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首页> 外文会议>Proceedings of the ASME power conference 2009 >Operation Improvement, Reliability and Performance Optimization with Analysis and Simulation
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Operation Improvement, Reliability and Performance Optimization with Analysis and Simulation

机译：通过分析和仿真提高运营，可靠性和性能优化

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Rapid development in computers has led to significant advancement in simulation technology. The analysis tools such as CFD and FEA are now household tools used for improving plant operations, building reliable equipment with enhanced safety features with an eye on improving and optimizing performance.rnIn this paper a few case studies are selectively presented to demonstrate the value of these tools to the customer -improved efficiency, reduced schedule times and cost. These examples are chosen to show how these technologies are used to identify and mitigate any safety and operational risks associated with plant design and improve the design over the projects life cycle.rnThe first example considers a design and operation improvement in a Heat recovery Steam generator (HRSG). To reduce material and equipment costs, it is very easy to designrnthe HRSG with sharp corners and steep angles from one module to another and keep them closer to each other. Thisrnessentially reduces the overall efficiency of the plant due to gas turbine exhaust flow non-uniformity and re-circulationrnzones. The existing flow correction device consisting of 32rnlarge tubes running across the sides produces a very large pressure drop. Using CFD, a flow distribution grid is designed, providing at least a 20% improvement in velocity distribution.rnThe second example considers a coal burning boiler performance optimization. In this boiler upgrade project, CFD is used to confirm the feasibility of increasing the capacity and reducing the particulate emissions of the coal fired furnace and steam boiler units. Some of these factors were difficult tornevaluate reliably using physical scale modeling techniques that were performed mainly only for cold flow pressure drop analysis. However the experimental results were used for benchmarking the CFD results.rnA third example shows how fluid dynamic analysis combined with thermal and structural analysis may be used to obtain the thermal fatigue life of various components of a molecular sieve dehydrator unit, where the design life is governed by the thermal loads generated during the regeneration cycle. Based on the fatigue analysis a more effective support is designed to withstand a higher flow capacity thus increasing production.
机译：计算机的飞速发展导致仿真技术的重大进步。现在，CFD和FEA等分析工具已成为家用工具，可用于改善工厂运营，构建具有增强安全功能的可靠设备，着眼于改善和优化性能。rn本文选择性地进行了一些案例研究，以证明这些工具的价值。提供给客户的工具-提高了效率，减少了计划时间和成本。选择这些示例以说明如何使用这些技术来识别和减轻与电厂设计相关的任何安全和操作风险，并在项目生命周期内改进设计.rn第一个示例考虑了余热回收蒸汽发生器的设计和操作改进（ HRSG）。为了降低材料和设备成本，很容易设计一个HRSG，使其从一个模块到另一个模块具有尖角和大角度，并使它们彼此靠近。由于燃气轮机排气流的不均匀性和再循环区域，这将显着降低电厂的整体效率。现有的流量校正装置由32个跨侧面的大管组成，会产生很大的压降。使用CFD设计了一个流量分配网格，可以使速度分布至少提高20％。第二个示例考虑了燃煤锅炉性能的优化。在此锅炉升级项目中，CFD用于确认提高燃煤炉和蒸汽锅炉单元的容量并减少颗粒物排放的可行性。这些因素中的某些因素很难使用物理比例建模技术可靠地重新评估，而物理比例建模技术主要仅用于冷流压降分析。但是，将实验结果用作CFD结果的基准。第三个示例显示了如何将流体动力学分析与热分析和结构分析相结合来获得分子筛脱水器单元各个组件的热疲劳寿命，其中设计寿命为由再生循环中产生的热负荷控制。基于疲劳分析，可以设计出更有效的支撑以承受更高的流量，从而提高产量。

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