Fuel Definition and 563 Threads

I have several questions about hydrogen that I need help to answer them. gasoline; raw oil; mineral coal; wooden coal; dry biomass Which of the following materials could be use to produce hydrogen? I think they are the oil and the coals. Maybe biomass. Spaceships utilize hydrogen as...

http://healthandenergy.com/ethanol.htm I thought it was soppsed to be cheaper:rolleyes: What ever happened to Hydorgen fuel cells powerd cars.

Hi, I'm trying to calculate the efficiency of fuels such as gasoline, diesel, methanol, and ethanol. I have collected several properties such as energy content per gallon (btu) and densities for each fuel. I'm a bit confused as to how i can calulate these fuels' efficiencies...

What's with this "hydrogen fuel" craze? I heard something on the news about Iceland wanting to become entirely hydrogen powered. The reason being about reducing dependency on foreign oil. Can anybody explain to me how this would reduce dependency on oil? Hydrogen gas is made from methane...

I got to learn this stuff for my fuel cell project. Anyone know any good websites on it?

Here are the descriptions of two of my designs. ET1: Turbine and Electrolysis System The Turbine: I have used the water vapour exhaust of a PEM fuel cell to run a turbine to make electricity. After the water vapour has passed through the turbine it goes to electrolysis system. The...

My idea. I read somewhere that the gas from three cows could provide the cooking fuel for a family of five, and you could have fresh milk and cheese, and beef when the animal is old, i know we don't all have gardens but lots of tower blocks have flat roofs, so that is where they could be...

is there technology to use nuclear fuel for space rockets? what could be the fastest and cheapest way to transport 100000000 kg from Earth to mars? can fission be an alternative? help!

From a layman point of view: What is the main problem for producing sinthetically (and at reasonable costs) fuel for internal combustion engines? When we hear about the running out of fossil fuels, we are always drawn to the alternative energies (hydrogen fuel cells, electric cars etc), but...

Greetings! Would anyone know about how much fuel does a Harrier aircraft (with the Pegasus Turbo fan engine) consume when taking off verticaly? I tried searching the net with no success. Thank You Chris

How much are graphite plates? I need them to build my fuel cell.

What happens to large (greater than 100 micrometer) fuel droplets (however few) in the SI engine cylinder? Do they move up along with the piston or do they get deposited on the piston itself?

Does anyone know how to calculate the vaporization rate of a droplet of isooctane at a given diameter? Thank you

Can somone explain me how solid fuel rockets works? Where should I start the reaction, at the tail or at the head? What fuel is the best?

Spent reactor fuel continues to produce heat for a very long time and I am curious as to why this heat cannot be used for something, such as district heating. Obviously there are some barriers out there or it would be done. I'm wondering what these barriers are. Any discussion surrounding...

www.mybiopro.com/savefuel ... can anyone tell me if you can actually increase fuel efficiency by resonating gas, and can someone maybe send me some links (if you know any) that explain how these things actually resonate the fuel without any external power source. AND if they don't have a power...

It struck me other day that there is a very easy way to signficantly reduce the US fuel demand; that is to say, easy compared to many other options. In anticipation of the Los Angeles Summer Olympics, in what year...1980 I think, LA made a great effort to reduce traffic on the roads by...

Does anybody know much about, or know where I could find out about, diamond colloid? It is the most energy dense chemical fuel, correct? And if that is true, that would mean it can react to expend the most energy per ounce of any chemical reaction, right?

Hi, Does anybody know how to calculate the fuel consumption of a car? Any help would be great Thanks Alex

Hey I'm starting to build liquid fueled rockets.(built 1 but injecter didnt work properly :eek: ) Does anyone have any plans to build a rocket or at least some tips. :smile:

I have a doubt... Hi, I want to know, why do we use tanks with cylinder forms for fuel transportation and not with another geometric form, like a 3D rectangle (i don't know the english word for it... :smile:) ? thanks...

At which rate do Stars burn there fuel, I know there are different stars (giants,dwarfs etc...) For instance i read that our sun fuses 655million tons of Hydrogen into 650 million tons of Helium. The other 5 million is converted into 400 million watts of energy in the process. How did they...

I've been reading a lot lately about how people have vehicles that have a really good fuel economy. Some even seem considerably better than what the normal car can get. It makes me wonder if there are modifications being done to achieve this. I drive a 2000 GMC Sierra Z-71 5.3L truck...

NASCAR is annoying enough, without the figure that over 5% of the nation's gasoline supply (a large percentage of what we are forced to import) is wasted on the non-sport of auto racing. It's time we taxed some sensibility into this American-antithetical conspicuous consumption.

Okay, so I was watching Trucks! on spike tv last week, and he did an episode on biodiesel, even made some right before our very eyes. For those of you who don't know, biodiesel is an alternative fuel source for diesel powered enginens. It is a mixture of old used vegitable oil or fried food...

If the quasiturbine engine takes in fuel after compression and then burns it at constant volume, wouldn't that increase the efficiency of the process as constant volume burning is more efficient than constant pressure burning at same compression ratios? If such a burning is not possible, what...

[B] Unsolicited Proposal To Modify Shuttle External Fuel Tank Addressed Too: NASA HEADQUARTERS Attn: Sandy Russo Code 210.H Goddard Space Flight Center Greenbelt, MD 20771 Sandra.R.Russo@nasa.gov Office of Space Flight Space Shuttle Abstract, Introduction Project Description...

http://www.eurekalert.org/pub_releases/2005-06/acs-oc061305.php

I've got a problem. I tried to see what would happen when putting a fuel cell and electrolysis in a circle. I end up with infinite energy, so I must be doing something wrong. Electrolysis 4 H2O -> 4 H+ + 4 OH- 4 H+ + 4 e- -> 4 H -> 2 H2 || The H2 is lead to the fuel cell anode 4 OH- ->...

Hello. The contributors to this forum seem pretty knowledgeable so I would like some feedback on the idea proposed in this post to sci.astro: Newsgroups: sci.astro, sci.physics, sci.mech.fluids, sci.engr.mech, sci.space.policy From: "Robert Clark" <rgregorycl...@yahoo.com> Date: 28 Mar...

What is thermal electricity? What conditions (e.g. type of fuel) can make a flame pointed 'more upward'?

I found this website [PLAIN]www.waterfuelconverters.com[/URL] and I applaud the owner. Electrolysis is easy, and finally someone is doing something about it. Browns gas is much safer than gasoline.

I fount this site [PLAIN]www.waterfuelconverters.com[/URL]. Electrolysis is easy, and finally someone is doing something about it. I am an electrical engineer and I applaud the owner of the company.

Did I do this right? I'm relying on a formula the teacher gave us in class, without quite understanding it intuitively. So I'm just rewriting the formula to solve for my unknown and plugging in numbers. A sounding rocket launched from Earth’s surface is to achieve a final speed of 1000 m/s...

A 4350 kg rocket is traveling in outer space with a velocity of 126 m/s toward the Sun. It needs to alter its course by 24.8°, which can be done by shooting its rockets briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of 2240 m/s relative...

In another thread we talked about converting to a durable economy that is not dependent on fossil fuel. Now flexibility on energy and mobility seem to be inverse proportional. In static plants you can use anything that's available. Cars are more limited although there is still a range of...

I am currently in first year engineering. I am doing a project on electronic fuel injection. The project requires as much physics incorporation as possible. I am just wondering if there is anybody who has some advise or ideas for me as far as "the physics of electronic fuel injection."...

Here's another fun one: A 20,000 kg rocket has a rocket motor that generates 3.0*10^5 N of thrust. At an altitude of 5000 m the rocket's acceleration has increased to 6.0 m/s^2. What mass of fuel has it burned? I've already found the initial acceleration to be 5.2 m/s^2, then I used this...

Is this fair? Full Story I know this forum is full of arguments over whether or not global warming is even taking place, but even if it can be proven that it is, and that it is largely caused by greenhouse gases, is it fair to sue a nation for that? What is the U.S. doing that 90% of...

Is it possible to create a structure where 1)water is electrolysed into oxygen and hydrogen 2)Hydrogen is burnt in the same oxygen obtained from step 1 3)This releases lot of energy and forms water 4)This energy can be used to rotate the armature of an electric generator 5)Electricity can...

http://www.nea.fr/html/pub/newsletter/2002/20-2-Nuclear_fuel_resources.pdf Also som interesting articles here: http://www.world-nuclear.org/info/info.htm

I've got a little question here. Basically we've got this guy named "B" driving a straight track with a high constant velocity u. His buddy, "C" on the side of the track measures B's fuel consumption to be dn/dt. Now C filled the tank with just enough gas to make it the distance of the track...

Maybe you, chemical people could answer my question. Imagine a fuel injector surrounded by a coaxial air stream. The fuel and air flow are parallel, coaxial and axisymmetric. Both fluids obey ideal gas equation. Let's consider steady and compressible flow, i.e, variations of \rho are...

I have a buddy asking if I can do this for his 300 ZX. I have checked and there is a programmable module available with software, but apparently some companies [one at least] are reprogramming the factory chip directly. Does anyone know where to get the code, or at least what values affect...

My chemistry book says it is impossible to use anything but hydrogen in a fuel cell, but does not say why. does anyone know why?

Had a little project a while back, created some 'coke bottle' rockets. The ideais simple, use compressed air to push out an incompressible liquid, water creating some thrust for the bottle rocket to fly into the sky. there are plenty of tutorials for making bottle rockets out there, but i...

Cassini has been flying around our solar system since 1997 and it still has years of flying to go. how much fuel does it have on board (or did have when it first set off) it can't be burning fuel all the time surely, it must use momentum for long journeys.

[FONT=Arial]I was wondering if you could recommend an article that would explain a concept to me. That is: the drawback of fuel cells, reportedly, is that hydrogen is not readily available. However, I am wondering why it is that if the original idea of fuel cells came from reversing the...

There is a scene in the movie The Day After Tomorrow in which the temperature over Scotland rapidly drops to -150 F. The fuel lines in three helicopters freeze almost instantly and the helicopters fall out of the sky. That didn't seem too plausible to me. If any of you work with such fuel lines...

Hey guys anyone have an idea for a hydrogen fuel cell. I was thinking about one in which a battery first is used to split water into h2 and o2 using electrolysis. And then the components can be combined to produce energy. Anyone have any other ideas or links? Thanks.