1. Institute of Thermal Science and Power Engineering, Naval University of Engineering, Wuhan 430033,Hubei, China 2. Military Key Laboratory for Naval Ship Power Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China 3. College of Power Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China
Abstract:Based on dry slag granulation and heat recovery system of BF (blast furnace) slag, an air Brayton cycle driven by waste heat of BF slag is proposed. A finite time thermodynamic (FTT) model of this cycle is established and its heat recovery performance is studied. The effects of the compressor pressure ratio, the compressor inlet relative pressure drop and the heat recovery temperature on the power, the heat recovery efficiency and the thermal efficiency of the cycle are analyzed by numerical examples. It is found that the maximum power and heat recovery efficiency can be reached by adjusting the compressor pressure ratio and the compressor inlet relative pressure drop; The higher heat recovery temperature, the larger the power, the heat recovery efficiency and the thermal efficiency, and also the larger the permissible range of compressor pressure ratio and the compressor inlet relative drop. Moreover, by taking power as objective, the compressor pressure ratio and the compressor inlet relative pressure drop are optimized. Result shows that the maximum power is 51.46kW, the maximum heat recovery efficiency is 11.98% and the corresponding thermal efficiency is 20.70%.
收稿日期: 2014-11-24
出版日期: 2015-11-27
基金资助:国家重点基础研究发展计划(973)项目;国家自然科学基金
通讯作者:
陈林根
E-mail: lingenchen@hotmail.com
引用本文:
张泽龙 陈林根 杨博 戈延林 孙丰瑞 . 高炉渣余热驱动空气布雷顿循环热力学分析[J]. 中国冶金, 2015, 25(11): 16-21.
ZHANG Ze- long, , ,CHEN Lin- gen, , ,YANG Bo, , ,GE Yan- lin, , ,SUN Feng- rui , , . Thermodynamic analysis of an air brayton cycle driven by waste heat of BF slag. China Metallurgy, 2015, 25(11): 16-21.