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1000MW汽轮机缸效率能耗敏度分析

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Keywords: 1000MW汽轮机,汽缸效率,能耗敏度,耗差分析,节能诊断

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Abstract:

以东汽1000MW汽轮机为研究对象,采用汽轮机组定功率变工况计算方法,对汽轮机各汽缸效率在THA、70%THA、50%THA、40%THA滑压工况进行敏度分析,得到相应工况下各汽缸效率变化对汽轮机热耗率和机组发、供电煤耗率的影响规律。分析表明,缸效率的能耗敏度随缸效率变化基本呈线性关系;低压缸效率的能耗敏度最大,高压缸效率次之,中压缸效率较小;随机组负荷降低,高压缸效率的能耗敏度增加,中、低压缸效率的能耗敏度变化较小。在THA工况下低压缸效率下降1%,供电煤耗敏度绝对值增加1.246g/(.),相对值升高0.433%;高压缸效率下降1%,供电煤耗敏度的绝对值增加0.44g/(kW.h),相对值升高0.154%;中压缸效率下降1%,供电煤耗敏度的绝对值增加0.352g/(kW.h),相对值升高0.122%。分析结果可对同类型机组进行节能诊断,进而指导机组的优化运行。

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