高炉冲渣水余热驱动两级热电发电装置FTT分析  

Finite time thermodynamic analysis for two-stage thermoelectric generator device driven by blast furnace slag flushing water waste heat

作　　者：熊兵[1] 陈林根[1] 孟凡凯[1] 孙丰瑞[1] 

机构地区：[1]海军工程大学 热科学与动力工程研究室 舰船动力工程军队重点实验室 动力工程学院,湖北武汉430033

出　　处：《钢铁研究》2014年第4期33-37,共5页Research on Iron and Steel

基　　金：国家重点基础研究发展计划(973)项目(2012CB720405);国家自然科学基金(11305266)

摘　　要：建立了高炉冲渣水余热驱动两级热电发电装置的有限时间热力学模型,分析了热源温度沿程变化的条件下冲渣水温度、对流换热系数、流道长度等参数对装置功率、效率、最大功率、最大效率和最优负载比的影响,并给出了协调最大功率和最大效率的电流范围。结果表明:对于100℃的高炉冲渣水,负载电阻匹配时,最大功率和最大效率分别为0.55kW和3.22%,且最大功率时的负载比约为1.2。A finite time thermodynamics （FTT）model of two-stage thermoelectric generator device driven by blast furnace slag flushing water waste heat is established. In the case of the temperatures of heat reservoirs change over flow passage, the effects of slag flushing water inlet temperature, convective heat transfer coefficient and flow passage length on the power output, efficiency, maximum power output and maximum efficiency as well as optimal resistance ratio are analyzed. Moreover, the electrical current range corresponding to the maximum power output and maximum efficiency are obtained. Results show that the maximum power output of 0. 55 kW and maximum efficiency of 3.22% are available for blast furnace slag flushing water of 100℃ if load resistance is matched. The optimal resistance ratio corresponding to the maximum power output is about 1.2.

关 键 词：变温热源 高炉冲渣水 余热利用 

分 类 号：TK12[动力工程及工程热物理—工程热物理]