摘要
直接空冷由于其巨大的节水优势、是我国西北等缺水地区新建采用的最主要电厂冷却系统形式。但直接空冷系统很容易受到周围环境影响,需要对厂区设计等进行详细评估。利用计算流体力学方法,对一个8×600MW多平台联建的电厂实例进行了计算。通过对平台速度场、风机入口速度和温度等流场细节的分析,从经济型和安全性两个方面对比了不同布置方式的优劣。结果表明,对于这种大规模空冷系统,两台联建方式在散热方面拥有一定优势,适合实际工程中予以采用以弱化环境风对电厂经济性和安全性的不利影响。
Because of the huge advantage of water conservation,direct air-cooling became the most common form of power plants＇ cooling systems.However,due to the sensibility of environment,it is necessary to make detailed estimate of plant area designs.Based on CFD method,heat dissipation of a practical power plant with 8×600 MW unit is calculated.By analyzing the detailed flow field such as velocity around platforms,temperature and velocity of fans＇ inlets,different construction designs are compared in the aspects of economy and safety.The result indicates that for large scale power plants,the design of two units constructed together has a clear advantage in heat dissipation,which should be proposed to reduce the negative influence of environmental winds.
出处
《科学技术与工程》
2010年第29期7111-7117,共7页
Science Technology and Engineering
关键词
直接空冷系统
数值模拟
散热分析
建设方式优化
direct air-cooling systems numerical simulation analysis of heat dissipation design optimization
