Chemical and thermal performance analysis of a solar thermochemical reactor for hydrogen production via two-step WS cycle

Sharma, Jeet Prakash; Kumar, Ravinder; Ahmadi, Mohammad Hossein; Mukhtar, Azfarizal; Yasir, Ahmad Shah Hizam Md; Sharifpur, Mohsen; Ongar, Bulbul; Yegzekova, Anara

doi:10.1016/j.egyr.2023.06.012

Cited by 8 publications

(1 citation statement)

References 69 publications

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“…Concentration systems can be used directly or indirectly for the production of thermal energy [7][8][9][10], fresh water [11,12] and synthesis gas [13][14][15]. A further use is for the production of electrical energy using Stirling engines inserted in the focal zone of the concentrator [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Solar Disc Concentrator: Material Selection for the Receiver

Perrero,

Papurello

2023

Energies

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Solar concentration is the ability to harness solar radiation in order to increase the temperature of a receiver. The receiver is a component into which a heat transfer fluid can flow in an ORC system, which produces electricity, or it can be used for high-temperature thermal storage or even to implement thermochemical cycles. The choice of material is critical to ensure optimal performance and long-lasting operation. It is also essential that such material can operate at high temperatures and high thermal gradients. In short, material identification involves high thermal stresses that result in structural deformation. Different metal alloys were used to verify that the yield strength limit was not exceeded due to thermal stress induced by concentrated solar radiation. Starting with the general heat equation, the problem was implemented in Matlab. The purpose was to test whether thermal stress exceeds the yield strength, which is the condition in which elastic bonds in the material are changed, causing deformation. This condition, if exceeded, is sufficient to discard the material; otherwise, it is a necessary but not sufficient condition to resist over time. The best material identified was Inconel 740H, which had a high yield strength value and the lowest temperature difference. Under extreme working conditions, it withstood induced thermal shocks.

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Section: Introductionmentioning

confidence: 99%

Solar Disc Concentrator: Material Selection for the Receiver

Perrero,

Papurello

2023

Energies

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An updated review and perspective on efficient hydrogen generation via solar thermal water splitting

Tran,

Warren,

Wilson

et al. 2024

WIREs Energy & Environment

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Solar thermal water splitting (STWS) produces renewable (or green) hydrogen from water using concentrated sunlight. Because STWS utilizes energy from the entire solar spectrum to drive the reduction–oxidation (redox) reactions that split water, it can achieve high theoretical solar‐to‐hydrogen efficiencies. In a two‐step STWS process, a metal oxide that serves as a redox mediator is first heated with concentrated sunlight to high temperatures (T >1000°C) to reduce it and evolve oxygen. In the second step, the reduced material is exposed to steam to reoxidize it to its original oxidation state and produce hydrogen. Various aspects of this process are comprehensively reviewed in this work, including the reduction and oxidation chemistries of active materials considered to date, the solar reactors developed to facilitate the STWS reactions, and the effects of operating conditions—including the recent innovation of elevated oxidant pressure—on efficiency. To conclude the review, a perspective on the future optimization of STWS is provided.This article is categorized under: Sustainable Energy > Solar Energy Emerging Technologies > Hydrogen and Fuel Cells Emerging Technologies > New Fuels

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Advances in the Solar Thermal Systems Assisted Production of Green Hydrogen: Its Analysis, Scaling-Up Techniques, and Economics Aspects as Applied to Tropical Regions

Patel,

Tyagi

2024

Energy, Environment, and Sustainability

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Chemical and thermal performance analysis of a solar thermochemical reactor for hydrogen production via two-step WS cycle

Cited by 8 publications

References 69 publications

Solar Disc Concentrator: Material Selection for the Receiver

Solar Disc Concentrator: Material Selection for the Receiver

An updated review and perspective on efficient hydrogen generation via solar thermal water splitting

Advances in the Solar Thermal Systems Assisted Production of Green Hydrogen: Its Analysis, Scaling-Up Techniques, and Economics Aspects as Applied to Tropical Regions

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