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Characteristics of Heat and Moisture Transfer of Tailrace Tunnel Ventilation in Hydropower Station

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2009年05期
Page:
600-606
Research Field:
Publishing date:

Info

Title:
Characteristics of Heat and Moisture Transfer of Tailrace Tunnel Ventilation in Hydropower Station
Author(s):
YU Yan-shun1LI Xian-ting2SHI Wen-xing2
1.School of Power Engineering,NUST,Nanjing 210094,China;2.Department of Building Science,Tsinghua University,Beijing 100084,China
Keywords:
heat and moisture transfer quasi-three-dimensional models tailrace tunnels ventilation hydropower stations
PACS:
TV735
DOI:
-
Abstract:
Based on the quasi-three-dimensional mathematical model of the tailrace tunnel ventilation,the annual ventilating characteristics with different ground thermal parameters,wind speed and water temperature are simulated,and the effects of the factors on the heat and moisture transfer characteristics of the tailrace tunnel ventilation are analyzed.The results show that the effect of long-term thermal accumulation of the tunnel on ventilation characteristics can be ignored,the heat and moisture transfer between air and water surface is dominant and the transfer amount reaches 80%~90% of the total.Moreover,the air parameters are gradually close to the saturation condition of the corresponding water temperature with approximate index function along its flowing direction,and the cycle of air parameter change is one year.

References:

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Last Update: 2012-11-19