now let's talk about the quick comparison between the Flooded evaporator and a direct expansion unit for a typical recreational rink application with the flooded Chiller we can have a closer approach between suction temperature and glycol Outlet temperature allowing savings on energy consumption on the compressor by having a high of operation temperature on the opposite side direct expansion requires superheat value in order to guaranteeing the liquid carry over to the compressor the superheat leads to a tighter temperature approach lmtv which is the temperature in relationship between Outlets temperatures dictates the size of the heat exchanger in this case with flooded heat exchanger will need less heat transfer areas and direct expansion these translates into a lower the cost of the heat exchanger however you have to put a separator on top and optimize separator can allow us to work efficiently at the highest possible suction and reduce the ammonia charge step can end up being very close to a direct extension application separators