Option IV: Schedule of DOAS System with Cooling Coil and Active Dessicant Wheel
(React with Condenser Heat at 120ºF)
OP TION V: Rotar y Pas sive desiccant
heat exchanger with cooling coil and
Passive desiccant dehumidification wheel
(EW+CC+PDHC)
This approach utilises the strengths of passive
total energy recovery, conventional cooling
and a new type of desiccant rotor, the passive
dehumidification wheel. The ability of this system
lies in the fact that it optimises the moisture
removal between the cooling coil and the desiccant
wheel without the need of active reactivation. The
passive desiccant wheel removes moisture from
saturated air streams in a highly energy efficient
manner.
The benefits of this option are:
i) Extremely good RH control in all seasons,
ii) High energy efficiency,
iii) Lower dew point of supply than the other
three options,
iv) Versatile and adjusts well to varying
climate,
v) Installed tonnage reduction for the HVAC
system, and
vi) Substantial LEED points.
Option V: Schedule of DOAS with Enthalpy Wheel, Cooling Coil and Passive Dessicant Wheel
37