Wind and Solar Power Systems

Patel, Mukund R.; Beik, Omid

doi:10.1201/9781003042952

Cited by 59 publications

(12 citation statements)

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“…The increasing costs of fossil fuels, pollution, and global warming have increased the pursuit of alternative answers for the energy needs of tomorrow. The variable output of certain types of green alternative energy sources requires an effective method to store electrical energy . Supercapacitors have attracted significant attention as a potential solution because of their ability to be constructed from more environmentally friendly options like carbon-based materials, unlike other electrical storage options. , Additionally, intrinsic properties including fast charge–discharge response time, high power density, and long cycle life make such devices attractive candidates for energy storage solutions. − Such devices combine the high energy density of batteries with the high power density of capacitors.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Orlando

Lima

et al. 2022

ACS Appl. Electron. Mater.

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Capacitors are a ubiquitous component of many modern-day electronics that provide remote sensing, power conditioning, electrical noise filtering, signaling coupling or decoupling, and short-term memory storage. With the desire for flexible, smaller, and more powerful electronics, capacitors and other electrical components will have to be improved to meet these growing demands. Carbon-derived materials are good candidates for use as electrodes in electrochemical capacitors (i.e., supercapacitors) because of their nanoscale and flexible architecture. However, implementations of these materials tend to have inferior specific capacitance and energy density compared with other options. In this work, different carbon derivatives (graphene oxide, Claisen graphene, activated charcoal oxide, and activated charcoal Claisen) were chemically modified via nitrogen doping to optimize the capacitance, power density, energy density, and the overall electrochemical performance of the resulting supercapacitors. Devices with a two-electrode configuration were assembled and confirmed the superior performance for all N-doped carbon derivatives in all analyzed parameters (specific capacitance, energy density, and power density) when compared with their undoped counterparts. The maximum areal capacitance obtained was 421.44 mF/cm2 for the N-doped activated charcoal oxide, which represents an improvement of 242.2% in comparison with the corresponding nonmodified sample, in addition to a 153% improvement in the energy density and strong retention in specific capacitance (in the order of 86% at 1000 cycles of operation).

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Section: Introductionmentioning

confidence: 99%

Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Orlando

Lima

et al. 2022

ACS Appl. Electron. Mater.

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“…The Hellman exponent (friction coefficient) is set empirically and varies with height, hour of the day, time of the year, land features, wind speed and temperature (Bañuelos-Ruedas et al, 2011). Table 1 presents values of friction coefficients for different terrain types depending on surface roughness (Bansal et al, 2002;Masters, 2004;Bañuelos-Ruedas et al, 2011;Patel and Beik, 2021).…”

Section: Wind Speed and Directionmentioning

confidence: 99%

Selected issues of optimising parameters on square riggers to maximise speed

Rafał,

Cezary

2023

J. Navigation

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Due to the exceptional complexity of the propulsion system (sails), square-riggers form a special group of sailing vessels. In modern pleasure and sport sailing, simple Bermuda (triangular) sailing rigging prevails, which is widely discussed in the literature, both in terms of theory and numerous experiments. The literature on the theory on square-riggers is, in turn, limited mainly to the description of good sailing practice developed over the centuries. Its important element was maximising vessel speed, but this discussion has not been documented by scientific research. This paper presents the significant parameters influencing the speed of a square-rigged sailing vessel and selects those which are the most important from the point of view of its maximisation. The paper also proposes methods and measurement systems which optimise selected parameters affecting the achievement of higher speeds. The paper describes the types of speeds of typical sailing vessels, provides a historical synthesis of sailing ships with respect to their speed, and presents a selection and description of the parameters affecting the speed of modern square-rigged vessels. The paper ends with a proposed method and measurement system for experimental research aiming at rigging optimisation in a square-rigged sailing vessel from the point of view of maximising its speed.

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“…The photogenerated current of a solar cell is sensitive to variations in temperature. The effect of temperature is approximately linear [ 15 , 16 ] and must be considered to ensure the final accuracy of IPSS. The temperature compensation model of the output current is formulated as a linear function.…”

Section: Mechatronic Design and Modeling Of Ipssmentioning

confidence: 99%

Design and Verification of an Integrated Panoramic Sun Sensor atop a Small Spherical Satellite

Zhang

2022

Sensors

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This paper proposes an integrated panoramic sun sensor (IPSS) for the small spherical satellite Q-SAT that has been working in orbit since 2020. IPSS is essentially a set of temperature-compensated photoelectric cells distributed on the spherical surface of Q-SAT. Compared with traditional sun sensors, IPSS has full spherical coverage of 4π so that the sun vector from any direction can be inversed. The mechatronic design and mathematical model of the proposed IPSS are presented. In-depth error analyses in terms of albedo effect, sampling error, parameter deviation, etc. are carried out. IPSS can provide a sun vector inversion accuracy of 1.5∘ where albedo disturbance does not dominate. Simulation results show that the measurement of IPSS together with a COTS magnetometer can support the three-axis attitude determination of satellites in various orbits and can adapt to the seasonal variations of subpolar points. Ground experimental results and on-orbit data have also verified the feasibility and performance of IPSS. Although the panoramic sun sensor is designed for the small spherical Q-SAT, it can also be applied to other satellites with limited power budgets.

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Wind and Solar Power Systems

Cited by 59 publications

References 0 publications

Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Selected issues of optimising parameters on square riggers to maximise speed

Design and Verification of an Integrated Panoramic Sun Sensor atop a Small Spherical Satellite

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