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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >A novel approach to improving load flexibility of coal-fired power plant by integrating high temperature thermal energy storage through additional thermodynamic cycle
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A novel approach to improving load flexibility of coal-fired power plant by integrating high temperature thermal energy storage through additional thermodynamic cycle

机译：一种新的方法来提高燃煤发电厂负荷灵活性通过额外的热力学循环整合高温热能储存

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摘要

This work presents a novel approach to improving the load flexibility of coal-fired power plant by integrating high temperature thermal energy storage (HTTES) through additional thermodynamic cycle. It aims to investigate the feasibility of introducing an HTTES-aided additional cycle into the steam-water cycle of conventional coal-fired power plant and to test how a high round-trip efficiency can be achieved with the HTTES integration. The thermal system and operation mode of an HTTES-aided coal-fired power plant were described. The performance evaluation model was built and its performance was discussed based on a 600 MW subcritical coal-fired power plant model. The results show that the proposed approach is feasible to improve the load flexibility of the conventional coal-fired power plant. An additional net power can be obtained while the original unit works at its rated condition. The initial steam pressure of the additional cycle is the determining factor for the round-trip efficiency and a round-trip efficiency of 44.18% can be obtained. This work is expected to provide a detailed reference on the use of HTTES system to improve the load flexibility of coal-fired power plants and further to relieve the serious problem of the curtailment for fluctuating renewable power generation in China.
机译：这项工作提高了一种新的方法来提高燃煤发电厂的负荷灵活性通过将高温热能储存（HTTE）通过额外的热力学循环整合。它旨在探讨将HTTES辅助额外循环引入传统燃煤发电厂的蒸汽水循环的可行性，并测试如何通过HTTES集成实现如何实现高往返效率。描述了HTTES-辅助燃煤发电厂的热系统和操作模式。构建了性能评估模型，并基于600 MW亚临界燃煤电厂模型讨论了其性能。结果表明，提出的方法是可行的，可以提高传统燃煤发电厂的负荷灵活性。在原始单元在其额定条件下工作时，可以获得额外的净功率。额外循环的初始蒸汽压力是往返效率的确定因素，可以获得44.18％的往返效率。这项工作有望为使用HTTES系统提供详细参考，以提高燃煤发电厂的负荷灵活性，进一步缓解中国波动波动的缩减严重问题。

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