Psychrologix™ Advanced Chiller Controller
Programmable Chiller Automation w/ DHC (Dynamic Humidity Control)
The Psychrologix™ chiller controller is ideal for homes, small business,
or server-room cooling applications where tight humidity control and
increased efficiency is required.
The controller manages humidity, efficiency optimization, alarms,
automatic switchover from cooling to heating, summer and winter
vacation modes, and more.
Controls up to three chillers either in lead-lag or combined as a single larger chiller.
Chiltrix small air cooled chillers with Psychrologix™ control use a
unique psychrometric controls approach coupled with variable speed
compressors, variable speed pumps, variable speed fans, etc. The
Chiltrix chillers match their capacity to the load so precisely that
often buffer tanks are not needed. Not only is capacity matched in real
time, but the parameters are continuously adjusted in response to
conditions. For example, when more dehumidification is needed, the
Psychrologix™ DHC controller lowers the indoor unit coil temperature to
remove more humidity. When humidity is under control, the system raises
the coil temperature to a more energy efficient temperature that still
provides the needed cooling, but does not remove as much humidity, or
may at times remove no humidity at all if humidity is already low
Humidity removal (dehumidification, or latent heat removal) is very
energy intensive and consumes a large part of the total energy used by
an air conditioner. When needed, dehumidification is a good thing and
the Chiltrix chillers do an outstanding job of humidity removal.
Chiltrix chillers with psychrometric controls can also automatically
perform hyper-dehumidification by increasing humidity removal to levels
that surpass those of a normal chiller or air conditioner, if needed, to
deal with extra high humidity.
Humidity does not pass through walls like heat, it
requires an air flow from a more humid area, like for example, a door
opening to the outside on a humid day, or an internal source such as a
steamy hot shower or people exercising, etc. Once indoor humidity is
under control and within the user-defined range, humidity should remain
low for extended periods without additional dehumidification unless
additional humidity is introduced into the space. During periods when
humidity is in range, the Psychrologix™ DHC controller will
automatically adjust the chiller parameters to provide thermostat
cooling, but not provide dehumidification. Turning off dehumidification
saves a very large amount of energy when conditions allow.
Simplified Efficiency & Humidity Example::
The CX34 IPLV EER, at the industry standard chiller loop
temperature of 44F, is around EER 23, exceptionally high when compared
to standard systems. However, when humidity is under the set limit,
there is no need to operate the loop at 44F when at 55F, thermostat
temperature settings can still be maintained, and average efficiency
rises to ~EER 30 or higher. So when indoor humidity is under the
user-defined limit, the Psychrologix™ controller allows the system to
run at a more efficient temperature. In some cases, the loop may be
adjusted as high as 62F producing average EER as high as EER 34. And
likewise, if humidity is particularly high, the system loop may be
dropped as low as 40F to perform hyper-dehumidification. In this manner,
both system efficiency and humidity are dynamically controlled.
Bottom Line - The Chiltrix chiller is the most
energy efficient heating and cooling option you will find, with the
highest IPLV rating in the market, even without the Psychrologix™/DHC.
But with DHC running, efficiency can at times be more than 47% higher
than the IPLV rating.
Note - the Psychrologix™ controller is not a thermostat -
it is a programmable psychrometric chiller controller. Thermostat
settings are still made in the usual way, either set individually at
each room fan coil unit, or in the case of a ducted system, by a
standard central thermostat.
Psychrologix White Paper [click here]