A review of energy consumption and saving in extra-long tunnel operation ventilation in China

Guo, Chun; Wang, Mingnian; Yang, Lu; Sun, Zhitao; Zhang, Yunlong; Xu, Jianfeng

doi:10.1016/j.rser.2015.09.094

Cited by 65 publications

(20 citation statements)

References 21 publications

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“…Based on Equations (1) and (2), Guo et al proposed a new calculation method for the natural wind velocity inside the tunnel, which is briefly introduced below [30].…”

Section: Calculation Methods Of the Natural Wind Velocity In The Tunnementioning

confidence: 99%

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Energy-Saving Network Ventilation Technology of Extra-Long Tunnel in Climate Separation Zone

Guo

Yang

et al. 2017

Applied Sciences

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Saving energy is a major challenge for the development and safety of the world. Researchers at home and abroad have been continuously working on energy saving technology in the tunnel ventilation for decades. Based on segmented longitudinal ventilation for extra-long road tunnels, the main ventilation mode and utilization method of natural wind energy in extra-long road tunnel were analyzed in this paper. In addition, the possible velocity distribution of natural wind in each section under wind pressure was investigated. Principles of natural wind in each tunnel section were studied based on long-term monitored meteorological factors. Accordingly, a fan equipment configuration method with high guaranteed rate during tunnel operation was proposed. A calculation method for energy-saving network ventilation in the tunnels was established. A feasible and efficient optimized energy-saving ventilation strategy was proposed, which utilizes natural wind and reduces the operation energy consumption. Thus, the annual energy saving in ventilation can reach up to 43.2% compared to previous energy costs when the intelligent ventilation system works. The research results can properly combine natural wind energy with mechanical ventilation to realize the smart self-energy saving in extra-long tunnels.

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“…Based on Equations (1) and (2), Guo et al proposed a new calculation method for the natural wind velocity inside the tunnel, which is briefly introduced below [30].…”

Section: Calculation Methods Of the Natural Wind Velocity In The Tunnementioning

confidence: 99%

“…After blowing to the tunnel entrance, the natural wind outside the tunnel is decelerated by mountains and then part of the dynamic pressure is converted into static pressure, which is called "ventilation-wall pressure difference". It is calculated as follows [30]:…”

Section: Calculation Methods Of the Natural Wind Velocity In The Tunnementioning

confidence: 99%

Energy-Saving Network Ventilation Technology of Extra-Long Tunnel in Climate Separation Zone

Guo

Yang

et al. 2017

Applied Sciences

Self Cite

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“…However, in reality, the most unfavourable conditions rarely occur in both the double-line tunnels at the same time. Thus, operation according to the most unfavourable conditions will inevitably result in wasted air volume and energy [34,35]. proposed the use of full jet longitudinal ventilation with a single U-type ventilation mode and a double U-type ventilation mode, according the real conditions of the Dabieshan Tunnel.…”

Section: Ventilation Mode Analysismentioning

confidence: 99%

Complementary Ventilation Design Method for a Highway Twin-Tunnel Based on the Compensation Concept

Chai

Wang

Han

et al. 2018

Mathematical Problems in Engineering

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Based on the compensation concept, an improved method for twin-tunnel complementary ventilation design considering differences in key pollutants in the uphill and downhill tunnels was proposed. The results demonstrate that the scheme developed using the improved method is more energy efficient when the energy consumption of the interchange channel is included. Here, a larger design of air volume is allocated to the uphill tunnel, and the admissible pollutant concentration for its exits. The complementary ventilation system of the Qingniling Tunnel, Dabieshan Tunnel, and Lianghekou Tunnel was redesigned for long-term performance using the improved method, and the resulting scheme was compared to that designed using the current method in terms of the total required air volume, interchange air volume, ventilation effects, and energy consumption. The results show that these factors in improved method are significantly smaller than that of the current method with an allowable reduction of ventilation effects. Moreover, the total airflow required in the Qingniling Tunnel was reduced from 889.31 to 796.74 m3/s, with a decrease rate of 10.4%; the interchange air volume was reduced from 203 to 175 m3/s, and the estimated energy consumption was decreased from 2760 to 2065.9 kW. This represents a 26% improvement in energy efficiency. The proposed method can provide a reference for the energy efficient design of ventilation systems in extra-long highway tunnels.

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“…Zhang et al made corresponding contributions to the solution of ventilation resistance from various aspects such as energy exchange, energy loss and different resistance losses [2][3][4][5][6][7]. Guo et al found that there was the influence of local ventilation resistance on the long-distance ventilation of the tunnel construction [8].…”

Section: Introductionmentioning

confidence: 99%

Derivation and Verification Analysis of Local Ventilation Resistance Formula of the Section Gradual Reduction Roadway

Wang¹,

Zhang²,

Yongge³

2019

JESTR

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The gradually reduced section of the roadway is a transitional section connecting two different roadways, which plays an important role in reducing the local ventilation resistance of the mine ventilation system. To reveal the local ventilation resistance characteristics of the roadway, the flow dynamics model of the roadway was bulit, the formula of the local ventilation resistance of the section gradual reduction roadway was deduced, and the formula was verified by the measured data. Results show that the local resistance coefficient, local ventilation resistance, and local air resistance of the gradually reduced section of the roadway are reduced by 5.71, 1.59, and 1.52 times of that of the suddenly reduced section of the roadway, respectively, which indicates that section gradual reduction roadway is in a lower energy consumption state. The conclusions obtained in the study are of great value to direct the design and construction of the similar engineering practice.

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A review of energy consumption and saving in extra-long tunnel operation ventilation in China

Cited by 65 publications

References 21 publications

Energy-Saving Network Ventilation Technology of Extra-Long Tunnel in Climate Separation Zone

Energy-Saving Network Ventilation Technology of Extra-Long Tunnel in Climate Separation Zone

Complementary Ventilation Design Method for a Highway Twin-Tunnel Based on the Compensation Concept

Derivation and Verification Analysis of Local Ventilation Resistance Formula of the Section Gradual Reduction Roadway

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