新型CO_2近零排放中低温太阳能化石能源互补系统研究  

A Novel Zero CO_2 Emission Solar Heat-Fossil Fuel Hybrid System

作　　者：罗尘丁[1,2] 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,北京100190 [2]国核电力规划设计研究院,北京100195

出　　处：《工程热物理学报》2012年第12期2015-2019,共5页Journal of Engineering Thermophysics

基　　金：973国家重点基础研究发展计划(No.2010CB227301);国家自然科学基金项目(No.50836005;No.51076152)

摘　　要：本文提出了新的CO_2近零排放中低温太阳能化石能源互补系统(ZE-SOLRGT)并对其进行了热力性能分析。该系统在SOLRGT系统基础上引入纯氧燃烧,构成以水为工质的准联合循环。中低温太阳能集热与水蒸发过程相集成,改善了换热匹配,增大了工质流量,提高了输出功与热效率;并通过热化学反应品位得以提升,最终借由燃机循环实现高效热功转换。系统以低能耗实现了CO_2近零排放。研究表明ZF-SOLRGT相对SOLRGT尾气排放(火用)损减少了50.5%,热效率提高了3.6%,实现了CO_2分离与能源高效利用的一体化集成。A novel zero CO2 emission low/mid-temperature solar heat-fossil fuel hybrid system, ZE-SOLRGT, has been proposed and analyzed. Based on the SOLRGT system and oxy-fuel com- bustion, ZE-SOLRGT is a quasi-combined cycle with water being the working fluid. The integration of solar-driven steam production helps improve both the chemical and thermal recuperation in the system, and thus contributes to system work output and efficiency enhancement. The low-mid temperature solar heat is upgraded partially into chemical exergy via the thermo-chemical reaction and achieves high efficiency conversion in the advanced power system. CO2 capture is accomplished with oxy-fuel combustion with low energy penalty. Research shows that compared with SOLRCT system, the exegy loss of flue gas in ZE-SOLRGT decreases by 50,5%, and the thermal efficiency increases by 3.6%-points. ZE-SOLRCT achieves good integration of CO2 capture and effective energy ntilizatinn.

关 键 词：多能源互补系统 太阳能 系统集成 热力性 经济性 

分 类 号：TK123[动力工程及工程热物理—工程热物理]