长沙市大型公共建筑集中空调通风系统污染调查

Investigation on Contamination Situation of Air-conditioning Systems in Large Public Buildings in Changsha

管理不善的集中空调通风系统已成为建筑室内空气污染的主要源头之一。为了更有效地控制室内空气污染,本文对长沙市15栋大型公共建筑的集中空调通风系统夏季污染状况进行了调查。结果显示:送风中PM10、细菌总数、真菌总数超标率分别为76%、61%和52%;风管内表面积尘量、积尘中细菌总数和真菌总数超标率分别为55%、45%和34%;室内PM10、细菌总数和真菌总数超标率分别为26%、31%和20%。此外,在2栋建筑的空调系统冷却水中检出了嗜肺军团菌。由调查结果可知,长沙市大型公共建筑的集中空调通风系统和建筑室内都存在较为严重的污染。

The air-conditioning system with bad management has become a main reason for building indoor air pollution.In this paper,the contamination situation of air-conditioning systems in 15 large public buildings in Changsha was investigated.The results demonstrated that rates excess the standard for PM10,the total count of bacterial and fungi on the supply air were 76%,61% and 52%,respectively.The rates excess the standard for the collected dust weight,the total count of bacterial and fungi on the duct inner surface were 45%,34% and 26%,respectively.Furthermore,the rates excess the standard for PM10,the total count of bacterial and fungi in relevant rooms were 26%,31% and 20%,respectively.Besides,the legionella bacteria were detected in two air-conditioning systems.It was concluded that there were serious contamination in air-conditioning systems in large public buildings in Changsha.