ABSTRACT

The aim of this study is to experimentally investigate the impact of several design parameters on the performance of an active solar still that is typically used to produce desalinated water. Thus, a solar still with 1 × 1 m² basin area and 1 m height has been designed and constructed to carry out the experiments. This solar still was integrated with a photovoltaic unit to generate electricity to power two circulation pumps (CPs) and one electric heater (EH). These CPs and EH were immersed in the water basin to increase the turbulence intensity and temperature of the water molecules in the still basin and hence increase the water productivity. The impact of varying the water depth, circulating the basin water via CPs, and heating the basin water via EH on the solar still performance has been evaluated in a conventional solar still (CSS), an active solar still (CSS with CPs), and another active solar still (CSS with CPs and EH). The experimental results revealed that the water productivity increases as the water depth decreases: the daily productivity of the CSS with CPs increased by approximately 10% when the water depth was decreased from 6 to 3 cm. Moreover, compared to that of CSS at a water depth of 3 cm, the daily water productivity increased approximately 20% and 24% in cases of CSS with CPs and CSS with CPs and EH, respectively. Finally, an economic study was carried out to confirm the feasibility of the solar still. This study illustrated that the constructed solar still is economically feasible, and the estimated benefit-cost ratio is 4.1.

摘要

本研究的目的是通过实验研究几个设计参数对通常用于生产淡化水的活性太阳能蒸馏器性能的影响。因此，具有 1 × 1 m ²的太阳能蒸馏器已设计并建造了盆地面积和 1 m 高度以进行实验。该太阳能蒸馏器与光伏装置集成在一起，以发电为两个循环泵 (CP) 和一个电加热器 (EH) 提供动力。这些 CPs 和 EH 被浸入水盆中，以增加静止盆中水分子的湍流强度和温度，从而提高水的生产率。改变水深、通过 CP 循环盆地水以及通过 EH 加热盆地水对太阳能蒸馏器性能的影响已在传统太阳能蒸馏器 (CSS)、活性太阳能蒸馏器 (CSS with CPs) 和另一个活跃的太阳能蒸馏器（带有 CP 和 EH 的 CSS）。实验结果表明，随着水深的减小，产水量增加：当水深从 6 cm 减少到 3 cm 时，带有 CPs 的 CSS 的日生产力增加了大约 10%。此外，与 3 cm 水深的 CSS 相比，含 CPs 的 CSS 和含 CPs 和 EH 的 CSS 的日产水量分别增加了约 20% 和 24%。最后，进行了经济研究以确认太阳能蒸馏器的可行性。本研究表明，所建造的太阳能蒸馏器在经济上是可行的，预计效益成本比为 4.1。进行了一项经济研究，以确认太阳能蒸馏器的可行性。本研究表明，所建造的太阳能蒸馏器在经济上是可行的，预计效益成本比为 4.1。进行了一项经济研究，以确认太阳能蒸馏器的可行性。本研究表明，所建造的太阳能蒸馏器在经济上是可行的，预计效益成本比为 4.1。