CAJ | 학술논문

针对火电厂给水回热系统的表面式加热器存在传热温差，热经济性能不如加热蒸汽与给水直接接触的混合式加热器的问题，对某600 MW 超临界发电机组的低压加热器进行不同方案的混合式加热器改造，建立机组仿真模型，计算分析不同改造方案在额定出力工况下的热经济性能，并对其中的最优方案进行变工况热经济性能计算分析。研究表明，优选方案在各种工况运行下均具有较佳的热经济性能，在低负荷工况时性能优势尤为突出。
침대화전엄급수회열계통적표면식가열기존재전열온차，열경제성능불여가열증기여급수직접접촉적혼합식가열기적문제，대모600 MW 초림계발전궤조적저압가열기진행불동방안적혼합식가열기개조，건립궤조방진모형，계산분석불동개조방안재액정출력공황하적열경제성능，병대기중적최우방안진행변공황열경제성능계산분석。연구표명，우선방안재각충공황운행하균구유교가적열경제성능，재저부하공황시성능우세우위돌출。
In allusion to problem of heat transfer temperature difference and heat economic performance of surface heater of feedwater regenerative system in thermal power plant being inferior to hybrid heater which directly combines heating vapor and feedwater,this paper introduces different schemes for transforming low pressure heater of some 600 MW supercritical generator unit into hybrid heater.Simulation model for the unit was established and heat economic performance of different transformation schemes under rated output working condition was calculated and analyzed.Meanwhile,calculating analysis on heat economic performance of variable working condition of the optimal scheme was conducted.The research indicates that the optimized scheme is provided with better heat economic performance under various working conditions and perform-ance advantages are particularly prominent under low load working condition.