槽式太阳能集热与燃煤热发电的高效集成  

High-efficient integration of trough solar energy collection and coal-burning power generation

作　　者：李金平[1] 张明紫[1] 邓育轩[1] 何坚[1] 

机构地区：[1]兰州理工大学太阳能与气体水合物研究中心,甘肃兰州730050

出　　处：《兰州理工大学学报》2010年第6期37-40,共4页Journal of Lanzhou University of Technology

基　　金：国家863计划(2007AA05Z261);甘肃省科技支撑计划(0804NKCA054);甘肃省重大专项(092NKDA035);甘肃省教育厅硕导基金(0803-06);兰州理工大学优秀青年教师培养计划项目(Q200801)的资助

摘　　要：为了研究槽式太阳能集热与燃煤热发电的高效集成方法,基于槽式太阳能集热器的最佳运行条件,建立300 MW燃煤机组与太阳能集热的混合发电系统,理论分析混合发电工况下机组的热力学性能和热经济性.结果表明,太阳能辐射强度为600 W/m2时,槽式集热器的最佳运行温度为306.55℃;300 MW燃煤发电机组中,离开槽式集热器的热水直接与回热器的热水混合时,太阳能热水与进入3#回热器的热水混合是槽式集热器与燃煤发电机组集成的最佳方案,此时太阳能热发电效率达到23.60%,节省煤耗5.53 g/(kW.h).In order to investigating a high-efficient integration method of trough solar energy collection and coal-fired power generation a 300 MW mixed power generation system composed of solar energy unit and coal-burning unit was set up on the basis of optimal condition of the operation of trough solar energy collector.Then,its thermodynamic and thermo-economical performances in the operational condition of mixed power generation were analyzed theoretically for the integrated system.The results showed that,when solar irradiation was 600 W/m2,the optimum operation temperature of the collector would be 306.55 ℃.In the mixed power generation unit,the heated water from trough collector would mix directly with water from heat regenerator.The best integration mode was as follows： the solar energy heated water should mix with water from 3# heat regenerator with a solar-to-electricity conversion as 23.6% and coal-saving as 5.53 g /（kW·h）.

关 键 词：太阳能热利用系统 最佳运行温度 集成方案 热经济性 

分 类 号：TK51[动力工程及工程热物理—热能工程]