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Three-Dimensional Numerical Analysis for Temperature Characteristic of Ventilated Embankment with Insulated Door
A reformative ventilated embankment installed insulated doors at the ends of ventilated ducts, which can open and close automatically according to air temperature lower or higher a threshold (such as 0°C), respectively, is proposed and used in some high-temperature frozen soil regions in Qinghai-Tibetan railway project. The main aim is to prevent heat transfer into embankment on hot season through ventilated ducts and to enhance the cooling effects of ventilated ducts effectively. Using the finite element method, the three dimension temperature fields for ventilated embankment with or without insulated door are calculated respectively on condition that the annual mean air temperature in Qinghai-Tibetan Plateau will be warmed up by 2.6°C in the future 50 years and the mean annual temperature at the natural surface is about –1°C. The results indicate that the ventilated embankment with insulated doors can decrease efficiently heat absorbed by embankment, and lowest temperatures in embankment are lower about 1°C than those without insulated doors. Thus the thermal stability of embankment is ensured even more, at the same time it also provides guarantee for the safe running of Tibetan railway. In same time, author provided advice for design department basis on analysis results.
Three-Dimensional Numerical Analysis for Temperature Characteristic of Ventilated Embankment with Insulated Door
A reformative ventilated embankment installed insulated doors at the ends of ventilated ducts, which can open and close automatically according to air temperature lower or higher a threshold (such as 0°C), respectively, is proposed and used in some high-temperature frozen soil regions in Qinghai-Tibetan railway project. The main aim is to prevent heat transfer into embankment on hot season through ventilated ducts and to enhance the cooling effects of ventilated ducts effectively. Using the finite element method, the three dimension temperature fields for ventilated embankment with or without insulated door are calculated respectively on condition that the annual mean air temperature in Qinghai-Tibetan Plateau will be warmed up by 2.6°C in the future 50 years and the mean annual temperature at the natural surface is about –1°C. The results indicate that the ventilated embankment with insulated doors can decrease efficiently heat absorbed by embankment, and lowest temperatures in embankment are lower about 1°C than those without insulated doors. Thus the thermal stability of embankment is ensured even more, at the same time it also provides guarantee for the safe running of Tibetan railway. In same time, author provided advice for design department basis on analysis results.
Three-Dimensional Numerical Analysis for Temperature Characteristic of Ventilated Embankment with Insulated Door
Liu, ZhiQiang (author) / Lai, Yuanming (author) / Yu, Wenbing (author)
13th International Conference on Cold Regions Engineering ; 2006 ; Orono, Maine, United States
2006-07-14
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2006
| British Library Conference Proceedings | 2006
Analysis of temperature controlled ventilated embankment
| Online Contents | 2005