“…Again, note that the GA may generate thick PCM slabs by placing several adjacent PCM layers in the wall. Considering 6 melting temperatures (i.e., T m ¼ 20, 21,22,23,24, and 25 C for Orlando, and 0, 4, 8, 12, 16, 20 C for Qué bec City), the total number of possible materials is 8 for each layer. There are thus 2 60 possible wall configurations.…”