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Optimization of guide vane positions in bended inflow of mechanical draft wet-cooling tower

Klimanek A., Musioł T., Stechman A.

Archives of Thermodynamics

2011

Vol. 32, no. 3

263-272

Optimization of vane positions in a mechanical draft wet-cooling tower is presented in this paper. The originally installed, equally spaced, vanes produced non-uniform air velocity distribution reducing the performance of the fill of the cooling tower. A 2D CFD model of the tower has been created. The model has then been used to determine the objective function in the optimization procedure. The selected objective function was the standard deviation of the velocity of air entering the fill. The Goal Driven Optimization tools of the ANSYS Workbench 2.0 have been used for the optimization and the ANSYS Fluent 13.0 as a flow solver. The optimization allowed reduction of the objective function and producing a more uniform air flow.

On a numerical model of a natural draught wet-cooling tower

Klimanek A., Białecki R.

Archives of Thermodynamics

2008

Vol. 29, no. 4

63-72

In this paper the numerical model of a natural draught wet-cooling tower is presented. The model encompasses the tower and the surrounding environment. The analysis was performed using a commercial CFD code. The most important region of the heat and mass transfer is the fill. The process of heat and mass transfer is described by four ordinary differential equations that are solved by an external program. An original method called the Proper Orthogonal Decomposition (POD) has been applied to represent the heat and mass transfer in the fill. This technique allowed substantial reduction of computational time in the external program. The Euler-Euler model was used to calculate the multiphase flow in the rain zone. Results of the simulation are compared with data obtained experimentally and from other computational method. The comparison comprises a successful validation of the model.

Dwustopniowa chłodnia wody obiegowej : badania procesu chłodzenia wody

Hehlmann J., Bania D.

Inżynieria i Aparatura Chemiczna

2006

Nr 6s

81-82

The aim of the paper is to present the investigation results of the water cooling process in a two-stage cooling tower. The process model of cooling tower has been developed together with equations allowing one to determine mass transfer coefficients in the cooling tower. The coefficients can be applied in a broad range of process and constructional parameters.

Dwustopniowa chłodnia wody obiegowej : badania hydrauliki wypełnień

Hehlmann J., Bania D.

Inżynieria i Aparatura Chemiczna

2006

Nr 6s

79-80

The aim of the paper is to present investigations of the packing hydraulics applied to a two-stage cooling tower. A co-current section of the cooling tower has been equipped with the high-performance skew cellular packing generating the dispersion regime of liquid flow. The specific structured packing is proposed for the counter-current section. It can be used in the film, bubbling and emulsion regimes. Additionally, there have been defined the characteristic areas of work as well as equations of the gas pressure drop through a packing bed.