A novel control system for nitrogen dioxide removal and energy saving from an underground subway stations

Son, Youn-Suk; Jeong, Jin-Ho; Lee, Hyung Joo; Kim, Jo-Chun

doi:10.1016/j.jclepro.2016.05.116

Cited by 11 publications

(2 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, HVAC systems for new subways are equipped with electrostatic purification devices in air-conditioning units or windpipes, which can effectively reduce PM concentrations and remove organic pollutants, bacteria, and microbes through physical separations [229][230][231]. Apart from magnetic filters and electrostatic purification devices, there are many applicable purification technologies to specific pollutants: (1) fiber filtration to PMs, microbes, and radon, (2) activated carbon to PMs, NO 2 , and VOCs, (3) photocatalysts to VOCs and microbes, (4) negative ion to PMs, bacteria, and fungi, (5) ultraviolet to bacteria and fungi, and (6) plasma to PMs, VOCs, bacteria, and viruses [228,231,232]. However, these air purification technologies may cause other pollution problems such as ozone, nitrogen oxides, and other harmful gases produced in the process of electrostatic disinfection [229].…”

Section: Mitigation Measuresmentioning

confidence: 99%

Environmental and Health Effects of Ventilation in Subway Stations: A Literature Review

Wen

Leng

Shen

et al. 2020

IJERPH

View full text Add to dashboard Cite

Environmental health in subway stations, a typical type of urban underground space, is becoming increasingly important. Ventilation is the principal measure for optimizing the complex physical environment in a subway station. This paper narratively reviews the environmental and health effects of subway ventilation and discusses the relevant engineering, environmental, and medical aspects in combination. Ventilation exerts a notable dual effect on environmental health in a subway station. On the one hand, ventilation controls temperature, humidity, and indoor air quality to ensure human comfort and health. On the other hand, ventilation also carries the potential risks of spreading air pollutants or fire smoke through the complex wind environment as well as produces continuous noise. Assessment and management of health risks associated with subway ventilation is essential to attain a healthy subway environment. This, however, requires exposure, threshold data, and thereby necessitates more research into long-term effects, and toxicity as well as epidemiological studies. Additionally, more research is needed to further examine the design and maintenance of ventilation systems. An understanding of the pathogenic mechanisms and aerodynamic characteristics of various pollutants can help formulate ventilation strategies to reduce pollutant concentrations. Moreover, current comprehensive underground space development affords a possibility for creating flexible spaces that optimize ventilation efficiency, acoustic comfort, and space perception.

show abstract

Section: Mitigation Measuresmentioning

confidence: 99%

Environmental and Health Effects of Ventilation in Subway Stations: A Literature Review

Wen

Leng

Shen

et al. 2020

IJERPH

View full text Add to dashboard Cite

show abstract

“…Studies on the removal from the air supply of not only PM but NO 2 and VOCs have been carried out. 12,81 Among these studies, various active carbon methods have been performed. Son et al 81 introduced a technology for controlling NO 2 concentration in the underground platform to <50 ppb (which is the indoor air quality standard for multi-use facilities in Korea) and reducing energy consumption by using hybrid-activated carbon and an automatic control system.…”

Section: Hybrid Filtermentioning

confidence: 99%

A review of traditional and advanced technologies for the removal of particulate matter in subway systems

Park¹,

Son

Kim

2019

Indoor Air

View full text Add to dashboard Cite

The pollution status of particulate matter (PM) in a subway system and technological trends in their reduction were discussed in this study. The levels of PM2.5 and PM10 are generally found to be higher in the underground platforms and tunnels than those in the outdoor air. It has also been reported that the composition of fine dust in the subway consists of various substances including heavy metals (like Fe), carbonaceous matter, and solvent extractable organic matter (SEOM). It was confirmed that subway dust was created mainly by wearing on wheels, rails, and brakes. In addition, the concentration of PM in such environment was influenced not only by internal factors (eg, operating conditions of trains and ventilation systems, number of passengers, and the structure of subway stations) but also by outside factors (eg, ambient air concentration). Up to now, various techniques (ventilation fans, platform screen doors (PSDs), magnetic filters, small jet fans, artificial intelligent ventilation systems, hybrid filters, etc) have been studied to reduce PM in underground subway systems. In this study, we reviewed the air quality of major subway stations with the focus on PM and relevant technologies for its reduction.

show abstract

Imputing missing indoor air quality data via variational convolutional autoencoders: Implications for ventilation management of subway metro systems

Loy-Benitez

Heo

2020

Building and Environment

View full text Add to dashboard Cite

A novel control system for nitrogen dioxide removal and energy saving from an underground subway stations

Cited by 11 publications

References 47 publications

Environmental and Health Effects of Ventilation in Subway Stations: A Literature Review

Environmental and Health Effects of Ventilation in Subway Stations: A Literature Review

A review of traditional and advanced technologies for the removal of particulate matter in subway systems

Imputing missing indoor air quality data via variational convolutional autoencoders: Implications for ventilation management of subway metro systems

Contact Info

Product

Resources

About