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Sample average approximation and stability tests applied to energy system design
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Performance and operating limits of a sorbent-catalyst system for sorption-enhanced reforming (SER) in a fluidized bed reactor
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Endogenous soiling rate determination and detection of cleaning events in utility scale PV plants
Get PDFAs the deployment rate of PV power plants continuesto soar, the need for robust, scalable methods for performanceanalytics increases. In this paper, we demonstrate the usefulness ofone approach for quantifying soiling rates in utility-scale PV powerplants endogenously, i.e., directly from the production data. Thetemperature corrected performance ratio, normalized to a cleanstate, is used to derive the soiling ratio (SR). Cleaning events, causedby either rain or manual cleaning, are automatically detected bypositive shifts in the running median of the SR time series. Soilingrates are then estimated by the rate of change of the SR betweenthe cleaning events, which is determined by linear regression. Themethod is validated on data from three utility-scale PV powerplants in the Middle East, yielding soiling rates that are in therange 0%–0.18%/day at least 50% of the time, with a median of 0.1%/day.publishedVersio
Sonochemistry-assisted fabrication of 1D-ZnSb2O6@2D-MoS2 nanostructures: A synergistic energy storage material for supercapacitors
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Techno-economic calculations of small-scale hydrogen supply systems for zero emission transport in Norway
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Fixed Bed Reactor Validation of a Mayenite Based Combined Calcium–Copper Material for Hydrogen Production through Ca–Cu Looping
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Investigation of n-Al:ZnO/p-Cu2O heterojunction for c-Si tandem heterojunction solar cell applications
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Electrochemical Performance of Nitrogen-Doped TiO2 Nanotubes as Electrode Material for Supercapacitor and Li-Ion Battery
Get PDFElectrochemical anodized titanium dioxide (TiO2) nanotubes are of immense significance as electrochemical energy storage devices owing to their fast electron transfer by reducing the diffusion path and paving way to fabricating binder-free and carbon-free electrodes. Besides these advantages, when nitrogen is doped into its lattice, doubles its electrochemical activity due to enhanced charge transfer induced by oxygen vacancy. Herein, we synthesized nitrogen-doped TiO2 (N-TiO2) and studied its electrochemical performances in supercapacitor and as anode for a lithium-ion battery (LIB). Nitrogen doping into TiO2 was confirmed by Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) techniques. The electrochemical performance of N-TiO2 nanotubes was outstanding with a specific capacitance of 835 μF cm−2 at 100 mV s−1 scan rate as a supercapacitor electrode, and it delivered an areal discharge capacity of 975 μA h cm−2 as an anode material for LIB which is far superior to bare TiO2 nanotubes (505 μF cm−2 and 86 μA h cm−2, respectively). This tailor-made nitrogen-doped nanostructured electrode offers great promise as next-generation energy storage electrode material.publishedVersio