Solar power tower as heat and electricity source for a solid oxide electrolyzer: a case study

Houaijia, Anis; Roeb, Martin; Monnerie, Nathalie; Sattler, Christian

doi:10.1002/er.3316

Cited by 28 publications

(10 citation statements)

References 16 publications

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“…Furthermore, the chemical compatibility of these materials with Ni as the most employed hydrogen electrode for SOEs is impressive . To commercialize SOE system and use it in hydrogen production process in a large scale, the arisen problems due to the high temperature nature of SOE systems such as degradation and lack of stability should be solved …”

Section: Concentrated Solar Thermal Hydrogen Productionmentioning

confidence: 99%

“…139 To commercialize SOE system and use it in hydrogen production process in a large scale, the arisen problems due to the high temperature nature of SOE systems such as degradation and lack of stability should be solved. 140 Table 4 summarizes solar hydrogen production potentials by integrating different solar systems and various water splitting technologies. 141 Paul and Andrews 142 directly connected four 75-W PV modules to five 50-W PEM electrolyzer to investigate the optimal method of series-parallel connection of both the PEM cells and the PV panels.…”

Section: Hydrogen From Solid Oxide Electrolyzersmentioning

confidence: 99%

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Hydrogen from solar energy, a clean energy carrier from a sustainable source of energy

2020

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Summary Solar energy is going to play a crucial role in the future energy scenario of the world that conducts interests to solar‐to‐hydrogen as a means of achieving a clean energy carrier. Hydrogen is a sustainable energy carrier, capable of substituting fossil fuels and decreasing carbon dioxide (CO2) emission to save the world from global warming. Hydrogen production from ubiquitous sustainable solar energy and an abundantly available water is an environmentally friendly solution for globally increasing energy demands and ensures long‐term energy security. Among various solar hydrogen production routes, this study concentrates on solar thermolysis, solar thermal hydrogen via electrolysis, thermochemical water splitting, fossil fuels decarbonization, and photovoltaic‐based hydrogen production with special focus on the concentrated photovoltaic (CPV) system. Energy management and thermodynamic analysis of CPV‐based hydrogen production as the near‐term sustainable option are developed. The capability of three electrolysis systems including alkaline water electrolysis (AWE), polymer electrolyte membrane electrolysis, and solid oxide electrolysis for coupling to solar systems for H2 production is discussed. Since the cost of solar hydrogen has a very large range because of the various employed technologies, the challenges, pros and cons of the different methods, and the commercialization processes are also noticed. Among three electrolysis technologies considered for postulated solar hydrogen economy, AWE is found the most mature to integrate with the CPV system. Although substantial progresses have been made in solar hydrogen production technologies, the review indicates that these systems require further maturation to emulate the produced grid‐based hydrogen.

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Section: Concentrated Solar Thermal Hydrogen Productionmentioning

confidence: 99%

Section: Hydrogen From Solid Oxide Electrolyzersmentioning

confidence: 99%

Hydrogen from solar energy, a clean energy carrier from a sustainable source of energy

2020

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“…In it, a quantitative relationship between current density and key voltage losses is established, including losses due to thermodynamics, kinetics, ohmic, and mass transport, and results of this paper demonstrate that the oxygen evolution reaction and bubble effects play a vital role in determining electrolyzer performance. High‐temperature steam electrolysis ( HTSE ), which consists of the splitting of steam into hydrogen and oxygen at high temperature in solid oxide electrolyzers, is studied in Houaijia et al, and the dynamic behavior of the system during energy fluctuations has been analyzed. It proposes that the operating parameters of the electrolyzer, namely the temperature and the pressure, have a great impact on the overall efficiency.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the external electrical thermal and dynamic power characteristics of alkaline water electrolyzer

Shen

Zhang

et al. 2018

Int J Energy Res

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Summary As hydrogen production with a water electrolyzer is an effective way for renewable energy consumption, understanding the external electrical characteristics of water electrolyzer is of great significance for the modeling and simulation, system configuration, and control strategy of the system for hydrogen production by renewable energy. However, there are relatively fewer studies in this area. This paper presents the establishment of an experimental platform to conduct an experimental study on the static and dynamic voltage‐current characteristics and analyze the adjustability of the electric power of the traditional alkaline water electrolyzer, the relationship between the electrical characteristics and the electrolyte temperature, and operating point of the alkaline water electrolyzer. In addition, the mathematical fitting problem of the electrical characteristics of the alkaline water electrolyzer is discussed. The work could supply a reference to alkaline water electrolyzer intergrated application in renewable energy.

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“…Solar energy is a versatile source and can be incorporated in HTE systems as a supplier of electricity through concentrated solar power (CSP) or photovoltaics (PV), in addition to being a supplier of high-temperature heat through concentrated solar heat. HTE driven by concentrated solar technologies is interesting because high-temperature steam and CO 2 can be supplied to simultaneously produce both electrical power (by a conventional power cycle), and high temperature reactants (direct heating by the solar receiver) for the electrolysis process (Houaijia et al, 2015;Padin, 2000). Design guidelines for optimized concentrated solar-driven HTE systems have been proposed based on a system process model (AlZahrani and Dincer, http://dx.doi.org/10.1016/j.solener.2017.07.077 0038-092X/Ó 2017 Elsevier Ltd. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

Techno-economic modeling and optimization of solar-driven high-temperature electrolysis systems

Lin

Haussener

2017

Solar Energy

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a b s t r a c tWe present a techno-economic analysis of solar-driven high-temperature electrolysis systems used for the production of hydrogen and synthesis gas. We consider different strategies for the incorporation of solar energy, distinguished by the use of differing technologies to provide solar power and heat: (i) thermal approaches (system 1) using concentrated solar technologies to provide heat and to generate electricity through thermodynamic cycles, (ii) electrical approaches (system 2) using photovoltaic technologies to provide electricity and to generate heat through electrical heaters, and (iii) hybrid approaches (system 3) utilizing concentrated solar technologies and photovoltaics to provide heat and electricity, respectively. We find that system 3 generates hydrogen at a high efficiency (g STF = 9.9%, slightly lower than the best performing system 1 with 10.6%) and at a low cost (C fuel = $4.9/kg, lowest cost of all three systems) at reference conditions, providing evidence for the competitiveness of this hybrid approach for scaled solar hydrogen generation. Sensitivity analysis indicates an optimal working temperature for system 3 of 1350 K, which balances the increased thermal receiver losses with the reduced electrolysis cell potential when increasing the temperature. Lower working pressure always favors high system efficiency and low cost. The working current densities for thermoneutral voltage were determined for various temperature and pressure combinations, and trends for efficient and cost-effective thermoneutral operation were identified. The water conversion extent was optimized to avoid mass transport limitations in the electrodes while ensuring large fuel generation rates. For synthesis gas production, a H 2 /CO molar ratio of 2 can be achieved by tuning the inlet feeding molar ratio of CO 2 / H 2 O, temperature, and pressure. This study introduces a flexible simulation framework of solar-driven high-temperature electrolysis systems allowing for the assessment of competing solar integration approaches and for the guidance of the operational conditions maximizing efficiency and minimizing cost, providing pathways for scalable solar fuel processing.

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Solar power tower as heat and electricity source for a solid oxide electrolyzer: a case study

Cited by 28 publications

References 16 publications

Hydrogen from solar energy, a clean energy carrier from a sustainable source of energy

Hydrogen from solar energy, a clean energy carrier from a sustainable source of energy

Experimental study on the external electrical thermal and dynamic power characteristics of alkaline water electrolyzer

Techno-economic modeling and optimization of solar-driven high-temperature electrolysis systems

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