Quote Originally Posted by jinu117 View Post
Can't really beat the direct heat exchange I think in cascade. Why would we want to put 2 heat exchange I wonder. Water cooled condenser in first stage might not be bad idea but since condensers for cascade tend to big, not sure if there will be any gain...

I can say for sure that there are gains to be had, take a look at Baz's work log:http://www.xtremesystems.org/forums/...d.php?t=152749