Wind energy is one of the most used clean energy sources in renewable energy, and its renewable and sustainable nature is one of the reasons why it is used for power generation. In the current environment where all countries in the world are facing energy problems, research on wind power generation systems is also increasing. This article aims to study the problem of modeling and controlling wind speed in the wind power generation system of renewable energy power generation. To this end, this article proposes a modeling method for wind power generation systems, which can be used to study the momentum problems in wind power generation and the mechanical torque of the generator. And at the end of the article, related experiments and analysis are designed to explore and compare its operating cost, speed, and wind wheel speed. The experimental results in this paper show that through effective modeling and control of its wind speed, the economic risks in the actual wind power generation system can be controlled, with a maximum reduction of 24%, and the actual operating cost is also reduced by 8.66%, so wind power has high practical value.
The prevalence of byssinosis was studied in two cotton mills by a standardized questionnaire and pulmonary function measurements (forced expiratory volume in 1 second; FEV1). In mill A, the dust level was high (57-159 mg/m3). Among 90 participants, 80 were interviewed twice at an interval of 4 months, and disagreement on actual presence or absence of byssinosis was 7.5 percent. Twenty out of ninety workers had complaints of Monday symptoms and the prevalence was 22.2 percent. In mill B, the dust control (6.8 mg/m3) was relatively good. Among 173 participants from the carding room, two had complaints of Monday symptoms and the prevalence was 1.2 percent. A significant correlation was found between duration of employment and prevalence of byssinosis in mill A. FEV1 was measured in 9 byssinotics, 29 nonbyssinotics, and 30 controls before and after work on Mondays and Wednesdays. A significant decrease of 177 ml on average (7.8%) was found in byssinotics after work on Monday, whereas in nonbyssinotics, the decrease of FEV1 was nonsignificant. In controls, a slight increase in FEV1 after work was observed.
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