4 - Mainly for the potential. Criticism; firstly needs to be 640, in this case height. I see more potential in this shot than has been 'captured', whether you've lost some with the b/w not sure, but the unusual wall pattern, 'shapes' of the silos/tanks, the windows, etc, all could have been 'used' more in my opinion to give this extra punch, especially with the other similar shots you are competing against.
Good contrast, the steam looks quite smooth, i like that. Maybe the lights on the bottom of the picture are bit too dominant. Works well in black/white.