Holzemer-Zerhusen, Philipp and Brendelberger, Stefan and Roeb, Martin and Sattler, Christian (2020) Oxygen Crossover in Solid-Solid Heat Exchangers for Solar Water and Carbon Dioxide Splitting: A Thermodynamic Analysis. Journal of Energy Resources Technology, 143 (7), 071301-1. American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4048772. ISSN 0195-0738.
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Abstract
In solar thermochemical redox cycles for H2O/CO2-splitting, a large portion of the overall energy demand of the system is associated with heating the redox material from the oxidation temperature to the reduction temperature. Hence, an important measure to improve the efficiency is recuperation of sensible heat stored in the redox material. A solid-solid heat exchanger can be subjected to undesirable oxygen crossover, which decreases the oxygen uptake capacity of the redox material and consequently the system efficiency. We investigate the extent of this crossover in ceria-based cycles, to identify, under which conditions a heat exchanger that allows oxygen crossover can improve the system efficiency. In a thermodynamic analysis, we calculate the amount of transferred oxygen as a function of the heat exchanger efficiency and show the system efficiency of such a concept. A second law analysis is applied to the model to check the feasibility of calculated points of operation. For the investigated parameter set, the heat exchanger design improves the system efficiency by a factor of up to 2.1.
Item URL in elib: | https://elib.dlr.de/137905/ | ||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||
Title: | Oxygen Crossover in Solid-Solid Heat Exchangers for Solar Water and Carbon Dioxide Splitting: A Thermodynamic Analysis | ||||||||||||||||||||
Authors: |
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Date: | 13 October 2020 | ||||||||||||||||||||
Journal or Publication Title: | Journal of Energy Resources Technology | ||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||
Volume: | 143 | ||||||||||||||||||||
DOI: | 10.1115/1.4048772 | ||||||||||||||||||||
Page Range: | 071301-1 | ||||||||||||||||||||
Publisher: | American Society of Mechanical Engineers (ASME) | ||||||||||||||||||||
ISSN: | 0195-0738 | ||||||||||||||||||||
Status: | Published | ||||||||||||||||||||
Keywords: | solar chemistry, water splitting, carbon dioxide-splitting, redox cycle, solid-solid heat exchanger, alternative energy sources, hydrogen energy, renewable energy | ||||||||||||||||||||
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 Institute of Solar Research > Solar Chemical Engineering | ||||||||||||||||||||
Deposited By: | Roeb, Dr.rer.nat. Martin | ||||||||||||||||||||
Deposited On: | 23 Nov 2020 12:21 | ||||||||||||||||||||
Last Modified: | 05 Dec 2023 07:09 |
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