How is an Air Conditioners size determined?
In accordance with Industry standards, dependent on geographic location, most
Air Conditioning units are sized to extreme load conditions. Items considered
are worst-case outdoor conditions, maximum internal heat loading, with a margin
of safety added on. This result is then applied to the closest next size larger
available air conditioning unit that is most often chosen for installation.
Therefore, except when conditions require maximum output, the majority of its
hours of operation are spent operating with excess capacity; oversized for the
duty it is performing, while wasting energy.
How does the A/C PowerMizer adjust this overcapacity?
The A/C PowerMizer turns the compressor off (largest electrical load) when its
program senses overcapacity. (Saturated air unable to accept further cooling).
The air handler fan continues the cooling circulation. Upon sensing the calculated
point that will maintain uninterrupted cooling the compressor is re introduced,
thereby adjusting the output of the Air Conditioner to meet the demands of
existing conditions and the set point of the thermostat, therein re-sizing the
unit to meet demand. The result is a savings of energy without sacrificing comfort.
Why doesn’t the thermostat do the same job?
The thermostat maintains a temperature at which it is located, within certain
tolerances, and cannot regulate the cooling applied to the area serviced by the
Air Conditioner.
The oversized Air Conditioning system can quickly satisfy the thermostat set point.
By rapidly satisfying the set point the system overshoots the set point.
Thermostat design set point allows for overshoot prior to switching the unit off.
In many cases the short run time does not allow for proper dehumidification.
The A/C PowerMizer modulates the output of the Air Conditioner in accordance
with the demands of the area cooled so the overshoot of the thermostat set point
is minimal while maintaining a more energy efficient cooling period.
Where does the A/C PowerMizer work?
The A/C PowerMizer is compatible with most residential and light
commercial units. e.g. packaged direct expansion (DX), split systems, PTAC units
utilizing a single thermostat or sensor.
I like the theory; tell me more.
The thermodynamic efficiency of the cooling cycle is improved by cycling the
compressor. Compressors run most efficiently when fully loaded. In a static
condition the refrigerant gas is at its highest density. Upon startup the
compressor is fully loaded and the first minutes are the most efficient due
to the higher evaporator coil temperatures accelerating the heat of vaporization
process, resulting in a lower specific volume. This denser gas results in a higher
compressor volumetric efficiency and a higher system Coefficient of Performance (COP).
I like the ease of understanding, tell me more
With the A/C PowerMizer the supply air temperature is held to a closer
tolerance with a resultant lower loss of cooling due to heat transfer to the
surroundings. An additional gain is there is less coolness remaining in the coil
and ducting that is lost at the end of the cooling cycle.
This is all accomplished with a simple to install, failsafe electronic device
with one sensor.
To sum up:
Compatible with all split system Air Conditioners with single thermostat.
Modulates the output of the compressor to the immediate heat load of the space being cooled, not
just at the location of the thermostat.
Less overshoot of the thermostat set point.
Improved thermodynamic efficiency through proper loading of the compressor.
Less coolness remaining in the coil and ducting after thermostat reaches set point.
Non-system intrusive installation. (No down time)
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