Title: Profitability Analysis and Capital Cost Estimation of a Thermochemical Energy Storage System Utilizing Fluidized Bed Reactors and the Reaction System MgO/Mg(OH)2
Authors: Flegkas, Stylianos 
Birkelbach, Felix 
Winter, Franz 
Groenewold, Hans 
Werner, Andreas 
Category: Original Research Article
Issue Date: 16-Dec-2019
Citation: 
Flegkas, S., Birkelbach, F., Winter, F., Groenewold, H., & Werner, A. (2019). Profitability Analysis and Capital Cost Estimation of a Thermochemical Energy Storage System Utilizing Fluidized Bed Reactors and the Reaction System MgO/Mg(OH)2. Energies, 12(24), 1–16. https://doi.org/10.3390/en12244788
Journal: Energies 
ISSN: 1996-1073
Abstract: 
The storage of industrial waste heat through thermochemical energy storage (TCES) shows high potential to reduce the dependency on fossil fuels. In this paper the capital cost investment of a TCES system utilizing fluidized bed reactors and the reaction system MgO/Mg(OH)2 is estimated and a profitability analysis is performed. The study estimate is based on a simulation study that considers the mass and energy balance of the proposed preliminary heat storage and release processes utilizing fluidized bed reactors. Furthermore, transport, operation and maintenance as well as utility costs were estimated in order to evaluate the profitability of the system. It is concluded that for the selected boundary conditions, the specific investment costs per kW stored heat are approximately 900 e/kW and that the systems should not be installed at sites where less than around 5 MW of waste heat are available. Finally, a sensitivity analysis was conducted, to identify the key process and economic parameters critical for a positive net present value.
Keywords: capital cost estimation; economic analysis; thermochemical energy storage; waste heat recovery
DOI: 10.3390/en12244788
Organisation: E302 - Institut für Energietechnik und Thermodynamik 
License: CC BY 4.0 CC BY 4.0
Publication Type: Article
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