Study on the transmission route of virus aerosol particles and control technology of air conditioning in the enclosed space

Cao, Weixue; Sun, Bo; Zhao, Yongxiang; Shi, Quanbin; Wang, Yonghzen

doi:10.1140/epjp/s13360-021-02058-8

Cited by 9 publications

(4 citation statements)

References 21 publications

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“…Therefore, RNG K -ε turbulence model is selected in this paper. RANS performs numerical calculations by solving a series of differential equations, where differential equations can be abbreviated as one of the following forms [10][11][12] :…”

Section: Mathematical Modelmentioning

confidence: 99%

Comparative study on ventilation and air conditioning system schemes based on virus pollution control in hospital infusion room

Cao,

Zhang,

Yao

et al. 2023

Aerobiologia

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Covid-19 is transmitted through droplets containing the virus and very small particles exhaled by infected people. These droplets and particles may be inhaled by others, or fall into their eyes, mouth and nose. In some cases, they may contaminate the contact surface. It is most likely to be infected if they are less than 1m away from the infected person. To evaluate the effects of different air conditioning systems on the spread of human exhaled pollutants, computational uid dynamics (CFD) was used to study the movement and diffusion of exhaled air from two rows of 12 sitting adults in a hospital's closed transfusion room. In this paper, a closed transfusion room with 12 human models was established rstly, and the mathematical model veri ed by experimental test results was used to study the propagation of viral aerosol particles in the enclosed space under different air conditioning systems. The result showed that when the transverse strong air ow is generated in the room, the concentration distribution of virus particles will show a roll like distribution, and the personnel inside the roll will cause new infection. The air ow generated by the air conditioning system will affect the dispersion of droplets in the air. Evaluating and guiding the air ow to avoid blowing air from one person to another may reduce the risk. Article Highlights1. The air conditioning system inside the enclosed space can reduce the risk of virus cross infection.2. New infections can be triggered by strong lateral air ow generated by indoor air conditioning systems.3. Setting the air ow reasonably to avoid blowing air from one person to another may reduce the risk.

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Section: Mathematical Modelmentioning

confidence: 99%

Comparative study on ventilation and air conditioning system schemes based on virus pollution control in hospital infusion room

Cao,

Zhang,

Yao

et al. 2023

Aerobiologia

Self Cite

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“…The method of power load fluctuation indicators is an important tool for scientifically understanding power load, grasping the relationship between load fluctuation characteristics and their influencing factors, and conducting highprecision prediction of power load characteristics 3,4 When making major decisions such as load characteristic prediction, power grid planning, and peak shaving, the most fundamental is to use electrical load characteristic indicators to analyze the characteristics of electrical load fluctuations, in order to accurately grasp the law of power grid load fluctuations, analyze the wave law of load characteristic indicators, and the internal correlation between indicators 5,6 . This is not only of great significance for the development and decision-making of the power grid; moreover, it can provide a reference basis for the construction and modification of power supply facilities in the region 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on electrical load of single building based on time-frequency domain coupling characteristics

Zhai,

Tian,

Zhu

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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The electrical load characteristics of office, shopping mall, and hotel buildings in different seasons were experimental studied in this article by using daily load characteristics indicators firstly. Then, the annual load curves and characteristic indicators of various types of buildings were also analyzed and compared. The results showed that the load rate of shopping malls is around 0.52, while the load rate of office buildings is approximately 0.61~0.73. So from the perspective of time domain indicators, the volatility of shopping malls is slightly higher than that of office buildings. The peak to valley ratio of shopping mall buildings reaches 0.88 or above, while that of office buildings ranges from 0.51 to 0.76. The weekly imbalance coefficient of the hotel building this week is 0.93, and there is a small difference in the maximum electrical load between the working and rest days of the hotel building. It can also be seen there is a small difference in the maximum load between the working and rest days.

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“…However, different power system regulation services have different regulation performance requirements for flexible load resources, so it is necessary to characterize the regulation characteristics of flexible load group [8]. It is necessary to focus on the aggregation regulation capacity, maximum aggregation charge / discharge power, charging time and time range, conversion efficiency, maximum daily charge / discharge times, aggregation power regulation rate, benchmark charge / discharge power, etc [9].…”

Section: Introductionmentioning

confidence: 99%

Research on adjustable power calculation model of flexible electrical load of building air conditioning

Bai

Huang³

et al. 2023

Eighth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2022)

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With the promotion of China's power substitution strategy, the national power load has increased year by year, but at the same time, the annual duration of peak load is extremely low, which brings major challenges to the safe and economic operation of the power system. By constructing a typical flexible load aggregate adjustable power calculation model, this paper carries out the flexible load group adjustable power calculation and characteristic characterization from the equipment level. The working mechanism and power regulation mode of typical flexible load of air conditioning are studied, and an orderly temperature control regulation method of constant frequency refrigeration air conditioning load group is proposed. It is found that the outdoor temperature and average power show an approximate linear relationship. For every 1℃ increases in outdoor temperature, the average power increases by 5% of the rated power; Synchronous regulation of temperature control load group will cause disorderly fluctuation of aggregate adjustable power due to various initial states. The power fluctuation rate of air conditioning load group can be reduced by 87% through the orderly temperature control regulation method.

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Study on the transmission route of virus aerosol particles and control technology of air conditioning in the enclosed space

Cited by 9 publications

References 21 publications

Comparative study on ventilation and air conditioning system schemes based on virus pollution control in hospital infusion room

Comparative study on ventilation and air conditioning system schemes based on virus pollution control in hospital infusion room

Experimental study on electrical load of single building based on time-frequency domain coupling characteristics

Research on adjustable power calculation model of flexible electrical load of building air conditioning

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