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Nanomaterial-Based Energy Storage and Supply System in Aircraft Systems
Published in Keka Talukdar, Nanomaterials-Based Composites for Energy Applications, 2019
These technologies are divided into three areas:Energy Storage: The advancement in the energy storage systems is observed a lot by the application of nanotechnology. Lithiumion batteries, ultracapacitors offer high power density and energy and are applicable in different missions. On the other side, NMs can be used for preparing electrodes with increased electrolytes and reactivity with better transport properties. These materials or composites should also be able to operate at high temperature.Power Generation: Photovoltaics (PVs) and thermo PV can provide huge power for aircraft and habitats. Piezoelectric and thermoelectric devices can convert vibration or thermopower into an electrical one. But the generated power is only a small amount. The efficiency of conversion is through by replacing the device components by nanocomposites and improving the mechanism of conversion of any power to electrical power.Power Distribution: Power distribution systems include buses, wiring, and harnesses for distribution and power management in spacecraft and aircraft. Nanotechnology can reduce the density of the storage systems and improved the durability by providing more durable conductive materials, lighter weight, and improve thermal management and insulation for wiring in energy distribution systems.
Microwaves and Green Chemistry of Biofuels
Published in Veera Gnaneswar Gude, Microwave-Mediated Biofuel Production, 2017
Current biofuel production is encircled by two major barriers. They are (i) cost of the feedstock, and (ii) energy-efficiency of conversion processes. Moreover, for biofuels to be viable substitutes for fossil fuels, they should offer superior benefits such as higher energy recovery ratio, lower overall life cycle environmental impacts, and attractive economics (Hill et al. 2006). Biofuels can be produced from various feedstock classified as carbohydrate-rich (sugars and starch), lipid-rich (oils and triglycerides) and lignocellulosic (cellulose and hemicellulose) feedstock. Figure 2 shows various biomass feedstock and possible routes for production of biofuels and bio-products (Huber et al. 2006).
Review on advancement in solar and waste heat based thermoelectric generator
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2023
Sanjeev Kumar Bhukesh, Suresh Kumar Gawre, Anil Kumar
Along with transmittance and reflectance of concentrator, properties of the absorber play significant role in determining overall efficiency of the system. Spectrally selective (ε = 0.13 and α = 0.954) solar absorber integrated with Fresnel lens produces good amount of heat. TE module’s efficiency of conversion significantly affects the overall system efficiency as well as the cost. To attain high efficiency, it is practically approached to generate electrical power by utilizing thermal energy with cogeneration system (Sathawane et al. 2014). Regarding simulation and modeling, the FEA method through ANSYS, COMSOL Multi-physics 5.4 and MATLAB can be used for numerical simulation and modeling of TEG under steady state. Non-uniform transient heat flux, waste heat flux, solar energy flux can be simulated through ray tracing Soltrace software (Shittu et al. 2020). Various advantages of TEG are silent operation, the operating life span of TEG is very long (20–25 years), and does not produce any hazardous by-products (Tellurex 2010). It can be extensively used in isolated places and remote areas. Numerous developments have been made.