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논문 기본 정보

자료유형
학술저널
저자정보
김형권 (국립원예특작과학원) 김승희 (국립원예특작과학원) 권진경 (국립원예특작과학원)
저널정보
(사)한국생물환경조절학회 시설원예·식물공장 시설원예·식물공장 제25권 제4호
발행연도
2016.12
수록면
270 - 276 (7page)

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This study analysed overall heat transfer coefficient, heat transmission, and rate of indoor air heating provided by water curtain in order to determine the heat transfer characteristic of double-layered greenhouse equipped with a water curtain system. The air temperatures between the inner and outer layers were determined by the water flow rate and inlet water temperature. Higher water flow rate and inlet water temperature resulted in the increased overall heat transfer coefficient between indoor greenhouse air and water curtain. However, it was found that with higher levels of water flow rate and inlet water temperature, indoor overall heat transfer coefficient was converged about 10W·m<SUP>-2</SUP>·℃<SUP>-1</SUP>. The low correlation of overall heat transfer coefficient between water curtain and air within double layers was likely because the combination of greenhouse shape, wind speed and outdoor air temperature as well as water curtain affected the heat transfer characteristics. As water flow rate and inlet water temperature increased, the heat transferred into the greenhouse by water curtain also tend to rise. However it was demonstrated that the rate of heat transmission from water curtain into greenhouse with water curtain system using underground water was accounted for 22% to 28% for total heat lost by water curtain. The results of this study which quantify heat transfer coefficient and net heat transfer from water curtain may be a good reference for economical design of water curtain system.

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UCI(KEPA) : I410-ECN-0101-2017-520-001978909