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Energy, exergy, environmental benefits and economic aspects of novel hybrid solar still for sustainable water distillation
Process Safety and Environmental Protection ( IF 7.8 ) Pub Date : 2021-04-07 , DOI: 10.1016/j.psep.2021.04.003
H. Sharon

In this work, a novel hybrid solar still which occupies less ground area has been proposed and investigated under the climatic conditions of Chennai, India. Hybrid solar still is formed by integrating basin solar still and vertical diffusion still. The proposed unit has been thermodynamically modeled and the effect of area ratio of basin to vertical absorber, diffusion gap, basin water depth, shade and feed water flow rate on unit’s performance has been investigated. Optimum vertical diffusion still absorber area to basin area ratio, diffusion gap, basin water depth and feed water flow rate are found to be 2.0, 0.02 m, 0.02 m and two & half times the condensate production rate in vertical diffusion solar still, respectively. Shading of vertical absorber is found to decline the overall condensate production rate in a rapid manner. Exergy efficiency, exergy destruction and improvement potential of each component of hybrid solar still for all months has also been reported. The hybrid solar still is found to have high performance in winter seasons rather than summer seasons. Maximum condensate productivity rate, thermal and exergy efficiency of the optimized hybrid solar still is about 13.79 kg/d, 56.17 % and 6.93 %, respectively. Condensate production cost per litre ranges between 1.10 INR/L to 3.83 INR/L depending on wick replacement frequency, interest rate and life span of the unit. Energy payback time and finance payback time of the unit is within 1.2 Year and within 4.0 Year, respectively. Net CO2 emission, SO2 emission and NO emission mitigated by the unit ranges between 23.4–63.1 tons, 168.0–453.8 kg and 68.6–185.6 kg, respectively. Reasonable condensate production rate with acceptable price and environmental benefits has made this proposed still more promising for practical applications.



中文翻译:

用于可持续水蒸馏的新型混合太阳能蒸馏器的能源,火用,环境效益和经济方面

在这项工作中,已经提出并研究了一种在印度钦奈气候条件下占地面积较小的新型混合太阳能蒸馏器。混合式太阳能蒸馏器是通过整合盆式太阳能蒸馏器和垂直扩散式蒸馏器而形成的。对所提出的装置进行了热力学建模,研究了盆与垂直吸收器的面积比,扩散间隙,盆水深度,阴影和给水流速对装置性能的影响。最佳垂直扩散式静态蒸馏塔的面积比,扩散间隙,池水深度和给水流量的最佳值分别为垂直扩散式太阳能蒸馏器的2.0、0.02 m,0.02 m和凝结水生产率的两倍和一半。发现垂直吸收器的阴影迅速降低了总冷凝物的生产率。还报告了混合型太阳能每个组件在整个月内的火用效率,火用破坏和改进潜力。人们发现,混合太阳能仍然在冬季而不是夏季具有高性能。优化后的混合太阳能的最大冷凝水生产率,热效率和火用效率分别约为13.79 kg / d,56.17%和6.93%。每升冷凝水的生产成本在1.10 INR / L至3.83 INR / L之间,具体取决于灯芯的更换频率,利率和设备的使用寿命。单位的能源回收期和财务回收期分别在1.2年和4.0年之内。净CO 人们发现,混合太阳能仍然在冬季而不是夏季具有高性能。优化后的混合太阳能的最大冷凝水生产率,热效率和火用效率分别约为13.79 kg / d,56.17%和6.93%。每升冷凝水的生产成本在1.10 INR / L至3.83 INR / L之间,具体取决于灯芯的更换频率,利率和设备的使用寿命。单位的能源回收期和财务回收期分别在1.2年和4.0年之内。净CO 人们发现,混合太阳能仍然在冬季而不是夏季具有高性能。优化后的混合太阳能的最大冷凝水生产率,热效率和火用效率分别约为13.79 kg / d,56.17%和6.93%。每升冷凝水的生产成本在1.10 INR / L至3.83 INR / L之间,具体取决于灯芯的更换频率,利率和设备的使用寿命。单位的能源回收期和财务回收期分别在1.2年和4.0年之内。净CO 83 INR / L,取决于灯芯更换频率,利率和设备寿命。单位的能源回收期和财务回收期分别在1.2年和4.0年之内。净CO 83 INR / L,取决于灯芯更换频率,利率和设备寿命。单位的能源回收期和财务回收期分别在1.2年和4.0年之内。净CO单位减少的2排放量,SO 2排放量和NO排放量分别在23.4–63.1吨,168.0–453.8千克和68.6–185.6千克之间。合理的冷凝水生产率以及可接受的价格和环境效益,使得该建议对于实际应用而言仍然更具希望。

更新日期:2021-04-13
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