| Introduction
Studies
supported by ASHRAE and statements of a major chiller OEM indicate that
oil in refrigerant reduces heat transfer and therefore efficiency. Oil
content of 1% (by weight) produces a reduction of 3% efficiency and
up to 15% produces a reduction of 40-50% in efficiency. The reduction
in efficiency tends to be consistent for different refrigerants.
OAM
Purger effectively removes oil from refrigerant by means of distillation. Purified
refrigerant is returned to the refrigerant path while oil is returned
to the oil sump. At the same time acid and moisture are removed by filter
and dryer.
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Technology
The OAM
Purger is designed to remove oil, acids and moisture from a Centrifugal Chiller・s
refrigerant. However, its main purpose is to remove oil from the refrigerant
and return it to the Chiller・s lubrication circuit (oil sump) where
it belongs. Initial oil stripping is accomplished in two phases. The
first phase, or initial oil stripping process, occurs at initial start-up
of the OAM
Purger.
This is when all the excess oil that has been added to the system over
time is removed and discarded. Often times the initial stripping process
can yield several gallons to multiple tens of gallons depending on how
severely the refrigerant is saturated with oil.
The second phase begins when all excess oil has been removed from the
refrigerant. The OAM
Purger will, from that point on, maintain the system in lubrication balance.
Lubrication balance meaning virtually 100 percent of the compressor・s
lubricating oil is kept in the oil sump where it belongs.
Operation of the OAM
Purger is accomplished by a ：Patented； process utilizing gravity, heat and
pressure in conjunction with special high capacity desiccants to completely
remove oil, acids and moisture from a Chiller・s refrigerant charge.
The OAM
Purger works by repeatedly extracting 10 to 20 pounds (depending upon the refrigerant
level available in the chiller evaporator) of oil-contaminated refrigerant
for processing from the Chiller each purge cycle. The oil -contaminated
refrigerant is heated by means of a flexible band electric heater and
the liquid refrigerant is vaporized off. As the refrigerant vaporizes
it passes through the special E-Z Change ：High Capacity； Moisture/Acid
filter-drier where it is cleaned before returning to the Chiller evaporator.
At the end of the distillation phase any distilled oil is automatically
returned to the Chiller・s oil sump through an in-line ：High Acid Capacity；
filter-drier where any residual acids are removed.
The OAM
Purger is able to process between 850 and 1250 pounds of refrigerant per week.
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Special
Features & Benefits
- Restores
chillers to peak operating capacity
- Continuously
purify, dehydrate and filter refrigerant
- Easy
to install (220VAC and only three 1/4" connections to existing
chiller ports)
- Utilizes
EZ Change Quick connect refrigerant filter (can be changed while system
is operating)
- Operates
24 hours a day whether chiller is on or off
- There
are no mechanical or ejector pumps. The OAM
Purger uses only gravity, heat and pressure differential to work
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