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以云南景洪水电站为背景,利用CFD技术研究了各种工况下空气流经坝体廊道后空气温度的变化规律,分析了室外空气温度、空气流速、隧道洞长等因素对坝体廊道换热效应的影响,可知空气流速约为1 m/s时换热效果较好,且夏季室外气温低于35℃时,经1 000 m坝体廊道温降后空气出口温度均能低于28℃,满足水电站厂房通风的设计要求。模拟结果表明,利用坝体廊道本身的蓄能作用对引入空气具有良好的加热或降温效果,对节能降耗、改善水电站厂房环境和提高发电效率具有重要意义。
Taking the Yunnan Jinghong Hydropower Station as a background, the variation law of air temperature after the air flowing through the corridor of corridor under various operating conditions was studied by using CFD technology. The effects of outdoor air temperature, air velocity and length of tunnel on dam body corridor The result shows that when the air velocity is about 1 m / s, the heat transfer effect is better. When the outdoor temperature is lower than 35 ℃ in summer, the air outlet temperature after the temperature drop of 1 000 m dam corridor can be low At 28 ℃, to meet the design requirements of hydropower plant ventilation. The simulation results show that it is of great significance to use the energy storage effect of the corridor itself to introduce air into the air, which is of great significance for saving energy and reducing consumption, improving the plant environment of the hydropower station and improving the power generation efficiency.