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首页> 外文期刊>農業気象 >Solar-Energy-Driven Upward Water Flow and Evaporation from a Water Table Through a Porous Material in a Cylindrical Conduit
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Solar-Energy-Driven Upward Water Flow and Evaporation from a Water Table Through a Porous Material in a Cylindrical Conduit

机译：太阳能驱动的向上水流和通过圆柱形管道中的多孔材料从地下水位蒸发

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摘要

"Solar Pump" is a new concept of solar still where water is distilled as well as transported by solar energy. In the water reservoir, a column of porous material is immersed, which absorbs and transmits water. Water thus transported along the water potential gradient evaporates at the end of the column where the solar radiation is absorbed. It is then recovered with a condensing cover. To examine the feasibility of this concept, Simultaneous transportation of heat and moisture through the sand column from varying depths of water table under constant irradiance was examined. A mathematical model, based on Philip and de Vries (1957), predicted that the rate of evaporation from a uniform sand column is maximum when the water table is 0.1 in deep. This is because the water potential decreases with height front the water table, whereas the temperature increases with height. Experimental results partially supported such a prediction. The results also Suggested that the evaporation rates from the surface of the sand column were slightly higher than that from the water table. Thus, the proposed method could be useful if a proper porous material is selected.
机译：“太阳能泵”是太阳能蒸馏器的新概念，在蒸馏器中蒸馏水并通过太阳能进行运输。在储水槽中，浸入一列多孔材料，该材料吸收并传输水。因此，沿着水势梯度传输的水在吸收太阳辐射的柱子末端蒸发。然后用冷凝盖将其回收。为了检验该概念的可行性，研究了在恒定辐照度下，热量和水分从不同深度的地下水位通过砂柱的同时传输。基于Philip和de Vries（1957）的数学模型预测，当地下水位深为0.1时，均匀砂柱的蒸发速率最大。这是因为水位随着水位高度的增加而降低，而温度随着高度的升高而增加。实验结果部分支持了这种预测。结果还表明，砂柱表面的蒸发速率略高于地下水位的蒸发速率。因此，如果选择合适的多孔材料，则所提出的方法可能是有用的。

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