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ENERGY USE IMPLICATIONS OF METHODS TO MAINTAIN HEAT EXCHANGER COIL CLEANLINESS.

Author(s) : KRAFTHEFER B. C., BONNE U.

Summary

A REVIEW OF INDOOR PARTICULATE CONCENTRATIONS, AIR FLOWS AND FILTER EFFECTIVENESS SHOWED THAT CONSIDERABLE AMOUNTS OF THESE PARTICULATES ACCUMULATE AND BUILD UP BETWEEN THE FINS OF HEAT EXCHANGER COILS, TYPICALLY USED FOR UNITARY AIR CONDITIONERS, AIR-TO-AIR HEAT PUMPS AND CONDENSING FURNACES. FINNED COILS CAN RETAIN PARTICULATES MORE EFFECTIVELY THAN COMMON LINT OR < DUST STOP > FILTERS. THE RETAINED PARTICLES MAY BUILD UP A COATING ON THE COIL FINS AT SUCH A RATE THAT THE PRESSURE DROP DOUBLES IN 4 TO 7 YEARS. AMONG THE FILTERS THE AUTHORS FOUND THAT HIGH EFFICIENCY AIR CLEANERS OF THE ELECTROSTATIC TYPE MOST EFFECTIVELY REDUCED THIS BUILD-UP RATE, BY FACTORS OF UP TO 10, WITH LOW PRESSURE DROP PENALTY. THIS INVOLVED AIR CLEANER PARTICLE RETENTION EFFICIENCIES OF UP TO 95%. BY USING HIGH EFFICIENCY AIR CLEANERS, OPERATING COST SAVINGS RESULT FROM AVOIDED COIL CLEANING COSTS AND REDUCED ENERGY CONSUMPTION OF THE AIR CONDITIONER OR IMATE, INDOOR AIR PARTICULATE CONCENTRATION, FIN SPACING, RELATIVE COIL CAPACITY, FAN OPERATING TIME, FILTER/CLEANER EFFICIENCY AND MAINTENANCE PRACTICES.

Details

  • Original title: ENERGY USE IMPLICATIONS OF METHODS TO MAINTAIN HEAT EXCHANGER COIL CLEANLINESS.
  • Record ID : 1987-0892
  • Languages: English
  • Publication date: 1986
  • Source: Source: ASHRAE Trans.
    vol. 92; n. 1B; 420-431; 11 fig.; 1 tabl.; 22 ref.; discuss.; append.
  • Document available for consultation in the library of the IIR headquarters only.

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