水电能源科学

为了改善抽水蓄能电站地下厂房施工期工作面环境，基于射流理论、负压通风理论和柱状涡旋原理，针对浙江省天台抽水蓄能电站地下厂房工程建立了湍流κ-ε数学模型，模拟并对比了正压通风、负压通风及涡旋通风系统的通风效果，评估了3种通风系统在地下厂房中的除尘性能。结果表明，在正压通风和负压通风条件下，厂房内粉尘浓度下降至4 mg/m³所需时间均超过30 min,正压通风系统除尘率为91.1%,负压通风系统除尘率为93.6%。相较之，涡旋通风系统下厂房内粉尘浓度降至4 mg/m³仅需10 min,除尘率可达98.7%。涡旋通风系统在地下厂房中的应用显著优于正压通风和负压通风系统，能够在更短的时间内有效降低粉尘浓度，提升施工环境的空气质量，改善工作环境，提高施工效率。

To enhance the working environment during the construction phase of the underground powerhouse of Tiantai pumped storage power station of Zhejiang Province, based on the jet theory, negative pressure ventilation theory and the principle of cylindrical vortex, this study establishes a turbulent κ-ε mathematical model specifically for this project. The ventilation effects of positive pressure ventilation, negative pressure ventilation, and vortex ventilation systems are simulated to assess their dust removal performance in the underground powerhouse. The results show that under both positive and negative pressure ventilation conditions, it takes over 30 minutes for the dust concentration inside the powerhouse to decrease to 4 mg/m³. Specifically, the dust removal rate of the positive pressure ventilation system stands at 91.1%, while that of the negative pressure ventilation system is 93.6%. In contrast, vortex ventilation system reduces the dust concentration to 4 mg/m³ in just 10 minutes, boasting a dust removal rate of 98.7%. The vortex ventilation system significantly outperforms positive and negative pressure ventilation systems in underground powerhouses. It effectively lowers dust concentration in a shorter timeframe, elevates the air quality of the construction environment, ameliorates the working conditions, and enhances construction efficiency.