Impact of Component Improvements Within a Next Generation sCO2 CSP Plant




Concentrating Solar Power, Air Curtain, Solid Body Receiver, Dynamic Process Simulation, Raytracing, Supercritical CO2 Power Cycle, Central Receiver Technology


Several component improvements within a next-generation CSP plant were investigated in the German-project, HelioGLOW, to determine their impact on the system performance. To accomplish this, multiple configurations of an upgraded CRS plant with four different components were parameterized and simulated using a transient simulation model. The four components introduced to the plant as upgrades are: a high temperature solid body receiver, an air curtain that reduces convection losses, a supercritical CO2 power cycle that can operate at a range of temperatures, and an advanced heliostat field. With the result of multiple annual simulations under various operating conditions, configuration optima, performance sensitivity and specific component improvements were identified.


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M. Bitterling et al., "Experimental Test Setup of an Airwall to Reduce the Experimental Test Setup of an Airwall to Reduce the Convective Heat Loss in Solar Thermal Cavity Receivers," in Proceedings of the SOLARPACES 2022: International Conference on Concentrating Solar Power and Chemical Energy Systems, Albuquerque, NM (United States), 2022.

P. Schöttl, G. Bern, P. Nitz, F. Torres, and L. Graf, Raytrace3D by Fraunhofer ISE: Accurate and Efficient Ray Tracing for Concentrator Optics. [Online]. Available: (accessed: Apr. 30 2022).

C. Wittwer, "ColSim - Simulation von Regelungssystemen in aktiven solarthermischen Anlagen," Universität Karlsruhe, Fakultät für Architektur, 1999. [Online]. Available:

D. L. Siebers and J. S. Kraabel, "Estimating Convective Energy Losses From Solar Central Receivers," Sandia National Laboratories SAND-84-8717, 1984.

F. Siala and M. Elayeb, "Mathematical formulation of a graphical method for a no-blocking heliostat field layout," Renewable Energy, vol. 23, no. 1, pp. 77–92, 2001, doi:

E. Leonardi, L. Pisani, I. Les, A. Mutuberria, S. Rohani, and P. Schöttl, "Techno-Economic Heliostat Field Optimization: Comparative Analysis of Different Layouts," Solar Energy, vol. 180, pp. 601–607, 2019, doi:

M. Balz, V. Göcke, T. Keck, F. von Reeken, G. Weinrebe, and M. Wöhrbach, "Stellio – development, construction and testing of a smart heliostat," in AIP Conference Proceedings 1734, 2016, p. 20002. doi:

P. Schöttl, K. Ordóñez Moreno, D. W. van Rooyen, G. Bern, and P. Nitz, "Novel sky discretization method for optical annual assessment of solar tower plants," Sol Energy, vol. 138, pp. 36–46, 2016, doi:

G. Bern, P. Schöttl, D. W. van Rooyen, A. Heimsath, and P. Nitz, "Parallel in-situ measurement of heliostat aim points in central receiver systems by image processing methods," Solar Energy, vol. 180, pp. 648–663, 2019, doi:

M. A. Reyes-Belmonte, A. Sebastián, M. Romero, and J. González-Aguilar, "Optimization of a recompression supercritical carbon dioxide cycle for an innovative central receiver solar power plant," Energy, vol. 112, pp. 17–27, 2016, doi:

S. Trevisan, R. Guédez, and B. Laumert, "Thermo-economic optimization of an air driven supercritical CO2 Brayton power cycle for concentrating solar power plant with packed bed thermal energy storage," Solar Energy, vol. 211, pp. 1373–1391, 2020, doi:

Additional Files


2024-02-02 — Updated on 2024-02-06


How to Cite

Chandler, N., Schöttl, P., Bitterling, M., Bern, G., & Fluri, T. (2024). Impact of Component Improvements Within a Next Generation sCO2 CSP Plant. SolarPACES Conference Proceedings, 1. (Original work published February 2, 2024)

Conference Proceedings Volume


Analysis and Simulation of CSP and Hybridized Systems

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