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Conditions of Desalination with Reduced Pressure Evaporation Device

감압증발장치와 해수담수화의 조건

  • Ji, Ho (Korea Research Institute of Ships & Ocean Engineering) ;
  • Yun, Sung Yeol (Korea Research Institute of Ships & Ocean Engineering) ;
  • Lee, Seung Won (Korea Research Institute of Ships & Ocean Engineering) ;
  • Moon, Deok Soo (Korea Research Institute of Ships & Ocean Engineering) ;
  • Lee, Ho Saeng (Korea Research Institute of Ships & Ocean Engineering) ;
  • Kim, Hyeon Ju (Korea Research Institute of Ships & Ocean Engineering)
  • Received : 2013.09.30
  • Accepted : 2014.02.19
  • Published : 2014.02.25

Abstract

Reduced pressure evaporation applies the principle of lowering water's boiling point by reducing the pressure. It uses the relation between temperature and pressure to reduce energy consumption needed for elevating temperature. As the result, the highest evaporation was observed at $80^{\circ}C$ and -40 cmHg applying saturated vapor pressure depending on different seawater temperature. It was found that the higher concentration in the factor test experiment depending on seawater concentration induced the higher evaporation. Also, in the factor test experiment, the amount of evaporation increased as the pressure decreased. It is concluded that the most important factor of evaporation was concentration, the second important factor was temperature, and the least important factor was pressure. Through this experiment, optimized conditions of desalination with reduced pressure evaporation device were verified.

감압증발장치는 압력을 감소시켜 물의 끓는점을 낮춰주는 원리를 이용한 것으로 온도를 높이는데 필요한 에너지 소모량을 줄일 수 있는 원리로 사용되고 있다. 즉, 온도와 압력의 상관관계 원리를 이용한 것이다. 감압증발장치를 이용하여 해수의 온도별 포화증기압을 적용하여 증발량 실험을 한 결과 $80^{\circ}C$, -40 cmHg의 경우가 가장 많은 증발량을 나타내었으며, 해수의 농도에 따른 인자 실험의 결과에서는 농도가 짙을수록 증발량이 많이 발생하는 것을 알 수 있었다. 또한 압력에 따른 인자 실험의 결과 낮은 압력에서 증발량이 증가하는 것을 알 수 있었다. 결과적으로 증발량의 중요인자는 농도가 큰 부분으로 작용하였으며 다음 요인은 온도로 나타났으며 마지막 요인으로 압력을 들 수 있었다. 본 실험을 통하여 감압증발장치를 이용한 담수화 조건을 확인 할 수 있었다.

Keywords

References

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Cited by

  1. Production of High Hardness Concentrated Seawater Using NF Membrane vol.17, pp.4, 2014, https://doi.org/10.7846/JKOSMEE.2014.17.4.333