I'm feeling  on a lot of things, but for just consistency's sake, I vote for Chinese yuan. It's unlikely if not inconceivable that someone would link to Chinese yuan if they meant the dynasty, and as soon as you start reading the article you gonna know what it's about.
P.S. It also appears that the phrase Chinese yuan is not unheard-of, if only for - aha! - consistency, and to make it clear what country's currency it is. On the flipside, though, I will say, what're the odds someone'll link to Yuan when they meant to link to Yuan dynasty? Wiki Wikardo