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Techno-economic study of a concentrated solar thermal plant with sulphur as thermochemical energy storage for baseload power generation and sulphuric acid recycling

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/
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:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Rosenstiel, AndreasAndreas.Rosenstiel (at) dlr.deUNSPECIFIED
Date:31 May 2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science: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:09 Nov 2018 15:34

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