Blue vs. Gold Fin Technology of Fin Types in HVAC Coils

As you know, the condenser coil and the evaporator in heat exchangers play a very important role in the refrigeration cycle. In order to increase the heat transfer rate from the surface of the condenser coil, thin ribs called fins are installed at certain intervals on the surface of the coil.

On the other hand, coils and fins are always exposed to adverse weather conditions; especially when the atmospheric conditions of the desired environment are humid (cities such as Rasht, Ramsar, Zahedan, Chabahar, Bandar Abbas, Abadan, Ahvaz, Kish, Dubai, Sharjah, Basra, Baghdad, Damascus, Beirut, Doha, Muscat, Kuwait, etc.). ) and with acids and salts (found in rainwater); in this case, the coils and fins of the condenser will be damaged, causing irreparable financial damage as well as reducing the efficiency of the system in the long run.

One of the effective methods of preventing corrosion and erosion of coils and fins in the evaporator and condenser of air conditioning systems in the above areas is to use Blue Fin and Gold Fin technology in them, which is discussed in this article. Please stay with us.

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What is Blue Fin?

Bluefin in the condenser coil and evaporator of air conditioning equipment such as air conditioners and Split AC units, Ducted Split, Fan Coil Units, etc. is an epoxy resin coating that is highly resistant to moisture, chemical environments and solvents. Blue Fin is, as the name suggests, blue.

Bluefin coating is often used in acidic environments (containing acid vapours in industrial environments) and with high humidity (such as the southern and northern cities of Iran or other cities whose names have been mentioned) to prevent coils from rusting and corrosion. And the fins of the condenser and evaporator prevented it.

The Bluefin resin coating has a very low surface tension; therefore, it prevents the accumulation of water droplets caused by the distillation of air moisture at its dew point on the surface of the evaporator coil and also prevents rusting and erosion of the evaporator.

What is Gold Fin?

Goldfin is a nano-gold plated coil surface. The function of Goldfin is very similar to Bluefin and it is used in environments that have corrosive and erosive conditions such as humidity and water droplets, salts and acid vapours; with the difference that the Goldfin coating is also responsible in the reverse cycle, so when the heating capability of the system is used in addition to the cooling capability, the Goldfin coating is installed.

The Goldfin coating has a higher heat exchange rate than Bluefin and this increases the efficiency of the unit in its heating system by increasing the heat exchange rate in the condenser coil.

Goldfin is used less due to its relatively high price. Therefore, bluefin is used more. However, if both the heating and cooling capabilities of the system are being used, the Goldfin coating must be used on the unit's coil.

What are the advantages of using a blue fin and a gold fin?

The advantages of the use of the Bluefin and Goldfin technology can be listed as follows:

Prevention of corrosion and rusting of coils and fins due to lack of moisture penetration
No reaction with acidic atmospheric salts and prevention of coil and fin corrosion
No accumulation of droplets caused by water distillation on the coil in the evaporator
Flexible and impact resistant
Dust penetration prevented
Increases the life of the unit's condenser coil and evaporator

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In this article, we have tried to talk about the Bluefin and Goldfin technology and its application in air conditioning units; we hope that the material presented in this article has been useful to you.

To view and compare different types of air conditioning units of different brands and capacities, as well as to know the updated price of the products, refer to the DamaTajhiz Website (the first and most reliable specialized collection in the field of building facilities equipment and all air conditioning units since 1383 and having 3 valid business licenses); For more information, call during office hours +98 21 88822550 and get advice from the air conditioning unit experts of DamaTajhiz HVAC Group.

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