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Effect of wind speed on active and passive solar stills

机译：风速对主动和被动太阳静止图像的影响

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The effect of wind speed V on the daily productivity P_d of some active and passive solar stills is studied by computer simulation. Numerical calculations have been carried out on typical summer and winter days in Tanta in order to correlate P_d with V for different masses of basin water m_w for the passive stills and various thicknesses d_w or mass flow rates m_w of the flowing brine for the active stills. It is found that for the active and multi-effect passive stills, P_d increases with the increase of V up to a typical velocity V_t beyond which the increase in P_d becomes insignificant. However, for all the investigated single effect passive stills, there is a critical mass (depth) of basin water beyond which P_d increases as V increases until V_t. For basin water masses less than the critical mass, P_d is found to decrease with increasing V until V_t. After V_t, the change in P_d is unimportant in a similar behavior to that obtained for the active and multi-effect passive stills. The critical mass (depth) of basin water for the investigated single effect passive stills is found to be 45 kg (4.5 cm). Moreover, the typical velocity V_t is independent on the still shape and the mode of operation (active or passive) but it shows some seasonal dependence. For the investigated stills, V_t is found to be 10 and 8 m/s on typical summer and winter days, respectively. Comparisons with the results reported in the previous studies about the effect of wind speed on productivity have been carried out.
机译：通过计算机仿真研究了风速V对一些主动和被动太阳剧照的日生产力P_d的影响。为了在被动蒸馏塔中使用不同质量的盆水m_w和在活性蒸馏池中使用各种厚度d_w或流动盐水的质量流量m_w，在Tanta的典型夏季和冬季进行了数值计算，以使P_d与V相关。发现对于主动和多效果被动静止图像，P_d随着V的增加而增加，直到典型速度V_t，超过该速度，P_d的增加变得微不足道。但是，对于所有已研究的单效果被动蒸馏器，都存在盆地水的临界质量（深度），超过该临界值，P_d将随着V的增加而增加，直到V_t。对于流域水质量小于临界质量的水，P_d随着V的增加而减小，直到V_t。在V_t之后，P_d的变化与主动和多效果被动静止图像获得的行为类似，并不重要。发现所研究的单效果被动蒸馏器的盆水临界质量（深度）为45千克（4.5厘米）。此外，典型速度V_t与静止形状和操作模式（主动或被动）无关，但显示出一些季节性依赖性。对于所调查的静止图像，在典型的夏季和冬季，V_t分别为10 m / s和8 m / s。与先前研究中报告的关于风速对生产率的影响的结果进行了比较。

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