Impact of Weather Conditions on the Operation of Power Unit Cooling Towers 905 MWe

Energies

Katarzyna Widera¹  Janusz Pospolita²  Anna Kuczuk²  Zbigniew Buryn³  Rafał Smejda⁴ 

[1] Faculty of Economics and Management, Opole University of Technology, Prószkowska 76, 45-758 Opole, Poland;Faculty of Mechanical Engineering, Opole University of Technology, Prószkowska 76, 45-758 Opole, Poland;Faculty of Production Engineering and Logistics, Opole University of Technology, Prószkowska 76, 45-758 Opole, Poland;PGE GIK S.A. Branch Opole Power Plant, Brzezie k., 46-021 Opola, Poland;

关键词: cooling tower;    ambient conditions;    water loss;    power plant;   

DOI  :  10.3390/en14196412

来源: DOAJ

【 摘 要 】

The paper presents the results of measurements and calculations concerning the influence of weather conditions on the operation of wet cooling towers of 905 MWe units of the Opole Power Plant (Poland). The research concerned the influence of temperature and relative humidity of air, wind and power unit load on the water temperature at the outlet from the cooling tower, the level of water cooling, cooling efficiency and cooling water losses. In the cooling water loss, the evaporation loss stream and the drift loss stream were distinguished. In the analyzed operating conditions of the power unit, for example, an increase in $T_{amb}$ air by 5 °C (from $20–22°\mathrm{C}$ to $25–27°\mathrm{C}$) causes an increase in temperature at the outlet of the cooling tower by $3–4°\mathrm{C}$. The influence of air temperature and humidity on the level of water cooling $\mathsf{\Delta }{T}_w$ and cooling efficiency $\epsilon$ were also found. In the case of $\mathsf{\Delta }{T}_w$, the effect is in the order of $0.1–0.2°\mathrm{C}$ and results from the change in cooling water temperature and the heat exchange in the condenser. The ε value is influenced by air temperature and humidity, which determine the wet bulb temperature value. Within the range of power changes of the unit from $400$ to $900\mathrm{MWe}$, the evaporated water stream ${\dot{m}}_{ev}$, depending on the environmental conditions, increases from $400–600\mathrm{tons}/\mathrm{h}$ to the value of $1000–1400\mathrm{tons}/\mathrm{h}$. It was determined that in the case of the average power of the unit at the level of $576.6\mathrm{MWe}$, the average values of the evaporation and drift streams were respectively $0.78\%$ and $0.15\%$ of the cooling water stream. Using statistical methods, it was found that the influence of wind on the level of water cooling, cooling efficiency and cooling water losses was statistically significant.

【 授权许可】

Unknown