Thermal Performance Evaluation of Seawater Cooling Towers

Sharqawy, Mostafa H.; Husain, Iqbal; Zubair, Syed M.; Lienhard, John H.

doi:10.1115/imece2011-62977

Cited by 8 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As no experimental data were found for packed bed humidifiers in the operating range of typical HDH systems, the humidifier model implementation was benchmarked against data from cooling towers. Predicted outlet drybulb, wetbulb, and water temperatures were compared to experimental cooling tower data presented by Sharqawy and Husain [27,28]. As shown in Table 2, the results from the present work agree within 0.5 • C of the experimental values.…”

Section: Validationsupporting

confidence: 77%

Effect of mass extractions and injections on the performance of a fixed-size humidification–dehumidification desalination system

et al. 2013

Self Cite

View full text Add to dashboard Cite

The impact of mass extractions and injections as a method for increasing the energetic performance of fixed-size humidification-dehumidification desalination systems is examined. Whereas previous studies of this problem have been restricted to thermodynamic models, the use of a more complete model that includes transport provides the ability to quantify the impact of mass extractions/injections on a realizable, fixed-size system. For a closed air, open water cycle, the results show that a single water extraction from the dehumidifier to the humidifier increases the gained output ratio by up to 10%, with extractions higher in the cycle proving more effective. The sizing problem for the humidifier and dehumidifier under thermodynamically optimized conditions found in literature is also discussed, as is the impact of system size on overall performance of a system without extractions/injections. For a range of sizes, it is shown that a rough doubling of both dehumidifier and humidifier size results in a two-to three-fold increase in gained output ratio, with diminishing returns as the absolute sizes increase.

show abstract

Section: Validationsupporting

confidence: 77%

Effect of mass extractions and injections on the performance of a fixed-size humidification–dehumidification desalination system

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…Consequently, there is comparatively little research, using the exergy analysis method, to evaluate seawater cooling tower thermal performance. Sharqawy et al [14,15] studied the effect of salinity on air and water effectiveness by developing a numerical model for seawater cooling towers. They formulated a correction factor equation representing the effectiveness of seawater and freshwater cooling towers under the same operating conditions and tower specifications.…”

Section: Introductionmentioning

confidence: 99%

Heat and mass transfer performance and exergy performance evaluation of seawater cooling tower considering different inlet parameters

Hou

et al. 2022

THERM SCI

View full text Add to dashboard Cite

Cooling towers are important components within recirculating cooling water systems. Due to a shortage of freshwater resources, seawater cooling towers are widely used both in manufacturing and everyday life. This paper researches the mechanical draft counterflow wet seawater cooling tower (MDCWSCT), and establishes and verifies a detailed thermal performance calculation model. Referring to the second law of thermodynamics, the heat and mass transfer performance and exergy performance of the seawater cooling tower were studied. The effects of salinity, inlet air speed, and air wet-bulb temperature on the cooling efficiency, thermal efficiency, and exergy efficiency were analyzed. The results show that compared to the air wet-bulb temperature, changes in air speed have more influence on cooling and thermal efficiency under the study conditions. Moreover, the air wet-bulb temperature is the significant parameter affecting exergy efficiency. With an increase in salinity, the cooling, thermal, and exergy efficiency are about 2.40-8.25 %, 1.06-3.09 %, and 2.47-7.73 % lower than that of freshwater, respectively, within an air speed of 3.1-3.6 m/s. With an increase in salinity, the cooling, thermal, and exergy efficiency are about 2.28-8.47 %, 1.03-3.37 %, and 2.44-7.99 % lower than that of freshwater, respectively, within an air wet-bulb temperature of 25-27 ?. Through the exergy analysis of the seawater cooling tower, it is obvious that the heat and mass transfer performance and exergy performance can be improved by selecting the optimum operating conditions and appropriate packing specifications.

show abstract

“…They obtained the empirical correlations of thermal and resistance performance, providing a reference for the design of seawater cooling tower. Sharqawy et al 21,22 proposed a correction equation for the seawater cooling tower's thermal efficiency. Furthermore, they studied the seawater salinity influence on thermal efficiency through experimental and theoretical research.…”

Section: Introductionmentioning

confidence: 99%

Parametric study of heat/mass transfer performance of seawater–air two‐phase counterflow in packing in seawater cooling towers

Hou

et al. 2022

Heat Trans

View full text Add to dashboard Cite

A large amount of waste heat generated in industrial production needs to be discharged by circulating cooling water systems. To save freshwater resources, freshwater cooling towers have been widely replaced by seawater cooling towers in coastal areas, but research on the thermal performance of seawater cooling towers is still relatively less. In this study, a detailed calculation model based on the heat/mass transfer process of seawater-air two-phase counterflow was established, and the reliability of the proposed model was verified. The computer program developed under the VC++ framework was used for the numerical solution of the model. The effects of five inlet parameters on the cooling efficiency and heat dissipation were studied. The simulation resultsshowed that with the increase of salinity, the cooling performance was reduced. When the salinity increased by 10 g/kg, the outlet water temperature rose by about 0.13°C. The wet-bulb temperature increased by 1°C and the cooling efficiency increased by about 0.77%, while total heat dissipation was reduced by about 36.37 kW. When the air-water ratio increased, the cooling performance was improved, but the maximum cooling efficiency was affected by heat load. The change of dry-bulb temperature had little effect on the cooling performance. With the increase of water temperature, the cooling efficiency and heat dissipation increased. The calculation model and simulation results can provide practical guidance for the operation of seawater cooling towers.

show abstract

Thermal Performance Evaluation of Seawater Cooling Towers

Cited by 8 publications

References 4 publications

Effect of mass extractions and injections on the performance of a fixed-size humidification–dehumidification desalination system

Effect of mass extractions and injections on the performance of a fixed-size humidification–dehumidification desalination system

Heat and mass transfer performance and exergy performance evaluation of seawater cooling tower considering different inlet parameters

Parametric study of heat/mass transfer performance of seawater–air two‐phase counterflow in packing in seawater cooling towers

Contact Info

Product

Resources

About