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仙游抽水蓄能电站地下厂房空调通风模型试验

发布时间:2019-01-10 21:14  文章来源:笔耕文化传播
【摘要】:当今世界资源形势日益紧张,水力发电空前发展,国内外修建了大量的抽水蓄能电站。但是此类电站地下厂房的设备层及母线洞机电设备布置复杂、散热不均,国内外相关的气流组织研究较少。在水电站地下厂房空调通风设计中,这些设备层之间的通风往往采用夹墙机械通风的方式,母线洞洞尾排风。本文以相似理论为依据,以阿基米德数Ar为相似准则数,参照国内外地下电站的通风模型试验及李安桂教授课题组历年来利用激光测速2DPIV技术对水电站通风气流组织缩尺模型的研究经验,建立比例为1∶50的几何模型,,并对厂房的通风气流组织进行了2DPIV试验研究和分析。 试验过程中分别采用了三种不同的送风速度:V/V0=0.75、 V/V0=1和V/V0=1.25(其中V0是模型设计送风速度)和三种不同的热源强度:Q/Q0=0.75、Q/Q0=1和Q/Q0=1.25(其中Q0是模型设计发热量)试验首先对主厂房内中间层、水轮机层、蜗壳层等设备层及母线洞工作区温度场进行了测定,研究了在不同送风速度、不同热源强度下夹墙机械通风对各层及机械排风对母线洞工作区温度场的影响;采用2DPIV对母线洞的速度场进行了研究,探究不同送风速度、不同热源强度下机械排风对母线洞速度场的影响。本研究对水电站地下主厂房空调通风设计提供了参考依据。
[Abstract]:Nowadays, with the increasing shortage of resources and the unprecedented development of hydropower generation, a large number of pumped storage power stations have been built at home and abroad. However, the equipment layer and bus tunnel of this kind of underground powerhouse have complicated arrangement and uneven heat dissipation, and there are few researches on the airflow organization at home and abroad. In the air conditioning and ventilation design of underground powerhouse of hydropower station, the ventilation between these equipment floors is usually carried out by mechanical ventilation with wall, and the exhaust air at the end of the bus tunnel is used. Based on the similarity theory, this paper takes the Archimedes number Ar as the similarity criterion number. Referring to the ventilation model tests of underground power stations at home and abroad and the research experience of Professor Li Angui's research group on the scaling model of ventilation airflow organization of hydropower stations by using laser velocimetry 2DPIV technology over the years, a geometric model with a scale of 1:50 is established. The ventilation airflow distribution of the workshop was studied and analyzed by 2DPIV test. During the experiment, three different air supply speeds were used: v / V _ 0 0.75, V/V0=1 and V/V0=1.25 (where V _ 0 is the model designed air supply velocity) and three different heat source intensities: Q / Q _ 0 0.75, Q/Q0=1 and Q/Q0=1.25 (where Q0 is the calorific value of model design) the temperature field of the equipment layer in the main building, the turbine layer, the volute layer, and the working area of the busbar tunnel are measured at first, and the velocity of air supply is studied. The influence of mechanical ventilation on the temperature field of the busbar tunnel working area under different heat source intensity; The velocity field of busbar tunnel is studied by 2DPIV, and the influence of mechanical exhaust air on the velocity field of busbar tunnel under different air velocity and heat source intensity is explored. This study provides a reference for the air-conditioning ventilation design of underground main powerhouse of hydropower station.
【学位授予单位】:西安建筑科技大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:TV731.6;TV735

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