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Economic analysis and life cycle assessment of concrete thermal energy storage for parabolic through power plants

  • For parabolic trough power plants using synthetic oil as the heat transfer medium, the application of solid media sensible heat storage is an attractive option in terms of investment and maintenance costs. One important aspect in storage development is the storage integration into the power plant. A modular operation concept for thermal storage systems was previously suggested by DLR, showing an increase in storage capacity of more than 100 %. However, in these investigations, the additional costs needed to implement this storage concept into the power plant, like for extra piping, valves, pumps and control had not been considered. These aspects are discussed in this paper, showing a decrease of levelized energy costs with modular storageFor parabolic trough power plants using synthetic oil as the heat transfer medium, the application of solid media sensible heat storage is an attractive option in terms of investment and maintenance costs. One important aspect in storage development is the storage integration into the power plant. A modular operation concept for thermal storage systems was previously suggested by DLR, showing an increase in storage capacity of more than 100 %. However, in these investigations, the additional costs needed to implement this storage concept into the power plant, like for extra piping, valves, pumps and control had not been considered. These aspects are discussed in this paper, showing a decrease of levelized energy costs with modular storage integration of 2 to 3 %. In a Life Cycle Assessment (LCA) a comparison of an AndaSol-I type solar thermal power plant [1] with the original two-tank molten salt storage and with a "hypothetical" concrete storage shows an advantage of the concrete storage technology concerning environmental impacts. The environmental impacts of the “hypothetical” concrete based AndaSol-I decrease by 7 %, considering 1 kWh of solar electricity delivered to the grid. Regarding only the production of the power plant, the emissions decrease by 9.5 %.show moreshow less

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Metadaten
Document Type:Peer-Reviewed Article
Author:Doerte Laing, Wolf-Dieter Steinmann, Peter ViebahnORCiDGND, Frieder Gräter, Carsten Bahl
Year of Publication:2010
Language:English
Source Title (English):Journal of solar energy engineering
DOI:https://doi.org/10.1115/1.4001404
Volume:132
Issue:4
First Page:410131
Last Page:410136
Division:Zukünftige Energie- und Mobilitätsstrukturen
Dewey Decimal Classification:600 Technik, Medizin, angewandte Wissenschaften