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首页> 外文期刊>Polish maritime research >Analysis of application of feed-water injector heaters to steam power plants
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Analysis of application of feed-water injector heaters to steam power plants

机译：给水喷射加热器在蒸汽发电厂中的应用分析

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Steam-water injectors are devices in which exchange of mass, momentum and energy between two fluids being in direct contact, occurs. They can operate as pumps, mixers or direct contact heat exchangers. In the last aspect their use as feed-water heaters in Rankine thermal cycle of steam power plants both in land and sea applications (to merchant and naval ships) is very interesting. This paper presents selected results of heat-and-flow investigations of a supercritical steam-water injector, obtained in Institute of Fluid Flow Machinery, Polish Academy of Sciences (IMP PAN). On their basis value of average heat transfer coefficient for mixing chamber was determined; the obtained values were even a few dozens greater than those for classical shell-and-tube heaters. In the theoretical part of this work is presented an original injector model based on balances of mass, momentum and energy, written for control volumes containing separately particular elements of injector. On the basis of the model flow parameters in characteristic cross-sections of injector were determined. The calulations were performed for two different injectors tested in IMP PAN (Gda??sk) and SIET (Piacenza, Italy), and their good compliance with experimental data was achieved.
机译：蒸汽-水喷射器是其中直接接触的两种流体之间发生质量，动量和能量交换的装置。它们可以用作泵，混合器或直接接触式热交换器。最后，在陆上和海上应用（对商船和海军舰船）中，它们用作蒸汽发电厂兰金热循环中的给水加热器非常有趣。本文介绍了从波兰科学院流体流动机械研究所（IMP PAN）获得的超临界蒸汽-水注射器的热流研究结果。根据它们的平均值，确定混合室的平均传热系数。所获得的值甚至比传统的管壳式加热器高几十倍。在这项工作的理论部分中，提出了一种基于质量，动量和能量平衡的原始喷油器模型，该模型针对包含多个特定喷油器元素的控制体积而编写。基于该模型，确定了喷射器的特征截面中的流动参数。对在IMP PAN（Gda ?? sk）和SIET（意大利皮亚琴察）测试的两种不同的进样器进行了计算，并获得了与实验数据的良好一致性。

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