ABSTRACT

The daily productivity of two solar stills (SSs) was investigated experimentally and numerically. Two modifications were done to increase the daily productivity of the conventional SS which include the embedment of mirrors on two side walls and perforated-suspended plate (SP) with various depths. The perforated-SP was placed inside the basin water with different bed depths. The left and right sides were fabricated in double glass with a gap distance to avoid more heat losses from the side walls and simultaneously to place a mirror according to the daytime. The theoretical model was solved numerically by utilizing the fourth-order Runge–Kutta method and the program was written by FORTRAN. The experimental results of conventional SS were verified by the numerical method. The maximum productivity was obtained 4.24 kg/m²/day where the mirror was placed in sides and the suspend plate was placed at 0.7 cm in the basin water with a depth of 2.6 cm. The daily productivity was increased by 43% compared to the conventional type. In addition, the thermal efficiency of SS increased 28% in comparison to the conventional SS. The results of the experimental study illustrate that utilizing mirror in sides and suspend plate on the basin water has obvious enhancement in the daily productivity.

摘要

通过实验和数值研究了两个太阳剧照（SS）的日生产率。为了提高常规SS的日常生产率，进行了两项修改，其中包括在两个侧壁上嵌入镜子以及具有不同深度的穿孔悬挂板（SP）。将穿孔的SP放置在具有不同床深的水池水中。左侧和右侧均采用双层玻璃制成，并具有一定的间距，以避免更多的热量从侧壁散失，并同时根据白天放置镜子。利用四阶Runge-Kutta方法对理论模型进行了数值求解，该程序由FORTRAN编写。数值模拟验证了常规不锈钢的实验结果。获得最大生产率4.24 kg / m ²/天，其中将镜子侧向放置，并将悬挂板放置在水池水中0.7厘米处，深度2.6厘米。与传统类型相比，每日生产率提高了43％。此外，与传统的SS相比，SS的热效率提高了28％。实验研究结果表明，在流域水面上利用侧面镜和悬挂板可以明显提高日生产力。