Energy performance investigation of an innovative environmental control system in subway station

Zhang, Huan; Cui, Tong; Liu, Minzhang; Zheng, Wandong; Zhu, Chunguang; You, Shijun; Zhang, Yazhou

doi:10.1016/j.buildenv.2017.09.023

Cited by 57 publications

(20 citation statements)

References 22 publications

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“…High ventilation rates and frequent facility utilizations require ventilation systems to keep their cleanliness and efficiency to ensure abundant clean air entering subways. Furthermore, some recent energy-saving studies propose to utilize piston winds through train movement [241][242][243][244] and buoyancy-driven airflows through hot pressing [245], which make wind environments and pollutant transmissions more complicated. Spaces and airflows in subways are so complex that they cannot merely introduce fresh air to dilute and then exhaust air outside.…”

Section: Wind Environmentmentioning

confidence: 99%

“…With controllable vents open in non-air-conditioning seasons, these systems operate as platform bailout door (PBD) systems and take full use of piston effects to ventilate and remove wasted heat from stations [244,283]. Meanwhile, PSDs prevent objects or passengers from falling off platforms and reduce noises from trains and fans [286].…”

Section: Mitigation Measuresmentioning

confidence: 99%

“…Ventilation not only significantly affects the thermal and humid environment in a subway station but also plays a vital role in air pollutant transmission and air pollutant-related infection. On the one hand, integrated and intelligent ventilation systems can improve IAQ and conserve energy in subway stations [80,233,[241][242][243][244]. In a subway station, piston winds, hot pressures, the stack effect, and the subway climate can all increase the ambient airflow, regardless of whether the mechanical ventilation system is in operation.…”

Section: Ventilation Mitigation To Improve Environmental Healthmentioning

confidence: 99%

See 2 more Smart Citations

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

Wen

Leng

Shen

et al. 2020

IJERPH

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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.

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Section: Wind Environmentmentioning

confidence: 99%

Section: Mitigation Measuresmentioning

confidence: 99%

Section: Ventilation Mitigation To Improve Environmental Healthmentioning

confidence: 99%

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

Wen

Leng

Shen

et al. 2020

IJERPH

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“…In this instance, β = 0.43. During the testing period of without airshaft, every airshaft was closed [36–37]. The train-tunnel model is shown in Fig 3.…”

Section: Methodsmentioning

confidence: 99%

Moving model analysis on the transient pressure and slipstream caused by a metro train passing through a tunnel

2019

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In this study, the spatial distribution of the transient pressure and the slipstream caused by a 1/10 scaled metro train passing through a tunnel was studied with moving model test. We hereby investigate the mechanism underlying the mitigation of the transient pressure on both the train surface and tunnel wall, as well as that of the slipstream in the tunnel. Experimental results showed that the airshaft at different locations in a tunnel had different pressure relief effects. The most significant pressure amplitude decreased by 36.0% with the airshaft locating in the middle of the tunnel. Meanwhile, the slipstream speed was also relieved from 0.45 to 0.36 after an airshaft. We also assessed and analyzed the impact of train speed on the transient pressures and slipstream. It was found that the increase of the train speed would increase the transient pressure and slipstream speed, but it did not effect their spatial distribution.

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“…Currently, research on thermal hazards control in tunnels has mainly focused on the extraction and utilization of tunnel heat, optimization of ventilation networks, and upgrading of environmental control systems, etc., but the function of tunnel surrounds in regulating the thermal environment of tunnels has rarely been addressed (Insana and Barla 2020;Li et al 2015;Ogunleye et al 2020;Tong et al 2020;Zhang et al 2017). In fact, the surrounding rock of the tunnel can absorb or release a considerable heat to adjust the temperature of airflow in tunnels (Revesz et al 2016;Wang et al 2017;Zhang et al 2017). There have been a number of investigations about the heat transfer of surrounding rocks carried out in the fields of mine thermal disaster, tunnel freezing damage in cold area, underground storage freezer and ground source heat pump (Qin et al 2015b;Revesz et al 2016;Unver and Agan 2003;Yu et al 2018), but rarely involves the subway tunnel.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Thermal Hazards in Surrounding Rock of Subway Tunnel Under Dual Periodic Temperature Boundaries: A Case Study

Liu¹,

Huang²,

Shi³

et al. 2020

Preprint

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Thermal hazards of the surrounding rock of subway tunnels are becoming apparent, in which the heat transfer in the surrounding rock plays a crucial role. Due to the shallow buried depth, the subway tunnel encounters a more complicated heat exchange under the duplicate effects of periodic temperature fluctuation of ground atmosphere and periodic temperature variation of tunnel wind, but this issue has not been fully addressed. In this work, a transient heat transfer model of tunnel surrounding rock based on dual periodic temperature boundaries was established. A solver was developed to estimate the temperature rise and heat transfer of surrounding rock. The correctness of this model was then verified by comparing with previous empirical values and semi-empirical equations. The results show that the temperatures of the surrounding rock at different depths still fluctuate following the simple harmonic waves, and there are some regions that are heavily affected by the duplicate effects, such as the overlying strata of the tunnel. The surrounding rock generally exhibits heat storage in annual cycle, but the total heat storage decreases year by year until it tends to stabilize. Furthermore, the shallower the tunnel is buried, the greater the influence of ground temperature and the higher the temperature rise in the tunnel surrounding rock. This research provides an alternative approach to determine the heat storage of tunnel surrounding rock and evaluates the process of thermal disaster manifestation of subway.

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Energy performance investigation of an innovative environmental control system in subway station

Cited by 57 publications

References 22 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

Moving model analysis on the transient pressure and slipstream caused by a metro train passing through a tunnel

Estimation of Thermal Hazards in Surrounding Rock of Subway Tunnel Under Dual Periodic Temperature Boundaries: A Case Study

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