Page 25 - Climate Control News May 2020

Need Help with Humidity?
Typical cooling systems will “cycle off” once the indoor dry bulb temperature is met regardless of the humidity level. An accompanying Air Change Split Make-Up Air (SMA) unit will provide the much-needed dehumidification of outside air, ensuring a perfect indoor environment.
Typical VRF system in humid part-load scenario:
Outside Air 23/21°C DB/WB (84% RH)
18/17°C DB/WB (91% RH)
18/17°C DB/WB (91% RH)
18/17°C DB/WB (91% RH)
18/15°C DB/WB (73% RH)
18/15°C DB/WB (73% RH)
VRF preconditioning unit.
The downstream units are inactive as the sensible load has already been met, but the supply air is too humid.
VRF system with SMA unit in humid part-load scenario:
Outside Air 23/21°C DB/WB (84% RH)
23/17°C DB/WB (54% RH)
SMA unit.
Room Temperature:
23/19°C DB/WB (69% RH)
Room humidity is too high causing occupant discomfort and mould growth!
Room Temperature:
23/17°C DB/WB (54% RH)
Room humidity is maintained at an acceptable level!
The latent load is addressed, allowing the downstream units to cool according to the sensible load.
SMA Series of energy efficient make-up air dehumidifiers.
Air Change Split Make-Up Air units take humid 100% outside air and supply at a comfortable dehumidified temperature. Models range from 300l/s to 900l/s.
(02) 8774 1400 sales@airchange.com.au
airchangedehumidification.com