Augmenting hemispherical solar still performance: A multifaceted approach with reflectors, external condenser, advanced wick materials, and nano-PCM integration

被引：13

作者：

Alqsair, Umar F. ^{[1
]}

Abdullah, A. S. ^{[1
,2
]}

Younes, M. M. ^{[3
]}

Omara, Z. M. ^{[3
]}

Essa, Fadl A. ^{[3
]}

机构：

[1] Prince Sattam bin Abdulaziz Univ, Coll Engn Al Kharj, Dept Mech Engn, Al Kharj 11942, Saudi Arabia

[2] Tanta Univ, Fac Engn, Mech Power Engn Dept, Tanta 31521, Egypt

[3] Kafrelsheikh Univ, Fac Engn, Mech Engn Dept, Kafrelsheikh 33516, Egypt

来源：

CASE STUDIES IN THERMAL ENGINEERING | 2024年 / 61卷

关键词：

Hemispherical distiller; Mirrors; Wicking materials; Phase changing material; Ag nanomaterial; DESALINATION SYSTEM;

D O I：

10.1016/j.csite.2024.104890

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This study aims at improving the desalination process of hemispherical solar still (HSS). A modified HSS (MHSS) design was developed, incorporating a 35 cm radius hemispherical absorber to heighten vaporization area and sun exposure. The influence of various factors on the MHSS performance was evaluated: wick material (jute cloth vs. cotton wick), rear reflectors for concentrated solar radiation, fan integration for enhanced heat transfer, and a phase change material (PCM) with silver nanoparticles (Ag) positioned beneath the liner. The MHSS design itself achieved a 96 % gain in productivity over HSS. Jute cloth proved to be a more effective wick material than cotton. The MHSS equipped with external reflectors exhibited a significant 120% improvement in productivity. Furthermore, fan integration within the MHSS resulted in a 172 % productivity increase (11150 mL/m2 & sdot;day 2 & sdot; day compared to 4100 mL/m2 & sdot;day 2 & sdot; day for the HSS). Besides, the enhancement (152 %) was observed with the MHSS incorporating both a fan and a PCM-Ag composite, yielding a total daily freshwater production of 10500 mL compared to 4150 mL for the HSS. These findings suggest that the MHSS design with optimized features, particularly the use of a fan and PCM-Ag composite, offers a promising approach to significantly improve solar desalination performance.

引用

页数：13