太阳能集热器耦合方式对太阳能燃气联合循环性能影响分析
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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、?效率、?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%,?效率提高4.3%,?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 CO_2 reduction is 24.083 million yuan and 20 047.5 t per year.
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 CO_2 reduction is 24.083 million yuan and 20 047.5 t per year.
引文
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[2]NAMI H,NEMATI A,JABBARI F.Conventional and advanced exergy analyses of a geothermal driven dual fluid organic Rankine cycle(ORC)[J].Applied Thermal Engineering,2017,122:59-70.
[3]唐强,曹伟伟,张力,等.太阳能与燃煤机组混合发电系统的热经济性分析[J].太阳能学报,2015,36(3):624-629.TANG Qiang,CAO Weiwei,ZHANG Li,et al.Study on thermal economy of solar-coal hybrid power generation units[J].Acta Energiae Solaris Sincia,2015,36(3):624-629.
[4]BAGHERNEJAD A,YAGHOUBI M,JAFARPUR K.Exergoeconomic optimization and environmental analysis of a novel solar-trigeneration system for heating,cooling and power production purpose[J].Solar Energy,2016,134:165-79.
[5]杨勇平,王梦娇,侯宏娟.太阳能辅助燃煤发电系统单耗模型及参数敏感性分析[J].太阳能学报,2015,36(8):2036-2041.YANG Yongping,WANG Mengjiao,HOU Hongjuan.Specific consumption model and parametric sensitivity analysis of solar aided coal-fired power generation system[J].Acta Energiae Solaris Sincia,2015,36(8):2036-2041.
[6]ZHONG W,CHEN X,ZHOU Y,et al.Optimization of a solar aided coal-fired combined heat and power plant based on changeable integrate mode under different solar irradiance[J].Solar Energy,2017,150:437-46.
[7]ALQAHTANI B J,PATIO-ECHEVERRI D.Integrated solar combined cycle power plants:paving the way for thermal solar[J].Applied Energy,2016,169:927-936.
[8]ACHOUR L,BOUHARKAT M,BEHAR O.Performance assessment of an integrated soalr combined cycle in the southern of Algeria[J].Energy Reports,2018,4:207-217.
[9]BRODRICK P G,BRANDT A R,DURLOFSKY L J.Optimal design and operation of integrated soalr combined cycles under emissions intensity constraints[J].Applied Energy,2018,226:979-990.
[10]刘仁志,李元媛,杨勇平.新型太阳能与燃气轮机联合循环互补系统集热场优化研究[J].工程热物理学报,2016,37(9):1817-1821.LIU Renzhi,LI Yuanyuan,YANG Yongping.The solar thermal collector field optimization research of a novel integrated solar combined cycle system[J].Journal of Engineering Thermophysics,2016,37(9):1817-1821.
[11]裴杰,赵苗苗,刘明义,等.太阳能与燃气-蒸汽联合循环发电系统优化[J].热力发电,2016,45(1):122-131.PEI Jie,ZHAO Miaomiao,LIU Mingyi,et al.Optimization of fresnel solar and gas-steam combined cycle hybrid power generation system[J].Thermal Power Generation,2016,45(1):122-131.
[12]李元媛,熊亚民,杨勇平.太阳能燃气联合循环发电系统能效优化与给水控制分析[J].工程热物理学报,2019,40(1):1-9.LI Yuanyuan,XIONG Yamin,YANG Yongping.The energy efficiency optimization and feedwater control analysis of integrated solar combined cycle[J].Journal of Engineering Thermophysics,2019,40(1):1-9.
[13]金红光,林汝谋.能的综合梯级利用与燃气轮机总能系统[M].北京:科学出版社,2008:38.JIN Hongguang,LIN Rumou.Comprehensive cascade utilization of energy and total energy system of gas turbine[M].Beijing:Science Press,2008:38.
[14]王树成,付忠广,张高强,等.基于先进?分析方法的燃气-蒸汽联合循环?损分析[J].热力发电,2019,48(3):75-79.WANG Shucheng,FU Zhongguang,ZHANG Gaoqiang,et al.Exergy destruction analysis of gas-steam combined cycle based on the advanced exergy analysis method[J].Thermal Power Generation,2019,48(3):75-79.
[15]MONTES M J,ABANADES A,MARTNEZ-VAL J M,et al.Solar multiple optimization for a solar-only thermal power plant,using oil as heat transfer fluid in the paraboilc trough collectors[J].Solar Energy,2009,83(12):2165-2176.
[16]LI Y,YANG Y.Thermodynamic analysis of a novel integrated solar combined cycle[J].Applied Energy,2014,122:133-142.
[17]BELLOS E,TZIVANIDIS C,BELESSIOTIS V.Daily performance of parabolic trough solar collectors[J].Solar Energy,2017,158:663-678.
[18]VANDANI A M K,JODA F,BOOZARJOMEHRY R B.Exergic,economic and environmental impacts of natural gas and diesel in operation of combined cycle power plants[J].Energy Conversion and Management,2016,109:103-112.
[19]上海市物价局关于调整本市非居民用户天然气价格的通知:沪价管[2018]22号[Z/OL].2018-06-19.[2019-04-16].http://www.shanghai.gov.cn/nw2/nw2314/nw2319/nw12344/u26aw56211.html.Circular of Shanghai Price Bureau on adjusting the price of natural gas for non-resident users in Shanghai:HJG[2018]No.22[Z/OL].2018-06-19.[2019-04-16].http://www.shanghai.gov.cn/nw2/nw2314/nw2319/nw12344/u26aw56211.html.