Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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USING LOW-VOLTAGE-HIGH-FREQUENCY ELECTRIC FIELD TO MITIGATE MINERAL FOULING IN A HEAT EXCHANGER

  • Tijing, Leonard D. (Division of Mechanical and Aerospace System Engineering, Automobile Hi-Technology Research Center, Engineering Research Institute, Chonbuk National University) ;
  • Pak, Bock-Choon (Division of Mechanical and Aerospace System Engineering, Automobile Hi-Technology Research Center, Engineering Research Institute, Chonbuk National University) ;
  • Baek, Byung-Joon (Division of Mechanical and Aerospace System Engineering, Automobile Hi-Technology Research Center, Engineering Research Institute, Chonbuk National University) ;
  • Lee, Dong-Hwan (Division of Mechanical and Aerospace System Engineering, Automobile Hi-Technology Research Center, Engineering Research Institute, Chonbuk National University) ;
  • Cho, Young-I. (Department of Mechanical Engineering and Mechanics, Drexel University)
  • Published : 2007.05.30
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Abstract

This paper presents an investigative study on the efficacy of a new physical water treatment (PWT) technology using an oscillating electric field to mitigate mineral fouling in heat exchangers. Parallel graphite electrode plates immersed in water were used to generate the electric field directly in water. Artificial hard water at 500 ppm hardness was used in all fouling tests. The inlet temperatures were maintained at 23.5${\pm}$0.5$^{\circ}C$ and 85${\pm}$0.5$^{\circ}C$ for cold and hot water sides, respectively. The results at a cold water-side velocity of 0.3 m/s showed a 16-60% drop in fouling resistances from the baseline test depending on the frequency of the electric field for the PWT-treated cases.

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