Study on the kinetic characteristics of indoor air pollutants removal by ventilation

Zhang, Tianhu; Zhang, Yuxin; Li, Aoqi; Gao, Yi; Rao, Yandi; Zhao, Qingxin

doi:10.1016/j.buildenv.2021.108535

Cited by 13 publications

(4 citation statements)

References 43 publications

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Section: Evaluation Indicesmentioning

confidence: 99%

“…Good indoor air distribution is demonstrated by the fact that the air temperature difference in the vertical direction will not be too large, the airflow rate will be kept within a reasonable range, and the waste heat and pollutants generated indoors can be effectively eliminated. Therefore, the vertical air temperature difference [55], turbulence intensity [56], contaminant removal effectiveness [57] and heat removal effectiveness [56] were selected to evaluate the indoor air distribution characteristics and the air diffusion performance index [58] was selected to investigate the proportion of temperature and velocity measuring points that meet the requirements. These evaluation indices can be seen in Equations ( 1)- (6).…”

Section: Evaluation Indicesmentioning

confidence: 99%

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Experimental Study of Indoor Air Distribution and Thermal Environment in a Ceiling Cooling Room with Mixing Ventilation, Underfloor Air Distribution and Stratum Ventilation

Wu,

Gao,

Zhao

et al. 2023

Buildings

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A ceiling cooling system integrated with a mechanical ventilation system has been widely used in modern buildings with large sensible cooling loads due to the high thermal comfort level and large energy efficiency. However, there is a lack of systematic research on the influence factors such as ceiling surface temperature and cooling load on the indoor air distribution and thermal environment, and the impact of ventilation system type in the ceiling cooling room is still unclear. Therefore, this paper presented an experimental study of indoor air distribution and thermal environment in a ceiling cooling (CC) room with mixing ventilation (MV), underfloor air distribution (UFAD) and stratum ventilation (SV); the ceiling surface temperature was 17 °C–26 °C and the internal or external cooling load was 41.5 W/m2–69.5 W/m2. The results showed that the vertical air temperature difference and contaminant removal effectiveness were 0.2 °C–0.4 °C and 0.53–0.85 with CC + MV, 0 °C–1.2 °C and 0.68–1.25 with CC + UFAD and 0.3 °C–0.9 °C and 0.50–0.83 with CC + SV, and the corresponding heat removal effectiveness and air diffusion performance index were 0.96–1.11 and 96–100%, 0.9–1.5 and 57–100% and 1.11–1.34 and 71–100%, respectively. Moreover, the difference between mean radiant temperature and air temperature and the predicted mean vote of thermal sensation were from 0 °C to 0.9 °C and between 0 and 0.26 with CC + MV, from −0.1 °C to 2.2 °C and between −0.1 and 0.42 with CC + UFAD and from −0.1 °C to 0.9 °C and between −0.2 and 0.13 with CC + SV. Hence, the ventilation system type clearly affected the indoor air distribution and thermal environment in the ceiling cooling room, and the experimental results would be beneficial for the design and control of a ceiling cooling system combined with a mechanical ventilation system in practice.

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Section: Evaluation Indicesmentioning

confidence: 99%

Section: Evaluation Indicesmentioning

confidence: 99%

Experimental Study of Indoor Air Distribution and Thermal Environment in a Ceiling Cooling Room with Mixing Ventilation, Underfloor Air Distribution and Stratum Ventilation

Wu,

Gao,

Zhao

et al. 2023

Buildings

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“…The effects of indoor air pollution on human health and comfort are attracting increased attention, as people now spend up to 90% of their time indoors [1]. Among the primary indoor air pollutants, the significance of volatile organic compounds (VOCs) is well established [2]. Formaldehyde (FA) is a critical target VOC for removal due to its carcinogenic properties and ubiquity in indoor air [3].…”

Section: Introductionmentioning

confidence: 99%

A platinum ensemble catalyst for room-temperature removal of formaldehyde in the air

Vikrant,

Chung,

Boukhvalov

et al. 2023

Chemical Engineering Journal

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“…When building new or renovating existing buildings around stations, the intensive nature of rail transit stations can be fully exploited and combined with the TOD urban development model to create green, convenient and comfortable living spaces around rail transit stations [6][7][8][9]. In order to explore the impact of the building layout around rail transit stations on carbon emissions, this paper adopts different strategies to classify the distribution patterns of buildings around rail transit stations with reference to 5G network traffic analysis methods, and establishes corresponding multi-modal mathematical models to calculate the carbon emissions of connecting to rail transit under different building distribution patterns.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Low-Carbon Layout of Land around Rail Transit Stations Based on Multi-Modal Spatial Data

et al. 2023

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With the ever-increasing demand for transport in modern cities, emissions from urban transport are rising. The proportion of carbon emissions in exhaust gas accounts for a large share of society’s total carbon emissions and is increasing. Therefore, urban transport has a sustainable responsibility to reduce carbon emissions. Investigating the factors that influence carbon emissions from transport has become an important practical issue that needs to be addressed. This paper adopts a “bottom-up” theoretical calculation method of transport carbon emissions and establishes the basic distribution model of inter-modal land use around rail transit stations. It clarifies the connection mode of rail transit stations and establishes the distribution model of carbon emission of stations under different building distribution modes, suggesting the planning of building distribution patterns around rail transit stations. This paper proposes a new method to analyze the influencing factors of carbon emissions at rail transit stations based on multi-modal spatial data in order to make full use of the dense characteristics of rail transit stations and reduce carbon emissions.

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Study on the kinetic characteristics of indoor air pollutants removal by ventilation

Cited by 13 publications

References 43 publications

Experimental Study of Indoor Air Distribution and Thermal Environment in a Ceiling Cooling Room with Mixing Ventilation, Underfloor Air Distribution and Stratum Ventilation

Experimental Study of Indoor Air Distribution and Thermal Environment in a Ceiling Cooling Room with Mixing Ventilation, Underfloor Air Distribution and Stratum Ventilation

A platinum ensemble catalyst for room-temperature removal of formaldehyde in the air

Sustainable Low-Carbon Layout of Land around Rail Transit Stations Based on Multi-Modal Spatial Data

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