居民区地下配电房通风降噪仿真与分析

摘要

In order to control the temperature of residential underground substations reasonably,reduce environ-mental noise caused by mechanical ventilation, calculation of the velocity field is done. With the software AN-SYS13. 0,an residential underground substation in Foshan Hongxiang district is taken as an example to simulate and analyze the velocity field of the main transformer. According to the simulation results,under the normal tem-perature for electrical equipment in the room,optimizing calculation of the ventilation assisted by cable trench, the noise level decreased from 79 dB(A) to 71 dB(A). The model can be modified to simulate and predict the temperature field in substations of the same kind so as to put forward an optimum proposal for noise treatment, and provide more reference for preliminary design.%为了合理控制居民区地下配电房的室内温度，降低机械通风带来的环境噪声，建立了配电房风速场的仿真模型并对其进行分析计算。以佛山鸿翔小区一个位于某住宅楼地下的配电房为例，使用ANSYS13.0软件对其中主要热源———变压器周围的风速场进行仿真分析。结果表明：在保证室内电气设备工作温度的前提下，优化计算通风量，通过电缆沟辅助进行机械排风，使电房噪声由之前的平均79dB( A)降低到71dB( A)。通过修改模型中的相关参数，可用于其它地下配电房温度场的模拟与预测，为设计提供前期参考。