北京某既有办公建筑新风系统改造效果分析

Effect Analysis of Fresh Air System Improvement in Existing Office Building

本文针对北京地区某既有办公建筑的新风系统改造效果进行了分析。根据所在气候区对新风换气设备及过滤器等级进行选型,根据现场情况采用一种较为灵活的设计方案,避免空间和阻力的限制;并采用CFD数值模拟辅助手段确定所需新风量。同时,为该建筑设置智能监测和控制系统,检验系统运行效果。于污染较严重的某日,采用专业检测设备对系统进行检测,结果表明该设计方案和手段可以有效去除室内PM2.5,实现室内良好的空气质量。

This paper is a summary of fresh air system improvement in existing office building in Beijing. It selected appropriate air handling equipment and filter rating that comply with the characteristics of the elimatic region.According to the actual situation, a flexible design scheme was used to avoid space constraints and resistance limit. The fresh air quantity was determined by using CFD numerical simulation. An intelligent monitoring and controlsystem was set in the building to check the operation effect of the system. In one day with high level of pollution, indoor air pollution concentration was tested with professional testing equipment. The results show that the designscheme and the proposed method can remove indoor PM2.5 effectively to achieve good indoor air quality.