全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

侧风下逆流湿式冷却塔优化进风的实验研究

, PP. 48-54

Keywords: 冷却塔,侧风,优化,导风板,进风均匀系数,热态实验

Full-Text   Cite this paper   Add to My Lib

Abstract:

为降低侧风对自然通风逆流湿式冷却塔进风的不利影响,引入一种优化进风的新方法??在进风口周向上安装导风板,同时,为定量分析冷却塔周向进风均匀性,定义进风均匀系数。基于热态模型实验,研究侧风工况下安装导风板对湿式冷却塔进风及热力性能的影响。通过对进风性能及冷却效率的对比分析,揭示了侧风影响冷却性能的2个根本原因:侧风不仅降低了通风量,还破坏了冷却塔周向进风的均匀性,冷却效率的降低是二者共同作用的结果。安装导风板对周向进风进行优化之后,通风量增大,进风均匀系数也有较大提高,塔内传热传质均匀性增强,冷却效率有较大提升。刘易斯因子分析表明,优化进风对传热的强化作用更大,但同时增加了绝对蒸发水损失。

References

[1]  李秀云,严俊杰,林万超. 火电厂冷端系统评价指标及诊断方法的研究[J]. 中国电机工程学报, 2001,21(9):94-99. Li Xiuyun,Yan Junjie,Lin Wanchao.Study on thermo-economics diagnosis method and index evaluation system for the cold-end system in steam power unit[J].Proceedings of the CSEE,2001,21(9)
[2]  Kloppers J C,Kr?ger D G. A critical investigation into the heat and mass transfer analysis of counterflow wet-cooling towers[J]. International Journal of Heat and Mass Transfer, 2005,48(3-4):765-777.
[3]  Fisenko S P,Petruchik A I,Solodukhin A D. Evaporative cooling of water in a natural draft cooling tower[J]. International Journal of Heat and Mass Transfer, 2002,45(23):4683-4694.
[4]  Hawlader M N A,Liu B M. Numerical study of the thermalhydraulic performance of evaporative natural draft cooling towers[J]. Applied Thermal Engineering, 2002,22(1):41-59.
[5]  Williamson N,Armfield S,Behnia M. Numerical simulation of flow in a natural draft wet cooling tower-the effect of radial thermofluid fields[J]. Applied Thermal Engineering, 2008,28(2-3):178-189.
[6]  Smrekar J,Oman J,Sirok B. Improving the efficiency of natural draft cooling towers[J]. Energy Conversion and Management, 2006,47(9-10):1086-1100.
[7]  Muangnoi T,Asvapoositkul W,Wongwises S. An exergy analysis on the performance of a counterflow wet cooling tower[J]. Applied Thermal Engineering, 2007,27(5-6):910-917.
[8]  Gao M,Sun F Z,Wang K,et al. Experimental research of heat transfer performance on natural draft counter flow wet cooling tower under cross-wind conditions[J]. International Journal of Thermal Sciences, 2008,47(7):935-941.
[9]  赵元宾,孙奉仲,王凯,等. 侧风对湿式冷却塔空气动力场影响的数值分析[J]. 核动力工程, 2008,29(6):35-40. Zhao Yuanbin,Sun Fengzhong,Wang Kai,et al.Numerical analysis of crosswind effect on wet cooling tower aerodynamic field[J].Nuclear Power Engineering,2008,29(6)
[10]  赵元宾,孙奉仲,王凯,等. 十字隔墙湿式冷却塔冷却特性的数值研究[J]. 中国电机工程学报, 2009,29(8):6-13. Zhao Yuanbin,Sun Fengzhong,Wang Kai,et al.Numerical analysis of the cooling performance of wet cooling tower with cross wall[J].Proceedings of the CSEE,2009,29(8)
[11]  周兰欣,蒋波,陈素敏. 自然通风湿式冷却塔热力特性数值模拟[J]. 水利学报, 2009,40(2):208-213. Zhou Lanxin,Jiang Bo,Chen Sumin.Numerical simulation for thermal performance of natural draft wet cooling tower[J].Journal of Hydraulic Engineering,2009,40(2)
[12]  蒋波,周兰欣. 自然通风冷却塔加装十字挡风墙数值研究[J]. 汽轮机技术, 2010,52(3):165-168,172. Jiang Bo,Zhou Lanxin.Numerical study of installing cross-windbreak on natural draft cooling tower[J].Turbine Technology,2010,52(3)
[13]  陈友良,孙奉仲,高明,等. 十字隔墙对湿式冷却塔性能影响的实验研究[J]. 中国电机工程学报, 2012,32(11):28-34. Chen Youliang,Sun Fengzhong,Gao Ming,et al.Experimental study of cross walls effect on the performance of wet cooling towers[J].Proceedings of the CSEE,2012,32(11)
[14]  史佑吉. 冷却塔运行与试验[M]. 北京:水利电力出版社, 1990:183-188. Shi Youji.Cooling tower operation and test[M].Beijing:China Water-PowerPress,1990
[15]  Kloppers J C,Kroger D G. The Lewis factor and its influence on the performance prediction of wet-cooling towers[J]. International Journal of Thermal Sciences, 2005,44(9):879-884.
[16]  刘志云,王栋,林宗虎. 侧向风对自然通风直接空冷塔性能影响的数值分析[J]. 动力工程, 2008,28(6):915-919. Liu Zhiyun,Wang Dong,Lin Zonghu.Numerical analysis of the influence of side wind on the performance of the direct air cooling tower with natural ventilation[J].Journal of Power Engineering,2008,28(6)
[17]  张晓东,王清照. 侧风对自然通风空冷塔冷却性能的影响[J]. 中国电力, 1999,32(6):34-36,47. Zhang Xiaodong,Wang Qingzhao.Impact of side wind on the cooling performance of natural draft air cooling tower [J].Electric Power,1999,32(6)
[18]  赵振国,石金玲,魏庆鼎,等. 自然风对空冷塔的不利影响及其改善措施[J]. 应用科学学报, 1998,16(1):112-120. Zhao Zhenguo,Shi Jinling,Wei Qingding,et al.The engineering improvement for weakening the bad effect of natural wind on the dry cooling towers[J].Journal of Applied Sciences,1998,16(1)
[19]  Derksen D D,Bender T J,Bergstrom D J,et al. Study on the effects of wind on the air intake flow rate of a cooling tower:Part 1. Wind tunnel study[J].Journal of Wind Engineering and Industrial Aerodynamics, 1996,64(1):47-59.
[20]  Bender T J,Bergstrom D J,Rezkallah K S. Study on the effects of wind on the air intake flow rate of a cooling tower:Part 2. Wind tunnel study[J].Journal of Wind Engineering and Industrial Aerodynamics, 1996,64(1):61-72.
[21]  Bender T J,Bergstrom D J,Rezkallah K S. Study on the effects of wind on the air intake flow rate of a cooling tower:Part 3. Numerical study[J].Journal of Wind Engineering and Industrial Aerodynamics, 1996,64(1):73-88.
[22]  Zhai Z,Fu S. Improving cooling efficiency of dry-cooling towers under cross-wind conditions by using wind-break methods[J]. Applied Thermal Engineering, 2006,26(10):1008-1017.
[23]  Al-Waked R,Behnia M. CFD simulation of wet cooling towers[J]. Applied Thermal Engineering, 2006,26(4):382-395.
[24]  Al-Waked R,Behnia M. Enhancing performance of wet cooling towers[J]. Energy Conversion and Management, 2007,48(10):2638-2648.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133