HEAT TRANSFER ANALYSIS FOR A TRANSPIRED SOLAR COLLECTOR NUMERICAL MODEL

A numerical campaign is dedicated to evaluate some characteristics of a certain type of solar collectors which have a significant influence on the heat transfer between the metal plate and the air passing through. Two different perforation types were studied during numerical investigation. The complex fluid dynamics generated by certain types of the geometries can be directly linked to the temperature increase of airflow. The study reveals the importance of certain characteristics of solar collectors which can improve with almost 15% the thermal efficiency. Changing the shape of the perforations, it will generate complex fluid dynamics, resulting in a higher efficiency of heat recovery of these devices. Extended to a real scale building, we can obtain high energy savings for pre-heating the introduced fresh air. Unglazed transpired solar walls improve their thermal efficiency with a significant rate for the case of innovative perforations