Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Eco-friendly Self-cooling System of Porous Onggi Ceramic Plate by Evaporation of Absorbed Water

  • Katsuki, Hiroaki (Ceramicware Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Choi, Eun-Kyong (Ceramicware Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Lee, Won-Jun (Ceramicware Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Ung-Soo (Ceramicware Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Hwang, Kwang-Taek (Ceramicware Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Cho, Woo-Seok (Ceramicware Center, Korea Institute of Ceramic Engineering and Technology)
  • Received : 2018.01.15
  • Accepted : 2018.02.22
  • Published : 2018.03.31
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Abstract

Porous ceramic plates were prepared from Onggi clay and bamboo charcoal powder at 1100 and $1200^{\circ}C$ and their porous properties and water absorption, and the cooling effect of porous plates, were investigated to produce eco-friendly porous ceramics for a self-cooling system that relies on the evaporation of absorbed water. Porous properties were dependent on the particle size of charcoal powder pore forming additive and the firing temperature; properties were also found to be dependent on the total pore volume, average pore size and porosity, which had values of $0.103-0.243cm^3/g$, 0.81 - 2.56 mm and 20.9 - 38.2%, respectively, at $1100^{\circ}C$ and $0.04-0.18cm^3/g$, 0.33 - 2.03 mm and 10.8 - 30.9%, respectively, at $1200^{\circ}C$. Cooling temperature difference of flowing air parallel to surface of porous ceramic plates fired with two kinds of charcoal powder at $1100^{\circ}C$ was $3.5-3.6^{\circ}C$ at $26^{\circ}C$ and 60% of relative humidity in a closed box. Cooling temperature difference was dependent on the number of porous plates and the distance between porous plates. A simple and eco-friendly cooling system using porous ceramic plates fired from Onggi clay and charcoal powder was proposed.

Keywords

References

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