Optimizing operation of a solar-aided coal-fired power system based on the solar contribution evaluation method

A solar-aided coal-fired power system (SACFPS) model with five load conditions (100%, 85%, 75%, 50%, and 40%) was built based on thermodynamic and thermoeconomic theories. SACFPS is a combination of a parabolic trough solar power system and a 660MW coal-fired generation plant. The solar contribution evaluation method was introduced into the model to calculate the generation share of the solar power system. Results show that solar contribution decreases after an initial increase as effective solar normal irradiation increases. Optimization strategies, adjusting heat transfer fluid flow rate, have been proposed to maintain solar contribution at a high level. Thus, SACFPS with five load conditions has been optimized. This study also establishes a generation revenue function to evaluate the economics of SACFPS. Income generation of SACFPS after optimization is significantly higher than that without optimization.

[1]  Hongguang Jin,et al.  Off-design thermodynamic performances on typical days of a 330MW solar aided coal-fired power plant in China , 2014 .

[2]  Hongguang Jin,et al.  Evaluation criteria for enhanced solar–coal hybrid power plant performance , 2014 .

[3]  A. Patnode Simulation and Performance Evaluation of Parabolic Trough Solar Power Plants , 2006 .

[4]  Ulf Herrmann,et al.  Optimization Studies for Integrated Solar Combined Cycle Systems , 2001 .

[5]  Graham J. Nathan,et al.  Economic evaluation of a novel fuel-saver hybrid combining a solar receiver with a combustor for a solar power tower , 2014 .

[6]  G. C. Bakos,et al.  Technoeconomic assessment of an integrated solar combined cycle power plant in Greece using line-focus parabolic trough collectors , 2013 .

[7]  Yongping Yang,et al.  An efficient way to use medium-or-low temperature solar heat for power generation – integration into conventional power plant , 2011 .

[8]  K. S. Reddy,et al.  4-E (Energy, Exergy, Environment, and Economic) analysis of solar thermal aided coal-fired power plants , 2010 .

[9]  Guo Xi-yan Coupling Mechanism of Solar Supported Coal-fired Electric Generation System , 2008 .

[10]  Yang Yongping,et al.  Performance evaluation of solar aided feedwater heating of coal-fired power generation (SAFHCPG) system under different operating conditions , 2013 .

[11]  Yong Zhu,et al.  The Evaluation of Solar Contribution in Solar Aided Coal-Fired Power Plant , 2013 .

[12]  Robert Pitz-Paal,et al.  Trough integration into power plants : a study on the performance and economy of integrated solar combined cycle systems , 2004 .

[13]  Yongping Yang,et al.  Optimization study of integration strategies in solar aided coal-fired power generation system , 2014 .

[14]  Yongping Yang,et al.  Solar thermal aided power generation , 2010 .

[15]  Rangan Banerjee,et al.  An analysis of costs of parabolic trough technology in India , 2012 .

[16]  Yongping Yang,et al.  Thermodynamic analysis of a novel integrated solar combined cycle , 2014 .