共查询到20条相似文献,搜索用时 171 毫秒
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板翅式换热器是舰载燃气轮机首选换热器形式。针对平直型翅片的矩形通道的结构特点,建立了流动换热分析的耦合计算模型,采用计算流体动力学(CFD)方法对间冷器的通道流场进行了数值模拟。给出并分析了计算区域内多个截面的温度、压力、速度、局部传热系数等参数的分布图形和变化趋势,并考察了不同工况下间冷器的工作能力。 相似文献
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利用计算流体力学(computational fluid dynamics,CFD)软件Fluent对某板翅式油冷器进行仿真计算分析,得到油冷器压力场、温度场和流场的分布情况,评价该油冷器的工作性能并保证其工作的可靠性。根据油冷器性能试验选取3组不同的工况进行模拟计算,并将模拟结果与试验结果进行对比,仿真结果表明:在误差容限范围内,仿真数据与试验结果吻合良好,仿真方法合理。 相似文献
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CFD方法与间接蒸发冷却换热器的三维数值模拟 总被引:2,自引:0,他引:2
采用计算流体力学(CFD)和数值传热学方法,对间接蒸发冷却器内流体流动与热质交换过程进行简化和假设,建立了换热器内三维层流流动与传热的数学物理模型。采用交错网格离散化非线性控制方程组,编制了三维simple算法程序。对间接蒸发冷却器内的流场、温度场及浓度场进行数值模拟研究,得到换热器内的流体流动状态和热流分布,并分析了通道宽度变化对换热器内流体流动与换热的影响。 相似文献
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本文对椭圆管与扁管管板式换热器的充分发展的周期性层流流动与换热特性进行了数值计算分析,给出了在400相似文献
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介绍了管壳式换热器的换热管强化传热技术,分析了各自的原理、优缺点及推荐的使用场合。采用节能技术的换热器不仅提高了能源的利用率,而且减少了金属材料的消耗,对化工行业提高经济效益具有重要意义。 相似文献
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Janusz Lichota Krzysztof Polko Kazimierz Wojs 《能源与动力工程:英文版》2014,(9):1511-1542
The paper shows a method of designing a heat exchanger recovering heat from the condensation of water vapour contained in flue gases. A heat exchanger condenses water vapour and SO2 (sulphur dioxide) in the presence of inert gases (CO2, CO, N2, O2) contained in flue gases. A mathematical model and a sample design of a heat exchanger were presented. The heat exchange is capable of recovering from a dozen or so to several dozen percent of heat from flue gases escaping into the atmosphere. A second advantage of the heat exchanger is the possibility to reduce the emissions of SO2 considerably. Depending on the parameters, it can be even a sevenfold reduction in the emissions. The main mathematical tool used for designing the condensing heat exchanger is the Colburn-Hougen method. The authors omitted that part of the method which requires iterative calculations. The Mollier diagram was used instead. 相似文献
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The RODbaffle exchanger offers a solution to the vexing problem of tube failures in shell-and-tube exchangers resulting from tube vibration. Additional benefits are good heat transfer rates, low pressure drop, and lower fouling rates. The ratio of heat transfer rate to pressure drop can be more than double that of the conventional plate-type baffle in a comparable application. 相似文献
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A heat exchanger network (HEN) is the heart of a heat-integrated plant, and classical synthesis methologies assume all design operating conditions are constant values and overlook controllability issues. The controllability measures presented in this paper are intended to assess the controllability of a HEN through a simple and comprehensive methodology consisting of five steps that allows an easy screening process to determine a more controllable HEN. 相似文献
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多钻孔竖直U型埋管换热器传热研究 总被引:1,自引:0,他引:1
以地源热泵地下U型埋管四钻孔换热器为研究对象,利用有限元计算方法,编制程序,模拟分析了系统运行时间及钻孔顺序排列和交叉排列时钻孔间距和布置形式对土壤温度场的影响。结果表明:随着运行时间的增长,热干扰现象越强烈,热干扰主要发生在钻孔之间,在两钻孔中间影响最大;从土壤能源利用均衡性角度来讲钻孔交叉排列的形式优于顺序排列的形式。 相似文献