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Energy Conversion Efficiency in Nanotube Optoelectronics
Nano Letters, 2005We present theoretical performance estimates for nanotube optoelectronic devices under bias. Current-voltage characteristics of illuminated nanotube p-n junctions are calculated using a self-consistent nonequilibrium Green's function approach. Energy conversion rates reaching tens of percent are predicted for incident photon energies near the band gap ...
Derek A, Stewart, François, Léonard
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Analysis of Magnetoelastic Conversion Efficiency
Journal of Applied Physics, 1966Coupling of spin waves and elastic waves in ferrimagnetic materials is investigated theoretically. The magnetoelastic equations are transformed into coupled equations for fast and slow hybrid waves; the magnetoelastic coupling mechanism is then treated as a distributed directional coupler where the velocities of quasinormal modes are slowly tapered ...
E. K. Kirchner +3 more
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High Efficiency Thermoelectric Power Conversion
MRS Proceedings, 2005ABSTRACTRecent efforts at Teledyne Energy Systems, Inc. have lead to significant improvements in thermoelectric (TE) materials and power conversion devices. A number of improved formulations have been identified for standard n-type PbTe and p-type TAGS alloys. The preliminary test results appear to show nearly a 50% increase in the dimensionless figure-
Donald F. Byrnes, Ben Heshmatpour
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Efficient Optical to Microwave Conversion
IEEE Microwave Magazine, 2014Modern-day communications often involve the use of specially designed fiber-optic channels as a guided wave propagation medium. Information is carried through this medium as a modulated light beam, which can then be received and utilized in a manner similar to traditional analog signaling.
Daniel Fisher, Klevore Burden
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1995
Using program transformation techniques from the field of partial evaluation an automatic tool for generating very efficient conversions from equality-stating theorems has been implemented.
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Using program transformation techniques from the field of partial evaluation an automatic tool for generating very efficient conversions from equality-stating theorems has been implemented.
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Efficiency Regulations: Driving power conversion efficiency designs
IEEE Power Electronics Magazine, 2017In recent decades, government agencies developed programs to improve the efficiency of our electronic products and appliances. A 1999 study estimated that up to 10% of electricity consumed by residential products was wasted when products had been turned off by consumers [1].
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Conversion efficiency of catalytic converter
International Journal of Ambient Energy, 2015Around 50 million vehicles are manufactured every year and over 700 million vehicles are used worldwide. Vehicle population is predictable to grow close to 1300 million by the year 2030. Automobile produced 10,037,168 short tons of nitrogen oxides and 59,383,083 short tons of carbon dioxide in 2008 alone.
S.K. Sharma, P. Goyal, R.K. Tyagi
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Solar Energy Conversion Efficiency Project
1989Report of a discussion on possible collaborative experimentation to test and refine biomass production models based on the conversion of solar energy by plant stands, and to evaluate alternative models.
J. S. Pereira, J. J. Landsberg
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Energy Efficiency and Conversion
Abstract:The increase demand of energy is due to advance technology and appliances. However, fossil fuel-sourced energy is harmful for environment. Green energy is an alternative to curbing the energy demand. Photovoltaic cells, hydro turbines, and fuel cells are the most efficient sources of green energy. Fuel cells have been modified to utilize fuelsShabbir, Safoora +3 more
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Efficient up-conversion in CdSe
Optics Communications, 1976Abstract In this work up-conversion in CdSe with a HF laser as a pump and an experimental quantum efficiency higher than 40% is reported. With this device, it is possible to obtain up-conversion in the 8–25 μ wavelength range.
A. Ferrario, M. Garbi
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