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中文摘要：
我国中小火电站面临增容降耗的任务,利用中温太阳能改造火电站给水加热器投资少,改动小,技术难度低,具有一定应用市场.本文提出了一种对135 MW火电机组进行改造的典型方案,分析研究了辐照强度变化时系统变工况运行中重要参数的变化情况,并揭示了其变化原因,初步分析了变辐照条件下系统的经济性能,对我国火电站的改造具有一定参考价值.
英文摘要：
Facing the task of expanding capacity and lowering ullage,small and medium scale coal-fired power plants in China can be repowered by low-grade solar heat with less change,lower investment and technical difficulty,leading to a promising application in the market.A typical approach to repower a 135 MW coal-fired power plant was proposed in this paper and the off-design performance of the repowered system with varying direct normal solar radiation was investigated.The reason for the changing regulation was given and a preliminary economic evaluation was estimated. The results would be useful for upgrading traditional plants in China.
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