Page 74 - 2021年第52卷第7期
P. 74
Study on prototype intelligent control test of cooling pipeline for a super-high arch dam
1 1 1 2 2 2
LIN Peng , NING Zeyu ,LI Ming ,FAN Qixiang ,WANG Zhilin ,CHEN Wenfu
(1. Department of Hydraulic Engineering,Tsinghua University,Beijing 100084,China;
2. China Three Gorges Projects Development Co.,Ltd.,Chengdu 610041,China)
Abstract:Carrying out a prototype intelligent control test of the cooling pipeline of a super-high arch dam
is of great significance to ensure accurate, efficient cracking control. Based on the intelligent cooling prac⁃
tice of the Baihetan super-high arch dam, this study systematically analyses the adaptable conditions for
heat exchange and cracking prevention of super-high arch dams,including the temperature,flow rate,and
direction. The demand determination method of the cooling water is proposed,and a quantitative evaluation
index of the water supply guarantee rate is defined firstly. An intelligent control method and system of the
cooling pipeline is developed based on conducting prototype tests at Baihetan dam site. The system over⁃
comes the uncertainty of manual control, realizes real-time online cooling monitoring of the temperature,
pressure,flow rate,and flow direction. The heat exchange effect is better. The spatial-temporal distribution
of the cooling water inside the pipeline is revealed. The test results show that the temperature change of
the supply cooling water along the way is mainly affected by the outside air temperature and pipeline insula⁃
tion. Under the condition that the cooling capacity meets the demand, the cooling water is mainly affected
by supply pressure. The study results promote the full application of intelligent cooling pipeline control on
a super-high arch dam and may also be applicable to the design and construction of similar projects world⁃
wide.
Keywords:super-high arch dam;baihetan arch dam;cooling pipeline;intelligent synchronous control;in⁃
telligent cooling
(责任编辑:王冰伟)
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