摘要
根据"能量互补,梯级利用"原则,对太阳能燃气联合循环中太阳能集热器出口过热蒸汽与余热锅炉3种耦合方式的性能进行了研究,对比分析了3种耦合方式下系统燃料消耗量、燃料基热效率、[火用]效率、[火用]损率、化石燃料节约率及不同集热场出口蒸汽温度对系统性能的影响。结果表明:太阳能集热器出口过热蒸汽接入到余热锅炉的高压蒸发器出口时,具有较高的热力性能,与没有投入太阳能集热器相比,燃料消耗量降低1.12 kg/s,燃料基热效率提高4.6%,[火用]效率提高4.3%,[火用]损率降低5.2%,节约化石燃料率为7.7%;此外,通过经济性分析可知,采用上述耦合方式每年可节约燃料费用2408.3万元,减少CO2排放量20 047.5 t。
According to the principle of "energy complementarity and cascade utilization", the performance of three coupling modes between the superheated steam at the solar collector outlet and the heat recovery steam generator in an integrated solar combined cycle is investigated. The effects of several factors, such as fuel consumption, fuel-based thermal efficiency, exergy efficiency, exergy loss rate, fossil fuel saving rate and superheated steam temperature at the solar collector outlet, on the performance of the proposed system were compared. The results show that, coupling the superheated steam of the solar field to the outlet of the high-pressure evaporator of the heat recovery steam generator shows a perfect performance. Compared with the conventional combined cycle power plant with no solar field, the fuel consumption reduces by 1.12 kg/s, the fuel-based thermal efficiency increases by 4.6%, the exergy efficiency increases by 4.3%, the exergy loss rate reduces by 5.2%, and the fossil fuel saving rate reduces by 7.7%. In addition, the economic analysis reveals that the fuel saving cost and CO2 reduction is 24.083 million yuan and 20 047.5 t per year.
作者
王树成
付忠广
高学伟
高玉才
张高强
WANG Shucheng;FU Zhongguang;GAO Xuewei;GAO Yucai;ZHANG Gaoqiang(Key Laboratory of Condition Monitoring and Control for Power Plant Equipment,North China Electric Power University Beijing 102206,China)
出处
《热力发电》
CAS
北大核心
2019年第7期32-38,共7页
Thermal Power Generation
基金
中央高校基本科研业务费专项资金资助(2018QN035)
北京市自然科学基金项目(3162030)~~
