Rosenstiel, Andreas (2018) Techno-economic study of a concentrated solar thermal plant with sulphur as thermochemical energy storage for baseload power generation and sulphuric acid recycling. Master's, TU Berlin.
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Abstract
A conceptual design and an economic analysis are presented for a thermochemical energy storage cycle of concentrated solar power which uses elemental sulphur as a storage medium. The thermochemical storage cycle is based on the splitting of sulphuric acid by high temperature solar heat. The heat for the process is provided by a centrifugal particle receiver. Diluted sulphuric acid (38 wt%), a waste product of the chemical industry, is regenerated inside the process. The storage medium sulphur is used in a sulphuric acid plant. Through burning the sulphur, the stored energy can be recuperated at a high temperature level and it can be used as a fuel in a highly efficient combined cycle power plant (gas turbine and steam turbine). Furthermore, high concentrated sulphuric acid (99 wt%, 2600 t/day) is produced as a valuable chemical commodity. The sulphuric acid plant produces 62 MW of electric baseload power, the efficiency (solar Irradiation to electricity) is in the range of 9 %. The price for the electricity generation depends strongly on the compensation price for the sulphuric acid recycling. For an estimated recycling price of 75 USD/t a minimum electricity generation price of 0.18 USD/kWh has been assessed. If in the future the recycling price for sulphuric acid increases to 140 USD/t, the baseload power generation with this process concept would be competitive without further financial funding.
Item URL in elib: | https://elib.dlr.de/122968/ | ||||||||
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Document Type: | Thesis (Master's) | ||||||||
Title: | Techno-economic study of a concentrated solar thermal plant with sulphur as thermochemical energy storage for baseload power generation and sulphuric acid recycling | ||||||||
Authors: |
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Date: | 31 May 2018 | ||||||||
Refereed publication: | No | ||||||||
Open Access: | No | ||||||||
Number of Pages: | 121 | ||||||||
Status: | Published | ||||||||
Keywords: | Sulphur, energy storage, solar thermal, techno-economic analysis | ||||||||
Institution: | TU Berlin | ||||||||
Department: | Institut für Prozess- und Verfahrenstechnik, Fachgebiet Dynamik und Betrieb technischer Anlagen | ||||||||
HGF - Research field: | Energy | ||||||||
HGF - Program: | Renewable Energies | ||||||||
HGF - Program Themes: | Solar Fuels | ||||||||
DLR - Research area: | Energy | ||||||||
DLR - Program: | E SW - Solar and Wind Energy | ||||||||
DLR - Research theme (Project): | E - Solar Fuels (old) | ||||||||
Location: | Köln-Porz | ||||||||
Institutes and Institutions: | Institute of Solar Research > Solar Chemical Engineering | ||||||||
Deposited By: | Sattler, Prof. Dr. Christian | ||||||||
Deposited On: | 09 Nov 2018 15:34 | ||||||||
Last Modified: | 22 Apr 2025 09:25 |
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