环境风对新型空冷单元换热特性影响的研究

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英文篇名：Study on Influence of Ambient Air Upon Heat Transfer Characteristics of a New Air Cooling Unit 作者：周玉 ; 施宏波 ; 程友良 ; 骆克 英文作者：ZHOU Yu;SHI Hong-bo;CHENG You-liang;LUO Ke;College of Energy and Power Machinery Engineering,North China University of Electric Power;Guodian Tai'an Thermal Power Company Limited; 关键词：圆台形空冷单元 ; 环境风 ; 换热特性 ; 数值模拟 英文关键词：truncated cone-shaped air-cooled cell;;ambient wind;;heat transfer characteristics;;numerical simulation 中文刊名：QLJV 英文刊名：Turbine Technology 机构：华北电力大学能源与动力机械工程学院;国电泰安热电有限公司; 出版日期：2019-04-25 出版单位：汽轮机技术 年：2019 期：v.61;No.239 基金：中央高校基本科研业务费专项基金(2016MS154) 语种：中文; 页：QLJV201902011 页数：4 CN：02 ISSN：23-1251/TH 分类号：46-49

摘要

针对由环境风所造成的直接空冷单元热风回流、传热恶化等问题,以某600MW直接空冷机组为例,采用Fluent软件分别建立传统A字形与新型圆台形空冷单元计算模型。在添加常见挡风墙的前提下,对两种空冷单元的换热特性进行对比研究。着重分析了不同环境风速下,两种空冷单元的温度分布,最高温度、平均温度及高温区域的变化趋势。并从风机风量与换热量两个角度,对其进行对比。结果表明:在不同环境风速下新型圆台形空冷单元换热表现更稳定、抗环境风干扰性更强。无论是经济性还是安全性较传统A字形空冷单元都具明显优势。
        Aiming at solving the problem of hot air recirculation and heat transfer deterioration in direct air-cooling cell, taking a 600 MW direct air-cooling unit as an example, the A-shaped and the new truncated cone-shaped air-cooled condenser are set up using the Fluent software. Under the premise of adding common wind-break wall, the heat transfer characteristics of two types of air cooling units are compared. The changing trend of temperature distribution, maximum temperature, average temperature and the high temperature regions of air cooling units under different ambient wind speeds are emphatically analyzed. A comparative analysis is made according the fan air volume and the heat transfer. The results show that the new truncated cone-shaped air-cooled cell is more stable heat transfer performance and stronger resistance to ambient wind in different wind speeds. Both the economy and the safety are obviously superior to the traditional A-shaped air cooling unit.

引文

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