Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower

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ŠIROK, Brane ;ROTAR, Maja ;HOČEVAR, Marko ;DULAR, Matevž ;SMREKAR, Jure ;BAJCAR, Tom .
Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 53, n.5, p. 270-284, august 2017. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/improvement-of-the-thermodynamic-properties-in-a-natural-draft-cooling-tower/>. Date accessed: 01 dec. 2021. 
doi:http://dx.doi.org/.
Širok, B., Rotar, M., Hočevar, M., Dular, M., Smrekar, J., & Bajcar, T.
(2007).
Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower.
Strojniški vestnik - Journal of Mechanical Engineering, 53(5), 270-284.
doi:http://dx.doi.org/
@article{.,
	author = {Brane  Širok and Maja  Rotar and Marko  Hočevar and Matevž  Dular and Jure  Smrekar and Tom  Bajcar},
	title = {Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {53},
	number = {5},
	year = {2007},
	keywords = {cooling towers; natural draf; thermodynamic properties; numerical analysis; },
	abstract = {The velocity and temperature fields above droplet eliminators inside a natural-draft cooling tower of the Doel-3 powerplant (Belgium) were determined using the CTP (Cooling Tower Profiler) method. The measurements show regions of high velocities and low temperatures of air at the cooling tower circumference, leading to locally impaired heat and mass transfer. The established phenomenological relations enable the solution of this problem, which can be achieved by a variation of the fill height and the water mass-flow rate. The influence of these two parameters was analysed numerically. A 3D numerical simulation of a single-phase turbulent airflow was performed. Local values of the air velocity and air temperature were included in the numerical model through source terms. The numerical results present the analysis of local irregularities and their influence on the overall cooling-tower characteristics. Experimental and numerical results for the velocity and temperature fields in a cooling tower's transverse section are presented, followed by a procedure for reducing irregularities in the cooling tower's operation. This procedure includes the increase of the fill height and the rearrangement of the local cooling-water mass-flow rate in the cooling tower's transverse section. In the numerical model these two parameters were modelled by a local modification of the source terms. Modified source terms of the model lead to more uniform aero-thermodynamic properties in the tower and consequently to a higher cooling-tower efficiency. The paper presents a complete diagnostic method of local anomalies, based on the case of a representative Doel-3 cooling tower. The method is based on experimental and numerical modelling of the transport phenomena inside the cooling tower. It makes it possible to increase the efficiency of the cooling tower's operation. The calculated mean heat-flux density was increased by 2.8% in this particular case.},
	issn = {0039-2480},	pages = {270-284},	doi = {},
	url = {https://www.sv-jme.eu/article/improvement-of-the-thermodynamic-properties-in-a-natural-draft-cooling-tower/}
}
Širok, B.,Rotar, M.,Hočevar, M.,Dular, M.,Smrekar, J.,Bajcar, T.
2007 August 53. Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 53:5
%A Širok, Brane 
%A Rotar, Maja 
%A Hočevar, Marko 
%A Dular, Matevž 
%A Smrekar, Jure 
%A Bajcar, Tom 
%D 2007
%T Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower
%B 2007
%9 cooling towers; natural draf; thermodynamic properties; numerical analysis; 
%! Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower
%K cooling towers; natural draf; thermodynamic properties; numerical analysis; 
%X The velocity and temperature fields above droplet eliminators inside a natural-draft cooling tower of the Doel-3 powerplant (Belgium) were determined using the CTP (Cooling Tower Profiler) method. The measurements show regions of high velocities and low temperatures of air at the cooling tower circumference, leading to locally impaired heat and mass transfer. The established phenomenological relations enable the solution of this problem, which can be achieved by a variation of the fill height and the water mass-flow rate. The influence of these two parameters was analysed numerically. A 3D numerical simulation of a single-phase turbulent airflow was performed. Local values of the air velocity and air temperature were included in the numerical model through source terms. The numerical results present the analysis of local irregularities and their influence on the overall cooling-tower characteristics. Experimental and numerical results for the velocity and temperature fields in a cooling tower's transverse section are presented, followed by a procedure for reducing irregularities in the cooling tower's operation. This procedure includes the increase of the fill height and the rearrangement of the local cooling-water mass-flow rate in the cooling tower's transverse section. In the numerical model these two parameters were modelled by a local modification of the source terms. Modified source terms of the model lead to more uniform aero-thermodynamic properties in the tower and consequently to a higher cooling-tower efficiency. The paper presents a complete diagnostic method of local anomalies, based on the case of a representative Doel-3 cooling tower. The method is based on experimental and numerical modelling of the transport phenomena inside the cooling tower. It makes it possible to increase the efficiency of the cooling tower's operation. The calculated mean heat-flux density was increased by 2.8% in this particular case.
%U https://www.sv-jme.eu/article/improvement-of-the-thermodynamic-properties-in-a-natural-draft-cooling-tower/
%0 Journal Article
%R 
%& 270
%P 15
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 53
%N 5
%@ 0039-2480
%8 2017-08-18
%7 2017-08-18
Širok, Brane, Maja  Rotar, Marko  Hočevar, Matevž  Dular, Jure  Smrekar, & Tom  Bajcar.
"Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower." Strojniški vestnik - Journal of Mechanical Engineering [Online], 53.5 (2007): 270-284. Web.  01 Dec. 2021
TY  - JOUR
AU  - Širok, Brane 
AU  - Rotar, Maja 
AU  - Hočevar, Marko 
AU  - Dular, Matevž 
AU  - Smrekar, Jure 
AU  - Bajcar, Tom 
PY  - 2007
TI  - Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - cooling towers; natural draf; thermodynamic properties; numerical analysis; 
N2  - The velocity and temperature fields above droplet eliminators inside a natural-draft cooling tower of the Doel-3 powerplant (Belgium) were determined using the CTP (Cooling Tower Profiler) method. The measurements show regions of high velocities and low temperatures of air at the cooling tower circumference, leading to locally impaired heat and mass transfer. The established phenomenological relations enable the solution of this problem, which can be achieved by a variation of the fill height and the water mass-flow rate. The influence of these two parameters was analysed numerically. A 3D numerical simulation of a single-phase turbulent airflow was performed. Local values of the air velocity and air temperature were included in the numerical model through source terms. The numerical results present the analysis of local irregularities and their influence on the overall cooling-tower characteristics. Experimental and numerical results for the velocity and temperature fields in a cooling tower's transverse section are presented, followed by a procedure for reducing irregularities in the cooling tower's operation. This procedure includes the increase of the fill height and the rearrangement of the local cooling-water mass-flow rate in the cooling tower's transverse section. In the numerical model these two parameters were modelled by a local modification of the source terms. Modified source terms of the model lead to more uniform aero-thermodynamic properties in the tower and consequently to a higher cooling-tower efficiency. The paper presents a complete diagnostic method of local anomalies, based on the case of a representative Doel-3 cooling tower. The method is based on experimental and numerical modelling of the transport phenomena inside the cooling tower. It makes it possible to increase the efficiency of the cooling tower's operation. The calculated mean heat-flux density was increased by 2.8% in this particular case.
UR  - https://www.sv-jme.eu/article/improvement-of-the-thermodynamic-properties-in-a-natural-draft-cooling-tower/
@article{{}{.},
	author = {Širok, B., Rotar, M., Hočevar, M., Dular, M., Smrekar, J., Bajcar, T.},
	title = {Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {53},
	number = {5},
	year = {2007},
	doi = {},
	url = {https://www.sv-jme.eu/article/improvement-of-the-thermodynamic-properties-in-a-natural-draft-cooling-tower/}
}
TY  - JOUR
AU  - Širok, Brane 
AU  - Rotar, Maja 
AU  - Hočevar, Marko 
AU  - Dular, Matevž 
AU  - Smrekar, Jure 
AU  - Bajcar, Tom 
PY  - 2017/08/18
TI  - Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 53, No 5 (2007): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - cooling towers, natural draf, thermodynamic properties, numerical analysis, 
N2  - The velocity and temperature fields above droplet eliminators inside a natural-draft cooling tower of the Doel-3 powerplant (Belgium) were determined using the CTP (Cooling Tower Profiler) method. The measurements show regions of high velocities and low temperatures of air at the cooling tower circumference, leading to locally impaired heat and mass transfer. The established phenomenological relations enable the solution of this problem, which can be achieved by a variation of the fill height and the water mass-flow rate. The influence of these two parameters was analysed numerically. A 3D numerical simulation of a single-phase turbulent airflow was performed. Local values of the air velocity and air temperature were included in the numerical model through source terms. The numerical results present the analysis of local irregularities and their influence on the overall cooling-tower characteristics. Experimental and numerical results for the velocity and temperature fields in a cooling tower's transverse section are presented, followed by a procedure for reducing irregularities in the cooling tower's operation. This procedure includes the increase of the fill height and the rearrangement of the local cooling-water mass-flow rate in the cooling tower's transverse section. In the numerical model these two parameters were modelled by a local modification of the source terms. Modified source terms of the model lead to more uniform aero-thermodynamic properties in the tower and consequently to a higher cooling-tower efficiency. The paper presents a complete diagnostic method of local anomalies, based on the case of a representative Doel-3 cooling tower. The method is based on experimental and numerical modelling of the transport phenomena inside the cooling tower. It makes it possible to increase the efficiency of the cooling tower's operation. The calculated mean heat-flux density was increased by 2.8% in this particular case.
UR  - https://www.sv-jme.eu/article/improvement-of-the-thermodynamic-properties-in-a-natural-draft-cooling-tower/
Širok, Brane, Rotar, Maja, Hočevar, Marko, Dular, Matevž, Smrekar, Jure, AND Bajcar, Tom.
"Improvement of the Thermodynamic Properties in a Natural-Draft Cooling Tower" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 53 Number 5 (18 August 2017)

Authors

Affiliations

  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia
  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia
  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia
  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia
  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia
  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 53(2007)5, 270-284

The velocity and temperature fields above droplet eliminators inside a natural-draft cooling tower of the Doel-3 powerplant (Belgium) were determined using the CTP (Cooling Tower Profiler) method. The measurements show regions of high velocities and low temperatures of air at the cooling tower circumference, leading to locally impaired heat and mass transfer. The established phenomenological relations enable the solution of this problem, which can be achieved by a variation of the fill height and the water mass-flow rate. The influence of these two parameters was analysed numerically. A 3D numerical simulation of a single-phase turbulent airflow was performed. Local values of the air velocity and air temperature were included in the numerical model through source terms. The numerical results present the analysis of local irregularities and their influence on the overall cooling-tower characteristics. Experimental and numerical results for the velocity and temperature fields in a cooling tower's transverse section are presented, followed by a procedure for reducing irregularities in the cooling tower's operation. This procedure includes the increase of the fill height and the rearrangement of the local cooling-water mass-flow rate in the cooling tower's transverse section. In the numerical model these two parameters were modelled by a local modification of the source terms. Modified source terms of the model lead to more uniform aero-thermodynamic properties in the tower and consequently to a higher cooling-tower efficiency. The paper presents a complete diagnostic method of local anomalies, based on the case of a representative Doel-3 cooling tower. The method is based on experimental and numerical modelling of the transport phenomena inside the cooling tower. It makes it possible to increase the efficiency of the cooling tower's operation. The calculated mean heat-flux density was increased by 2.8% in this particular case.

cooling towers; natural draf; thermodynamic properties; numerical analysis;