strategies and Measurement Techniques (Vol. 3). IOP Conference Series: Materials Science and Engineering, Vol.. 609 https://doi.org/10.1088/1757-899X/609/3/032005