Thermal performances investigation of a wet cooling tower
Thermal performances investigation of a wet cooling tower
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DOI：
10.1016/j.applthermaleng.2006.08.014
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发表时间：
2007-04
影响因子：
6.4
通讯作者：
M. Lemouari;M. Boumaza;I. Mujtaba
中科院分区：
文献类型：
--
作者：
M. Lemouari;M. Boumaza;I. Mujtaba
本文介绍了一种装有垂直格栅填料的强制通风逆流湿式冷却塔的热力性能试验研究。填料高0.42 m，由四（04）块锯齿形镀锌板组成，其间平行布置三（03）块金属垂直网格，横截面试验面积为0.0222 m2（0.15 m × 0.148 m）。本研究针对不同的进水温度，探讨空气流量与水流量对冷却水范围与冷却塔特性的影响。在气水接触期间观察到两种操作状态，即薄膜状态（PR）和气泡和分散状态（BDR）。这两个制度可以确定最好的方式来促进传热。BDR方案似乎比薄膜方案更有效，因为它能够冷却更大的水流量。所得结果与文献中发现的其他类型的填料之间的比较表明，这种类型具有非常有趣的热性能。
This paper presents an experimental investigation of the thermal performances of a forced draft counter flow wet cooling tower filled with an “VGA” (Vertical Grid Apparatus) type packing. The packing is 0.42m high and consists of four (04) galvanised sheets having a zigzag form, between which are disposed three (03) metallic vertical grids in parallel with a cross sectional test area of 0.0222m2(0.15m×0.148m). This study investigates the effect of the air and water flow rates on the cooling water range as well as the tower characteristic, for different inlet water temperatures. Two operating regimes were observed during the air water contact, a pellicular regime (PR) and a bubble and dispersion regime (BDR). These two regimes can determine the best way to promote the heat transfer. The BDR regime seems to be more efficient than the pellicular regime, as it enables to cool larger water flow rates. The comparison between the obtained results and those found in the literature for other types of packing indicates that this type possesses very interesting thermal performances.