New Biofouling Control Program for Open Recirculating Cooling Water System with Refrigerator/Chiller to Reduce Operating and Maintenance Costs of the System.

摘要

Various biofouling control chemicals have been commonly applied to open recirculating cooling water systems with refrigerators and/or chillers at industrial factories and buildings to keep system performance at higher level and to reduce the risk of waterborne deceases such as Legionnaire's disease. The biofouling control chemicals can be classified to two types of oxidizing and non-oxidizing, but deterioration of chemicals' performance can't be evitable due to active ingredients' decomposition and/or adsorption to other substances. New biofouling control program has been developed which consists of three technologies, the advanced stabilized oxidizing biocide, regeneration of active ingredients, and efficiency monitoring for refrigerator/chiller. Because the new program has the superior performance to suppress the biofouling in the whole system including refrigerator, chiller, recirculating lines and cooling tower, the increase of electricity consumption can be depressed and the time interval of system cleaning can be prolonged. Field applications show the improvement of energy efficiency of the refrigerators/chillers up to 10% compared to the previous chemicals treatments. One case at an electric industry factory shows 9% of energy efficiency improvement that can be estimated to the decrease of CO2 emission of 1,9001.