1. Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China 2. Guodian Science and Technology Research Institute, Nanjing 210023, China
A novel adjusting method for improving gas turbine (GT) efficiency and surge margin (SM) under part-load conditions is proposed. This method adopts the inlet air heating technology, which uses the waste heat of low-grade heat source and the inlet guide vane (IGV) opening adjustment. Moreover, the regulation rules of the compressor inlet air temperature and the IGV opening are studied comprehensively to optimize GT performance. A model and calculation method for an equilibrium running line is adopted based on the characteristic curves of the compressor and turbine. The equilibrium running lines calculated through the calculation method involve three part-load conditions and three IGV openings with different inlet air temperatures. The results show that there is an optimal matching relationship between IGV opening and inlet air temperature. For the best GT performance of a given load, the IGV could be adjusted according to inlet air temperature. In addition, inlet air heating has a considerable potential for the improvement of part-load performance of GT due to the increase in compressor efficiency, combustion efficiency, and turbine efficiency as well as turbine inlet temperature, when inlet air temperature is lower than the optimal value with different IGV openings. Further, when the IGV is in a full opening state and an optimal inlet air temperature is achieved by using the inlet air heating technology, GT efficiency and SM can be obviously higher than other IGV openings. The IGV can be left unadjusted, even when the load is as low as 50%. These findings indicate that inlet air heating has a great potential to replace the IGV to regulate load because GT efficiency and SM can be remarkably improved, which is different from the traditional viewpoints.
. [J]. Frontiers in Energy, 2022, 16(6): 1000-1016.
Wei ZHU, Xiaodong REN, Xuesong LI, Chunwei GU, Zhitan LIU, Zhiyuan YAN, Hongfei ZHU, Tao ZHANG. Improvement of part-load performance of gas turbine by adjusting compressor inlet air temperature and IGV opening. Front. Energy, 2022, 16(6): 1000-1016.
F Haglind. Variable geometry gas turbines for improving the part-load performance of marine combined cycles–gas turbine performance. Energy, 2010, 35(2): 562–570 https://doi.org/10.1016/j.energy.2009.10.026
2
F Haglind. Variable geometry gas turbines for improving the part-load performance of marine combined cycles–combined cycle performance. Applied Thermal Engineering, 2011, 31(4): 467–476 https://doi.org/10.1016/j.applthermaleng.2010.09.029
3
F He, Z Li, P Liu, et al.. Operation window and part-load performance study of a syngas fired gas turbine. Applied Energy, 2012, 89(1): 133–141 https://doi.org/10.1016/j.apenergy.2010.11.044
4
T S Kim. Comparative analysis on the part load performance of combined cycle plants considering design performance and power control strategy. Energy, 2004, 29(1): 71–85 https://doi.org/10.1016/S0360-5442(03)00157-9
5
J H Kim, T S Kim, J L Sohn, et al.Comparative analysis of off-design performance characteristics of single and two-shaft industrial gas turbines. Journal of Engineering for Gas Turbines and Power, 2003, 125(4): 954–960 https://doi.org/10.1115/1.1615252
6
T S Kim, T S Ro. The effect of gas turbine coolant modulation on the part load performance of combined cycle plants part 1: gas turbines. Proceedings of the Institution of Mechanical Engineers. Part A, Journal of Power and Energy, 1997, 211(6): 443–451 https://doi.org/10.1243/0957650981537339
7
T S Kim, T S Ro. The effect of gas turbine coolant modulation on the part load performance of combined cycle plants part 2: combined cycle plant. Proceedings of the Institution of Mechanical Engineers. Part A, Journal of Power and Energy, 1997, 211(6): 453–459 https://doi.org/10.1243/0957650981537348
8
C Bringhenti, J R Barbosa. Part-load versus downrated industrial gas turbine performance. In: Proceedings of ASME Turbo Expo, 2004, 7: 633–639
9
C Bringhenti, J R Barbosa. Study of an industrial gas turbine with turbine stators variable geometry. In: Proceedings of 9th Brazilian Congress of Thermal Engineering and Sciences, Caxambu-MG, Brazil
10
C Bringhenti, J R Barbosa. Effects of variable-area turbine nozzle over the important parameters of gas turbine performance. In: Proceedings of II National Congress of Mechanical Engineering, Joao Pessoa PB, Brazil, 2002
11
F Basrawi, T Yamada, K Nakanishi, et al.. Effect of ambient temperature on the performance of micro gas turbine with cogeneration system in cold region. Applied Thermal Engineering, 2011, 31(6-7): 1058–1067 https://doi.org/10.1016/j.applthermaleng.2010.10.033
12
J H Lee, T S Kim, E Kim. Prediction of power generation capacity of a gas turbine combined cycle cogeneration plant. Energy, 2017, 124: 187–197 https://doi.org/10.1016/j.energy.2017.02.032
E Kakaras, A Doukelis, A Prelipceanu, et al.. Inlet air cooling methods for gas turbine based power plants. Journal of Engineering for Gas Turbines and Power, 2006, 128(2): 312–317 https://doi.org/10.1115/1.2131888
15
M Farzaneh-Gord, M Deymi-Dashtebayaz. Effect of various inlet air cooling methods on gas turbine performance. Energy, 2011, 36(2): 1196–1205 https://doi.org/10.1016/j.energy.2010.11.027
16
A K Mohapatra, Sanjay. Thermodynamic assessment of impact of inlet air cooling techniques on gas turbine and combined cycle performance. Energy, 2014, 68: 191–203 https://doi.org/10.1016/j.energy.2014.02.066
17
N P Poccia. Inlet bleed heater for heating inlet air to a compressor and methods of fabricating and transporting the heater. US Patent, 6685425, 2004
18
M Variny, O Mierka. Improvement of part load efficiency of a combined cycle power plant provisioning ancillary services. Applied Energy, 2009, 86(6): 888–894 https://doi.org/10.1016/j.apenergy.2008.11.004
19
Y P Yang, Z W Bai, G Q Zhang, et al.. Design/off-design performance simulation and discussion for the gas turbine combined cycle with inlet air heating. Energy, 2019, 178: 386–399 https://doi.org/10.1016/j.energy.2019.04.136
20
Z T Liu, X D Ren, Z Y Yan, et al.. Effect of inlet air heating on gas turbine efficiency under partial load. Energies, 2019, 12(17): 3327 https://doi.org/10.3390/en12173327
21
K Abudu, U Igie, O, Minervinoet al.. Gas turbine minimum environmental load extension with compressed air extraction for storage. Applied Thermal Engineering, 2020, 180: 115869 https://doi.org/10.1016/j.applthermaleng.2020.115869
22
F Ron. Component matching analysis for a power generation gas turbine: classroom application. In: Proceedings of ASME Turbo Expo, 2002, GT-2002–30155
23
M Plis, H Rusinowski. Predictive, adaptive model of PG 9171E gas turbine unit including control algorithms. Energy, 2017, 126: 247–255 https://doi.org/10.1016/j.energy.2017.03.027
24
Q Z AI-Handan, M S Y Ebaid. Modeling and simulation of a gas turbine engine for power generation. Journal of Engineering for Gas Turbines and Power, 2006, 128(2): 302–311 https://doi.org/10.1115/1.2061287
25
E Pontus, G Magnus, J Klas. Off-design performance investigation of a low calorific gas fired two-shaft gas turbine. In: Proceedings of ASME Turbo Expo, 2009, GT2009–59067
26
E Pontus, J Klas, K Jens. Re-sizing of a natural gas fired two-shaft gas turbine for low calorific gas operation. In: Proceedings of ASME Turbo Expo, 2009, GT2009–60386
27
C Gu, H Wang, X Ji, et al.. Development and application of a thermodynamic cycle performance analysis method of a three-shaft gas turbine. Energy, 2016, 112: 307–321 https://doi.org/10.1016/j.energy.2016.06.094
28
H Wang, X Li, X Ren, et al.. A thermodynamic-cycle performance analysis method and application on a three-shaft gas turbine. Applied Thermal Engineering, 2017, 127: 465–472 https://doi.org/10.1016/j.applthermaleng.2017.08.061
29
S Farokhi. Aircraft propulsion. 2nd ed. London: John Wiley & Sons, Ltd.,2014
30
Gate cycle. Version 5.51, software GE-energy services, 2005
31
A H Lefebvre. Theoretical aspects of gas turbine combustion performance. College of Aeronautics Note Aero 163, Cranfield Institute of Technology, Bedford, England, 1966
32
A H Lefebvre, G A Halls. Some experiences in combustion scaling. AGARD Advanced Aero-Engine Testing, AGARDograph 37, Pergamon, New York, 1959
33
J D Herbert.Theoretical analysis of reaction rate controlled systems–Part I. In: AGARD Combustion Research and Reviews, 1957
34
R E Henderson, W S Blazowski. Turboporpulsion combustion technology. In: Gordon C O, ed. Aircraft Propulsion Systems Technology and Design. Washington D C: AIAA Inc, 1989
35
J E Hartsel. Prediction of effects of mass-transfer cooling on the blade-row efficiency of turbine airfoils. In:10th Aerospace Sciences Meeting, USA, 1972
36
J H Horlock, D T Watson, T V Jones. Limitations on gas turbine performance imposed by large turbine cooling Flows. Journal of Engineering for Gas Turbines and Power, 2001, 123(3): 487–494 https://doi.org/10.1115/1.1373398
37
M Jonsson, O Bolland, D Bucker. Gas turbine cooling model for evaluation of novel cycles. In: Proceedings of ECOS, 2005
