Predicting thermal performance of a closed-wet cooling tower for chilled ceilings

1999 ◽  
Vol 20 (4) ◽  
pp. 185-194 ◽  
Author(s):  
G. Gan ◽  
S.B. Riffat
Keyword(s):  
Thermal Performance ◽  
Cooling Tower ◽  
Closed Wet Cooling Tower

Thermal performance analysis of a closed wet cooling tower

2007 ◽  
Vol 221 (3) ◽  
pp. 139-150 ◽  
Author(s):  
V. D. Papaefthimiou ◽  
T. C. Zannis ◽  
E. D. Rogdakis
Keyword(s):  
Thermal Performance ◽  
Cooling Tower ◽  
Water Mass ◽  
Cooling Capacity ◽  
Inlet Temperature ◽  
Water Stream ◽  
Detailed Model ◽  
Air Mass ◽  
Mass Flowrate ◽  
Closed Wet Cooling Tower

A detailed model was developed and employed to examine the thermal performance of a closed wet cooling tower. The model is capable of predicting the variation of air thermodynamic properties, sprayed and serpentine water temperature as well as heat transfer rates exchanged between air and falling water stream inside the indirect wet cooling tower. The reliability of simulations was tested against experimental data obtained from the literature. A parametric study was conducted to evaluate the thermal behaviour of the indirect cooling tower under various air mass flowrates, serpentine water mass flowrates and inlet temperatures. The results of the theoretical investigation revealed an increase in cooling capacity and percentage loss of sprayed water due to evaporation, with increasing air mass flowrate. On the other hand, the increase of serpentine water mass flowrate resulted in slight increase in the overall temperature reduction of serpentine water. The effect of variable serpentine water inlet temperature on thermal performance of the indirect wet cooling tower was insignificant compared to other cases.

Thermal performance of a closed wet cooling tower for chilled ceilings: measurement and CFD simulation

2000 ◽  
Vol 24 (13) ◽  
pp. 1171-1179 ◽  
Author(s):  
Saffa Riffat ◽  
Armando Oliveira ◽  
Jorge Fac�o ◽  
Guohui Gan ◽  
Prince Doherty
Keyword(s):  
Thermal Performance ◽  
Cooling Tower ◽  
Cfd Simulation ◽  
Closed Wet Cooling Tower

Experimental and computational analysis of thermal performance of the oval tube closed wet cooling tower

2012 ◽  
Vol 35 ◽  
pp. 233-239 ◽  
Author(s):  
Wei-Ye Zheng ◽  
Dong-Sheng Zhu ◽  
Jin Song ◽  
Li-Ding Zeng ◽  
Hong-jian Zhou
Keyword(s):  
Thermal Performance ◽  
Computational Analysis ◽  
Cooling Tower ◽  
Oval Tube ◽  
Closed Wet Cooling Tower

scholarly journals On Thermal Performance of Seawater Cooling Towers

2010 ◽  
Author(s):  
Mostafa H. Sharqawy ◽  
John H. Lienhard ◽  
Syed M. Zubair
Keyword(s):  
Thermal Conductivity ◽  
Power Generation ◽  
Thermal Performance ◽  
Cooling Tower ◽  
Cooling Towers ◽  
Governing Equations ◽  
Detailed Model ◽  
Salt Deposition ◽  
Transfer Processes ◽  
Mass Transfer Processes

Seawater cooling towers have been used since the 1970’s in power generation and other industries, so as to reduce the consumption of freshwater. The salts in seawater are known to create a number of operational problems including salt deposition, packing blockage, corrosion, and certain environmental impacts from salt drift and blowdown return. In addition, the salinity of seawater affects the thermophysical properties which govern the thermal performance of cooling towers, including vapor pressure, density, specific heat, viscosity, thermal conductivity and surface tension. In this paper, the thermal performance of seawater cooling towers is investigated using a detailed model of a counterflow wet cooling tower. The model takes into consideration the coupled heat and mass transfer processes and does not make any of the conventional Merkel approximations. In addition, the model incorporates the most up-to-date seawater properties in the literature. The model governing equations are solved numerically and its validity is checked by data in the literature. Based on the results of the model, a correction factor is obtained which characterizes the degradation of the cooling tower effectiveness when seawater is used.

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