I really feel you could have done a better job dividing the panels. The image does lend itfel to a triptych, but not in the manner in which you have cut it. If you had kept the (i dont know what to call them) stations? that the air trams go thorugh both on the inside or both on the outside of the middle panel instead of awkwardly cutting them in half on both sides, this image would be a lot stronger as a triptych.
How does the division of your picture into three frames enhance the photo? How does this "tell...a story or illustrates a concept or object" better than the original image?
I know this meets the challenge, but I am not a big fan on just cutting up one nice shot into 3 with distracting borders. Seems too easy, no real creativity required.
You have divided your subject well, but the black frame loses its impact when it gets into the dark areas. I think the picture would have been better in color with the black frame, or b&w with a colored frame.