Why don air conditioners have regenerative heat exchangers?
I am not 100% positive, but that answer sounds like it would be correct. I am not really too advanced when it comes to heat exchangers.I recently had to get a new heat exchanger. Luckily I found a great place that made it really easy.
A similar system to what you are describing, only working on the air side, is a wrap-around-heat-pipe. It pre-cools the entering air by a phase change in a refrigerant coil placed in front of the cooling coil, the cooler air hits the cooling coil at a lower temperature improving dehumidifying, then leaves the cooling coil even colder, where it hits the wrap around coil that recools the refrigerant to a liquid phase. The energy hit is in increased fan external static pressure, but the system does dehumidify well.