Heat gain reduction using solar chimney window driven by pv-powered fan

This study investigated the performance of a solar chimney window equipped with a PV-powered fan (SCW-PV) in reducing heat gain and improving ventilation in buildings. The research methodology involved comparative testing of two houses: one with a common glazed window (reference) and the other with the SCW-PV installed. The SCW-PV consisted of two glass layers with an aluminum frame, vents at the top and bottom, and a DC fan connected to a PV panel without a battery. This field test investigated the variables of temperature and heat transfer reduction, with data collected during daytime hours on clear-sky days. Temperature, heat flux, and air velocity sensors were calibrated and recorded the data. Results showed that the SCW-PV effectively lowered the room space temperature compared to the common glazed window, reducing window heat gain by 10 – 20 W/m2 (15 – 55% reduction). The ventilation rate through the SCW-PV ranged from 15 – 50 m3/h, corresponding to 5.2 – 17.4 air changes per hour (ACH) in the 2.88 m3 room. The findings suggest that the SCW-PV is a significant tool for reducing window heat gain, minimizing heat accumulation in room spaces, and improving indoor thermal comfort. Therefore, the SCW-PV is recommended for implementation in buildings to enhance energy efficiency and occupant comfort. GRAPHICAL ABSTRACT HIGHLIGHTS Heat Gain Reduction: Achieved a 10-20 W/m² reduction in window heat gain, equating to a 15-55% decrease. Ventilation Improvement: Ventilation rate through the SCW-PV ranged from 15-50 m³/h, resulting in 5.2-17.4 air changes per hour (ACH) in a 2.88 m³ room.