In this study, a horizontal-axis wind turbine based on the first and second laws of thermodynamics in different wind speeds and pitch angles is analyzed. The blade element momentum (BEM) theory coupled by the exergy equations was implemented to model the wind turbine at wind speeds from 6 to 15 m s⁻¹ and three different pitch angles 5°, 10°, and 20°. The aim of this study was to evaluate the effects of metrological variables such as wind speed, temperature, pressure, and relative humidity on the exergy efficiency of the wind turbine in different pitch angles. It is found out that the wind turbine has been affected more by wind speed compared to other metrological parameters and the highest exergy efficiency is 42.8% at wind speed 12 m s⁻¹ and pitch angle 5°. Also, it is shown that the rising of pressure changes and relative humidity decreases the exergy efficiency for all wind speeds and pitch angles. Increasing the relative humidity from 0.001 to 0.015 and pressure changes from 100 to 240 pa can decrease the exergy efficiency 1.76% and 1.26% at the wind speed of 8 m s⁻¹ and pitch angle of 20°, respectively. In contrast, temperature has a positive impact on the exergy efficiency in the same condition and is able to increase the exergy efficiency 2% by changing from 5 to 35 °C at wind speed of 8 m s⁻¹ and the pitch angle of 5°.

在这项研究中，分析了基于在不同风速和桨距角下的热力学第一定律和第二定律的水平轴风力发电机。实施了由火用方程式耦合的叶片元素动量（BEM）理论来对风速为6到15 m s ^-1以及三个不同的俯仰角5°，10°和20°的风力涡轮机进行建模。这项研究的目的是评估诸如风速，温度，压力和相对湿度等计量变量对不同俯仰角下风力涡轮机的火用效率的影响。发现与其他计量参数相比，风轮机受风速的影响更大，风速为12 m s ^-1时，最高的火用效率为42.8％。俯仰角为5°。此外，还表明，压力变化和相对湿度的升高会降低所有风速和俯仰角的火用效率。在8 m s ^-1的风速和20°的俯仰角下，将相对湿度从0.001增加到0.015并将压力变化从100 pa增大到240 pa分别可以将火用效率降低1.76％和1.26％。相比之下，温度在相同条件下对火用效率具有积极影响，并且能够通过在8 m s ^-1的风速和5°的俯仰角下从5改变到35°C，将火用效率提高2％。