Theoretical and experimental investigations of inlet stratifiers for solar storage tanks
Theoretical and experimental investigations of inlet stratifiers for solar storage tanks
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DOI：
10.1016/j.applthermaleng.2005.01.011
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发表时间：
2005-10
影响因子：
6.4
通讯作者：
L. J. Shah;Elsa Andersen;S. Furbo
中科院分区：
文献类型：
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作者：
L. J. Shah;Elsa Andersen;S. Furbo
通过计算流体动力学对刚性分层器进行理论研究，并通过粒子图像测速和温度测量进行实验研究。分层器由带有三个圆形开口的主管组成。分层器安装在 144 升水箱内。在水箱充注测试中，调查显示冷水箱水通过最低开口吸入分层器。混合后的流体通过顶部开口进入罐体。为了说明在分层器开口处安装翻板作为“止回阀”的影响，用带有翻板的分层器重复了该实验。结果表明，“止回阀”减少了进入最低开口的不需要的流量。为了量化带有襟翼的分层器在其他流量下的工作效果，需要进行更多的储罐充注测试。根据分层器效率，发现分层器对于 5l/min 至 8l/min 之间的流量最为有效。
A rigid stratifier is investigated theoretically with Computational Fluid Dynamics and experimentally with Particle Image Velocimetry and temperature measurements. The stratifier consists of a main tube with three circular openings. The stratifier is mounted inside a 144l water tank. During a tank charge test, the investigations show that cold tank water is sucked into the stratifier through the lowest opening. The mixed fluid enters the tank through the top opening. To illustrate the influence of mounting flaps working as “non-return valves” at the stratifier openings, the experiment is repeated with the stratifier with flaps. The results show that the “non-return valves” reduce the unwanted flows into the lowest opening. To quantify how well the stratifier with the flaps works for other flow rates more tank charge tests are carried out. Based on a stratifier efficiency it is found that the stratifier is most efficient for flow rates between 5l/min and 8l/min.