402 results found
Wang Y, Banerjee A, Wehrle L, et al., 2019, Performance analysis of a reversible solid oxide cell system based on multi-scale hierarchical solid oxide cell modelling, Energy Conversion and Management, Vol: 196, Pages: 484-496, ISSN: 0196-8904
© 2019 Elsevier Ltd The increasing penetration of intermittent renewable energy into power grids calls for energy storage means to balance the electricity production and consumption. The reversible solid oxide cell is a promising technology for distributed renewable energy storage. A system-level model is a useful tool for system design and efficiency optimization. In this study, a reversible solid oxide cell system model was developed in gPROMS ModelBuilder for distributed energy storage applications by integrating a multi-scale hierarchical three-dimensional solid oxide cell stack model with zero-dimensional balance of plant components models. The hierarchical rSOC stack model considers the electrochemical reactions at the electrodes, the one-dimensional + one-dimensional thermo-fluidic transport along the thickness and the flow direction at repeating unit level, and the three-dimensional heat transfer at stack level. The proposed system model enables the simultaneous investigations on both the total system performance and detailed stack temperature distributions. The roundtrip stack efficiency and roundtrip system efficiency reached 72.3% and 58.3% respectively at base case operation conditions. The effects of excess air ratio and fuel utilization on the system efficiency as well as the temperature uniformity of the reversible solid oxide cell stack were investigated. While increasing the excess air ratio decreases stack temperature gradients, it also decreases both the stack and system roundtrip efficiency. However, improved fuel utilization decreases stack temperature gradients without affecting the stack and system roundtrip efficiency.
Gayon Lombardo A, Simon BA, Taiwo O, et al., 2019, A pore network model of porous electrodes in electrochemical devices, Journal of Energy Storage, Vol: 24
© 2019 Elsevier Ltd A computationally efficient pore network model (PNM) has been developed to incorporate the transport and electrochemical phenomena occurring within porous electrodes. This PNM is validated on a synthetic cubic structure and subsequently run on a network obtained from X-ray computed tomography (X-CT) images of a sample of commercial porous carbon paper commonly used in electrochemical devices. The carbon paper's physical characteristics (pore-size distribution, permeability, porosity and electroactive surface area) are discussed. The concentration distribution of active species is examined considering solely the transient convective and diffusive transport processes initially, and subsequently is compared to the concentration of active species when migration and reactive transport factors are included. The results show non-uniformity in the concentration and pressure distributions in the electrode when considering the pure convective/diffusive transport processes. The migration and reactive processes are subsequently considered and are shown to be influenced by the rate in which the convective/diffusive flow permeates the electrode. A uniform steady decline in volume-averaged state of charge is shown, followed by a pore-scale non-uniform current density and state of charge distribution upon discharge. These results were obtained on a standard single core workstation highlighting the benefits of using a computationally inexpensive model.
Ouyang M, Boldrin P, Maher RC, et al., 2019, A mechanistic study of the interactions between methane and nickel supported on doped ceria, APPLIED CATALYSIS B-ENVIRONMENTAL, Vol: 248, Pages: 332-340, ISSN: 0926-3373
Crow DJG, Balcombe P, Brandon N, et al., 2019, Assessing the impact of future greenhouse gas emissions from natural gas production, SCIENCE OF THE TOTAL ENVIRONMENT, Vol: 668, Pages: 1242-1258, ISSN: 0048-9697
Song B, Bertei A, Wang X, et al., 2019, Unveiling the mechanisms of solid-state dewetting in Solid Oxide Cells with novel 2D electrodes, JOURNAL OF POWER SOURCES, Vol: 420, Pages: 124-133, ISSN: 0378-7753
Chen X, Liu X, Ouyang M, et al., 2019, Multi-metal 4D printing with a desktop electrochemical 3D printer, SCIENTIFIC REPORTS, Vol: 9, ISSN: 2045-2322
Liu X, Taiwo OO, Yin C, et al., 2019, Aligned lonogel Electrolytes for High-Temperature Supercapacitors, ADVANCED SCIENCE, Vol: 6, ISSN: 2198-3844
Song W, Liu X, Wu B, et al., 2019, Sn@C evolution from yolk-shell to core-shell in carbon nanofibers with suppressed degradation of lithium storage, ENERGY STORAGE MATERIALS, Vol: 18, Pages: 229-237, ISSN: 2405-8297
Yufit V, Tariq F, Eastwood DS, et al., 2019, Operando Visualization and Multi-scale Tomography Studies of Dendrite Formation and Dissolution in Zinc Batteries, JOULE, Vol: 3, Pages: 485-502, ISSN: 2542-4351
Trudgeon DP, Qiu K, Li X, et al., 2019, Screening of effective electrolyte additives for zinc-based redox flow battery systems, JOURNAL OF POWER SOURCES, Vol: 412, Pages: 44-54, ISSN: 0378-7753
Speirs J, Balcombe P, Blomerus P, et al., 2019, Can natural gas reduce emissions from transport?: Heavy goods vehicles and shipping
Budinis S, Krevor S, Mac Dowell N, et al., 2018, An assessment of CCS costs, barriers and potential, ENERGY STRATEGY REVIEWS, Vol: 22, Pages: 61-81, ISSN: 2211-467X
Balcombe P, Speirs JF, Brandon NP, et al., 2018, Methane emissions: choosing the right climate metric and time horizon, ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS, Vol: 20, Pages: 1323-1339, ISSN: 2050-7887
Crow DJG, Anderson K, Hawkes AD, et al., 2018, Impact of Drilling Costs on the US Gas Industry: Prospects for Automation, ENERGIES, Vol: 11, ISSN: 1996-1073
Zhang D, Cai Q, Taiwo OO, et al., 2018, The effect of wetting area in carbon paper electrode on the performance of vanadium redox flow batteries: A three-dimensional lattice Boltzmann study, ELECTROCHIMICA ACTA, Vol: 283, Pages: 1806-1819, ISSN: 0013-4686
Tariq F, Rubio-Garcia J, Yufit V, et al., 2018, Uncovering the mechanisms of electrolyte permeation in porous electrodes for redox flow batteries through real time in situ 3D imaging, SUSTAINABLE ENERGY & FUELS, Vol: 2, Pages: 2068-2080, ISSN: 2398-4902
Bertei A, Yufit V, Tariq F, et al., 2018, A novel approach for the quantification of inhomogeneous 3D current distribution in fuel cell electrodes, JOURNAL OF POWER SOURCES, Vol: 396, Pages: 246-256, ISSN: 0378-7753
Song B, Ruiz-Trejo E, Brandon NP, 2018, Enhanced mechanical stability of Ni-YSZ scaffold demonstrated by nanoindentation and Electrochemical Impedance Spectroscopy, JOURNAL OF POWER SOURCES, Vol: 395, Pages: 205-211, ISSN: 0378-7753
Balcombe P, Speirs J, Johnson E, et al., 2018, The carbon credentials of hydrogen gas networks and supply chains, RENEWABLE & SUSTAINABLE ENERGY REVIEWS, Vol: 91, Pages: 1077-1088, ISSN: 1364-0321
Few S, Schmidt O, Offer GJ, et al., 2018, Prospective improvements in cost and cycle life of off-grid lithium-ion battery packs: An analysis informed by expert elicitations, ENERGY POLICY, Vol: 114, Pages: 578-590, ISSN: 0301-4215
Mazur C, Offer GJ, Contestabile M, et al., 2018, Comparing the Effects of Vehicle Automation, Policy-Making and Changed User Preferences on the Uptake of Electric Cars and Emissions from Transport, SUSTAINABILITY, Vol: 10, ISSN: 2071-1050
Chen Z, Wang X, Brandon N, et al., 2018, Numerical Study of Solid Oxide Fuel Cell Contacting Mechanics, FUEL CELLS, Vol: 18, Pages: 42-50, ISSN: 1615-6846
Balcombe P, Brandon NP, Hawkes AD, 2018, Characterising the distribution of methane and carbon dioxide emissions from the natural gas supply chain, JOURNAL OF CLEANER PRODUCTION, Vol: 172, Pages: 2019-2032, ISSN: 0959-6526
Song B, Ruiz-Trejo E, Bertei A, et al., 2018, Quantification of the degradation of Ni-YSZ anodes upon redox cycling, JOURNAL OF POWER SOURCES, Vol: 374, Pages: 61-68, ISSN: 0378-7753
Hack J, Heenan TMM, Iacoviello F, et al., 2018, A Structure and Durability Comparison of Membrane Electrode Assembly Fabrication Methods: Self-Assembled Versus Hot-Pressed, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 165, Pages: F3045-F3052, ISSN: 0013-4651
Chen X, Liu X, Childs P, et al., 2018, Design and fabrication of a low cost desktop electrochemical 3D printer, Pages: 395-400, ISSN: 2424-8967
Copyright © 2018 by Nanyang Technological University. Additive manufacturing (AM) (3D printing) is the process of creating 3D objects from digital models through the layer by layer deposition of materials. Electrochemical additive manufacturing (ECAM) is a relatively new technique which can create metallic components based depositing adherent layers of metal ions onto the surface of conductive substrate. In this paper, the design considerations for a meniscus confined ECAM approach is presented which demonstrates superior print speeds to equivalent works. This is achieved through the increase of the meniscus diameter to 400 \im which was achieved through the integration of a porous sponge into the print head to balance the hydraulic head of the electrolyte. Other piston based methods of controlling the electrolyte meniscus are discussed.
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