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Investigation of a single-reheat condensing steam power plant based on energy and exergy analysis

机译：基于能量和火用分析的单重热凝汽电厂研究

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摘要

Nowadays, energy plays an important role in the economic and community development of country. Consequently, performance analysis of energy systems is one of the effective methods being used to prevent waste of energy resources. Among the different power generation technologies, steam power plants make a significant contribution to power generation in Iran, with a share of 47 % of electricity generation. Therefore, it seems that exergy analysis of the power plant can help designers to reduce energy losses and increase efficiency. In this study, energy and exergy analysis of a single-reheat steam power plant in Iran is presented. This analysis considered the effect of environment temperature variation on the energy and exergy efficiencies. The results showed that the condenser has most energy losses (50%) in a cycle, while maximum exergy destruction (84%) occurs in the boiler. The thermal and exergy efficiencies at reference temperature were computed as 36.84% and 34.75%, respectively. Exergy destruction and efficiency of each component have been considered and are reported in the paper. The effects of various parameters such as steam pressure, steam temperature and condenser pressure have also been examined in the cycle performance.
机译：如今，能源在国家的经济和社区发展中发挥着重要作用。因此，能源系统的性能分析是用于防止浪费能源的有效方法之一。在不同的发电技术中，蒸汽发电厂为伊朗的发电做出了巨大贡献，占发电量的47％。因此，发电厂的火用分析似乎可以帮助设计人员减少能量损失并提高效率。在这项研究中，介绍了伊朗的一次再热蒸汽发电厂的能量和火用分析。该分析考虑了环境温度变化对能量和火用效率的影响。结果表明，冷凝器在一个循环中的能量损失最多（50％），而锅炉的最大火用破坏（84％）发生了。计算得出参考温度下的热效率和火用效率分别为36.84％和34.75％。已经考虑了火用成分的破坏和效率，并在论文中进行了报道。在循环性能中还检查了各种参数的影响，例如蒸汽压力，蒸汽温度和冷凝器压力。

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