机械排风下建筑内公共卫生间NH_(3)污染分布特征研究  

Distribution characteristics of NH_(3) pollution in public toilets of buildings under mechanical exhaust

作　　者：曾雅娴 裴清清[1] ZENG Ya-xian;PEI Qing-qing(College of Civil Engineering Guangzhou University, Guangzhou 510006, China)

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《广州大学学报（自然科学版）》2021年第3期90-94,共5页Journal of Guangzhou University:Natural Science Edition

摘　　要：为了得出公共卫生间内点源氨污染对环境的影响,利用数值模拟方法研究某高校公共卫生间垃圾篓作为连续点源稳定释放污染物氨气的分布特征;运用Fluent软件模拟换气扇排风时公共卫生间内空气龄和氨气浓度分布。结果表明:在y=1.1 m(人员蹲姿高度)、y=1.6 m(人员站立高度)平面上,平均空气龄分别为41 s及46 s;在人体呼吸区域附近的氨气浓度为0.58 mg·m^(-3)和0.65 mg·m^(-3),超出要求室内氨气质量浓度限值0.2 mg·m^(-3)的国家标准。该研究可为公共卫生间NH_(3)污染的有效防治提供理论依据。In order to find out the impact of point source ammonia pollution on the environment in public restrooms,the distribution characteristics of the pollutant ammonia released stably from the garbage basket in public restrooms of a university were studied by numerical simulation method.Fluent software was used to simulate the air age and ammonia concentration distribution in the public toilet when the ventilation fan was exhausted.The results showed that the average air age was 41 s and 46 s on the plane of y=1.1 m(squatting height)and y=1.6 m(standing height).The distribution of ammonia mass fraction near the human breathing area was 0.58 mg·m^(-3) and 0.65 mg·m^(-3),both exceeding the concentration limit of 0.2 mg·m^(-3),required by the national standard.This study can provide a theoretical basis for effective prevention and control of indoor NH_(3) pollution.

关 键 词：公共卫生间 点源 氨气浓度 平均空气龄 数值模拟 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]