This paper focuses on energy harvesting by using exhaust gases from heavy vehicles (loader trucks and buses) to improve fuel efficiency and reduce environmental impacts. The experimental setup includes two steel cylin...
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Thanks to the benefits of non-orthogonal multiple access (NOMA) in wireless communications, we evaluate a wireless sensor network deploying NOMA (WSN-NOMA), where the destination can receive two data symbols in a whol...
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Thanks to the benefits of non-orthogonal multiple access (NOMA) in wireless communications, we evaluate a wireless sensor network deploying NOMA (WSN-NOMA), where the destination can receive two data symbols in a whole transmission process with two time slots. In this work, two relaying protocols, so-called time-switching-based relaying WSN-NOMA (TSR WSN-NOMA) and power-splitting-based relaying WSN-NOMA (PSR WSN-NOMA) are deployed to study energy-harvesting (EH). Regarding the system performance analysis, we obtain the closed-form expressions for the exact and approximate outage probability (OP) in both protocols, and the delay-limited throughput is also evaluated. We then compare the two protocols theoretically, and two optimization problems are formulated to reduce the impact of OP and optimize the data rate. Our numerical and simulation results are provided to prove the theoretical and analytical analysis. Thanks to these results, a great performance gain can be achieved for both TSR WSN-NOMA and PSR WSN-NOMA if optimal values of TS and PS ratios are found. In addition, the optimized TSR WSN-NOMA outperforms that of PSR WSN-NOMA in terms of OP.
Organic photovoltaics (OPVs) die due to their interactions with environmental gases, i.e., moisture and oxygen, the latter being the most dangerous, especially under illumination, due to the fact that most of the acti...
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Solar energy is one of the most important renewable energy sources, with a wide range of applications, and photovoltaic hybrid thermal compounds offer one of the most important modern technologies for simultaneously g...
Solar energy is one of the most important renewable energy sources, with a wide range of applications, and photovoltaic hybrid thermal compounds offer one of the most important modern technologies for simultaneously generating electrical and thermal energy while saving space by combining the two systems. This paper offers a design that facilitates comparison of a solar thermal collector and photovoltaic panel to a hybrid photovoltaic thermal collector to determine whether the addition of paraffin wax to the photovoltaic thermal (PVT) collector improves overall efficiency as compared to the total efficiency of the photovoltaic panel and solar thermal collector separately. The results show that the overall efficiency of the PVT was improved as compared to the overall efficiency of the photovoltaic and flat-plate collector (PV, FPC). The PVT’s overall efficiencies in December, January, and April were 84.95%, 98%, and 93.5%, respectively, while the photovoltaic and flat-plate collector combination (PV+FPC) produced 48.61%, 67.17%, and 72.73% efficiencies, respectively.
The study represents an enhancement of heat transfer using different nanofluids containing nanoparticles (Al2O3, Cu, Ag, TiO2, SiO2, Fe) Volume fraction (0.02≤≤0.05). Numerical simulations are conducted using CFD (C...
The study represents an enhancement of heat transfer using different nanofluids containing nanoparticles (Al2O3, Cu, Ag, TiO2, SiO2, Fe) Volume fraction (0.02≤≤0.05). Numerical simulations are conducted using CFD (Computational Fluid Dynamics) and the model is generated using Solid works. The governing equations are solved using a SIMPLE technique and discretized using finite volume approach. The results show that the heat transfer rate increases with the increase of the flow rates, also it has been observed that heat transfer rate increases with increase of operating temperature and also by the concentration of nanoparticles.
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