Impact of Weather Conditions on the Operation of Power Unit Cooling Towers 905 MWe
| Autor: | Janusz Pospolita, Anna Kuczuk, Katarzyna Widera, Zbigniew Buryn, Rafał Smejda |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Control and Optimization Power station Renewable Energy Sustainability and the Environment Wet-bulb temperature cooling tower power plant MathematicsofComputing_GENERAL Energy Engineering and Power Technology Humidity Atmospheric sciences ambient conditions water loss TheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGES Heat exchanger Water cooling Environmental science Relative humidity Cooling tower Electrical and Electronic Engineering Engineering (miscellaneous) Condenser (heat transfer) Energy (miscellaneous) |
| Zdroj: | Energies, Vol 14, Iss 6412, p 6412 (2021) Energies; Volume 14; Issue 19; Pages: 6412 |
| ISSN: | 1996-1073 |
| Popis: | 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 Tamb air by 5 °C (from 20–22 °C to 25–27 °C) causes an increase in temperature at the outlet of the cooling tower by 3–4 °C. The influence of air temperature and humidity on the level of water cooling ΔTw and cooling efficiency ε were also found. In the case of ΔTw, the effect is in the order of 0.1–0.2 °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 MWe, the evaporated water stream m˙ev, depending on the environmental conditions, increases from 400–600 tons/h to the value of 1000–1400 tons/h. It was determined that in the case of the average power of the unit at the level of 576.6 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. |
| Databáze: | OpenAIRE |
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