Open AccessStudy on the influence of temperature differences in the tunnel on ventilation system energy consumption
Author(s) -
Yusheng Zhu,
Guoping Zheng
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/601/1/012015
Subject(s) - ventilation (architecture) , natural ventilation , wind tunnel , airflow , atmospheric pressure , energy consumption , environmental science , wind speed , supersonic wind tunnel , hypersonic wind tunnel , mechanics , meteorology , engineering , mechanical engineering , physics , electrical engineering
The formula of the atmospheric pressure difference caused by the temperature difference in the tunnel and the environment outside the tunnel was established in this paper based on the Clapeyron equation to study the influence of the temperature difference between inside and outside the tunnel on the energy consumption of the ventilation system. Then, a scaled-down model tunnel is established. The air inside the model is heated by electric heating, the temperature and velocity of airflow along the center of the tunnel model are measured in detail, and the atmospheric pressure difference and wind speed in the model tunnel with different slopes are discussed. The results indicate that the tunnel has an obvious natural ventilation effect under specific temperature difference between inside and outside, and it becomes better as the slope increases. The shaft-type natural ventilation can promote the overall tunnel ventilation, and making full use of natural wind can save 15% of the energy consumption of mechanical ventilation.