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Development of Seawater Distiller utilizing Waste Heat of Portable Electric Generators

발전기 폐열 이용 소형 해수담수화장치 개발

  • Park, Chang-Dae (Environmental and Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Lim, Byung-Ju (Environmental and Energy Systems Research Division, Korea Institute of Machinery and Materials) ;
  • Hiroshi, Tanaka (Dept. of Mechanical Engineering, Kurume Nat’l College of Tech.)
  • 박창대 (한국기계연구원 그린환경에너지기계연구본부) ;
  • 임병주 (한국기계연구원 그린환경에너지기계연구본부) ;
  • Received : 2009.12.28
  • Accepted : 2010.04.06
  • Published : 2010.06.01

Abstract

A seawater distiller, in which the waste heat from a portable electric generator was used, with a multiple-effect diffusion still was designed. The waste gas from small generators commonly used in islands has not yet been used because it has less thermal energy; however, this waste gas can be used as a heat source for small-capacity distillers and as an additional heat source for solar stills. The proposed distiller comprises a series of closely spaced parallel partitions that are placed in contact with saline-soaked wicks. In the distiller, evaporation and condensation processes are repeated to recycle the thermal energy for increasing the distillate productivity. Experimental results show that the proposed distiller with only one-effect still can produce at least 6.7 kg/day of distilled water; the proposed distiller with a ten-effect still is expected to produce 43 kg/day of distilled water. This amount of distillate is approximately four times the maximum daily productivity of the solar stills, as determined in outdoor experiments.

도서지역에서 많이 사용하고 있는 소형 발전기의 폐열을 열원으로 이용하는 소용량 자급형 해수담수화장치의 설계 자료와 성능실험 결과를 제시하였다. 제안된 담수기는 조밀간격 수직형 평행평판이 복수단으로 구성된 다중효용방식으로서, 해수가 흐르는 윅(wick)이 부착되어 있다. 복수단의 평판에서 증발과 응축과정이 반복적으로 일어나므로 열에너지를 재이용하게 되어 담수생산량을 증가시킨다. 제안된 담수기의 성능실험 결과 5.6 kVA 발전기의 폐열이 담수화의 증발열원으로 사용될 수 있음을 알 수 있었고, 1중 효용만으로 최소 6.7 kg/day의 담수를 생산할 수 있었다. 이 결과는 10중 효용의 경우 약 35~44 kg/day를 기대할 수 있는 양으로서, 동일 전열면적의 태양열 증류기의 일일 최대 생산량보다 약 16~4배 많은 것이다.

Keywords

References

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Cited by

  1. Study on Prediction of Performance with Design Variables of Solar-Assisted Still Using Waste Heat from Diesel Generator vol.37, pp.12, 2013, https://doi.org/10.3795/KSME-B.2013.37.12.1061
  2. Design and Evaluation of Portable Forward Osmosis Desalination Device vol.37, pp.3, 2013, https://doi.org/10.3795/KSME-B.2013.37.3.301
  3. Performance and Availability of Seawater Distiller with Heat Pipe Utilizing Low-Grade Waste Heat vol.37, pp.1, 2013, https://doi.org/10.3795/KSME-B.2013.37.1.081