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Fluids 2018, 3(4), 68;

Ventilative Cooling in a School Building: Evaluation of the Measured Performances

Department of Civil Engineering, Katholieke Universiteit Leuven, Construction Technology Cluster, Sustainable Building, Technology Campus Ghent, 9000 Ghent, Belgium
Author to whom correspondence should be addressed.
Received: 26 August 2018 / Revised: 13 September 2018 / Accepted: 18 September 2018 / Published: 23 September 2018
(This article belongs to the Special Issue Ventilation and Passive Cooling for Healthy and Comfortable Buildings)
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The test lecture rooms on Katholieke Universiteit Leuven (KU Leuven) Ghent Technology Campus (Belgium) are a demonstration case of Annex 62: Ventilative Cooling of the International Energy Agency’s Energy in Buildings and Communities programme (IEA EBC). The building is cooled by natural night ventilation and indirect evaporative cooling (IEC). Thermal comfort and the performances of ventilative cooling are evaluated. Long-term measurements of internal temperatures, occupancy, opening of windows and IEC were carried out in the cooling season of 2017. The airflow rates through the windows in cross- and single-sided ventilation mode were measured by both tracer gas concentration decay and air velocity measurements. In addition, the air flow pattern is visualized by measuring air temperatures in the room. The results show that good thermal summer comfort was measured except during heat waves and/or periods with high occupancy. Both nighttime ventilation and IEC operate very well. IEC can lower the supply temperature by day significantly compared to the outdoor temperature. The Air Changes Rates (ACR) of the night ventilation greatly depends on wind direction and velocity. The air temperature profile showed that the air is cooled down in the whole lecture but more in the upper zone. The extensive data monitoring system was important to detect malfunctions and to optimize the whole building performance. View Full-Text
Keywords: ventilative cooling; nearly zero-energy buildings (nZEB); school building; measurements; thermal comfort ventilative cooling; nearly zero-energy buildings (nZEB); school building; measurements; thermal comfort

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Breesch, H.; Merema, B.; Versele, A. Ventilative Cooling in a School Building: Evaluation of the Measured Performances. Fluids 2018, 3, 68.

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