1 000 MW等级湿冷机组回热级数优化研究
Optimization of Regenerative Stage Numbers for 1 000 MW Wet Cooling Units
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摘要:
为优化汽轮发电机组的给水回热系统，使循环热效率达到最高值，需根据汽轮机本体结构条件及锅炉给水温度限制，确定最佳的回热级数。对1 000 MW等级一次再热及二次再热湿冷机组的汽轮机特点、回热级数制约因素及经济性进行了研究，给出了1 000 MW等级湿冷机组的推荐回热级数。研究表明：现阶段1 000 MW等级一次再热和二次再热湿冷机组的最佳回热级数分别为9级和10级。 Abstract:To optimize regenerative extraction steam system for turbine-generator units and cycle heat efficiency, the reasonable regenerative stage numbers should be determined according to the turbine structure and boiler feed water temperature. Based on the characteristics of 1 000 MW single-reheat and double-reheat wet cooling turbine, constraints of the regenerative stage numbers and unit economy, the optimization of regenerative stage numbers are stated. The results show that the optimization of regenerative stage numbers for 1 000 MW single-reheat and double-reheat wet cooling turbine are nine level and ten level.
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