Experimental and numerical investigation on suppression of thermal stratification in a water-pool: PIV measurements and CFD simulations
Experimental and numerical investigation on suppression of thermal stratification in a water-pool: PIV measurements and CFD simulations
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DOI：
10.1016/j.applthermaleng.2018.04.070
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发表时间：
2018-06
影响因子：
6.4
通讯作者：
Sunil Kumar;R. Grover;H. Yadav;P. Vijayan;Umasankari Kannan;A. Agrawal
中科院分区：
文献类型：
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作者：
Sunil Kumar;R. Grover;H. Yadav;P. Vijayan;Umasankari Kannan;A. Agrawal
本文分别使用粒子图像测速 (PIV) 技术和计算流体动力学 (CFD) 模拟对按比例缩放的透明水池中进行的热分层现象进行实验和数值研究。实验旨在模拟带有浸入式热交换器的水池中的热分层。一般来说，带有浸入式热交换器的水池往往会出现热分层。防止除热过程中整个池的混合和参与。该论文提出的研究重点是在没有护罩的情况下对水池中的热分层进行量化，并研究了护罩对抑制热分层的效果。三个护罩的安装将水池分为四个隔间，并确保整个水池库存参与热量排出过程。在所有四个隔室中，自加热器开始传热以来都观察到池水循环。在三罩配置中，由于混合，顶部附近的水温上升速率降低。
This paper deals with experimental and numerical investigation on thermal stratification phenomenon conducted in a scaled transparent pool using Particle Image Velocimetry (PIV) technique and Computational Fluid Dynamics (CFD) simulations respectively. Experiments were designed to simulate thermal stratification in a pool with an immersed heat exchanger. In general, pools with an immersed heat exchanger tend to get thermally stratified; preventing mixing and participation of the whole pool during the heat removal process. The study presented in the paper, focuses on quantification of thermal stratification in the pool without shrouds and examines the effect of shrouds on suppression of thermal stratification. The installation of three shrouds divides the pool in four compartments and ensures participation of the whole pool inventory in the heat removal process. In all the four compartments, pool water circulation was observed since the beginning of the heat transfer from the heater. In a three-shroud configuration, because of mixing, rate of rise of temperature of water near the top decreases.