Dust accumulated fungi in air-conditioning system:Findings based on field and laboratory experiments

作     者：Zhijian Liu Yuzhu Deng Shengyuan Ma Bao-Jie He Guoqing Cao Zhijian Liu;Yuzhu Deng;Shengyuan Ma;Bao-Jie He;Guoqing Cao

作者机构：Department of Power EngineeringNorth China Electric Power UniversityBaodingHebei 071003China Faculty of Built EnvironmentUniversity of New South WalesNSW Sydney2052Australia Institute of Building Environment and EnergyChina Academy of Building ResearchBeijing 100013China 

出 版 物：《Building Simulation》 (建筑模拟（英文）)

年 卷 期：2021年第14卷第3期

页      面：793-811页

核心收录：

学科分类：080705[工学-制冷及低温工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the National Natural Science Foundation of China(No.51708211 No.41977368) 

主　　题：dust accumulated fungi high-throughput sequencing air supply duct duct material orthogonal experiment fungal growth prediction 

摘      要：This study analyzes the growth and reproduction of dust accumulated fungi(DAF)in an air-conditioning system based on field measurement and molecular biology,laboratory experiment and prediction *** field measurement was conducted to collect dust in filter screen,surface cooler and air supply duct of two air handling units(AHUs).The results indicate that dust volume and fungal number in two AHUs generally met the hygienic specification of public buildings,but the cleansing did not fulfil ***-throughput sequencing was conducted,revealing that the dominant fungal species were Alternaria_betae-kenyensis,Cladosporium_delicatulum,Aspergillus_sydowii,Verticillium_*** experiment was conducted to analyze the impact of several factors(*** time,temperature,relative humidity,duct material)and their combination on the DAF *** results indicate that fungal growth increased with time,peaking at 4 days or 5 *** relative humidity or temperature was conducive to fungal *** orthogonal experiment revealed that the condition of“antibacterial composite,22±1℃and 45%-55%RHhad the strongest inhibiting impact on fungal *** model,Gompertz model and square-root model were further developed to predict the fungal growth under different *** results show that the Logistic model had high feasibility and accuracy,the Gompertz model was feasible with lower accuracy and the square-root model was feasible with high ***,this study facilitates the understanding of the DAF growth in air-conditioning ducts,which is important for real-time prediction and timely control of the fungal contamination.