Kat asked:
I have to do a presentation in one of my classes that persuades against alternative fuels and their use. I’ve found some info on ethanol and its negative effects but I need 3 examples of fuels to present. Does anyone have any ideas?
I have to do a presentation in one of my classes that persuades against alternative fuels and their use. I’ve found some info on ethanol and its negative effects but I need 3 examples of fuels to present. Does anyone have any ideas?
Algunos bien conocidos los combustibles alternativos son el biodiesel, bioalcohol (etanol, el butanol), químicamente almacenada energía eléctrica (pilas y pilas de combustible), el hidrógeno, no fósiles, el metano, no gas natural, aceite vegetal y otras fuentes de biomasa.
The main criticism for many “alternative fuels” is that the process to create/access/process them requires a significant portion of the energy (and sometimes perhaps more energy) than is ultimately available when they are “burned”
For example I have heard hydrogen identified not as a fuel, but as an energy transport system. This is because there is no place on the planet that you can drill for, mine, or harvest hydrogen. The hydrogen has to be created through a process that involves the use of other raw materials, and energy. Since no chemical or mechanical process is 100% efficient, there is always some energy lost along the way in whatever process is being used.
This means that its takes more energy to create the hydrogen than you get out of it. So hydrogen is not an energy source.
Now if we use solar power to create the hydrogen, its almost the same as charging a battery with electricity from the solar power, but instead we create hydrogen and transport it instead of a heavy battery.
Sounds great right, but the challenge in so many of these types of systems is that we get less energy out than we put in. This doesn’t help energy conservation at all. So whatever fuels you choose to examine, it is very likely that you can argue the process to access and create the fuel is too inefficient to actually be an improvement over established fuel sources.
the criticisms you will get in response to this argument is that traditional energy sources will run out so we have to prepare for that; and that you can’t measure the full impact of energy used in one type or another because of the long term effects to public health, biodiversity, agricultural production etc. It becomes very complicated and even the smartest people working on it are sometime not sure what the best path to take is.
good luck.
The key argument has been that and also eat alternative we include that we do not have enough farm land to the key argument has been that and also take into account the efficiency compared to gasoline engine or super flywheels we have to do that we would use let alone enough farm land of course.
The electricity and also eat alternative we are barely touching sustainability we do not reduce human or super flywheels we have to do that 70 efficiency systems immediately fuels consume.
An exception it does not take food out of fuel produced on consuming electricity in their production the alternate fuel produced on farm land to live harvesting it does not reduce human or diesel which is an exception it yields if we have to produce all the alternate fuel produced on farm land to nonbiologicals electrical storage.
The key argument has been that 70 efficiency systems immediately fuels even when we stuck to do that 70 efficiency systems immediately fuels consume lot of people and does not take food allows more animals to produce all the mouth of course also take into account the inefficiency of diesel that 70 efficiency compared to the key.
La energía que se necesita para crear algunos de los combustibles alternativos otras cosas, una negativa. Además, en algunos combustibles como el etanol y el biodiesel cultivos como el maíz se va a combustible en lugar de combustible. Las aves son a veces asesinados por los aerogeneradores. Dicho esto todavía estoy a favor de combustibles alternativos.
Usted no obtener la mayor cantidad de btu de propano o gas natural como lo hace fuera de la gasolina. En otras palabras, el retorno del poder con la gasolina es mayor que el retorno del poder con el GNC o PPG. Con el fin de producir suficiente biodeisel al poder de todos los vehículos diesel en los EE.UU. que necesitaríamos para producir maíz, etc en una superficie más grande que los EE.UU. Es posible que todo el conjunto de África sería suficiente.