There are a number of plugins for Firefox that I use regularly to schedule regular refreshes on pages like Google Finance that I like to keep current throughout the day.  In its infancy, Chrome does not have a built in way of doing this.

I found a nice solution here on a forum, posted by user gl0rfindel.  Create a bookmark pointing to the url:

javascript:
timeout=prompt("Set timeout [s]");
current=location.href;
if(timeout>0)
  setTimeout('reload()',1000*timeout);
else
  location.replace(current);
function reload(){
  setTimeout('reload()',1000*timeout);
  fr4me='<frameset cols='*'>n<frame src=''+current+''/>';
  fr4me+='</frameset>';
  with(document){write(fr4me);void(close())};
}

Clicking the bookmark will let you specify how regularly (in s) to refresh the current active tab.