Influence of non-uniform layout fillings on thermal performance for wet cooling tower

Abstract Based on the similarity theory, thermal-state model experiment in lab is performed to investigate the thermal performance of wet cooling towers under different layout patterns of fillings, and five kinds of layout patterns, including uniform layout and four kinds of non-uniform layout patterns, are studied in this paper. Experimental results manifest that the thermal performance of wet cooling towers under non-uniform layout patterns is outstanding by calculating and analyzing five performance parameters, which are ooling termperature difference, cooling efficiency, Merkel number, Lewis number and the ratio of evaporative heat rejection. Additionally, research also obtained the optimal three-block layout pattern of fillings in which the radius ratio of r a / r c is approximately 0.44 and r b / r c is around 0.71; here r a , r b and r c are the radius of three blocks, respectively. What's more, compared with the uniform layout pattern of fillings, the thermal performance of the optimal layout pattern can enhance by 30% at maximum within the scope of this test.

[1]  Fengzhong Sun,et al.  Experimental research on circumferential inflow air and vortex distribution for wet cooling tower under crosswind conditions , 2014 .

[2]  Ali Turan,et al.  Experimental study regarding the evolution of temperature profiles inside wet cooling tower under crosswind conditions , 2014 .

[3]  Masud Behnia,et al.  Comparison of a 2D axisymmetric CFD model of a natural draft wet cooling tower and a 1D model , 2008 .

[4]  Tao Ning,et al.  Experimental investigation on the performance of wet cooling towers with defects in power plants , 2015 .

[5]  P. J. Erens,et al.  Modelling of cooling tower splash pack , 1996 .

[6]  Ming Gao,et al.  Artificial neural network model research on effects of cross-wind to performance parameters of wet cooling tower based on level Froude number , 2013 .

[7]  Farhad Gharagheizi,et al.  Experimental study on the performance of mechanical cooling tower with two types of film packing , 2007 .

[8]  Bu-Xuan Wang,et al.  A novel concept for convective heat transfer enhancement , 1998 .

[9]  Masud Behnia,et al.  Numerical simulation of flow in a natural draft wet cooling tower – The effect of radial thermofluid fields , 2008 .

[10]  M. El-Wakil.  Power Plant Technology , 1984 .

[11]  Syed M. Zubair,et al.  A comprehensive design and performance evaluation study of counter flow wet cooling towers , 2004 .

[12]  Detlev G. Kröger,et al.  A critical investigation into the heat and mass transfer analysis of counterflow wet-cooling towers , 2005 .

[13]  Fengzhong Sun,et al.  Experimental research of heat transfer performance on natural draft counter flow wet cooling tower under cross-wind conditions , 2008 .

[14]  Kankanhalli N. Seetharamu,et al.  Experimental investigation of the performance of a counter-flow, packed-bed mechanical cooling tower , 1998 .

[15]  Adam Klimanek,et al.  Solution of heat and mass transfer in counterflow wet-cooling tower fills , 2009 .

[16]  M. Boumaza,et al.  Experimental analysis of heat and mass transfer phenomena in a direct contact evaporative cooling tower , 2009 .

[17]  Jose A. Sirena,et al.  The Use of a Thermo-Fluid Dynamic Efficiency in Cooling Towers , 2002 .

[18]  Syed M. Zubair,et al.  A complete model of wet cooling towers with fouling in fills , 2006 .

[19]  Hanno C. R. Reuter,et al.  Drop size distribution below different wet-cooling tower fills , 2009 .

[20]  Pertti Heikkilä,et al.  A COMPREHENSIVE APPROACH TO COOLING TOWER DESIGN , 2001 .

[21]  Detlev G. Kröger,et al.  Loss coefficient correlation for wet-cooling tower fills , 2003 .

[22]  M. Boumaza,et al.  Thermal performances investigation of a wet cooling tower , 2007 .

[23]  Masud Behnia,et al.  Thermal optimization of a natural draft wet cooling tower , 2008 .

[24]  Somchai Wongwises,et al.  AN EXERGY ANALYSIS ON THE PERFORMANCE OF A COUNTERFLOW WET COOLING TOWER , 2007 .

[25]  M. Boumaza,et al.  Experimental investigation of the performance characteristics of a counterflow wet cooling tower , 2010 .

[26]  J. C. Kloppers,et al.  A critical evaluation and refinement of the performance prediction of wet-cooling towers , 2003 .

[27]  Arash Mirabdolah Lavasani,et al.  Experimental study on the thermal performance of mechanical cooling tower with rotational splash type packing , 2014 .