Efficiency Comparisons of Secondary Biofuels
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Abstract
Biofuels are essential for the energy production of the future. This report is a meta-study of the efficiencies of first, second and third generation secondary biofuels used for transportation purposes. We present and compare data from several studies concerning the efficiency of converting raw biomass info biofuels. We also compare this data to the efficiencies of hydrogen and solar power transportation systems. The efficiency data was presented as percentages from ratios of different data types, primarily exergy and energy efficiency ratios, which are defined for each study throughout the report. The highest efficiency percentages were displayed by second-generation wood knot rejects that did not require pretreatment input energy and resulted in high-energy ethanol output. The lowest efficiency percentages were from quasi-solar thermophotovoltaic radiator technology, heightening the reputation of biofuels as the efficient, renewable transportation energy source of tomorrow.
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