The Effect of Air Parameters on the Evaporation Loss in a Natural Draft Counter-Flow Wet Cooling Tower

Wei Yuan, Fengzhong Sun, Ruqing Liu, Xuehong Chen and Ying Li
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Wei Yuan: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Fengzhong Sun: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Ruqing Liu: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Xuehong Chen: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Ying Li: School of Energy and Power Engineering, Shandong University, Jinan 250061, China

Energies, 2020, vol. 13, issue 23, 1-16

Abstract: The measures to reduce the impact of evaporation loss in a natural draft counter-flow wet cooling tower (NDWCT) have important implications for water conservation and emissions reduction. A mathematical model of evaporation loss in the NDWCT was established by using a modified Merkel method. The NDWCTs in the 300 MW and 600 MW power plant were taken as the research objects. Comparing experimental values with calculated values, the relative error was less than 3%. Then, the effect of air parameters on evaporation loss of NDWCT was analyzed. The results showed that, with the increase of dry bulb temperature, the evaporation heat dissipation and the evaporation loss decreased, while the rate of evaporation loss caused by unit temperature difference increased. The ambient temperature increased by 1 °C and the evaporation loss was reduced by nearly 26.65 t/h. When the relative air humidity increased, the evaporation heat dissipation and evaporation loss decreased, and the rate of evaporation loss caused by unit temperature difference decreased. When relative air humidity increased by 1%, the outlet water temperature rose by about 0.08 °C, and the evaporation loss decreased by about 5.63 t/h.

Keywords: natural transfer; mathematical modeling; Merkel approach; evaporation loss; dry bulb temperature; relative air humidity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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