A computational method to optimize energy savings of tension structures set in road tunnels

Abstract

Abstract.After the successful introduction of transparent tension structures in the portal of road tunnels as an effective measure for energy savings, optimization of such savings has been sought. A computational method based on graphical design capable to simulate the optical properties of the sun, any transparent tension structure and any road tunnel whatever its orientation, has been developed and presented in this paper. A comparison with measurements in a real tension structure placed in the entrance portal of one real tunnel is performed and discussed.

Computational Simulation versus Scale Model to determine the Optimal Shape of Tension Structures for the use of Sunlight in Road Tunnels

“…However, because this procedure costs materials and time, a most economical method has also been investigated. So, free software commonly used in graphic design and cartoon movies has been used [6] to virtually simulate the insolation conditions of one specific tunnel in the most critical hours of the day, model different tension structures with different coatings and finally get the input for the ESTS equation, S.…”