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冷再热蒸汽管道水击事故探讨 被引量:1
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作者 肖慧杰 张雪松 《电力勘测设计》 2018年第11期27-31,45,共6页
火力发电厂调试阶段有四大管道震动事故,以冷再热蒸汽管道震动最为频发。主因是冷再热蒸汽管道介质参数低、流量大、流速高,设计或调试不当易出现管内汽携水流动引发水击事故。本文以京能盛乐工程2号机组首次空负荷整套启动中冷再热蒸... 火力发电厂调试阶段有四大管道震动事故,以冷再热蒸汽管道震动最为频发。主因是冷再热蒸汽管道介质参数低、流量大、流速高,设计或调试不当易出现管内汽携水流动引发水击事故。本文以京能盛乐工程2号机组首次空负荷整套启动中冷再热蒸汽管道震动为例,根据事故现场管道震动表象、损伤实况,宏观分析了密闭管道内水击形成过程及相应介质状态、影响水击破坏力强弱因素,使工程技术人员对水击事故成因、严重后果清晰认知,然后结合设计、调试两方面对水击原因进行剖析,提出建议,以减少同类事故的发生。 展开更多
关键词 冷再热蒸管道 汽携水 震动
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Design of Portable Shell and Tube Heat Exchanger for a Solar Powered Water Distiller
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作者 A. Khiabani N.M. Adam +1 位作者 T.S. Hong M. Ali 《Journal of Energy and Power Engineering》 2011年第7期612-619,共8页
This study presents theoretical considerations and results of a portable shell and tube heat exchanger in a solar water distiller system. The device is composed of a glass heat exchanger, which served as a condenser f... This study presents theoretical considerations and results of a portable shell and tube heat exchanger in a solar water distiller system. The device is composed of a glass heat exchanger, which served as a condenser for vapor condensing which were produced in black paint solar absorber. It was also composed of a tank for water source and a tank for produced distilled water. Shell and tube was designed and simulated using an implicit numerical scheme. Simulation results showed that accumulated mass water greatly depended on the inlet vapor temperature and volume, heat exchanger material, coolant water temperature and volume. Thus, changing the material from stainless steel to glass in the same condition (vapor temperature, vapor volume, coolant temperature and coolant volume). These inexpensive shell and tube heat exchangers permitted to produce 40 litre/day, distilled water from vapor with 378 K inlet temperature in atmosphere pressure. If inlet pressure increases, vapor temperature will decline and thereupon, heat exchanger's efficiency tangibility will increase. 展开更多
关键词 Portable solar powered distiller heat exchanger shell and tube.
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