Hi all,

I need to pick some brains.

I have to create a large coldroom (to be operated at 0C) and have selected the evaporator with the following:
  • 3 off evaporators
  • 25 kW duty
  • Propylene glycol (35%) Supply/Return at -10C / -6C
  • Air on / Air off at 2C / 0C
  • 2off 800 diameter fans (100 Pa) per unit
From the above evaporators can be selected.

Here comes my Story/Question: During the early project lifespan, the Coldroom shall be used for other purpose and operate at 20C (air off). However, the 3 evaporators must not change when changing from a 20C room to 0C room.

From my calculations - when operating at 20C, the evaporators are physically oversized as the LMTD differ greatly.

Any tips?
Does this mean that my valve station will be modulating alot?
Has anyone done this before.
Whats the dehumidification effect?

Regards,