底循环系统参数对燃气—蒸汽联合循环机组经济性的影响
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摘要
采用APROS软件建立了PG9171E型燃气—蒸汽联合循环机组系统仿真模型,分析底循环系统高压蒸汽压力、高、低压蒸汽温度、凝汽器排汽压力对联合循环机组经济性的影响。研究表明:提高蒸汽参数,机组热耗率下降;高压蒸汽压力与机组热耗率近似呈二次函数关系;额定负荷工况下,高压蒸汽温度上升1℃,机组热耗率下降约2.57 kJ/(kW·h);而低压蒸汽温度上升1℃,机组热耗率下降约0.40 kJ/(kW·h);降低凝汽器排汽压力,有利于提高联合循环机组的经济性,但需协调考虑末级叶片运行的安全性和联合循环机组的经济性。
The simulation model for the PG9171 E gas-steam combined cycle unit is established by using advanced process software(Apros)in this paper. Then,the influence of high-pressure steam pressure,high-pressure and low-pressure steam temperature and condenser vacuum on the economic performance of combined cycle unit is analyzed. The results show that,with higher steam parameters,the heat rate of combined cycle unit decreases. The relative change rate of combined cycle unit heat rate is approximately quafratic in relation to the variable quantity of high-pressure steam pressure. Under rated load condition,as the high-pressure steam temperature is increased by 1 ℃,the combined cycle unit heat rate is reduced by about 2.57 kJ/(kW·h). However,as the low-pressure steam temperature is increased by 1 ℃,the combined cycle unit heat rate is decreased by only about 0.40 kJ/(kW·h). Reducing the condenser vacuum can help to improve the efficiency of the combined cycle unit,while we should consider the operation safety of the last stage blades.
The simulation model for the PG9171 E gas-steam combined cycle unit is established by using advanced process software(Apros)in this paper. Then,the influence of high-pressure steam pressure,high-pressure and low-pressure steam temperature and condenser vacuum on the economic performance of combined cycle unit is analyzed. The results show that,with higher steam parameters,the heat rate of combined cycle unit decreases. The relative change rate of combined cycle unit heat rate is approximately quafratic in relation to the variable quantity of high-pressure steam pressure. Under rated load condition,as the high-pressure steam temperature is increased by 1 ℃,the combined cycle unit heat rate is reduced by about 2.57 kJ/(kW·h). However,as the low-pressure steam temperature is increased by 1 ℃,the combined cycle unit heat rate is decreased by only about 0.40 kJ/(kW·h). Reducing the condenser vacuum can help to improve the efficiency of the combined cycle unit,while we should consider the operation safety of the last stage blades.
引文
[1] 王巍,李扬,王晓放,等.燃气-蒸汽联合循环底循环全工况设计分析[J].燃气轮机技术,2015,28(3):38-43.WANG Wei,LI Yang,WANG Xiao-fang,et al.Design and performance analysis of bottom cycle system in gas-steam combined cycle at all operation condition[J].Gas Turbine Technology,2015,28(3):38-43.
[2] 郑炯智,张国强,许彦平,等.顶底循环参数对燃气–蒸汽联合循环全工况性能影响分析[J].中国电机工程学报,2016,36(23):6418-6431.ZHENG Jiong-zhi,ZHANG Guo-qiang,XU Yan-ping,et al.Analysis of topping and bottoming cycle parameters on the performance of the combined cycle at design/off-design condition[J].Proceedings of the CSEE,2016,36(23):6418-6431.
[3] 董帅,弓学敏,崔厚品,等.双压无再热联合循环系统热力参数优化分析[J].应用能源技术,2016(11):15-19.DONG Shuai,GONG Xue-min,CUI Hou-pin,et al.Optimization of thermodynamic parameters of double pressure non reheating combined cycle system[J].Applied Energy Technology,2016(11):15-19.
[4] ANGERERM,KAHLERT S,SPLIETHOFF H.Transient simulation and fatigue evaluation of fast gas turbine startups and shutdowns in a combined cycle plant with an innovative thermal buffer storage[J].Energy,2017,130.
[5] 陈晓利,吴少华,李振中,等.整体煤气化联合循环三压再热底循环系统变工况特性[J].中国电机工程学报,2010,30(23):8-13.CHEN Xiao-li,WU Shao-hua,LI Zhen-zhong,et al.Off-design characteristics of three-pressure with reheat bottom cycle system in integrated gasification combined cycle[J].Proceedings of the CSEE,2010,30(23):8-13.
[6] Technical research centre of Finland.APROS overview[EB/OL].http://www.apros.fi/en/brochures_papers,2009-09.
[7] ALOBAIDF,STARKLOFF R,PFEIFFER S,et al.A comparative study of different dynamic process simulation codes for combined cycle power plants-Part A:loads and off-design operation[J].Fuel,2015(153):692-706.
[8] STEINKER J.STGSTK:A computer code for predicting multistage axial flow compressor performance by a meanline stage stacking method[R].NASA-TP-2020.
[9] 夏迪,王永泓.PG9171E型燃气轮机变工况计算模型的建立[J].热能动力工程,2008,23(4):338-343.XIA Di,WANG Yong-hong.The establishment of PG9171E type gas turbine varying condition[J].Journal of Engineering for Thermal Energy and Power,2008,23(4):338-343.
[10] CONSONNI,LOZZA,MACCHI.Turbomachinery and off-design aspects in steam-injected gas cycles[C].23rd Intersociety Energy Conversion Engineering Conference,1988:99-108.
[11] 陈道轮.平圩电厂600 MW锅炉系统动态仿真[D].江苏:东南大学,2005.CHEN Dao-lun.Dynamic simulation of pingwei power plant 600 MW boiler system[D].Jiangsu:Southeast University,2005.
[12] 刘冰,彭淑宏.某重型燃气轮机动态建模及性能仿真研究[J].计算机仿真,2012,29(9):335-338.LIU Bing,PENG Shu-hong.Dynamic modeling and simulation on heavy duty gas turbine[J].Computer Simulation,2012,29(9):335-338.
[13] 杨世铭,陶文铨.传热学[M].第4版.北京:高等教育出版社,2006.YANG Shi-ming,TAO Wen-quan.Heat Transfer Edition[M].The Fourth.Beijing:Higher Education Press,2006.
[14] GNIELINSKIV.New equations for heat and mass transfer in turbulent pipe and channel flows[J].Nasa Sti/recon Technical Report A,1976,75(2):8-16.
[15] KATTANN,THOME J R,FAVRAT D.Flow boiling in horizontal tubes:part 3-development of a new heat transfer model based on flow pattern[J].Journal of Heat Transfer,1998,120(1):156-165.
[16] 李维特,黄保海.汽轮机变工况热力计算[M].北京:中国电力出版社,2001.LI Wei-te,HUANG Bao-hai.thermodynamic calculation of steam turbine under variable conditions[M].Beijing:China Electric Power Press,2001.
[17] 赵士杭,叶海文.压气机静叶可调对燃气轮机和联合循环变工况性能的影响[J].热能动力工程,1990(6):1-4.ZHAO Shi-hang,YE Hai-wen.The effect of variable compressor vanes on gas turbine and combined cycle power plant off-design performance[J].Journal of Engineering for Thermal Energy and Power,1990(6),1-4.
[18] 焦树建.论余热锅炉型联合循环中双压再热式余热锅炉的特性与汽轮机特性的优化匹配问题[J].燃气轮机技术,2001,14(2):14-23.JIAO Shu-jian.discussion on optimization matching between steam turbine characteristics and dual pressure reheat recovery steam generator characteristics in combined cycle gas turbine[J].Gas Turbine Technology,2001,14(2):14-23.
[19] 王艳军.初终参数变化对能耗影响的定量分析方法研究[D].河北:华北电力大学,2008.WANG Yan-jun.Method of quantitative analysis study of effect on energy cost of initial and final parameters[D].Hebei:North China Electric Power University,2008.
[2] 郑炯智,张国强,许彦平,等.顶底循环参数对燃气–蒸汽联合循环全工况性能影响分析[J].中国电机工程学报,2016,36(23):6418-6431.ZHENG Jiong-zhi,ZHANG Guo-qiang,XU Yan-ping,et al.Analysis of topping and bottoming cycle parameters on the performance of the combined cycle at design/off-design condition[J].Proceedings of the CSEE,2016,36(23):6418-6431.
[3] 董帅,弓学敏,崔厚品,等.双压无再热联合循环系统热力参数优化分析[J].应用能源技术,2016(11):15-19.DONG Shuai,GONG Xue-min,CUI Hou-pin,et al.Optimization of thermodynamic parameters of double pressure non reheating combined cycle system[J].Applied Energy Technology,2016(11):15-19.
[4] ANGERERM,KAHLERT S,SPLIETHOFF H.Transient simulation and fatigue evaluation of fast gas turbine startups and shutdowns in a combined cycle plant with an innovative thermal buffer storage[J].Energy,2017,130.
[5] 陈晓利,吴少华,李振中,等.整体煤气化联合循环三压再热底循环系统变工况特性[J].中国电机工程学报,2010,30(23):8-13.CHEN Xiao-li,WU Shao-hua,LI Zhen-zhong,et al.Off-design characteristics of three-pressure with reheat bottom cycle system in integrated gasification combined cycle[J].Proceedings of the CSEE,2010,30(23):8-13.
[6] Technical research centre of Finland.APROS overview[EB/OL].http://www.apros.fi/en/brochures_papers,2009-09.
[7] ALOBAIDF,STARKLOFF R,PFEIFFER S,et al.A comparative study of different dynamic process simulation codes for combined cycle power plants-Part A:loads and off-design operation[J].Fuel,2015(153):692-706.
[8] STEINKER J.STGSTK:A computer code for predicting multistage axial flow compressor performance by a meanline stage stacking method[R].NASA-TP-2020.
[9] 夏迪,王永泓.PG9171E型燃气轮机变工况计算模型的建立[J].热能动力工程,2008,23(4):338-343.XIA Di,WANG Yong-hong.The establishment of PG9171E type gas turbine varying condition[J].Journal of Engineering for Thermal Energy and Power,2008,23(4):338-343.
[10] CONSONNI,LOZZA,MACCHI.Turbomachinery and off-design aspects in steam-injected gas cycles[C].23rd Intersociety Energy Conversion Engineering Conference,1988:99-108.
[11] 陈道轮.平圩电厂600 MW锅炉系统动态仿真[D].江苏:东南大学,2005.CHEN Dao-lun.Dynamic simulation of pingwei power plant 600 MW boiler system[D].Jiangsu:Southeast University,2005.
[12] 刘冰,彭淑宏.某重型燃气轮机动态建模及性能仿真研究[J].计算机仿真,2012,29(9):335-338.LIU Bing,PENG Shu-hong.Dynamic modeling and simulation on heavy duty gas turbine[J].Computer Simulation,2012,29(9):335-338.
[13] 杨世铭,陶文铨.传热学[M].第4版.北京:高等教育出版社,2006.YANG Shi-ming,TAO Wen-quan.Heat Transfer Edition[M].The Fourth.Beijing:Higher Education Press,2006.
[14] GNIELINSKIV.New equations for heat and mass transfer in turbulent pipe and channel flows[J].Nasa Sti/recon Technical Report A,1976,75(2):8-16.
[15] KATTANN,THOME J R,FAVRAT D.Flow boiling in horizontal tubes:part 3-development of a new heat transfer model based on flow pattern[J].Journal of Heat Transfer,1998,120(1):156-165.
[16] 李维特,黄保海.汽轮机变工况热力计算[M].北京:中国电力出版社,2001.LI Wei-te,HUANG Bao-hai.thermodynamic calculation of steam turbine under variable conditions[M].Beijing:China Electric Power Press,2001.
[17] 赵士杭,叶海文.压气机静叶可调对燃气轮机和联合循环变工况性能的影响[J].热能动力工程,1990(6):1-4.ZHAO Shi-hang,YE Hai-wen.The effect of variable compressor vanes on gas turbine and combined cycle power plant off-design performance[J].Journal of Engineering for Thermal Energy and Power,1990(6),1-4.
[18] 焦树建.论余热锅炉型联合循环中双压再热式余热锅炉的特性与汽轮机特性的优化匹配问题[J].燃气轮机技术,2001,14(2):14-23.JIAO Shu-jian.discussion on optimization matching between steam turbine characteristics and dual pressure reheat recovery steam generator characteristics in combined cycle gas turbine[J].Gas Turbine Technology,2001,14(2):14-23.
[19] 王艳军.初终参数变化对能耗影响的定量分析方法研究[D].河北:华北电力大学,2008.WANG Yan-jun.Method of quantitative analysis study of effect on energy cost of initial and final parameters[D].Hebei:North China Electric Power University,2008.