SCIENCE CHINA Technological Sciences, Volume 59 , Issue 2 : 322-329(2016) https://doi.org/10.1007/s11431-015-5956-3

Performance analysis of a solar-aided power generation (SAPG) plant using specific consumption theory

More info
  • ReceivedAug 2, 2015
  • AcceptedOct 20, 2015
  • PublishedJan 27, 2016


In contrast to a traditional coal-fired power generation plant where steam extracted from a turbine is used to preheat the feedwater in all preheating stages, a solar-aided power generation (SAPG) plant uses solar heat to replace a part or all of the extracted steam in one or more preheating stages. The performance of an SAPG plant with different replacements is investigated in this study by using specific consumption theory (SCT). Fuel-specific and cost-specific consumption models for SAPG plants are built based on the SCT. A typical 330 MW coal-fired power plant is used as the study case. The performance of the SAPG plant in terms of specific consumption, with steam obtained from the first through the eighth (except for the fourth) stages of extraction replaced by solar heat, is compared with that of the reference coal-fired power plant. The fuel-specific consumption of the SAPG plant is determined to be lower than that of the reference coal-fired power plant. The fuel-specific consumption accrual distribution in SAPG plants is used to assess the effect of each individual replacement. Effective strategies to reduce the specific costs of the SAPG and coal-fired power plants are proposed based on the results of this study.


This work was supported by the National Basic Research Program of China ("973" Project) (Grant No. 2015CB251505), the National Natural Science Foundation of China (Grant No. 51206049), the National Hi-Tech Research and Development Program of China ("863" Project) (2012AA050604), the 111 Project (Grant No. B12034), and the Fundamental Research Funds for the Central Universities (Grant No. 2014XS29).


[1] Sheu E J, Mitsos A, Eter A A, et al. A review of hybrid solar-fossil fuel power generation systems and performance metrics. ASME J Sol Energy Eng, 2012, 134: 1-17. 041006. Google Scholar

[2] Jamel M S, Abd R A, Shamsuddin A H. Advances in the integration of solar thermal energy with conventional and non-conven- tional power plants. Renew Sust Energy Rev, 2013, 20: 71-81. Google Scholar

[3] Behar O, Khellaf A, Mohammedi K, et al. A review of integrated solar combined cycle system (ISCCS) with a parabolic trough technology. Renew Sust Energy Rev, 2014, 39: 223-250. Google Scholar

[4] Pierce W, Gauché P, Backström T, et al. A comparison of solar aided power generation (SAPG) and stand-alone concentrating solar power (CSP)-A South African case study. Appl Therm Eng, 2013, 61: 657-662. Google Scholar

[5] Bakos G C, Tsechelidou C. Solar aided power generation of a 300 MW lignite fired power plant combined with line-focus parabolic trough collectors field. Renew Energ, 2013, 60: 540-547. Google Scholar

[6] Yang Y P, Cui Y H, Hou H J, et al. Research on solar aided coal- fired power generation system and performance analysis. Sci China Ser E-Tech Sci, 2008, 51: 1211-1221. Google Scholar

[7] Yang Y P, Yan Q, Zhai R R, et al. An efficient way to use medium-or-low temperature solar heat for power generation-integration into conventional power plant. Appl Therm Eng, 2011, 31: 157-162. Google Scholar

[8] Dimityr P. An option for solar thermal repowering of fossil fuel fired power plants. Sol Energy, 2011, 85: 344-349. Google Scholar

[9] Gunasekaran S, Mancini N D, El-Khaja R, et al. Solar-thermal hybridization of advanced zero emissions power cycle. Energy, 2014, 65: 152-165. Google Scholar

[10] Zhao Y W, Hong H, Jin H G. Evaluation criteria for enhanced solar-coal hybrid power plant performance. Appl Therm Eng, 2014, 73: 577-587. Google Scholar

[11] You Y, Hu E J. Thermodynamic advantages of using solar energy in the regenerative Rankine power plant. Appl Therm Eng, 1999, 19: 1173-1180. Google Scholar

[12] You Y, Hu E J. A medium-temperature solar thermal power system and its efficiency optimisation. Appl Therm Eng, 2002, 22: 357-364. Google Scholar

[13] Hu E, Yang Y P, Nishimura A, et al. Solar thermal aided power generation. Appl Energ, 2010, 87: 2881-2885. Google Scholar

[14] Baghernejad A, Yaghoubi M. Exergy analysis of an integrated solar combined cycle system. Renew Energ, 2010, 35: 2157-2164. Google Scholar

[15] Hong H, Zhao Y W, Jin H G. Proposed partial repowering of a coal- fired power plant using low-grade solar thermal energy. Int J Thermody, 2011, 14: 21-28. Google Scholar

[16] Peng S, Wang Z, Hong H, et al. Exergy evaluation of a typical 330 MW solar-hybrid coal-fired power plant in China. Energ Convers Manage, 2014, 85: 848-855. Google Scholar

[17] Montes M J, Rovira A, Muñoz M, et al. Performance analysis of an integrated solar combined cycle using direct steam generation in parabolic trough collectors. Appl Energ, 2011, 88: 3228-3238. Google Scholar

[18] Hou H J, Yu Z Y, Yang Y P, et al. Performance evaluation of solar aided feedwater heating of coal-fired power generation (SAFHCPG) system under different operating conditions. Appl Energ, 2013, 112: 710-718. Google Scholar

[19] Peng S, Hong H, Wang Y, et al. Off-design thermodynamic performances on typical days of a 330 MW solar aided coal-fired power plant in China. Appl Energ, 2014,130: 500-509. Google Scholar

[20] Song Z P. Total energy system analysis of heating. Energy, 2000, 25: 807-822. Google Scholar

[21] Xu G, Yang Y P, Ding J, et al. Analysis and optimization of CO2 capture in an existing coal-fired power plant in China. Energy, 2013, 58: 117-127. Google Scholar

[22] Hou H J, Yang Y P, Hu E, et al. Evaluation of solar aided biomass power generation systems with parabolic trough field. Sci China Tech Sci, 2011, 54: 1455-1461. Google Scholar

[23] Electric Power Planning and Design Institute. Cost Index Reference of Thermal Power Engineering Design (in Chinese). Beijing: China Electric Power Industry Press, 2013. Google Scholar

Copyright 2020 Science China Press Co., Ltd. 《中国科学》杂志社有限责任公司 版权所有

京ICP备17057255号       京公网安备11010102003388号