AHU Coil Cleaning

AHU Coil Cleaning

AHU AND AIRCONDITIONING COIL FINS CLEANING 
ABS FINCARE / ABS 707
is a unique blend of surfactants and cleaning agents used primarily for the cleaning of AHUs, FCUs and Radiators Fins cleaning. This Non-acid coil cleaner is Bio-degradable and is safe to use. The special foaming action brings the dirt from inside to outside. This can be diluted up to 5 parts with water depending on the dirt levels in the AHU/FCU and Radiators Fins
POTENTIAL PROBLEMS AND SOLUTIONS
PROBLEM # 1   High Pressure Drop
When the pressure drop is high between the return and the supply air, the AIR FILTERS needs cleaning or replacement.

PROBLEM # 2   Low flow rate of supply air.
When the flow rate of supply air is low, the AIR FILTERS need cleaning or replacement.
CLEANING OF AIR FILTER:  Air Filter should be cleaned with warm water or detergent at least once a week.
PROBLEM # 3   CLEANING OF FINS: This should be cleaned with FIN CLEAN
In spite of the air filter, the surface of aluminum fin coils tend to get contaminated by airborne foreign particles/substances or oxidized due to humid environment inside the casing. Both contamination and oxidation film becomes an insulation barrier which hinders the heat transfer between the air and refrigerant in the coils.
Low temperature Drop.

 
HOW TO EVALUATE THE EFFECT OF FIN COIL CLEANING
  1. Measuring the supply air flow rate before and after cleaning.
  2. Measuring the temperature of refrigerant return and supply air.
  3. Measuring the supply air temperatures before and after cleaning.
BENEFITS OF CLEANING AC COILS
  1. ENERGY SAVING_ Experience tells about 30% of electric power can be saved after cleaning dirty coils. (0.25 mm thick insulation layer).
  2. Assures proper operating of the system.
  3. Avoids sudden shut down of the systems. Dirty coils leads to mechanical damage to motors/blowers/compressors due to the heavy load.
  4. Clean systems provide pleasant working environment at reduced electrical cost. Avoids ‘SICK BUILDING SYNDROME’. The dirty coils are the nests of germs, which over a period of time lead to diseases to people breathing and exposed to the polluted air through the air conditioner
 
WHY CLEAN AIRCONDITIONING COILS
A clean air-conditioning unit uses less electricity. An energy survey, based on Northern New Jersey 1982 electric rates, shows a cost of $540.00 per season for operating a simple 3-ton unit with a clean condenser coil, versus $756.00 if the coil is dirty. A savings of $216.00. For a 60-ton unit, it costs $ 11,368 to operate on dirty coils and $ 8120 if it’s clean, a savings of $3248.00. With the spiraling cost of energy, you can’t afford not to clean your air-conditioning coils regularly.
 
Secondly, more air conditioners fail because they are running with dirty coils than because of mechanical problems. Dirty coils can cause head pressure to be 10% - 20% higher, thereby increasing unnecessary wear on motors, compressors, capacitors, switches, etc. Dirt and corrosion reduce the efficiency of the units, which causes it to run too frequently. An air conditioning  coil is designed to transfer heat. Dirt and corrosion on a coil act as an insulator that interferes with heat transfer.

Thirdly, coil cleaning eliminates downtime. Regular cleaning reduces breakdowns. Units can be cleaned in-place, without DISASSEMBLY - which means additional savings.

 
TYPICAL ELECTRICAL COSTS TO OPERATE AIR COOLED AIRCONDITIONERS
S.No Unit size Tons Dirty coils $ amount Clean coil $ amount Savings $ amount
1 3 tons 756 540 216
2 5 tons 1134 810 324
3 10tons 2142 1530 612
4 20tons 3976 2840 1134
5 40tons 7798 5570 2228
6 60tons 11368 8120 3248
 

ADVANTAGES OF FIN CLEAN OVER CAUSTIC SODA
S.No CAUSTIC SODA FINCARE
1 HIGHLY CAUSTIC AND EATS INTO METAL SURFACES CONTAINS RETARDANTS WHICH WILL NOT ALLOW COROSSION OF METAL.
2 HIGHLY COROSSIVE AND DANGEROUS TO USE EASY TO HANDLE
3 PUNGENT SMELL MAKES USAGE DIFFICULT NO PUNGENT SMELL, INFACT LETS OUT A NICE DOUR.
4 NECESSARY TO USE OUTDOORS. CAN BE USED INDOORS
5 NON-BIODEGRADABLE DEGRADALBE
6 NO HEAVY FOAMING RESULTING IN MULTI APPLICATION. HIGH FOAMING ENSURES CLEANING FROM INSIDE TO OUTSIDE.