As I'm sure some of you are aware, Mercury Arc rectifiers look really cool. (One of my friends went as far as to liken it to an "Alien Uterus") I have been designing a coal gasification plant with power generation from the waste heat. I will have a large battery storage capacity, so all pumps and equipment will be DC. I was trying to justify to myself the use of Mercury Arc Rectifiers to convert 3 phase AC to DC when in reality I could just use a dynamo, simply because they look cool. Then I realized that all dynamos have commutators, and a rectifier could serve the same purpose. Am I correct in this thought?