Change structure of cooling towers with deletion cellulose pads (packing) and air blower and use vacuum mechanism

Mahdi MOSTAGHELCHI, Seyyed Ali Agha MIRJALILY, Seyyed Amir Abbass OLOOMI
1.783 371


Abstract. Topics studied in this project are to change the structure of wet cooling towers that are used in refrigerating industry. Base of working in all existing wet cooling is on upgrading heat exchange between air and cooling liquid and increasing surface evaporation and more contact between water and air. Generally, in cooling towers heated water by pipes is moved to the top of the tower. In this route water has heat exchange ventilator with outgoing air, is cooled and collected in bottom of the tower. In order to increase the contact area between water and air in the course of water falling, special packing that cellulose pad is the most common type of it is used. Cooling towers available have disadvantages such as: precipitation, corrosion of internal components, the growth of algae and biological bacteria, occupy too much space, too much noise, do not use in damp, dust in the system, not using towers together, reducing cooling efficiency over time and etc. Now if circumstances arise that tower can work in a closed cycle, in a small space, away from light, with more efficiency, longer life and different structure is ideal. Now the present project attempt is by reducing the pressure on the water surface in a closed container, increase water evaporation rate. And by using an evaporation tower, Shower, electrical controllers, alternative mechanisms and exhaust valves saturated steam, to achieve substantial cold in absence of cellulose pads and blower pump and greatly reduce water temperature Also flaws in the cooling towers such as reduction in cooling efficiency due to precipitation and decrease in performance of cellulose pads, failure to use several cooling towers next to each other, the entry of dust into the system, a lot of space, algae and biological bacteria , a lot of noise, water falling from the towers and on the ground in the surrounding space, high maintenance costs to be eliminated or minimized. The empirical research shows that due to structure designed with the placement of  0.04 atmospheric pressure on the surface of the water. In terms of sustainability, water outlet temperature is in range of 24 ° C and this means an increase in efficiency of about 30 percent compared to existing models.


cooling tower, packing, Evaporative cooling, Water Chillers, vacuum mechanism

Full Text:



M. Gao, F.Zh Sun, N.N. Wang, et al., Experimental research on circumferential inflow air and vortex distribution for wet cooling tower under crosswind conditions, Appl. Therm. Eng. 64 (2014) 93e100.

R. Al-Waked, M. Behnia, Enhancing performance of wet cooling towers, Energy Convers. Manag. 48 (10) (2007) 2638e2648.

M. Gao, F.Zh. Sun, Sh. J. Zhou, et al., Performance prediction of wet cooling tower using artificial neural network under cross-wind conditions, Int. J. Therm. Sci. 48 (2009) 583e589.

M. Gao, Y.T. Shi, N.N. Wang, et al., Artificial neural network model research on effects of cross-wind to performance parameters of wet cooling tower based on level Froude number, Appl. Therm. Eng. 51 (2013) 1226e1234.

Y.L. Chen, F.Zh. Sun, H.G. Wang, et al., Experimental research of the cross walls effect on the thermal performance of wet cooling towers under crosswind conditions, Appl. Therm. Eng. 31 (2011) 4007e4013.

K. Wang, F.Zh Sun, Y.B. Zhao, et al., Experimental research of the guiding channels effect on the thermal performance of wet cooling towers subjected to crosswinds, Appl. Therm. Eng. 30 (2010) 533e538.

J.C. Kloppers, D.G. Kreoger, A critical investigation into the heat and mass transfer analysis of counterflow wet-cooling towers, Int. J. Heat Mass Transf. 48 (3e4) (2005) 765e777.

W. Asvapoositkul, S. Treeutok, A simplified method on thermal performance capacity evaluation of counter flow cooling tower, Appl. Therm. Eng. 38 (2012) 160e167.

L. Wang, N.P. Li, Exergy transfer and parametric study of counter flow wet cooling towers, Appl. Therm. Eng. 31 (2011) 954e960.

T. Muangnoi, W. Asvapoositkul, S. Wongwises, An exergy analysis on the performance of a counter flow wet cooling tower, Appl. Therm. Eng. 27 (5e6) (2007) 910e917.

R. Terblanche, H.C.R. Reuter, D.G. Kreoger, Drop size distribution below different wet- cooling tower fills, Appl. Therm. Eng. 29 (2009) 552e560.

Bilal A. Qureshi, Syed M. Zubair, A complete model of wet cooling towers with fouling in fills, Appl. Therm. Eng. 26 (2006) 1982e1989.

P.J. Grobbelaar, H.C.R. Reuter, T.P. Bertrand, Performance characteristics of a trickle fill in cross-and counter-flow configuration in a wet-cooling tower, Appl. Therm. Eng. 50 (2013) 475e484.

M. Lemouari, M. Boumaza, Experimental investigation of the performance characteristics of a counter-flow wet cooling tower, Int. J. Therm. Sci. 49 (2010) 2049e2056.

J.C. Kloppers, D.G. Kroger, Loss coefficient correlation for wet-cooling tower fills, Appl. Therm. Eng. 23 (2003) 2201e2211.

J. Smrekar, J. Oman, B. Sirok, Improving the efficiency of natural draft cooling towers, Energy Convers. Manag. 47 (9e10) (2006) 1086e1100.

M. Hosoz, H.M. Ertunc, H. Bulgurcu, Performance prediction of a cooling tower using artificial neural network, Energy Convers. Manag. 48 (4) (2007) 1349e1359.

M. Gao, F. Zh. Sun, K. Wang, et al., Experimental research of heat transfer performance on natural draft counter flow wet cooling tower under crosswind conditions, Int. J. Therm. Sci. 47 (2008) 935e941. crosswinds, Appl

F. Gharagheizi, R. Hayati, S. Fatemi, “Experimental study on the performance of mechanical cooling tower with two types of film packing”, Energ. Convers. Manage., 48 (2007) 277–280.

Dewett, david p. incropera, frank p., introduction to heat transfer 4th end., 2002.