This paper briefs the configuration and performance of large size gas turbines and their composed combined cycle power plants designed and produced by four large renown gas turbine manufacturing firms in the world, pr...This paper briefs the configuration and performance of large size gas turbines and their composed combined cycle power plants designed and produced by four large renown gas turbine manufacturing firms in the world, providing reference for the relevant sectors and enterprises in importing advanced gas turbines and technologies.展开更多
This paper presents the improved design of a 25 MW gas turbine power plant at Omoku in the Niger Delta area of Nigeria, using combined cycle application. It entails retrofitting a steam bottoming plant to the existing...This paper presents the improved design of a 25 MW gas turbine power plant at Omoku in the Niger Delta area of Nigeria, using combined cycle application. It entails retrofitting a steam bottoming plant to the existing 25 MW gas turbine plant by incorporating a heat recovery steam generator. The focus is to improve performance as well as reduction in total emission to the environment. Direct data collection was performed from the HMI monitoring screen, log books and manufacturer’s manual. Employing the application of MATLAB, the thermodynamics equations were modeled and appropriate parameters of the various components of the steam turbine power plant were determined. The results show that the combined cycle system had a total power output of 37.9 MW, made up of 25.0 MW from the gas turbine power plant and 12.9 MW (an increase of about 51%) from the steam turbine plant, having an HRSG, condenser and feed pump capacities of 42.46 MW, 29.61 MW and 1.76 MW respectively. The condenser cooling water parameters include a mass flow of 1180.42 kg/s, inlet and outlet temperatures of 29.8°C and 35.8°C respectively. The cycle efficiency of the dry mode gas turbine was 26.6% whereas, after modification, the combined cycle power plant overall efficiency is 48.8% (about 84% increases). Hence, SIEMENS steam turbine product of MODEL: SST-150 was recommended as the steam bottoming plant. Also the work reveals that a heat flow of about 42.46 MW which was otherwise being wasted in the exhaust gas of the 25 MW gas turbine power plant could be converted to 12.9 MW of electric power, thus reducing the total emission to the environment.展开更多
在“碳达峰、碳中和”背景下,燃气–蒸汽联合循环机组(combined-cycle gas turbine,CCGT)因其快速启动及深度调峰等优良特性,可为消纳大规模可再生能源提供灵活性资源,得到了广泛关注。首先,该文针对现有关于CCGT的6种建模方式,讨论其...在“碳达峰、碳中和”背景下,燃气–蒸汽联合循环机组(combined-cycle gas turbine,CCGT)因其快速启动及深度调峰等优良特性,可为消纳大规模可再生能源提供灵活性资源,得到了广泛关注。首先,该文针对现有关于CCGT的6种建模方式,讨论其建模的精确性、计算效率以及解的可行性。其次,总结其中4种考虑机组内部轮机实际物理特性的模型,并比较他们的特点及适用范围。最后,考虑将蒸汽配合特性引入模型以及精细化启停过程、变量类型、收紧约束、结构变化对模型求解的影响。研究结果能够为推动适用于大规模机组组合的CCGT建模研究和应用提供一定参考。展开更多
文摘This paper briefs the configuration and performance of large size gas turbines and their composed combined cycle power plants designed and produced by four large renown gas turbine manufacturing firms in the world, providing reference for the relevant sectors and enterprises in importing advanced gas turbines and technologies.
文摘This paper presents the improved design of a 25 MW gas turbine power plant at Omoku in the Niger Delta area of Nigeria, using combined cycle application. It entails retrofitting a steam bottoming plant to the existing 25 MW gas turbine plant by incorporating a heat recovery steam generator. The focus is to improve performance as well as reduction in total emission to the environment. Direct data collection was performed from the HMI monitoring screen, log books and manufacturer’s manual. Employing the application of MATLAB, the thermodynamics equations were modeled and appropriate parameters of the various components of the steam turbine power plant were determined. The results show that the combined cycle system had a total power output of 37.9 MW, made up of 25.0 MW from the gas turbine power plant and 12.9 MW (an increase of about 51%) from the steam turbine plant, having an HRSG, condenser and feed pump capacities of 42.46 MW, 29.61 MW and 1.76 MW respectively. The condenser cooling water parameters include a mass flow of 1180.42 kg/s, inlet and outlet temperatures of 29.8°C and 35.8°C respectively. The cycle efficiency of the dry mode gas turbine was 26.6% whereas, after modification, the combined cycle power plant overall efficiency is 48.8% (about 84% increases). Hence, SIEMENS steam turbine product of MODEL: SST-150 was recommended as the steam bottoming plant. Also the work reveals that a heat flow of about 42.46 MW which was otherwise being wasted in the exhaust gas of the 25 MW gas turbine power plant could be converted to 12.9 MW of electric power, thus reducing the total emission to the environment.
文摘在“碳达峰、碳中和”背景下,燃气–蒸汽联合循环机组(combined-cycle gas turbine,CCGT)因其快速启动及深度调峰等优良特性,可为消纳大规模可再生能源提供灵活性资源,得到了广泛关注。首先,该文针对现有关于CCGT的6种建模方式,讨论其建模的精确性、计算效率以及解的可行性。其次,总结其中4种考虑机组内部轮机实际物理特性的模型,并比较他们的特点及适用范围。最后,考虑将蒸汽配合特性引入模型以及精细化启停过程、变量类型、收紧约束、结构变化对模型求解的影响。研究结果能够为推动适用于大规模机组组合的CCGT建模研究和应用提供一定参考。
