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首页> 外文期刊>International journal of sustainable engineering >Experimental comparative study on a solar still combined with evacuated tubes and a heat exchanger at different water depths
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Experimental comparative study on a solar still combined with evacuated tubes and a heat exchanger at different water depths

机译：太阳能仍然与疏散管和不同水深的热交换器结合的实验比较研究

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摘要

The low freshwater output is always a matter of concern regarding a solar still. It is observed from the current literature that evacuated tubes are directly connected to the still basin for productivity enhancement. The main limitation of integrating evacuated tubes directly to solar still is rapid scaling on the inner surfaces of tubes due to the presence of dissolved impurities in water. This increases thermal resistance and decreases the overall performance of the still. In the present experimental study, a copper tube heat exchanger is installed in still basin and waste engine oil is utilised as a working fluid in the evacuated tube collector (ETC) and heat exchanger circuit. This modification increases the evaporation rate of basin water and boosts freshwater output. The modified still is experimentally investigated at distinct water depths of 4 cm, 5 cm and 6 cm, and the performance is simultaneously compared with a conventional still. Experimental results showed maximum daily productivity of 7.38 L/m(2) day and daily efficiency of 30.5% achieved for modified still at 4 cm water depth. These values are 138.9% and 2.1% higher than that of conventional still respectively at same water depth.
机译：低淡水产量始终仍然是太阳能的问题。从目前的文献中观察到抽空管直接连接到静止盆的生产率提高。将抽空管直接整合到太阳能的主要限制仍然是由于水中溶解的杂质存在而在管内的内表面上快速缩放。这增加了耐热性并降低了静止的整体性能。在本实验研究中，铜管热交换器安装在仍然盆地中，并且废物发动机油被用作抽空管收集器（ETC）和热交换器电路中的工作流体。这种改变提高了盆地水的蒸发速率，提高了淡水输出。在不同的水深在4厘米，5cm和6cm的不同水深进行了经过实验研究，并且与常规静止的同时性能同时进行。实验结果表明，最大每日生产力为7.38升/米（2）天，日常效率为30.5％，仍有4厘米的水深。这些值比在相同的水深在相同的水深分别比常规值高出138.9％和2.1％。

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