I mentioned this in the Android brewing software discussion, but I figured it warranted its own thread. IMHO, it'd be swell if there were real time IBU approximation incorporated into the hop addition section of (insert brewing software of choice). For sh*ts and giggles, I whipped up a Java app showing that it can be done. It's a pretty rough hack, but you'll get the idea. It decreases the actual volume and increases the SG based on a user defined boil off rate and pre-boil volume/SG. The IBU calculation is based on actual volume/SG at each update.
[ame=http://www.youtube.com/watch?v=9xhJVWBrnwo]YouTube - Running IBU calculator[/ame]
The actual utility of such a feature may be somewhat limited, but I find it fascinating to see how the wort changes over time.
[ame=http://www.youtube.com/watch?v=9xhJVWBrnwo]YouTube - Running IBU calculator[/ame]
The actual utility of such a feature may be somewhat limited, but I find it fascinating to see how the wort changes over time.