Resumes
Resumes
Fred Bigham Phones & Addresses
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4206 11Th Ave, Portland, OR 97202 (503) 234-4780
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Salt Lake City, UT
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Montgomery, TX
Work
Position:
Professional/Technical
Education
Degree:
Graduate or professional degree
Publications
Us Patents
Controlled Biocide Feeder For Cooling Water Systems
View pageUS Patent:
53398890, Aug 23, 1994
Filed:
Aug 19, 1992
Appl. No.:
7/933356
Inventors:
Fred L. Bigham - Portland OR
International Classification:
E03B 1100
US Classification:
165 1
Abstract:
In accordance with the present invention, a controlled biocide feeder limits growth of bacteria (e. g. , Legionella pneumophila) in heat transfer water of building air conditioning systems. Preferably, a flow of heat transfer water is directed across a solid biocidal material, such as 1-Bromo-3-chloro-5, 5-dimethylhydantoin (BCDMH) to form a biocidal solution. A biocide control valve responsive to a heat transfer control signal corresponding to an amount of water used in the heat transfer system for passing biocidal solution to the water used in the heat transfer system to provide a biocidal material concentration of less than 12 parts-per-million to prevent corrosion of the air conditioning system. Preferably, the concentration is between about 1. 5 and 3 parts-per-million of BCDMH.