水电站尾调室湿环境控制方案对比分析

Comparison and Analysis of Wet Environment Control Scheme for Tailwater Surge Chamber of a Hydropower Station

尾调室作为水电站的重要组成部分,其热湿环境影响水电站的安全稳定运行。实际工程中发现,尾调室内起雾与冷凝现象严重,内部设备运行和工作人员健康受到影响。本文根据XLD水电站尾调室的实际情况,提出机械通风、冷却除湿、冷却除湿+机械通风3种湿度控制方案,并通过数值模拟的方法比较3种方案在夏季最不利条件下对湿环境的控制效果,寻找尾调室湿度控制的最优方案。结果表明:机械通风方案不能有效解决尾调室湿度过高的问题,端部及底部空气多处呈饱和状态;冷却除湿方案能起到一定除湿效果,但存在风流分布不均匀的现象,中部和端部相对湿度仍不满足要求;冷却除湿+机械通风方案能够使尾调室工作区湿度降至80%以下,室内空气温湿度分布较为均匀。

As an important part of hydropower station,the thermal and humid environment of tailwater surge chamber affects the safe and stable operation of hydropower station.In the actual project,it is found that the fog and condensation in the tail control room are serious,and the operation of internal equipment and the health of staff are affected.According to the actual situation of the tailwater surge chamber of XLD hydropower Station,three humidity control schemes:mechanical ventilation,cooling dehumidification and cooling dehumidification and mechanical ventilation are proposed,and compares the control effects of the three schemes under the most unfavorable conditions in summer through numerical simulation,so as to find the optimal scheme for the humidity control of the tailwater surge chamber.The simulation results show that the mechanical ventilation scheme can not effectively solve the problem of high humidity in the tail chamber,and the air at the end and bottom of the chamber is saturated in many places.The cooling dehumidification scheme can play a certain dehumidification effect,but the air flow distribution is not uniform,the relative humidity of the middle and end still does not meet the requirements.The cooling dehumidification and mechanical ventilation scheme can reduce the humidity of the tail adjustment room working area to less than 80%,and ensure that the indoor air temperature and humidity distribution is more uniform.