广州地铁车站公共场所集中空调通风系统卫生影响因素分析

王芳; 赵丽; 于莹莹; 王育珩; 杨裕祯

广州地铁车站公共场所集中空调通风系统卫生影响因素分析

Factors Influencing Air Quality in Public Spaces of Guangzhou Metro Station

摘要

摘要:
目的了解地铁车站公共场所集中空调通风系统卫生状况, 分析其主要影响因素, 为地铁空调通风系统的设计与运营管理提供依据和建议。
方法 2011-2012年对广州市3条线路的地铁车站公共场所集中空调通风系统进行调查与检测, 分析影响空调送风的因素。
结果 3条线路集中空调风管内表面积尘量和积尘微生物, 新风量和冷却水、冷凝水合格率均为100%。送风细菌总数合格率为87.3%, 真菌总数合格率为78.0%, 送风PM₁₀指标合格率为49.4%。空调送风口真菌总数与隧道区间风真菌总数呈正相关(r=0.707, P=0.033, P < 0.05);送风口PM₁₀与新风井(r=0.872, P=0.002, P < 0.01)、隧道区间(r=0.856, P=0.003, P < 0.01) 和站台呼吸带(r=0.966, P < 0.001) PM₁₀的浓度呈正相关。
结论车站空调送风的污染物, 来自于新风井的室外新风和隧道风漏入, 环境可吸入颗粒物的本底水平较高, 使得空调送风PM₁₀亦较高。

Abstract:
Objectives To investigate the sanitary condition of central air conditioning system in the public space of subway stations and analyze its influencing factors, to provide suggestions for their design and management.
Methods Central air conditioning systems in three lines of Guangzhou metro station were monitored in 2011-2012, and their influencing factors were analyzed.
Results The weight and microbe in the dust collected from inner surface of ducts, fresh air, cooling water, and condensate of central air conditioning systems in these 3 lines were all qualified. The qualified rate for bacteria, fungi and PM₁₀ in air supplier was 87.3%, 78.0% and 49.4%, respectively. There were positive relations on the number of fungi between the outlet of air supplier and tunnels (r=0.707, P=0.033, P < 0.05); and positive relations on the concentration of PM₁₀ between air supplier outlet and new air shaft (r=0.872, P=0.002, P < 0.01), tunnel (r=0.856, P=0.003, P < 0.01), and breathing zone in platform (r=0.966, P < 0.001).
Conclusions The pollutant in air conditioning systems was probably from outdoor air and tunnel wind.High concentration of PM₁₀ might be the result from high background level of inhalable particulate matter.

HTML全文

参考文献(8)

施引文献

资源附件(0)