NIU Zhongmin1, DING Yiyu2 1.Henan Province Electric Power Surney and Design Institute. ANALYSIS OF THERMAL ECONOMY OF INSTALLING EXTERNAL STEAM COOLER FOR ULTRA-SUPERCRITICAL 1000MW UNIT[J]. Thermal power generation, 2011, 40(12): 67-69.
NIU Zhongmin1, DING Yiyu2 1.Henan Province Electric Power Surney and Design Institute. ANALYSIS OF THERMAL ECONOMY OF INSTALLING EXTERNAL STEAM COOLER FOR ULTRA-SUPERCRITICAL 1000MW UNIT[J]. Thermal power generation, 2011, 40(12): 67-69.DOI:
超超临界1000MW机组设置外置蒸汽冷却器的热经济性分析
摘要
针对某超超临界1 000MW机组
提出了采用串联外置式蒸汽冷却器利用第3级抽汽过热度提高锅炉给水温度的方案。基于热力系统矩阵分析法
对该方案进行了热经济性分析。分析表明
设置外置式蒸汽冷却器可提高锅炉给水温度4.9℃
汽轮机绝对内效率相对设置前提高了0.24%
降低发电标准煤耗率约0.65g/(kW.h)
经济效益显著。
Abstract
Directing against one ultra-supercritical 1 000 MW unit
a scheme for enhancing the temperature of feed-water for boilers by using the superheat degree of the third-stage extraction steam from the external steam cooler connected in series has been put forward.Based on matrix analysis method of the thermal system
the thermal economy of said scheme has been analysed.Analysis shows that the installation of external steam cooler can enhance the temperature of feed-water for boilers by 49 ℃
the absolute internal efficiency of steam turbine relatively rose 0.24%
the standard coal consumption for power generation reduced about 0.65 g/(kW·h)