共查询到19条相似文献,搜索用时 140 毫秒
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基于ANSYS的全焊接板式换热器的应力分析 总被引:2,自引:0,他引:2
利用ANSYS 9.0有限元程序对全焊接板式换热器管侧集合箱进行了应力分析,获得了管侧集合箱的各向应力及M ises等效应力和变形结果,为连接板的设计及变形分析提供了理论依据。 相似文献
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固定管板式换热器应力分析和疲劳分析 总被引:1,自引:1,他引:0
介绍了某固定管板式换热器压力温度循环条件,建立热分析和结构分析的有限元模型,计算得出管板的温度场和应力场,进行应力分析和疲劳分析。 相似文献
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为了获得换热器管箱在管程设计压力下的应力分布情况,借助大型有限元软件ANSYS对该设备部件分别进行应力分析,进而依据相关标准对该设备进行了相应的强度评估。结果表明在设计条件下,该换热器管箱评定为合格;应用有限元方法可以从理论上确定化工设备设计方案的安全性和可靠性。 相似文献
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介绍了中国石化洛阳分公司芳烃装置低温热项目应用全焊接板式换热器回收利用塔顶余热,通过对板式换热器特点进行分析,结合首次投用注意事项及日常维护,确保全焊接板式换热器长周期稳定运行。 相似文献
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主要利用ANSYS有限元软件对固定管板式换热器管板与换热管进行应力分析,获得了该结构的应力强度分布图,可知该结构的最大应力强度发生在筒体与管板的连接处,最大应力强度为160.133 MPa。然后在应力分析的基础上,利用ANSYS有限元软件中的蒙特卡罗法对该结构进行可靠性分析,经过分析获得了其在置信度为95%且初值极限状态Z〈0(Z=σs-σmax),其中σs为材料的屈服强度,σmax为容器在使用过程中出现的最大应力)的情形下的概率平均值为3.264 8%,即说明容器的可靠度为96.735 2%,并绘制了Z在置信度为95%的情形下的分布图和输出结果参数的灵敏度图,通过此次分析证明了该固定管板式换热器管板与换热管结构是安全可靠的。 相似文献
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通过建立由壳体、管板以及换热管等构成的固定管板换热器有限元分析模型,研究了不同的制造技术对预应力换热器性能的影响,探讨了给定温度场下,两种预变形加载方式对管板强度的影响,得到了管板与管子连接局部应力随预变形变化的规律。研究发现,两种制造技术得到的预应力换热器都能显著降低管子与管板连接局部的应力集中,而分段加载技术具有更强的适应性和经济性。 相似文献
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主要利用ANSYS有限元软件对隔膜换热器的隔膜密封盘进行密封判断和应力分析,验证了密封结构的零泄漏密封,同时获得了密封结构的应力强度分布图,从图中得出密封盘位置并不是应力最大的部位,是安全可靠的,可应用在实际工程中.在获得线性化应力分析结果的基础上,通过定义路径对隔膜密封盘进行强度校核,经过分析计算后,获得了各路径上的... 相似文献
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焊接型板式传热器的紧凑性好、质量轻、传热性能好、初始成本低等优越性已越来越被人们所认识,因此人们纷纷对板式传热器内流动状态和传热机理展开研究。鉴于此,本文运用数值模拟软件Fluent对全焊接翅片板式传热器双流道进行模拟,在此基础上又进行了实验研究及实验数据与数值模拟的对比分析,得出不同结构参数和操作参数下翅片的传热系数和压力降,并分析翅片高度和翅片间距对翅片传热性能与流动阻力的影响。结果表明:①固定冷侧的入口速度和温度,热侧的传热系数和压降随之热侧入口速度增加而增大;②板间距一定时,翅片高度并非越高传热性能越好;③翅片间距越小,传热性能越好。 相似文献
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An analysis is presented for the main factors which control the intensity of vapor condensation in plate condenser channels, such as heat transfer both in single-phase stream of the coolant and in the condensate film, heat and mass transfer in gas-vapor phase, thermal resistance of fouling at heat transfer surface and pressure drop in condensing stream. On the basis of a relationship between the heat transfer and the wall shear stress, an approximate equation is obtained for calculating heat transfer from the pressure drop data. For calculation of heat transfer in condensate film during the condensation of high speed vapor, an analogy between heat and momentum transport has been used. An analysis of fouling deposition on heat transfer surface has been performed and an equation is presented for calculating the reduction of the fouling thermal resistance as compared with shell and lube heat exchangers. Experimental data are in good agreement with theoretical results. These data have shown the improvement of all the mentioned factors, which determine the intensity of the whole condensation process compared to the same factors in shell and tube condensers. Under the equal conditions, the required area of the heat transfer surface is reduced by 1.6 to 3 limes for the plate condenser, as compared with conventional shell and tube units. 相似文献
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An analysis is presented for the main factors which control the intensity of vapor condensation in plate condenser channels, such as heat transfer both in single-phase stream of the coolant and in the condensate film, heat and mass transfer in gas-vapor phase, thermal resistance of fouling at heat transfer surface and pressure drop in condensing stream. On the basis of a relationship between the heat transfer and the wall shear stress, an approximate equation is obtained for calculating heat transfer from the pressure drop data. For calculation of heat transfer in condensate film during the condensation of high speed vapor, an analogy between heat and momentum transport has been used. An analysis of fouling deposition on heat transfer surface has been performed and an equation is presented for calculating the reduction of the fouling thermal resistance as compared with shell and lube heat exchangers. Experimental data are in good agreement with theoretical results. These data have shown the improvement of all the mentioned factors, which determine the intensity of the whole condensation process compared to the same factors in shell and tube condensers. Under the equal conditions, the required area of the heat transfer surface is reduced by 1.6 to 3 limes for the plate condenser, as compared with conventional shell and tube units. 相似文献