Evaluation of a Small-Scale CSP Plant Using POLYPHEM Technology, a Solar Tower Driven Combined GT and ORC With TES





Solar Tower Technology, Small-Scale CSP, Thermocline Storage, Micro-Gas Turbine, Organic Rankine Cycle


An innovative small-scale CSP tower plant, developed within the European research project POLYPHEM, was technically and economically evaluated and a benchmarking study was carried out including competing solutions to cover electricity demand of two remote locations with no existing access to national grid. First of all, this study shows that the POLYPHEM technology is able to deliver electricity at the target cost for this project. Regarding the cost of electricity per technology, the LCOE of POLYPHEM was higher than the PV+BESS solution, competitive with grid expansion, and significantly lower than diesel generators. Some additional relevant improvements such as the ability of delivering heat and integration of water desalination system, necessary for such a system to expand its competitiveness, were identified towards developing a roadmap to bring small-scale CSP projects to market within another study. In this study, the benchmarking is solely based on electricity production.


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C. Hall, R. Pratt, D. Farrant, C. Corsi, J. Pye, and J. Coventry, “Cost analysis of a mini-facet heliostat,” in AIP Conference Proceedings 1850: International Conference on Concentrating Solar Power and Chemical Energy Systems, Abu Dhabi, United Arab Emirates, 2017, p. 110005.

A. Ferriere et al., “The POLYPHEM project: An innovative small-scale solar thermal combined cycle,” in AIP Conference Proceedings 2126 (2019), p. 30022.

M. Ferreres, “Modelling and Optimization of Combined Solar-Driven Micro Gas Turbine with ORC and Stratified Thermal Energy Storage,” Master thesis, Hanze University of Applied Sciences, Groningen, Netherlands, 2021.

O. D. T. Odou, R. Bhandari, and R. Adamou, “Hybrid off-grid renewable power system for sustainable rural electrification in Benin,” Renewable Energy, vol. 145, pp. 1266–1279, 2020, doi: https://doi.org/10.1016/j.renene.2019.06.032.

International Renewable Energy Agency (IRENA), “Renewable Power Generation Costs 2020,” 2021.

International Renewable Energy Agency (IRENA), “Electricity storage and renewables: Costs and markets to 2030,” 2017.

R. Kawamoto et al., “Estimation of CO2 Emissions of Internal Combustion Engine Vehicle and Battery Electric Vehicle Using LCA,” Sustainability, vol. 11, no. 9, p. 2690, 2019, doi: https://doi.org/10.3390/su11092690.

TheGlobalEconomy.com, “Diesel Prices - Country Rankings,” 2016, 2016. TheGlobalEconomy.com (accessed: Jan. 1 2022).

B. Mainali and R. Dhital, Isolated and Mini-Grid Solar PV Systems: An Alternative Solution for Providing Electricity Access in Remote Areas (Case Study from Nepal): Solar Energy Storage, 2015.

globalpetrolprices.com, “Electricity Prices,” 2021, 2021.

Christoph Kost, Shivenes Shammugam, Verena Fluri, Dominik Peper, Aschkan Davoodi, and Thomas Schlegl, “Levelized Cost of Electricity: Renewable Energy Technologies (Version 2021),” 2021.




How to Cite

Rohani, S., Chandler, N., Schöttl, P., Ferreres Eceiza, M., & Fluri, T. (2024). Evaluation of a Small-Scale CSP Plant Using POLYPHEM Technology, a Solar Tower Driven Combined GT and ORC With TES. SolarPACES Conference Proceedings, 1. https://doi.org/10.52825/solarpaces.v1i.687

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