| 271 | 1 | 65 |
| 下载次数 | 被引频次 | 阅读次数 |
由于热电联产机组供热蒸汽参数的不匹配和机组调峰能力的不足，导致了抽汽能量的浪费和较低的可再生能源利用率。为此，在能源系统变革与新能源体系建设的背景下，以提高热电联产机组能效水平，增加运行灵活性为目的构建了基于螺杆膨胀机的太阳能辅助热电联产系统。以某600 MW机组为例，利用Ebsilon软件建立热力学模型，对不同运行模式下互补系统的调峰能力、典型日运行特性以及结合碳交易的经济收益进行分析。结果表明，互补系统在两种运行模式下，均能有效拓展热电特性区域和提高系统调峰能力，调峰能力比原机组最大可增加19.94%,夜间风电消纳能力提升46.3 MW;采暖季典型日内，螺杆膨胀机发电量293.36 MW,互补系统节省标准煤耗量64.17 t(1.66%);非采暖季典型日内，系统太阳能累计发电量144.41 MW,平均光电效率可达18.08%。互补系统每年可减少43 713.27 t的碳排放量，节省了349.71万元的碳交易成本。
Abstract：Due to the mismatch in heating steam parameters and the insufficient peak-shaving capacity of cogeneration units, extracted steam energy is wasted and the utilization rate of renewable energy remains low. In the context of energy system transformation and the development of new energy systems, a solar-assisted cogeneration system based on a screw expander(SE) has been established to enhance the energy efficiency and operational flexibility of the units. Taking a 600 MW unit as an example, the thermodynamic model is constructed using Ebsilon software to analyze the peak shaving capacity, typical daily operational characteristics and economic benefits incorporating carbon trading under different operation modes. The results show that the hybrid system effectively expands the thermoelectric operating range and enhances peak-shaving capacity under both operating modes. The maximum increase in peak-shaving capacity reaches 19.94% compared to the original unit, and the wind power consumption capacity at night is increased by 46.3 MW. On a typical heating season day, the power generation of SE is 293.36 MW, and it saves 64.17 t(1.66%) of standard coal consumption. On a typical non-heating season day, the cumulative solar power generation reaches 144.41 MW, with an average photovoltaic efficiency of 18.08%. The cogeneration system can reduce 43 713.27 tons of carbon emissions per year, saving 3.497 1 million yuan of carbon transaction costs.
[1] 国家能源局.能源碳达峰碳中和标准化提升行动计划[EB/OL].[2022-10-09].https://www.nea.gov.cn/2022-10/09/c_1310668927.htm.National Energy Administration.Promotion action plan of energy carbon peak and carbon neutralization standardization[EB/OL].[2022-10-09].https://www.nea.gov.cn/2022-10/09/c_1310668927.htm (in Chinese).
[2] 莫子渊，顾煜炯，陆树银，等.600MW超临界供热机组能量梯级利用及对比分析[J].电力科学与工程，2021,37(4):55-62.MO Ziyuan,GU Yujiong,LU Shuyin,et al.Energy cascade utilization and comparative analysis of 600 MW supercritical heating unit[J].Electric Power Science and Engineering,2021,37(4):55-62 (in Chinese).
[3] 陆树银，刘浩晨，顾煜炯，等.大型热电联产机组供热改造分析[J].工程热物理学报，2022,43(5):1182-1189.LU Shuyin,LIU Haochen,GU Yujiong,et al.Thermo-dynamic analysis of heating reformation of large-scale CHP[J].Journal of Engineering Thermophysics,2022,43(5):1182-1189 (in Chinese).
[4] YAN Zhe,ZHANG Yongming,LIANG Runqi,et al.An allocative method of hybrid electrical and thermal energy storage capacity for load shifting based on seasonal difference in district energy planning[J].Energy,2020,207:118139.
[5] 薛凯，王义函，陈衡，等.槽式太阳能辅助生物质热电联产系统热力学性能分析[J].发电技术，2021,42(6):653-664.XUE Kai,WANG Yihan,CHEN Heng,et al.Thermo-dynamic performance analysis of a parabolic trough solar-assisted biomass-fired cogeneration system[J].Power Generation Technology,2021,42(6):653-664 (in Chinese).
[6] 王子杰，顾煜炯，刘浩晨，等.热电联产机组热电解耦技术对比分析[J].化工进展，2022,41(7):3564-3572.WANG Zijie,GU Yujiong,LIU Haochen,et al.Comparison and analysis of heat-power decoupling technologies for CHP units[J].Chemical Industry and Engineering Progress,2022,41(7):3564-3572 (in Chinese).
[7] 李斌，李岩，张玉斌，等.塔式太阳能辅助燃煤发电系统设计与运行特性仿真研究[J].中国电机工程学报，2018,38(6):1729-1737.LI Bin,LI Yan,ZHANG Yubin,et al.Simulation research on operating behavior of solar tower power aided coal-fired power generation system[J].Proceedings of the CSEE,2018,38(6):1729-1737 (in Chinese).
[8] DING Zeyu,HOU Hongjuan,DUAN Liqiang,et al.Performance analysis and capacity optimization of a solar aided coal-fired combined heat and power system[J].Energy,2022,239:122141.
[9] KOLB G.Economic evaluation of solar-only and hybrid power towers using molten-salt technology[J].Solar Energy,1998,62(1):51-61.
[10] CHEN Heng,XU Jidong,XIAO Yao,et al.An improved heating system with waste pressure utilization in a combined heat and power unit[J].Energies,2018,11(6):1515.
[11] WANG Jianxing,DUAN Liqiang,YANG Yongping,et al.Study on the general system integration optimization method of the solar aided coal-fired power generation system[J].Energy,2019,169:660-673.
[12] POPOV D.An option for solar thermal repowering of fossil fuel fired power plants[J].Solar Energy,2011,85(2):344-349.
[13] 侯宏娟，梁明宇，黄畅.两种典型集成方式下太阳能辅助燃煤机组发电系统热性能对比分析[J].太阳能学报，2018,39(4):925-932.HOU Hongjuan,LIANG Mingyu,HUANG Chang.Comparative analysis of thermal performance of solar-assisted coal-fired power generation system under two typical integration methods[J].Acta Energiae Solaris Sinica,2018,39(4):925-932 (in Chinese).
[14] 侯宏娟，王学伟，宋红，等.太阳能辅助330MW燃煤机组互补发电系统动态特性及年性能分析[J].太阳能学报，2018,39(12):3331-3338.HOU Hongjuan,WANG Xuewei,SONG Hong,et al.Dynamic characteristics and annual performance analy-sis of a solar-assisted 330MW coal-fired power unit complementary generation system[J].Acta Energiae Solaris Sinica,2018,39(12):3331-3338 (in Chinese).
[15] 王立功，许继东，徐钢，等.热电联产机组供热抽汽余压利用节能机理[J].热力发电，2019,48(5):8-13.WANG Ligong,XU Jidong,XU Gang,et al.Energy saving mechanism of waste pressure utilization of extraction steam for heating in combined heat and power cogeneration units[J].Thermal Power Generation,2019,48(5):8-13 (in Chinese).
[16] 和学豪，赵梓良，郑磊，等.变工况下热泵供热及膨胀机供热的热力性能对比分析[J].太阳能学报，2023,44(2):334-343.HE Xuehao,ZHAO Ziliang,ZHENG Lei,et al.Thermo-dynamic performance comparison analysis of heat pump heating and expander heating under variable conditions[J].Acta Energiae Solaris Sinica,2023,44(2):334-343 (in Chinese).
[17] HE Xuehao,YU Zhiwen,GU Yujiong,et al.Modeling and off-design performance analysis of a screw expander-based steam pressure energy recovery system in a combined heat and power unit[J].ACS Omega,2021,6(51):35442-35456.
[18] IODICE P,LANGELLA G,AMORESANO A.Modeling and energetic-exergetic evaluation of a novel screw expander-based direct steam generation solar system[J].Applied Thermal Engineering,2019,155:82-95.
[19] 曹丽华，王文龙，罗桓桓，等.深度调峰工况下汽轮机低压缸最小流量的确定[J].机械工程学报，2020,56(16):98-108.CAO Lihua,WANG Wenlong,LUO Huanhuan,et al.Determination of minimum flow rate of low pressure cylinder of steam turbine under deep peak load regulation conditions[J].Journal of Mechanical Engineering,2020,56(16):98-108 (in Chinese).
[20] ZHU Y,JIANG L,JIN V,et al.Impact of built-in and actual expansion ratio difference of expander on ORC system performance[J].Applied Thermal Engineering,2014,71(1):548-558.
[21] READ M,STOSIC N,SMITH I K.Optimization of screw expanders for power recovery from low-grade heat sources[J].Energy Technology & Policy,2014,1(1):131-142.
[22] DUDLEY V,KOLB G,SLOAN M,et al.SEGS LS-2 solar collector[R].Sandia National Laboratories,1994.
[23] 郭喜燕，刘嘉康，白雪，等.基于碳排放特性及碳交易规则的热电联产机组经济性分析[J].热力发电，2023,52(4):14-23.GUO Xiyan,LIU Jiakang,BAI Xue,et al.Economic analysis of cogeneration units based on carbon emission characteristics and carbon trading rules[J].Thermal Power Generation,2023,52(4):14-23 (in Chinese).
基本信息:
中图分类号:TK519;TM621
引用信息:
[1]柴萍涛,顾煜炯,朱萍.基于螺杆膨胀机的太阳能辅助热电联产系统性能分析[J].华北电力大学学报(自然科学版),2026,53(01):138-148.
基金信息:
北京市自然科学基金资助项目(3172031)
2024-04-16
2024-04-16
2024-04-16