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| 1 | Off-Design Performance of 9F Gas Turbine Based on gPROMs and BP Neural Network Model显示文摘Gas turbines are increasingly and widely used,whose research and production reflect a country’s industrial capacity and level.Due to the changeable working environment,gas turbines usually work under the condition of simultaneous changes of ambient temperature,load and fuel.However,the current researches mainly focus on the change in single condition,and do not fully consider the simultaneous change in different conditions.On the basis of single condition,this paper further studies the dual off-design performance of gas turbines under three conditions:temperature-load,fuel-load and fuel-temperature.Firstly,the whole machine model of a gas turbine is established,in which the compressor model has the greatest impact on the performance of gas turbines.Therefore,this paper obtains a more accurate compressor model by combining the engineering modeling advantages of gPROMs and the powerful mathematical calculation ability of MATLAB neural network.Then,according to the established gas turbine model,the dual off-design performance is studied,which is mainly based on the parameter of output and efficiency.The result shows that the efficiency and power output of gas turbines will decrease with the increase of ambient temperature.With the decrease of fuel calorific value,power output and efficiency will increase.As the load decreases,the efficiency of the gas turbines will decrease,and these changes are consistent with the single off-design performance.However,when the fuel and temperature change simultaneously,only adjusting the IGV angle cannot avoid the surge when the temperature is above 30°C.At this time,it is necessary to adjust the extraction rate in order to ensure the safe and stable operation of gas turbines.Therefore,the research on dual off-design performance of gas turbines has an important significance for the peak shaving operation of gas turbines. | HAO Xuedi SUN Lei CHI Jinling ZHANG Shijie | 2022 | Journal of Thermal Science2022，31，1： | 2 |
| 2 | Off-design performance of a chemical looping combustion (CLC) combined cycle:effects of ambient temperature显示文摘The present work investigates the influence of ambient temperature on the steady-state off-design thermodynamic performance of a chemical looping combustion(CLC) combined cycle.A sensitivity analysis of the CLC reactor system was conducted,which shows that the parameters that influence the temperatures of the CLC reactors most are the flow rate and temperature of air entering the air reactor.For the ambient temperature variation,three off-design control strategies have been assumed and compared:1) without any Inlet Guide Vane(IGV) control,2) IGV control to maintain air reactor temperature and 3) IGV control to maintain constant fuel reactor temperature,aside from fuel flow rate adjusting.Results indicate that,compared with the conventional combined cycle,due to the requirement of pressure balance at outlet of the two CLC reactors,CLC combined cycle shows completely different off-design thermodynamic characteristics regardless of the control strategy adopted.For the first control strategy,temperatures of the two CLC reactors both rise obviously as ambient temperature increases.IGV control adopted by the second and the third strategy has the effect to maintain one of the two reactors' temperatures at design condition when ambient temperature is above design point.Compare with the second strategy,the third would induce more severe decrease of efficiency and output power of the CLC combined cycle. | Jinling Chi Bo Wang Shijie Zhang Yunhan Xiao | 2010 | Journal of Thermal Science2010，19，1： | 2 |
| 3 | Thermodynamic Performance Assessment of IGCC Power Plants with Various Syngas Cleanup Processes显示文摘现在的工作探索多少 IGCC 能与常规冷煤气的大扫除(CGCU ) 比较得益于温暖的煤气的大扫除(WGCU ) 并且什么在一个植物宽的观点是干燥微粒移动和温暖的煤气的 desulfurization (WGD ) 的各自的贡献。IGCC 的热力学的性能上的 WGD 的关键参数的影响种包括 desulfurization 温度,在新生流的氧集中,和 H2S 移动效率被讨论。有完整的 WGCU 的 IGCC 的网效率与完整的 CGCU 与 IGCC 相比经历 1.77 个百分比点的改进,这被获得。哪个,没有水 scrubber 的干燥微粒移动贡献大约 1 个百分比点。当它比大约 350 潩 ? 硯摩瑡潩 ? 敲楳瑳湡散椠 ? 敷歡牥高时,有 WGD 的 IGCC 的热力学的性能上的 desulfurization | Yunhan Xiao | 2012 | Journal of Thermal Science2012，21，5： | 2 |
| 4 | Thermodynamic Performance Analysis of E/F/H-Class Gas Turbine Combined Cycle with Exhaust Gas Recirculation and Inlet/Variable Guide Vane Adjustment under Part-Load Conditions显示文摘Exhaust gas recirculation control(EGRC),an inlet air heating technology,can be utilized in combination with inlet/variable guide vane control(IGV/VGVC) and fuel flow control(FFC) to regulate the load,thereby effectively improving the part-load(i.e.,off-design) performance of the gas turbine combined cycle(GTCC).In this study,the E-,F-,and H-Class EGR-GTCC design and off-design system models were established and validated to perform a comparative analysis of the part-load performance under the EGR-IGV-FFC and conventional IGV-FFC strategies in the E/F/H-Class GTCC.Results show that EGR-IGV-FFC has considerable potential for the part-load performance enhancement and can show a higher combined cycle efficiency than IGV-FFC in the E-,F-,and H-Class GTCCs.However,the part-load performance improvement in the corresponding GTCC was weakened for the higher class of the gas turbine because of the narrower load range of EGR action and the deterioration of the gas turbine performance.Furthermore,EGR-IGV-FFC was inferior to IGV-FFC in improving the performance at loads below 50% for the H-Class GTCC.The results obtained in this paper could help guide the application of EGR-IGV-FFC to enhance the part-load performance of various classes of GTCC systems. | LI Keying CHI Jinling WANG Bo ZHANG Shijie | 2024 | Journal of Thermal Science2024，33，1： | 0 |
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