Energy and exergy analysis of a closed Brayton cycle-based combined cycle for solar power tower plants

Abstract Concentrating Solar Power (CSP) technology offers an interesting potential for future power generation and research on CSP systems of all types, particularly those with central receiver system (CRS) has been attracting a lot of attention recently. Today, these power plants cannot compete with the conventional power generation systems in terms of Levelized Cost of Electricity (LCOE) and if a competitive LCOE is to be reached, employing an efficient thermodynamic power cycle is deemed essential. In the present work, a novel combined cycle is proposed for power generation from solar power towers. The proposed system consists of a closed Brayton cycle, which uses helium as the working fluid, and two organic Rankine cycles which are employed to recover the waste heat of the Brayton cycle. The system is thermodynamically assessed from both the first and second law viewpoints. A parametric study is conducted to examine the effects of key operating parameters (including solar subsystem and power cycle parameters) on the overall power plant performance. The results indicate that exergy efficiencies of higher than 30% are achieved for the overall power plant. Also, according to the results, the power cycle proposed in this work has a better performance than the other investigated Rankine and supercritical CO 2 systems operating under similar conditions, for these types of solar power plants.

[1]  Fahad A. Al-Sulaiman,et al.  Optimization of heliostat field layout in solar central receiver systems on annual basis using differential evolution algorithm , 2015 .

[2]  Antonio L. Avila-Marin,et al.  Volumetric receivers in Solar Thermal Power Plants with Central Receiver System technology: A review , 2011 .

[3]  Fredrik Haglind,et al.  Thermoeconomic optimization of a Kalina cycle for a central receiver concentrating solar power plant , 2016 .

[4]  Brian D. Iverson,et al.  Supercritical CO2 Brayton cycles for solar-thermal energy , 2013 .

[5]  Mortaza Yari,et al.  Utilization of waste heat from GT-MHR for power generation in organic Rankine cycles. , 2010 .

[6]  Fahad A. Al-Sulaiman,et al.  Performance comparison of different supercritical carbon dioxide Brayton cycles integrated with a solar power tower , 2015 .

[7]  R. P. Merchán,et al.  Seasonal thermodynamic prediction of the performance of a hybrid solar gas-turbine power plant , 2016 .

[8]  Yingxue Yao,et al.  Heliostat field layout methodology in central receiver systems based on efficiency-related distribution , 2015 .

[9]  Ibrahim Dincer,et al.  Design and analysis of a solar tower based integrated system using high temperature electrolyzer for hydrogen production , 2016 .

[10]  Rob Hovsapian,et al.  Dynamic analysis of concentrated solar supercritical CO2-based power generation closed-loop cycle , 2016 .

[11]  Brian D. Iverson,et al.  High-efficiency thermodynamic power cycles for concentrated solar power systems , 2014 .

[12]  Torsten Fransson,et al.  Advanced Hybrid Solar Tower Combined-Cycle Power Plants , 2014 .

[13]  Louy Qoaider,et al.  Techno-economic performance of concentrating solar power plants under the climatic conditions of the southern region of Tunisia , 2016 .

[14]  Germain Augsburger,et al.  Thermoeconomic optimization of a combined-cycle solar tower power plant , 2012 .

[15]  Pierre Neveu,et al.  Integrated design and construction of a micro-central tower power plant , 2016 .

[16]  D. Yogi Goswami,et al.  A computationally efficient method for the design of the heliostat field for solar power tower plant , 2014 .

[17]  V. Zare,et al.  A thermodynamic comparison between organic Rankine and Kalina cycles for waste heat recovery from the Gas Turbine-Modular Helium Reactor , 2015 .

[18]  Abdallah Khellaf,et al.  A review of studies on central receiver solar thermal power plants , 2013 .

[19]  Meihong Wang,et al.  Closed-cycle gas turbine for power generation: A state-of-the-art review , 2016 .

[20]  Maoqing Li,et al.  Construction and preliminary test of a low-temperature regenerative Organic Rankine Cycle (ORC) using R123 , 2013 .

[21]  Ricardo Chacartegui,et al.  Alternative cycles based on carbon dioxide for central receiver solar power plants , 2011 .

[22]  Robert A. Taylor,et al.  Liquid sodium versus Hitec as a heat transfer fluid in solar thermal central receiver systems , 2012 .

[23]  S. Kalogirou.  Solar Energy Engineering: Processes and Systems , 2009 .

[24]  Zhifeng Wang,et al.  Energy and exergy analysis of solar power tower plants , 2011 .

[25]  Fredrik Haglind,et al.  Performance analysis of a Kalina cycle for a central receiver solar thermal power plant with direct steam generation , 2014 .

[26]  Yong Zhu,et al.  Exergy destruction analysis of solar tower aided coal-fired power generation system using exergy and advanced exergetic methods , 2016 .

[27]  Marc A. Rosen,et al.  Exergoeconomic comparison of TLC (trilateral Rankine cycle), ORC (organic Rankine cycle) and Kalina cycle using a low grade heat source , 2015 .