A Comparative Study of the Techno-Economic Performance of the Linear Fresnel Reflector Using Direct and Indirect Steam Generation: A Case Study under High Direct Normal Irradiance

Authors: Ahmed Aljudaya, Derek Ingham, Lin Ma, Kevin Hughes, Mohammed Pourkashanian

Abstract:

Researchers, power companies, and state politicians have given concentrated solar power (CSP) much attention due to its capacity to generate large amounts of electricity whereas overcoming the intermittent nature of solar resources. The Linear Fresnel Reflector (LFR) is a well-known CSP technology type for being inexpensive, having a low land use factor, and suffering from low optical efficiency. The LFR was considered a cost-effective alternative option to the Parabolic Trough Collector (PTC) because of its simplistic design, and this often outweighs its lower efficiency. The LFR power plants commercially generate steam directly and indirectly in order to produce electricity with high technical efficiency and lower its costs. The purpose of this important analysis is to compare the annual performance of the Direct Steam Generation (DSG) and Indirect Steam Generation (ISG) of LFR power plants using molten salt and other different Heat Transfer Fluids (HTF) to investigate their technical and economic effects. A 50 MWe solar-only system is examined as a case study for both steam production methods in extreme weather conditions. In addition, a parametric analysis is carried out to determine the optimal solar field size that provides the lowest Levelized Cost of Electricity (LCOE) while achieving the highest technical performance. As a result of optimizing the optimum solar field size, the solar multiple (SM) is found to be between 1.2 – 1.5 in order to achieve as low as 9 Cent/KWh for the DSG of the LFR. In addition, the power plant is capable of producing around 141 GWh annually and up to 36% of the capacity factor, whereas the ISG produces less energy at a higher cost. The optimization results show that the DSG’s performance overcomes the ISG in producing around 3% more annual energy, 2% lower LCOE, and 28% less capital cost.

Keywords: Concentrated Solar Power, Levelized cost of electricity, Linear Fresnel reflectors, Steam generation.

References:

[1] D. Gielen, F. Boshell, D. Saygin, M. D. Bazilian, N. Wagner, and R. Gorini, “The role of renewable energy in the global energy transformation,” Energy Strateg. Rev., vol. 24, no. January, pp. 38–50, 2019.
[2] P. Viebahn, Y. Lechon, and F. Trieb, “The potential role of concentrated solar power (CSP) in Africa and Europe-A dynamic assessment of technology development, cost development and life cycle inventories until 2050,” Energy Policy, vol. 39, no. 8, pp. 4420–4430, 2011.
[3] N. B. Desai and S. Bandyopadhyay, “Line-focusing concentrating solar collector-based power plants: a review,” Clean Technol. Environ. Policy, vol. 19, no. 1, pp. 9–35, 2017.
[4] L. Coco Enriquez, J. Muñoz Antón, and J. M. Martínez-Val Peñalosa, “SolarPaces 2013: Innovations on direct steam generation in linear fresnel collectors,” SolarPACES 2013 | SolarPACES 2013 | 17/09/201 - 20/09/2013 | Las Vegas, EE.UU, 2013.
[5] H. H. Sait, J. M. Martinez-Val, R. Abbas, and J. Munoz-Anton, “Fresnel-based modular solar fields for performance/cost optimization in solar thermal power plants: A comparison with parabolic trough collectors,” Appl. Energy, vol. 141, pp. 175–189, 2015.
[6] E. Bellos, C. Tzivanidis, and A. Papadopoulos, “Optical and thermal analysis of a linear Fresnel reflector operating with thermal oil, molten salt and liquid sodium,” Appl. Therm. Eng., vol. 133, no. March, pp. 70–80, 2018.
[7] A. Roostaee and M. Ameri, “Effect of Linear Fresnel Concentrators field key parameters on reflectors configuration, Trapezoidal Cavity Receiver dimension, and heat loss,” Renew. Energy, vol. 134, pp. 1447–1464, 2019.
[8] A. Kassem, K. Al-Haddad, and D. Komljenovic, “Concentrated solar thermal power in Saudi Arabia: Definition and simulation of alternative scenarios,” Renew. Sustain. Energy Rev., vol. 80, no. May, pp. 75–91, 2017.
[9] M. J. Wagner, “WREF 2012: Results and comparison from the SAM linear fresnel technology performance model,” World Renew. Energy Forum, WREF 2012, Incl. World Renew. Energy Congr. XII Color. Renew. Energy Soc. Annu. Conf., vol. 4, no. April, pp. 2666–2673, 2012.
[10] C. Marugán-Cruz, D. Serrano, J. Gómez-Hernández, and S. Sánchez-Delgado, “Solar multiple optimization of a DSG linear Fresnel power plant,” Energy Convers. Manag., svol. 184, no. February, pp. 571–580, 2019.
[11] Y. Xu, J. Pei, J. Yuan, and G. Zhao, “Concentrated solar power: technology, economy analysis, and policy implications in China,” Environ. Sci. Pollut. Res., vol. 29, no. 1, pp. 1324–1337, 2022.