中低温太阳热能与化石能源互补系统的参数敏感性分析  

Parametric Sensitivity Analysis of a Hybrid System With Low/Mid-temperature Solar Thermal Energy and Fossil Fuel Inputs

作　　者：罗尘丁[1] 张娜[1] 蔡睿贤[1] 

机构地区：[1]中国科学院工程热物理研究所,北京市海淀区100190

出　　处：《中国电机工程学报》2012年第20期69-75,141,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50836005;51076152);973国家重点基础研究发展计划项目(2010CB227301)~~

摘　　要：SOLRGT系统是基于间冷化学回热循环的一种新型中低温太阳能与化石能源互补系统,它使中低温太阳能品位间接得以提升,借助先进燃气轮机系统实现高效热功转换,化石能源节约率可达20%~30%。基本工况下相比同输入的单输入发电系统（槽式太阳能热发电、燃气蒸汽联合循环）,发电成本下降了16.6%。为进一步研究SOLRGT的热力经济性能,选取太阳能输入份额Xsol、太阳倍数SM（系统年运行时间H）、单输入化石能源参比系统（燃气蒸汽联合循环）年运行时间HCC、工程各部分造价、天然气价、电价为不确定因素,分析SOLRGT发电成本、相对成本节约率、回收期的变化规律。研究表明：系统发电成本随着Xsol增大而增大;HCC4≤300 h（基本工况）或者SM≥2（Xsol=20.3%）时,SOLRGT系统的发电成本低于单输入系统;太阳能相关设备造价对发电成本影响最大。Based on the inter-cooling chemically recuperated gas turbine cycle,SOLRGT is a novel hybrid system with low/mid-temperature solar thermal energy and fossil fuel inputs.The energy-level of the solar heat could be upgraded indirectly,and the high-efficiency conversion of solar heat into power could be achieved.The relative fossil energy saving rate reaches 20%~30%.In base case,the electricity cost of SORGT decreased 16.6% compared to the single-input power systems with the same energy inputs.For further study of thermal and economic performances of SOLRGT,solar thermal share Xsol,solar multiple SM（annual operation time H）,annual operation time of single-input fossil fuel reference system（combined cycle） HCC,equipment costs,methane and electricity prices were chosen to be variable factors,and the change regularities of the electricity cost,relative cost-saving rate,and payback period of SOLRGT were studied.Researches show that： the electricity cost of SOLRGT increases while Xsol increasing,and will be lower than that of single-input power systems when HCC≤4300h（in the base case） or SM≥2（Xsol=20.3%）.Meanwhile,the solar block cost of SOLRGT system has the most significant influences on its electricity cost.

关 键 词：多能源互补系统 敏感性分析 经济性分析 太阳能 化学回热循环 发电成本 

分 类 号：TK123[动力工程及工程热物理—工程热物理]