Three-dimensional numerical study on thermal performance of a super large natural draft cooling tower of 220m height

Based on the heat and mass transfer theory and characteristics of the FLUENT software, a three-dimensional numerical simulation platform composed by user defined functions had been developed to simulate the thermal performance in a natural draft wet cooling tower. This platform was used to study a typical hyperbolic natural draft wet cooling tower with different fill types. The variations of the flow and temperature field in the cooling tower caused by the two different methods of fill were investigated. It is found that the outlet water temperature will decrease due to the non-uniform fill depth. The non-uniform fill depth is beneficial to increasing the efficiency of the cooling tower.

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Three-Dimensional Numerical Study on Thermal Performance in a Natural Draft Wet Cooling Tower

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.614-615.169 ◽

2012 ◽

Vol 614-615 ◽

pp. 169-173

Author(s):

Shui Hua Zheng ◽

Tai Jin ◽

Jian Ren Fan

Keyword(s):

Numerical Simulation ◽

Mass Transfer ◽

Thermal Performance ◽

Water Distribution ◽

Cooling Tower ◽

Numerical Study ◽

Three Dimensional ◽

Cooling Efficiency ◽

Natural Draft ◽

Mass Transfer Theory

Based on the heat and mass transfer theory and characteristics of the CFD software, a three-dimensional numerical simulation platform had been developed to study the thermal performance in a natural draft wet cooling tower. This platform was validated using the measured results of a running cooling tower. The flow and temperature field in the cooling tower were investigated. It is found that the water temperature and flow field can be correctly calculated using this platform. The cooling efficiency could be improved due to non-uniform fill and water distribution methods.

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Numerical Study of Natural Draft Wet Cooling Tower

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.403-408.3191 ◽

2011 ◽

Vol 403-408 ◽

pp. 3191-3194

Author(s):

Shui Hua Zheng ◽

Tai Jin ◽

Jian Ren Fan

Keyword(s):

Numerical Simulation ◽

Thermal Performance ◽

Cooling Tower ◽

Numerical Study ◽

Thermal Power ◽

Three Dimensional ◽

Design Calculation ◽

Simulation Platform ◽

Computational Accuracy ◽

Natural Draft

Natural draft wet cooling tower is one of key equipments in thermal power stations, and its thermal performance influences the efficiency of total thermal system. Based on the heat and mass transfer theory and characteristics of the FLUENT software, a three-dimensional numerical simulation platform had been developed to simulate the thermal performance in a natural draft wet cooling tower. This platform was used to study the heat exchange and flow situation of a typical hyperbolic natural draft wet cooling tower. Comparing and analyzing the results of simulation and design calculation, it indicate that there is good computational accuracy of the three-dimensional numerical simulation platform, and the platform can provide a good support for the design and research of natural draft wet cooling tower.

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Three-Dimensional Regularities of Distribution of Air-Inlet Characteristic Velocity in Natural-Draft wet Cooling Tower

Journal of Hydrodynamics ◽

10.1016/s1001-6058(08)60064-5 ◽

2008 ◽

Vol 20 (3) ◽

pp. 323-330 ◽

Cited By ~ 6

Author(s):

Kai Wang ◽

Feng-zhong Sun ◽

Yuan-bin Zhao ◽

Ming Gao ◽

Yue-tao Shi

Keyword(s):

Cooling Tower ◽

Three Dimensional ◽

Characteristic Velocity ◽

Natural Draft ◽

Air Inlet

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Evaluation of thermal performance for natural and forced draft wet cooling tower

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.13.4.2019.19.0475 ◽

2019 ◽

Vol 13 (4) ◽

pp. 6007-6021 ◽

Cited By ~ 1

Author(s):

M. J. Al-Dulaimi ◽

F. A. Kareem ◽

F. A. Hamad

Keyword(s):

Flow Rate ◽

Thermal Performance ◽

Cooling Tower ◽

Volume Flow Rate ◽

Volume Flow ◽

Experimental Results ◽

Water Volume ◽

Axial Fan ◽

Natural Draft ◽

Forced Draft

This paper presents an experimental and numerical investigation of the thermal performance of natural draft wet cooling tower (NDWCT). The experimental investigation is carried out under natural draft condition and forced draft condition created by an axial fan. The operational parameters considered in this study are the thickness of the fill (10 and 20 cm), inlet water temperature (40, 45, and 50 °C) and inlet water volume flow rate (5.68, 7.75, and 9.46 L/min). The experimental results showed that the thermal performance is improved when the fans are used with the NDWCT. The temperature difference between inlet and outlet and effectiveness increase by 35% and 37.2%, respectively at fill thickness of 20 cm and water volume flow rate of 11.35 L/min. The temperature distribution of the air and the relative humidity were numerically simulated for both cases of natural and forced draft by employing the commercial CFD software ANSYS Fluent 15. The experimental and numerical results were validated with results from a previous work and showed a good agreement. The experimental results showed that the effectiveness increase by 22% and 30% for NDWCT and FDWCT respectively when in case of fill thickness 20 cm.

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