Participant. Sub-project for social development of Shanghai Science and Technology Innovation Action Plan, Advisor: Prof. Ke Zhong.
The formation process of sea-land breeze and the dispersion trajectory and accumulation effect of pollutants are studied under different velocities of OBW with the same sea-land temperature difference by employing computational fluid dynamics (CFD).
Participant. General project of National Natural Science Foundation of China, Advisor: Prof. Yanming Kang.
As a frequently occurred phenomenon in the past decade, especially in recent years, hazy weather or haze pollution has become an emergent environmental issue which is highly concerned in many scientific fields in China. Haze pollution not only raises particle concentration indoors during haze episodes by indoor-outdoor air exchange, but also worsens indoor air quality after the episodes due to its time-delay effects. When haze weather passed, the fine particles, which deposited on the walls of ventilation systems and formed dendritic structures, particularly in ducts, would resuspend into the incoming air by flow flushing and other impactions, and then enter into indoor environment. This phenomenon causes a time-dependent delay of indoor haze pollution， i.e.，a relatively long-time pollution duration （with a relatively high concentration） indoors related to the haze episode. However, investigations and analyses are still lack on this problem and similar/corresponding topics.
Participant. General project of National Natural Science Foundation of China, Advisor: Prof. Yanming Kang.
The impact of particulate matter (PM) on indoor air quality (IAQ) has become an important issue in China, whereas the standard for the filtration of PM in building ventilation has not been promulgated up to now. Due to the impacts of particle size distribution (PSD) on the particle removal efficiency of the air filters, and also due to the various characteristics of local PSD across China, it is necessary to analyze the selection of PSD when evaluating particle removal efficiency for practical applications. Although the efficiency of PM (ePMX) for various particle size ranges, proposed in the latest EN ISO 16890 standard, is used to evaluate the actual effect of air filters for building ventilation on the improvement of IAQ, it is inappropriate to be adopted for the cases in China. In the present study, fine particle proportion (PM2.5/PM10) is employed and ambient aerosol distributions across China are analyzed. The measured PSDs at 35 cities are fitted to bimodal distribution. And then the ePMX and class reporting values (CRVs) of three representative filters are calculated. The results indicate that being affected by the characteristics of PSD, the ePMX and CRV differences of the same air filter between different PSD regions can be up to about 20% and 15%, respectively. Therefore, the China PSD regions are divided into five regions and the standardized PSD is determined for each region of the mainland.
PI. Chinese Universities Scientific Fund, Advisor: Huayuan Zhou.
Street canyons are the environment to which urban residents are most frequently exposed, and vehicle emissions in street canyons can seriously threaten residents’ health.
Leader. 9/2021 – 7/2022, Advisor: Prof. Ke Zhong.
Development of Air Curtain Device for particulate matter removal
Leader. 9/2020 – 3/2021, Advisor: Prof. Ke Zhong.
Development of Product Inspection System for Gas-Phase Air Cleaning Device
Leader. 9/2019 – 3/2020, Advisor: Prof. Ke Zhong.
By modeling the waste treatment facility and its surrounding buildings, simulating the flow field and pollutant dispersion processes, and analyzing the results, the emission concentration of the waste treatment facility can be guided.
Participant. 4/2019 – 3/2020, Advisor: Prof. Ke Zhong.
By modeling the Fresh Air Unit, simulating the airflow in the unit and analyzing the results, the internal air ducts can be optimized to reduce resistance and noise.
Participant. 4/2018 – 3/2019, Advisor: Prof. Ke Zhong.
By modeling the Fan Filter Unit (FFU), simulating the airflow in the FFU and analyzing the results, the internal air ducts can be optimized to reduce resistance and noise.