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螺旋槽铜管在辽电12号机凝汽器中的应用 被引量:1
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作者 聂熙庆 《东北电力技术》 1997年第6期18-22,共5页
辽宁发电厂12号机更新凝汽器铜管时,试装半侧为光滑铜管另半侧为自制螺旋槽铜管,经做冬、夏季试验,凝汽器采用螺旋槽铜管侧比光滑铜管侧提高总体传热系数30%以上,每年可节约标准煤2043t。
关键词 发电厂 蒸汽透平 螺旋槽铜管 蒸汽冷凝器
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汽轮发电机组复水器试装螺旋槽铜管强化传热的研究
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作者 王宗训 张慧钟 《辽宁电机工程学报》 1995年第3期18-23,共6页
火力发电厂汽轮发电机组复水器是损失低品位能源较大的设备。本文介绍了复水器光滑铜管改成螺旋槽铜管强化传热机理,螺旋槽铜管制造工艺过程,并以冬季和夏季试验对比,证实螺旋槽铜管传热明显优于光滑铜管,复水器端差下降,机组真空... 火力发电厂汽轮发电机组复水器是损失低品位能源较大的设备。本文介绍了复水器光滑铜管改成螺旋槽铜管强化传热机理,螺旋槽铜管制造工艺过程,并以冬季和夏季试验对比,证实螺旋槽铜管传热明显优于光滑铜管,复水器端差下降,机组真空提高,降低了热耗,增加了总体传热系数,达到明显节能降耗,有推广实用价值。 展开更多
关键词 复水器 螺旋槽铜管 强化传热 汽轮发电机
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Ammonia corrosion analysis of copper tubes and experimental research on non-copper improvement for heat exchanger in power plant
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作者 ZENG Zhou-hua LONG Xin-feng LIANG Ping 《Journal of Chemistry and Chemical Engineering》 2009年第12期30-36,共7页
Ammonia corrosion in copper tube will affect the safety of boiler running in power plant. Therefore, no copper in heating system has become a technical orientation in heat exchanger reconstruction, This paper analy... Ammonia corrosion in copper tube will affect the safety of boiler running in power plant. Therefore, no copper in heating system has become a technical orientation in heat exchanger reconstruction, This paper analyzes the condition and mechanism of ammonia corrosion occurring in copper tube used in coal-fired power plants. Using a general steam condensation testing equipment only for horizontal single tube, with water vapor and water as working fluid, on two types of steel tube with 2-side enhancement heat transfer, namely, a spirally fluted tube and a ratchet tube with internal spiral groove (RISG tube) which was developed recently, a set of experimental tests are conducted to investigate the characteristics of heat transfer and hydromeehanics. In order to compare easily, both one copper smooth tube and one steel smooth tube are also used in the experiment. The experimental results, which get from single horizontal tube, show that the overall heat transfer coefficient of steel spirally fluted tube are improved by 10%o to 17%, and that of the steel RISG tube(22%-28%) is better than steel spirally fluted tube, its flow resistance coefficient is only increased by 22% to 66% when compared with smooth tube. Based on a lot of experimental data, the steel spirally fluted tube and the steel RISG tube were applied in a low pressure preheater and an oil-cooler of some or other power plant respectively. The field testing results showed that their heat transfer coefficient with each types of enhancement heat transfer tubes were improved by 2.5% and 21%-45% comparing with copper smooth tube heat exchangers. Both basic and field experiment indicates that the steel tube with 2-side enhancement heat transfer is an ideal choice for heat exchanger reconstruction in no copper issue in power plants. 展开更多
关键词 spirally fluted tube ratchet tube with internal spiralgroove heat transfer enhancement copper corrosion low-pressure preheater oil cooler no copper in heating system
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