CFD modeling of a gravel coarse aggregate sensible heat storage assisted single slope solar still
CFD modeling of a gravel coarse aggregate sensible heat storage assisted single slope solar still
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DOI：
10.5004/dwt.2021.26554
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发表时间：
2021-01-01
影响因子：
1.1
通讯作者：
Midhun, M.
中科院分区：
文献类型：
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作者：
Dhivagar, R.;Mohanraj, M.;Midhun, M.
太阳能蒸馏海水淡化是生产饮用水的成熟技术。在太阳能蒸馏器的性能改进方面已经进行了许多研究。本研究旨在利用砾石粗集料作为显热储热材料，以提高单坡太阳能蒸馏器的效率。为了实现这一点，入口盐水在进入太阳能蒸馏池之前使用砾石粗骨料预热。在哥印拜陀市相同的气候条件下，将这种砾石粗骨料辅助太阳能蒸馏器（卡斯）的观测结果与传统太阳能蒸馏器（CSS）的实验结果进行了比较。此外，计算流体力学模型已被开发用于预测卡斯的性能。采用ANSYS FLUENT v19.2软件建立了两相-三维模型。分析认为该系统为准稳态，并对结果进行了实验验证，最大偏差为14%。结果表明，卡斯模拟和实验的最大能量效率分别约为28.6%和25.1%。此外，模拟和实验观察遵循类似的模式。研究表明，计算流体力学（CFD）可以作为太阳能蒸馏器结构设计、参数分析和难点排除的主要工具。
Solar still desalination is the well-established technology for producing potable drinking water. Many research initiatives have been made on performance improvements in solar stills. This study is intended to improve the efficiency of single slope solar still using a gravel coarse aggregate as sensible heat storage material. In order to achieve this, the inlet saline water was preheated using gravel coarse aggregate before entering into the solar still basin. The results observed from this gravel coarse aggregate assisted solar still (CASS) has been compared with conventional solar still (CSS) experimentally under the same climate conditions of Coimbatore city. Furthermore, the computational fluid dynamics model has been developed for predicting the performance of CASS. The two-phase - three-dimensional model has been developed using ANSYS FLUENT v19.2 software. The analysis considered that the system was quasi-steady state and the results were experimentally validated with the maximum deviation of 14%. The results showed that, the maximum energy efficiency of CASS simulation and experimental were about 28.6% and 25.1%, respectively. Moreover, the simulated and experimental observations were followed a similar pattern. This study shows that computational fluid dynamics (CFD) can be used as the major tool for design, parametric analysis, and difficulties removal in solar still construction.