太阳能辅助空冷机组互补发电系统热性能研究

Thermal Performance Researches of Solar Aided Air-Cooled Coal-Fired Power System

以槽式太阳能辅助600 MW直接空冷燃煤机组互补发电系统为研究对象,依据机组装机容量选择与其匹配的集热场面积,建立互补发电系统模型,对THA工况与75%THA工况时功率增大运行模式下取代第3级高加和取代2、3级高加这两种取代方式进行热性能计算分析。在此基础上,为进一步分析气象因素对互补发电系统热性能的影响,以THA工况功率增大运行模式下取代第3级高加抽汽为例研究,结果表明:DNI越大、风速越高、环境温度越低,互补发电系统的热力性能越好。

Researches on thermal performance of Solar Aided Feedwater Heating of Coal-fired Power Generation（SAFHCPG） are carried out based on a parabolic trough assisted 600 MW direct air-cooled coal-fired system.The SAFHCPG model is established according to unit capacity and the matching collector field area.The thermal performance is analyzed based on the replacements of No.3,No.2.3extraction steams replaced with THA and 75%THA condition under power boosting mode.In order to obtain the effects of weather conditions on the performance of SAFHCPG,the replacement of No.3,extraction steam replaced with THA condition is discussed as a case.The result shows that the stronger DNI,higher wind speed and lower ambient temperature contribute to better thermal performance.