ABSTRACT

A numerical investigation for a solar air heater integrated with a multi-section solar distiller has been conducted with a novel design of solar distiller with interior sections. A mathematical description of the solar distiller is made and solved with a MATLAB code. The air flow in the solar air heater, the water height in the solar distiller, and the number of interior sections have all been studied. To validate the numerical system, an experimental system was built. The theoretical model and the experiment performed appear to be in satisfactory correlation. The best working conditions occur when the system is run with a lower air flow rate, a lower saline water height, and a greater number of interior sections with productivity reaching 1242.6 ml/m² per day, a gain output ratio (GOR) about 0.622 and air heater efficiency about 35%. In the normal case of output salinity between 0 and 500 ppm, the cost was reduced by 96.7%, and by 96.3% in the case of four interior sections. Water cost reduction is also observable at the same output salinity, with 54.1% at 0 ppm and 62.4% at 200 ppm between number of interior sections = 0 and 4.

摘要

对与多段式太阳能蒸馏器集成的太阳能空气加热器进行了数值研究，采用了一种新颖的内部分段式太阳能蒸馏器设计。对太阳能蒸馏器进行了数学描述，并使用 MATLAB 代码求解。太阳能空气加热器中的空气流量、太阳能蒸馏器中的水位高度以及内部截面的数量都经过研究。为了验证数值系统，建立了一个实验系统。理论模型和进行的实验似乎具有令人满意的相关性。当系统以较低的空气流量、较低的盐水高度和更多的内部部分运行时，生产率达到 1242.6 ml/m ^{2时，出现最佳工作条件}每天，增益输出比 (GOR) 约为 0.622，空气加热器效率约为 35%。在输出盐度在 0 到 500 ppm 之间的正常情况下，成本降低了 96.7%，在四个内部部分的情况下成本降低了 96.3%。在相同的输出盐度下也可以观察到水成本降低，在内部部分数量 = 0 和 4 之间，在 0 ppm 时降低 54.1%，在 200 ppm 时降低 62.4%。