Experimental investigations on simple and modified concatenated stepped solar still units for the extraction of clean water: A comparative study

IF 9 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy Pub Date : 2024-11-20 DOI:10.1016/j.renene.2024.121957

Ajay Prakash, Mahesh Kumar

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Abstract

In this experimental research work, a parallel comparison of a modified concatenated stepped solar still (MCSSS) unit was done with a simple concatenated stepped solar still (SCSSS) unit for the extraction of clean water, considering thermo-enviro-economic aspects. Each stepped solar still in these experimental units had 0.25 m² heat absorbing area. The MCSSS unit was equipped with internal reflectors, external reflector and glass cover cooling arrangement. The experimental units were feed with a pre-optimized tap water flow rate of 50 ml/min for the extraction of clean water. The comparison revealed that the MCSSS unit produced 3.43 L/day of distillate which was 18.72 % higher than that of SCSSS unit. In the MCSSS unit, the convective and evaporative heat transfer coefficients were found to be 15.29 % and 11.50 % higher, respectively. The energy and exergy efficiencies of MCSSS unit were 41.58 % and 14.52 % which were found to be respectively 19.93 % and 25.93 % higher than that of SCSSS unit. The MCSSS unit had lower energy payback time and earned higher carbon credits as compared to SCSSS unit. The economic payback period of MCSSS unit was evaluated to be lower than SCSSS unit by 1.297 months.

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对用于提取清洁水的简易和改进型阶梯式太阳能蒸馏装置进行实验研究：比较研究

在这项实验研究工作中，考虑到热-环境-经济方面的因素，对改进型并联阶梯式太阳能蒸发器（MCSSS）装置和简单型并联阶梯式太阳能蒸发器（SCSSS）装置进行了平行比较，以提取清洁水。这些实验装置中的每个阶梯式太阳能蒸发器都有 0.25 平方米的吸热面积。MCSSS 装置配有内部反射器、外部反射器和玻璃盖冷却装置。实验装置以 50 毫升/分钟的预优化自来水流速进水，以提取净水。比较结果显示，MCSSS 装置每天产生 3.43 升蒸馏水，比 SCSSS 装置高出 18.72%。在 MCSSS 装置中，对流和蒸发传热系数分别高出 15.29 % 和 11.50 %。MCSSS 装置的能效和放能效分别为 41.58 % 和 14.52 %，比 SCSSS 装置分别高出 19.93 % 和 25.93 %。与 SCSSS 设备相比，MCSSS 设备的能源回收期更短，获得的碳信用额度更高。经评估，MCSSS 装置的经济回收期比 SCSSS 装置低 1.297 个月。

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来源期刊

Renewable Energy 工程技术-能源与燃料

CiteScore

18.40

自引率

9.20%

发文量

1955

审稿时长

6.6 months

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