energies Article Towards Zero Energy Stadiums: The Case Study of the Dacia Arena in Udine, Italy Mattia Manni 1 , Valentina Coccia 1,2, Andrea Nicolini 1,2 , Guido Marseglia 3 and Alessandro Petrozzi 1,* 1 CIRIAF—Interuniversity Research Centre on Pollution and Environment "Mauro Felli", ...