Fuel Definition and 580 Threads

i recently read in a popular science magizine about a guy inventing a substance that was like a "scafalding" for atoms. that the atoms (gas state) bonded to this structure (assuming this scaffalding is microscopic) making it "semi-solid" i don't know what you would call it. but what if you did...

hello everybody my ques about the fuel injector,which is working electronically-- i saw it for real in a car was fixing by a mechanic,and i looked at the electronic fuel injectors mounted on the fuel rail----and while the engine was running,the injector as u know-is supplied by the pressurized...

I have to work out the open loop gain across a voltage amplifier using a thevenin equivalent circuit... Can anyone help me, PLEASE :confused:

I'm trying to learn about how differing distillation curves affect gasoline's performance. I'm coming at this from the perspective of a performance engine enthusiast who uses racing fuels. My research thus far indicates typical pump fuels have a 90% distillation temp in excess of 300 degrees...

I've been confusing myself over how much energy it takes to accelerate a vehicle (assuming no friction/air) with a given amount of fuel. I know that the amount of energy required to reach a given speed increases quadratically, but does the amount of fuel required also increase quadratically...

Why is fuel still needed in space? If space consists on nothingness, why would a rocket need fuel to gain momentum? For example, if you were to hit a golf ball in space, it would keep going and going right? So besides a gravitational pull from the Earth that the rocket initially needs to escape...

can anyone help me with the following problem: I have been asked to estimate the rise in temperature in the salt in a final storage containing spent HTR-fuel elements in a time span of 100 years. Given the following data: Average heat flux 10 W/m; Heat capacity of salt 0.9 kJ/kg.K; density of...

Hey everyone, I found this really interesting article on Technology Review about a new technology that could remove the sulpur from high-temperature fuel cells. The sulpur causes the eventual shut down of these fuel cells, but with this new technology the cells continue working and are...

i was thinking over how a hydrogen fuel cell works, seperating the electrons and protons (into its ions like any other way of converting electrical energy to chemical) but i wondered if the protons as well as the electrons could be used as a current to creat a circuit such as the electrons do...

Fossil fuel is former live organic matter which has bee buried for hundreds of millions of years. They have lots of energy in them and we use it by burning them and converting some of those energy into useful work. What energy is that? Why does fossil fuel have so much more energy compared...

So my uncle approaches me today with some investor guide dealy. It takes albout some Power Airtech company and how it is going to introduce some zinc-air fuel cell that they developed with LLNL. Can someone explain the advantages and disadvantages of such a system. They made it out to be greater...

What I have to do is find out which fuel would be best to use as an automotive fuel. My choices are methanol ethanol and propanol. My guess so far is propanol because it has a molar enthalpy of combustion of 2021kJ/mol which is close to double ethanol (1367kJ/mol) but it needs much more...

One issue that I see quickly evolving is that of an eclectic national alternative fuel market. Until now we have enjoyed the luxury of only two real fuel options for transportation, which has made thing simple for consumers. However, we may now face as many as a dozen options before this all...

About an year ago, i had heard a lot about the upcoming technology of fuel cells. i was pretty intrigued by the description that it combined, hydrogen and oxygen to form pure water. no wastage. i believed it would be the alternative fuel we were in search of. why then is there not much...

Is it possible to make fuel cells that run of ethanol or even sugar? :confused: Is it a good idea? Why/Why not?

how do i make a fuel cell which utilises hydrogen and oxygen to make water and in the meantime give out loads of heat. is it possible?:

I haven't seen this discussed here before. If it has can somebody direct me to the thread. http://www.isracast.com/tech_news/231005_tech.htm So, anyone who knows about such things, is this a unique idea or is this currently being worked on by several companies? (I haven't heard of this...

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.