With thousands
of applications throughout the world, the APR Control has continually
shown the ability to modify and enhance the performance of standard
air conditioning systems, and to provide inexpensive solutions where
none previously existed. The APR Control has a long history of success
with a wide range of applications and solutions. 50 percent of our sales
are repeat customers.
Below are performance
measurements of The APR in a variety of installations.
System
Load Compliance — Continuous Dehumidification and Temperature Control
Application of
the APR Control for Humidity and Constant Temperature control solutions
is the source of our greatest number of inquiries and the area where
the APR Control offers some of the greatest cost benefits.
Fairbrother Engineering
was looking for an answer to a mold and mildew problem as a result of
high humidity at Sheraton World Resort in Orlando, Florida. The APR
Control was installed on the 9000 BTU PTAC in room 1503. Two humidity
and temperature data loggers were employed, one to track performance
of the PTAC unit with the APR Control in room 1503 and the other in
room 1507 with identical load characteristics, but without the APR Control.
The data was logged for a week and the difference in performance of
the two systems is significant
| Click
on the links to see the performance logs of the tests conducted
at the site. |
Energy Savings
and Extended Equipment Life
The APR Control
modulates system capacity to match changing load conditions, so that
the demands on the refrigeration circuit, particularly the compressor,
are significantly reduced. The Oak Ridge Center for Manufacturing Technologies
has numerous clients in Government and Industry who were looking for
solutions to their continuously escalating energy costs, and their equipment
replacement cycle. The application of an APR-2 on the first on/last
off circuit of the 12.5 ton unit serving their facilities provided the
opportunity to conduct a full energy efficiency evaluation, with results
as high as 19.8% energy efficiency based on the KW usage.
These evaluations
and associated results vary because of equipment variety, capacity ranges
and unique application solutions.
| Click
on the links to see the graphs and reports of the tests conducted
at the site. |
Multiple
Evaporator Zoning with Dehumidifying Zone
The ability of
the APR Control to modulate system capacity can be called upon to provide
control for the use of multiple independently controlled evaporators
with a single speed, single circuit compressor/condenser.
This configuration
can be applied to the application of a dehumidification zone with a
single zone rooftop unit or split system. In Tampa, FL, the representative
for the APR Control applies an independent preconditioning (or dehumidification)
zone on the outside air intake to manage the condition of the outside
air being brought into commercial office, retail and institutional spaces
their engineers are designing. Wherever large ventilation air requirements
are being called for as a result of ASHRAE and local codes, preconditioning
the outside air intake reduces the concerns of humidity buildup and
related mold and mildew damage.
Properly sized
equipment with the APR Control allows the outside air preconditioning
zone to be controlled with a humidistat, while allowing the occupied
space/building load to operate independently on call for sensible cooling
from the space thermostat.
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©2002
Rawal Devices. All rights reserved.
