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Corrosion Inhibitors

AircoFridge Optimizer has corrosion inhibitors to protect precision compressor components. It is not uncommon to have corrosive acids in refrigeration systems. Acids can be generated by water contamination, or by the oil oxidation process itself. As mentioned previously, AircoFridge Optimizer’s contact activated anti-wear additive forms a protective barrier on all metal surfaces. This barrier resists acid and protects the metal from corrosion damage because the additive-to-metal bonds are not easily broken.

The corrosion resistance can be illustrated by timing how long this barrier survives while submerged in laboratory grade hydrochloric acid. Because aluminum corrodes rapidly in HCI, aluminum foil was used as the carrier (or coupon) for testing the corrosion resistance of ordinary refrigeration oil, and the same oil with 5% AFO added. The length of time it takes to corrode the aluminum coupon is a measure of the oil’s corrosion resistance. It was found that the coupon treated with AFO resisted the hydrochloric acid almost three times longer than the coupon coated with straight refrigeration oil.

Seal Conditioners

AircoFridge Optimizer contains conditioners. These conditioners maintain elastomer resiliency and pliability. Elastomer components of mechanical seals, valve packings, case gaskets, hoses, and pressure relief valves are treated to a conditioning additive that keeps them from cracking. Because elastomer in units treated with AFO become more resilient and durable, the life of these components is extended.

Surfactant Agents

AircoFridge Optimizer uses surfactant agents to reduce foaming, and to minimize residual oil film thickness. It is desirable to reduce foaming in compressors because the gas trapped in foam bubbles is a poor lubricant. Minimizing oil foam in the compressor is important to insure proper lubrication.

Foaming also causes problems in evaporator coils. After the liquid refrigerant and refrigeration oil mixture pass through the expansion valve, the refrigerant absorbs heat and vaporizes. Because the refrigerant and the oil are miscible and well mixed, when the refrigerant vaporizes, it does so in small pockets or bubbles. Consequently, a significant amount of foaming occurs as the refrigerant vaporizes while passing through the evaporator. This foaming action can be seen by taking a refrigeration oil sample that is laden with refrigerant.

Reducing foam in the evaporator coil is important because foam slows the heat transfer process. Comparing oil foam to a Styrofoam coffee cup is a good analogy. In one case, the foam is trapped in a liquid, and in another case, it is a trapped gas in a solid. As you know, it takes surprisingly little Styrofoam to keep the heat of scalding coffee from your hands. Because the oil foam acts as an insulator, the amount of heat transfer (cooling) in the evaporator is restricted. Therefore, reducing oil foaming in the evaporator coil increases the coil’s heat transfer efficiency, which, in turn, increases the refrigeration or air conditioner unit’s cooling capacity. AircoFridge Optimizer’s anti-foam additive reduces foaming and increases the cooling capacity. Controlled laboratory test found that the temperatures of the airflow exiting the evaporator coil dropped 2˚F after AircoFridge Optimizer was added. This increase cooling efficiency results in energy savings because the compressor operates fewer hours, for the same amount of cooling. The overall maintenance cost is also reduced because the unit is subjected to less wear and tear.

The surfactant agent that reduces oil foam also reduces refrigeration oil film thickness that accumulates inside condenser and evaporator coils. Because this oil film acts as an insulator in both coils, heat transfer is impaired. While a reduction in oil film build-up has been verified, it is difficult to precisely quantify the reduction since direct measurement is impractical. It has been AircoFridge Optimizer’s experience that when larger units are treated with the supplement, the amount of oil removed to prevent over filling can exceed the amount added, indicated the film thickness on all internal surfaces decreased. This conclusion is consistent with the observed improvement in heat transfer when AFO is used.

Oxidation Inhibitor

AircoFridge Optimizer contains an oxidation inhibitor to preserve the oil. All lubrication oils oxidize or deteriorate over time. As oils degenerate, corrosive organic acids and sludge are formed, which can damage the precision compressor components and interfere with the proper distribution of the lubricant. AircoFridge Optimizer’s oxidation inhibitor chemically interacts with and disrupts the oil oxidation process thus allowing the refrigeration oil to perform at peak levels longer. The resulting extended refrigeration oil life translates to less frequent oil changes and longer equipment life.

AircoFridge Optimizer Features & Benefits

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FEATURES BENEFITS
Increased heat transfer in the evaporator

and condenser up to 25%

Improved cooling with shorter cycle

times, equating to less run time and

energy used

Reduction of friction Lower amp draw and reduced start amps
Reduced noise and vibration Comfort of the mechanical rooms
Lower operating temperatures of the oil

and the compressor

For every 10 degrees Celsius a motor

runs hotter, it reduces its life by 50%

Improved energy efficiency Payback time realized in months and

then all further savings go towards the

bottomline.