Biofouling Control in Heat Exchangers Using High Voltage Capacitance-Based Technology

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July 2007

Abstract:
…Four dif­fer­ent appli­ca­tion case stud­ies are pre­sent­ed in this paper in which High Voltage Capacitance Based (HVCB) tech­nol­o­gy was used to con­trol bio­foul­ing. The appli­ca­tions include an evap­o­ra­tive cool­ing wall in a green­house in Oracle, Arizona; a cool­ing tower–condenser appli­ca­tion in Phoenix, Arizona (study per­formed by Arizona State University under a U.S. Department of Energy grant); a cool­ing tow­er sys­tem using reclaimed indus­tri­al waste water at a wafer facil­i­ty in Camas, WA; and a pip­ing sys­tem for a major util­i­ty plant (Tennessee Valley Authority – TVA) using riv­er water.

All four loca­tions showed a sig­nif­i­cant improve­ment in bio­foul­ing con­trol when the HVCB sys­tem was applied. Depending on the con­di­tions of the water at each loca­tion, bio­foul­ing was con­trolled, while achiev­ing a com­plete elim­i­na­tion of bio­cides, or with a sig­nif­i­cant reduc­tion in bio­cide feed.

From the data pre­sent­ed, the appli­ca­tion of HVCB treat­ment pro­grams can be suc­cess­ful in inter­fer­ing with the three rec­og­nized stages of biofilm for­ma­tion in indus­tri­al heat exchang­ers and pip­ing sys­tems.

Click here to link to the full tech­ni­cal paper