Thats a pretty good unit for a direct die phase change setup actually. Change the gas to R-22 or R-290 (propane) and suddenly you have a low temperature compressor
Not sure how well it would work for cooling multiple things though. Direct die is limited to one device per compressor more or less. You'd have to watercool those items and then use the compressor to chill the water. In this case bigger is better. A 1/4 HP is tons of power for a DD, but less for direct die. You could still get below zero pretty easy though, even as a chiller. Just not the maybe -30 or -40 range a direct die could do with some work and tweaking.