TY  - JOUR
A1  - Puppe, Michael
A1  - Giuliano, Stefano
A1  - Frantz, Cathy
A1  - Uhlig, Ralf
A1  - Schumacher, Ralph
A1  - Ibraheem, Wagdi
A1  - Schmalz, Stefan
A1  - Waldmann, Barbara
A1  - Guder, Christoph
A1  - Peter, Dennis
A1  - Schwager, Christian
A1  - Teixeira Boura, Cristiano José
A1  - Alexopoulos, Spiros
A1  - Spiegel, Michael
A1  - Wortmann, Jürgen
A1  - Hinrichs, Matthias
A1  - Engelhard, Manfred
A1  - Aust, Michael
T1  - Techno-economic optimization of molten salt solar tower plants
JF  - AIP Conference Proceedings art.no. 040033
N2  - In this paper the results of a techno-economic analysis of improved and optimized molten salt solar tower plants (MSSTP plants) are presented. The potential improvements that were analyzed include different receiver designs, different designs of the HTF-system and plant control, increased molten salt temperatures (up to 640°C) and multi-tower systems. Detailed technological and economic models of the solar field, solar receiver and high temperature fluid system (HTF-system) were developed and used to find potential improvements compared to a reference plant based on Solar Two technology and up-to-date cost estimations. The annual yield model calculates the annual outputs and the LCOE of all variants. An improved external tubular receiver and improved HTF-system achieves a significant decrease of LCOE compared to the reference. This is caused by lower receiver cost as well as improvements of the HTF-system and plant operation strategy, significantly reducing the plant own consumption. A novel star receiver shows potential for further cost decrease. The cavity receiver concepts result in higher LCOE due to their high investment cost, despite achieving higher efficiencies. Increased molten salt temperatures seem possible with an adapted, closed loop HTF-system and achieve comparable results to the original improved system (with 565°C) under the given boundary conditions. In this analysis all multi tower systems show lower economic viability compared to single tower systems, caused by high additional cost for piping connections and higher cost of the receivers.
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