• 제목/요약/키워드: 해수동결 거동

검색결과 5건 처리시간 0.016초

원관내의 해수동결거동에 관한 실험적연구 (An Experimental Study on Sea Water Freezing Behavior in a Cooled Circular Tube)

  • 김명준
    • Journal of Advanced Marine Engineering and Technology
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    • 제22권5호
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    • pp.680-686
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    • 1998
  • In the adoption of a desalination system the most important factor is the cost of fresh water pro-duction. In general LNG is stored in a tank as a liquid state below $-162^{\circ}C$ When it is serviced however the LNG absorbs energy from a heat source and it is transformed to a high pressure gaseous state. During this process a huge amount of cold energy accumulated in cooling LNG is wasted. This wasted cold energycan be utilized to produce fresh water by using a sea water freez-ing desalination system. in order to develop a sea water freezing desalination system and to estab-lish its design technique qualitative and quantitative data regarding the freezing behavior of sea water is required in advance. The goals of this study are to reveal the freezing mechanisms of sea water in a cooled circular tube to measure the freezing rate and to investigate the freezing heat-transfer characteristics. The experimental results provide a general understanding of sea water freezing behavior in a cooled circular tube.

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선박용 제빙장치의 개발을 위한 해수동결거동에 관한 연구 (A study on sea-water freezing behavior for ice maker for fishing boat)

  • 최영규;김정식;김경근;오철
    • 한국마린엔지니어링학회:학술대회논문집
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    • 한국마린엔지니어링학회 2005년도 전기학술대회논문집
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    • pp.233-238
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    • 2005
  • According to change of flow around a circular tube for freezing, measured a variety of salinity of frozen layer. This study was experimentally performed to investigate freezing behavior of sea water along a vertical cooled a circular tube with bubbly flow. The experiments were carried out for a variety of parameter, such as air-bubble method, cooled -tube temperature and air-flow rate. It was found that the experimental parameters gave a great influence on the freezing rate and the salinity of the frozen layer.

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구형용기의 상부면 냉각에 의한 해수 동결거동의 실험적 연구 (An Experimental Study on Sea Water Freezing behavior in a Rectangular vessel Cooled From Above)

  • 최부홍
    • Journal of Advanced Marine Engineering and Technology
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    • 제22권4호
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    • pp.529-537
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    • 1998
  • Currently as due to the rapid development of industry and increase in population we meet serious problems concerning the shortage and pollution of water. In the country many experts predict a shortage of water approaching 450 million tons by the year 2006. To cope with this serious problem it is necessary to construct desalination plants. In the adoption of a desalination system the most important factor is the cost of fresh water production,. In general LNG is stored in a tank as a liquid state below $-162^{\circ}C$. When it is serviced, however the LNG absorbs energy from a heat source and transforms to a high pressure gaseous state. During this process a huge amount of cold energy accumulated in cooling LNG is wasted. This wasted cold energy can be utilized to produce fresh water by using a sea water freezing desalination system. In order to develop a sea water freezing desalination system and to establish its design technique qualitative and quantitative data regarding the freezing behavior of sea water is required in advance, The goals of this study are to reveal the freezing behavior of sea water is required in advance. The goals of this study are to reveal the freezing mechanisms of sea water to measure the freezing rate and to investigate the freezing heat-transfer characteristics,. The experimental results will provide a general understanding of sea water freezing behavior in a rectangular vessel cooled from above.

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구형용기의 하부면 냉각에 의한 해수 동결거동의 기초적 연구 (A Fundamental Study on Sea Water Freezing Behavior in a Rectangular Vessel Cooled from Below)

  • 김명준;길병래;김명환
    • Journal of Advanced Marine Engineering and Technology
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    • 제21권5호
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    • pp.564-570
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    • 1997
  • The most important factor for the desalination system is the fresh water production cost dependent upon the possible energy source which should be obtained easily and with low price. Recently in Korea the demand of LNG, as a cheap and clean energy which does not cause an environmental problem, has sharply been increased. In general, LNG is storaged in a tank as a liquid state below -162 'C. When it is serviced, however, the LNG absorbs energy from a heating source and transforms to the gaseous state with high pressure. During this process a huge amount of cold energy accumulated in LNG is wasted. This waste cold energy can be utilized for producing fresh water from sea water using a sea water freezing desalination system. In order to develop a sea water freezing desalination system and to establish its design technique, a qualitative and quantitative data regarding the freezing behavior of sea water is needed in advance. The goal of this study, therefore, are to reveal the freezing mechanism of sea water, to measure the freezing rate, and to investigate the freezing heat-transfer characteristics. The experimental results help to provide a general understanding of the sea water freezing behavior in a Rectangular vessel cooled from below.

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평행냉각평판을 갖는 구형용기내에서의 해수동결거동에 관한 연구 (An Experimental Study on the Sea Water Freezing Behavior Around Parallel Cooled Plate in the Rectangular Duct)

  • 박대식;박상균;김명환;윤석훈;오철
    • 한국마린엔지니어링학회:학술대회논문집
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    • 한국마린엔지니어링학회 2001년도 춘계학술대회 논문집
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    • pp.249-257
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    • 2001
  • This study was experimentally performed to investigate sea water freezing behavior along parallel cooled plate with bubbly flow. The experiments were carried out for a variety of parameter, such as sea water velocity, air-bubble flow rate, and cooled-plate temperature. The shape of freezing layer, freezing rate and salinity of frozen layer were observed and measured. It was found that the experimental parameters gave a great influence on the freezing rate and the salinity of the frozen layer.

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