改善水电站主变室热压自然通风的若干问题分析

发布时间：2018-05-09 11:05

本文选题：水电站 + 热压通风　；参考：《西安建筑科技大学》2014年硕士论文

【摘要】：自然通风是一项具有节约资源、减少环境污染、实现可持续发展的室内空气通风降温技术。自然通风的驱动力来自热压和风压，由于风压具有变化幅度大、不稳定的特点，自然通风的设计仅考虑热压的作用[1]。尽管利用自然通风改善建筑热湿环境多年来得到了广泛应用，但是如何结合当地气候条件，通过合理设计进出风口的位置、面积来改善高大厂房热湿环境等方面仍存在许多问题有待于进一步研究。水电站主变室位于主变洞中，主变搬运廊道一侧，结构属于高大空间，其内部变压器热源散热量较大，进风口一般设置变压器前方的墙体上，通风方式大多采用自然通风。在热压自然通风中，有效热量系数m是标志房间温度分布的特征性参数，mQ（Q为车间内工艺设备的总散热量）为直接进入工作区的那部分热量。中和面对主变室通风气流分布有重要的影响，降低中和面的高度可以改善主变室热环境。本文以广东惠州抽水蓄能电站厂房中主变室自然通风降温的提升技术为研究对象，建立物理模型和数学模型，模拟了主变室在不同工况下的室内流场分布情况、有效热量系数m和中和面高度，提出了合理的自然通风优化方案；对全年动态气候参数下主变室的气流组织进行了数值模拟与分析计算。并将广东惠州抽水蓄能电站现场实测值和模拟值进行了对比分析，，该研究结论为水电站主变室以及类似高大厂房的热压自然通风设计提供了参考。
[Abstract]:Natural ventilation is a cooling technology of indoor air which can save resources, reduce environmental pollution and realize sustainable development. The driving force of natural ventilation comes from hot pressure and wind pressure. Because the wind pressure has the characteristics of large range of variation and instability, the design of natural ventilation only considers the effect of hot pressure [1]. Although the use of natural ventilation to improve the thermal and wet environment of buildings has been widely used for many years, how to properly design the location of the air inlet and outlet in combination with local climatic conditions, There are still many problems in the area to improve the thermal and wet environment of the large powerhouse. The main transformer chamber of the hydropower station is located in the main transformer tunnel, the main transformer conveys the corridor side, the structure belongs to the large space, its internal transformer heat source is large, the air inlet is generally set on the wall in front of the transformer, the ventilation mode is mostly natural ventilation. In natural hot press ventilation, the effective heat coefficient m is the characteristic parameter indicating the temperature distribution of the room. The air flow distribution in the main transformer chamber is greatly affected by neutralization, and the thermal environment of the main transformer chamber can be improved by lowering the height of the neutralization plane. In this paper, the lifting technology of natural ventilation and cooling in main transformer chamber of Huizhou pumped Storage Power Station in Guangdong Province is taken as the research object, and the physical and mathematical models are established to simulate the distribution of flow field in the main transformer chamber under different working conditions. Based on the effective heat coefficient m and the height of the neutral plane, a reasonable scheme of natural ventilation optimization is proposed, and the airflow distribution of the main transformer chamber under the annual dynamic climatic parameters is numerically simulated and analyzed. The field measured and simulated values of Huizhou pumped-storage power station in Guangdong Province are compared and analyzed. The results provide a reference for the design of natural hot pressure ventilation in the main transformer chamber of hydropower station and the similar large workshop.
【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】：TV735

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