An Evaluation of a super-absorbent polymer as the Nucleating Agent for a Capsule-type Ice Storage System

고흡수성고분자가 조핵제로 첨가된 빙축열용 축열재 개발

  • Choi, Hyung-Joon (Division of Chemical Engineering, Korea Institute of Science and Technology) ;
  • Hong, Seong-Ahn (Division of Chemical Engineering, Korea Institute of Science and Technology) ;
  • Park, Won-Hoon (Division of Chemical Engineering, Korea Institute of Science and Technology)
  • 최형준 (한국과학기술연구원, 에너지공정연구실) ;
  • 홍성안 (한국과학기술연구원, 에너지공정연구실) ;
  • 박원훈 (한국과학기술연구원, 에너지공정연구실)
  • Published : 1990.09.25

Abstract

A study was conducted to investigate the feasibility of using a super-absorbent polymer made from a acrylic acid copolymer for a capsule-type ice storage system. In a simple pyrex-tube test, 25% of distilled water samples tested turned out not be frozen at all at $-12^{\circ}C$ and the average supercooling of the samples frozen was $9.8^{\circ}C$. With the addition of 0.5wt% super-absorbent polymer, however, the supercooling of the distilled water was dramatically reduced and more than 35% of samples tested did not show any supercooling. The heat transfer characteristics of a capsule-type ice storage unit was also investigated with a distilled water as the phase-change material. With the addition of 0.5wt% polymer, the supercooling of water was not observed at all and thus an overall heat transfer was enhanced. Based on these results, it was concluded that a super-absorbent polymer is a potential candidate as the nucleating agent for an ice-storage system.

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