2013年第11期（总第191期)
doi:10.3969/j. issn.1009 3230.2013.011.010
应用能源技术
37
SCAL型间接空冷塔内外空气流动和传热性能数值研究
忻炜，向同琼，周黎明
（1.中国石油化工股份有限公司天津分公司热电部，天津300270：
2.华北电力大学电站设备状态监测与控制教育部重点实验室，河北保定071003）
摘要：利用计算流体力学软件CFD，对自然通风状态下，某电厂2×300MW机组两机一塔的SCAL型间接空冷散热器空冷塔内外空气的流动和传热性能进行数值模拟、分析和研究。确定考核工况基准下，不同环境风速对空冷塔通风量和间接空冷散热器散热量以及机组背压的影响。模拟结果显示，随着环境风速的增加，空冷塔内外流场发生复杂变化，空冷塔通风量和散热器散热量降低，机组背压升高，将引起很大的经济损失。这为间接空冷系统空冷散热器的优化设计提供了参考。
关键调：间接空冷散热器：空冷塔：CFD：流动传热性能；背压中图分类号：TK264.1
文献标志码：A文章编号：1009-3230(2013)11-0037-05
NumericalResearchonFlowandHeatTransferPerformanceof Air InsideandOutsidetheSCALTypeIndirectAirCooledTower
XIN Wei',XIANG Tongqiong",ZHOU Liming
(1.SINOPEC Tianjin Branch Corporation Department of Thermal,Tianjin 300270,China; 2.MOEs Key Lab of Condition Monitoring and Control of Power Plant Equipment
North China Electric Power University,Baoding 071003,China)
Abstract : By using computational fluid dynamics software, a series of numerical simulation, analysis and research on the flow and heat transfer performance of the air inside and outside the SCAL type indirect air aeoeaaooaoo perfomance assessment condition, the influence of diferent wind speed on the air flow rate of the tower, heat transfer rate of the indirect air cooled radiator and the unit back pressure is determined. The sjimulation results show that as the environment wind speeds grow, the flow field inside and outside the tower changes complexly, and the air flow rate of the tower and the heat flux of the radiator decreases thus the unit back pressure rises, which would cause great economic loss. The present studies are of use in optimal designing for the air cooled heat exchangers of indirect dry cooling system.
Key words: Indirect air cooled radiator; Air cooling tower; CFD; Flow and heat transfer charac-teristics;Back pressure
引言 0
空冷系统节水效果显著，在富煤贫水地区被
收稿日期：2013=0910修订日期：2013-10-27 作者简介：析炜（1968-），男，高级工程师。研究方向：
从事电厂设备检维修、工程质量检验管理等工作。
万方数据
广泛采用。随着近几年机组容量的不断扩大，传统间接空冷系统陆续显现出各自的弊端。哈蒙式间接空冷系统的空冷塔体型庞大、基建投资高昂：海勒式间接空冷系统在大型超临界机组中面临着水质要求高、难于控制等问题。因此SCAL型间