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冷干风对广漆施工的影响及对策
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作者 周光龙 《中国生漆》 1991年第3期41-43,共3页
本文作者在《中国生漆》(第10卷第1期)上刊出靠怎样制作广漆”一文后,四川省德阳市中区杨加塑料厂油漆工高天伙同志来信,希望以后多写经验技术文章,介绍一些实用技术,互相交流,互相学习,以促进生漆工艺的发展。又来信询问在生漆髹涂施... 本文作者在《中国生漆》(第10卷第1期)上刊出靠怎样制作广漆”一文后,四川省德阳市中区杨加塑料厂油漆工高天伙同志来信,希望以后多写经验技术文章,介绍一些实用技术,互相交流,互相学习,以促进生漆工艺的发展。又来信询问在生漆髹涂施工中如何防治冷干风的影响,并说没见到有人能解决这个技术问题。本文主要就这个问题谈一点个人浅见,求教于同行。一。 展开更多
关键词 冷干风 广漆 施工
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试谈排除不良气候对广漆施工的影响
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作者 杨文光 《中国生漆》 2000年第1期34-37,共4页
关键词 涂装 广漆 施工干燥 冷干风 防止措施
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Wind?Induced Interference Effect Between Newly?Built Cooling Tower and Existing Cooling Tower
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作者 DU Lin KE Shitang +2 位作者 YANG Jie ZHU Rongkuan GE Yaojun 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第1期88-98,共11页
Disturbance effect is one of the important factors for wind damage to large cooling towers.Existing studies on the wind-induced interference of cooling tower groups are aimed at the same size and the lack of wind-indu... Disturbance effect is one of the important factors for wind damage to large cooling towers.Existing studies on the wind-induced interference of cooling tower groups are aimed at the same size and the lack of wind-induced interference effects between cooling towers of different sizes.With the background of the additional cooling tower project at Shandong Luxi Power Plant in China,the rigid body pressure wind tunnel test is carried out to obtain 194 conditions for the three combinations of the existing four-tower combination(small size),the new two-tower combination(large size)and the six-tower combination surface wind pressure distribution.Numerical simulation of the surrounding flow field of the cooling tower group with the most unfavorable interference condition of the six-tower combination is conducted using the computational fluid dynamics(CFD)method.Based on this,the characteristics of the average and pulsating wind pressure distribution of the cooling tower surface under the six-tower combination are mainly studied,and the load interference coefficients of the large-sized cooling tower and the small-sized cooling tower under the three tower group combinations are compared.The velocity flow field and vorticity changes around the cooling tower group at unfavorable wind angles are analyzed,and the wind-induced interference mechanism between cooling tower groups of different sizes is mainly refined.Research shows that the interference effect between such cooling tower groups of different sizes is much larger than that of cooling tower groups of the same size,which is specifically manifested as the enhancement effect of small-sized cooling towers and the shielding effect of large-sized cooling towers.The interference coefficient of large-sized cooling tower groups increases by 28%,and the interference coefficient of small-sized cooling tower groups decreases by 6.4%.The airflow acceleration caused by the pinch effect between small-sized cooling tower groups has an adverse effect on large-sized cooling towers and can significantly increase the magnitude of local wind load.The shielding effect of large-sized cooling towers can reduce the overall wind load of small-sized cooling towers.The research conclusions can provide the basis of wind load value design for wind resistance design of such large cooling tower addition projects. 展开更多
关键词 cooling tower wind tunnel test wind-induced interference effect mechanism of action numerical simulation
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Energy Performance and Condensation Risk of DCDV System in Subtropical Hong Kong
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作者 贾捷 李慧玲 《Transactions of Tianjin University》 EI CAS 2014年第1期42-47,共6页
The combined use of dry cooling(DC) system and dedicated ventilation(DV) system to decouple cooling and dehumidification process for energy efficiency was proposed for subtropical climates like Hong Kong. In this stud... The combined use of dry cooling(DC) system and dedicated ventilation(DV) system to decouple cooling and dehumidification process for energy efficiency was proposed for subtropical climates like Hong Kong. In this study, the energy performance and condensation risk of the use of DCDV system were examined by analyzing its application in a typical office building in Hong Kong. Through hour-by-hour simulation using actual equipment performance data and realistic building and system characteristics, it was found that with the use of DCDV system, the annual energy consumption could be reduced by 54% in comparison with the conventional system(constant air volume with reheat system). In respect of condensation risk, it was found that the annual frequency of occurrence of condensation on DC coil was 35 h. Additional simulations were conducted to examine the influence of different parameters on the condensation risk of DCDV system. Measures to ensure condensate-free on DC coil were also discussed. 展开更多
关键词 dry cooling dedicated ventilation building energy simulation energy performance condensation risk
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