Abstract
The wind speed has the greatest influence on the power flow, since it is included in the power equation in the third degree. It is impossible to ignore the presence in the equation of the air density, which is affected by its temperature, pressure and humidity. The air density is most often chosen according to the conditions of the standard atmosphere. The concept of a standard atmosphere varies from source to source and depends on the field of study. (Research purpose) The research purpose is in studying the influence of temperature, pressure and humidity on the power of the wind flow. (Materials and methods) The article presents existing works on the effect of air density on the operation of wind turbines. Authors selected sources that use the parameters available for measurement, for which there is statistical meteorological data. The study uses the temperature, pressure and relative humidity of the air as data with extensive meteorological observations. (Results and discussion) The article considers the influence of each of the factors depending on the levels of the other factors. The temperature change from -40 to +60 degrees Celsius at low pressure gives a deviation spread of 36.43 percent, while at high pressure this spread is 39.42 percent. A similar situation is observed with pressure, the influence of which varies in the range of 6.97-9.96 percent. The most unfavorable combination of factors (high pressure, low temperature and humidity versus low pressure, high temperature and humidity demonstrated an effect of up to 46.39 percent. (Conclusions) Temperature has the greatest impact on air density and power flow, and humidity has almost no effect on air density and power flow. With the most unfavorable combination of factors, the power flow through the wind wheel can decrease almost to one and a half times while maintaining its speed. The influence of air temperature cannot be ignored when calculating the power of the wind flow.
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