Abstract

An experimental analysis was carried out with basin-type vertical multiple-effect diffusion solar still coupled with solar pond (BVMEDS-SP) to evaluate 24 hours overall performance of still by varying feed flow rate and temperature in addition to other affecting parameters. A solar pond was utilized to harness solar energy diurnal and the same energy was provided to basin water nocturnal in batch mode to produce distillate throughout the day. It can be seen that the daily energy and exergy performance of BVMEDS-SP having four effects was improved by 21.74% and 16.83%, respectively, when the feed flow rate was reduced from 0.32 g/m²/s to 0.13 g/m²/s. As the temperature of feed water was enhanced from 25.65°C to 32.4°C, the daily energy and exergy efficiency of BVMEDS-SP correspondingly increased by 41.76% and 46.62%. In addition, increasing the number of effects from 2 to 5 improved the overall energy and exergy efficiency to 93.15% and 171.80%, respectively. The cost analysis revealed that cost of distillate for 2-effect still was Rs. 4.64/kg and it reduced to Rs. 3.11/kg for 7-effect still. A productivity correlation was furthermore developed and estimated that the experimental database of current research was in good agreement with the error band of −5% to +10%.

中文翻译：

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池式垂直多效扩散太阳能蒸馏器与太阳能池的性能分析：能源、火用和经济分析

摘要

使用盆式垂直多效扩散太阳能蒸馏器与太阳能池 (BVMEDS-SP) 进行了实验分析，以通过改变进料流速和温度以及其他影响参数来评估蒸馏器 24 小时的整体性能。一个太阳能池被用来在白天利用太阳能，并以分批模式向夜间的盆地水提供相同的能量，以全天生产蒸馏水。可以看出，当进料流速从0.32 g/m ² /s降低到0.13 g/m ²时，具有四种效果的BVMEDS-SP的日能量和火用性能分别提高了21.74%和16.83%/秒。随着给水温度从25.65℃提高到32.4℃，BVMEDS-SP的日能效和火用效率分别提高了41.76%和46.62%。此外，将效果数从 2 增加到 5 将整体能量和火用效率分别提高到 93.15% 和 171.80%。成本分析显示，2 效馏出物的成本仍为卢比。4.64/kg，它减少到卢比。7 效蒸馏器为 3.11/kg。进一步开发了生产力相关性，并估计当前研究的实验数据库与 -5% 至 +10% 的误差带非常吻合。