Page 117 - New Trends in Green Construction

TESTING OVERHEATING IN AN UNGLAZED TRANSPIRED COLLECTOR IN THE SUMMER SEASON
F. Peci, F. Comino. F. Taboas, M. Ruiz de Adana
Keywords: unglazed transpired facades, solar façade, solar collector 1. Introduction
Nowadays, the utilization of renewable energy sources in buildings is required to minimize the total energy consumption and gas emissions. Solar energy is the main source of energy available and it is used in different ways, solar façades being one of them. However, not every climate could be suitable for using this system. Solar facades provide heating during the winter season, but in the hot season overheating could be a problem, as it increases the thermal loads of the building (Yu et al. 2017). This study shows a comparison of the heat transfer rate between façades with and without an unglazed solar collector (UTC) façade under hot summer climatic conditions.
2. Materials and methods
A test cell with an experimental module of UTC was set outdoors under real weather conditions, see figure below. The heat transfer through the insulation panels was measured using two heat flux probes installed in the section of the façade with UTC and in the section without solar façade. The measurements were taken for seven days in the summer season in Cordoba, Spain. The weather during the test was very hot and dry, reaching temperatures above 40 oC. The UTC façade ventilation was on, and the heated air was exhausted.
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