Fuel Definition and 581 Threads

i bought an indoor lantern that calls for ethanol as its fuel, however none of my hardware stores seem to carry ethanol (Ace, Truevalue, Home Depot). They do carry regular denatured alcohol in the paint sections. Can I use that or where can I buy canned/bottled (bio)ethanol?

batteries or fuel cells? hydrogen costs too much to be an effective fuel alternative? the catalyst required for the electrochemical conversion reaction is pricey platinum? Using hydrocarbons as a source for hydrogen we have more CO2 in the atmosphere? and require a high temperature...

Homework Statement a mixture of 0.64 x 100 percent iso-octane and {1-0.64} x 100 percent methanol, based on volume, is mixed with air and combusted. Calculate the stoichiometric air fuel ratio. Note: please not this is mixing on a molar basis, not mass basis. It is necessary to perform a...

Hi guys, are any of you familiar with jet fuel contamination? I'm doing a research paper on ways to reduce or prevent it. Any input and or links would be appreciated. Thanks in advanced

Homework Statement 2 H2(g) + O2(g) 2 H2O(l) K = 1.28e83 As temperature increases, does the maximum amount of work obtained from the fuel cell reaction increase, decrease, or remain the same? Homework Equations 1. G = -RTln(K) 2. dG = dH - tdS 3. w_max = dG The Attempt...

Folks, this is my first thread in this forum. I'm writing my PhD about HTR-Fuel Elements. I'm not quite sure if anyone in this forum knows about this sort of fuel which is totally different to "normal" fuel. Anyway, I'm looking for informations about research in the US (or global) what...

Here's the link: http://www.popsci.com/scitech/article/2007-11/turning-water-fuel I find the idea interesting that the radio waves may assist in breaking the oxygen-hydrogen bonds of the water molecule. But, why should this effect only exist with salt water and not pure water? Salt water is...

I'm an undergrad working on fuel cells for a project and I have been using a book to aid me. There are several equations in the book that were not explained properly so I was hoping someone on this forum could help identify how they were derived. The first 2 is related to the pressure within...

Hi, any idea , what is the material inside a internal combustion engine need to be change when i change the gasoline fuel into hydrogen fuel.? Also what is the lubricant that will suitable for this hydrogen fuel. thanks Piston top - what is the suitable material Cylinder head-...

What would happen if you tried? I mean, I assume by default and in reasonable quantities you can, since grain alcohol is basically just ethanol, right? But do they put any additives in the stuff used for fuel, say? (Let us of course assume this is not ethanol/gasoline mix.) (This somewhat...

Consider a spaceship, initially at rest on the surface of a planet that has no atmosphere. It takes off with constant force from thrust. The fuel mass decreases linearly with time, and the rocket accelerates directly away from the planet (no curving off orbit the planet). Use GMm/r^2 for...

Homework Statement A fuel may be deignated by the chemical formula C51 H105 S2 (OH)3 Write out the balance equation for complete combustion of this fuel. Homework Equations Cx Hy Oz Sn [(x) + (y/4)] o2 > xCo2 + (y/2) H2o The Attempt at a Solution The problem is that I...

Homework Statement Rocket with fuel mass of m(initial) Rocket without fuel is m(final) Time for fuel to be used up is t(final) Homework Equations What is m(t) (slope of m vs t graph) (i assume t(initial) is zero The Attempt at a Solution [((m(final) -m(initial)) / t(final)]t +...

Hi, I have a college project running for which I have to design an automatic car refuelling cell. This includes automatic robot positioning, automatic payment, assisted car alignment et cetera. I like to stress that neither I nor my fellow students are mechanical or electrical engineers...

Not sure if this has ben done before; I purchased one of these recently http://www.ecomagnets.com/thermoflow.htm It's basically a magnet that you strap to the fuel line of you're boiler. Claims that it increases fuel efficiency etc etc. It also claims it was discovered during WWII, to...

Homework Statement A 4.00kg model rocket is launched, expelling 63.0g of burned fuel from its exhaust at a speed of 565m/s. What is the velocity of the rocket after the fuel has burned. Hint: Ignore the external forces of gravity and air resistance. Homework Equations Conservation of...

I've heard about the units that run on DC and extract O and H from water. The gases are then used on automobles to increase fuel mileage. I'd like to hear the thoughts on energe in and energy out. Also, as hybrids store energy for a finite number of power demands, can these fuel cells do a...

Just curious as to why you don't find heat pipes or any passive cooling in larger PEM type fuel cells. I have seen them used in methanol fuel cells but not FCs for hydrogen. Is there a good reason for this? Is it because the power density of fuel cells is typically higher than that in many...

hey dudes whats been puzzling me is what determines fuel consumption in a cars engine. i suppose i can reduce my question to this what determines how much feul is injected into the cylinder in anyone stroke? scenario 1: if I'm towing a heavy trailer uphill, in say 4th gear [manual...

hi, recall the familiar round trip - it's more or less the same as in this arXiv article (http://arxiv.org/PS_cache/physics/pdf/0604/0604025v3.pdf) - round trip with acceleration g. me and my friends were wondering the following: imagine that the passenger abroad the rocket travels for 4...

Heard on the radio that the aircraft that crash landed at London airport crashed because of ice in the fuel (or that is the best guess) surly this is a cop out.

I want to get a little into rocketry and i want to know what are the best chemical mixes for solid and liquid state rockets? also i wanted to know if there are such things as super chemicals. I am not sure if i made that up or not or it just a different word but, what i mean are chemicals that...

For those of you that arent very familiar with PEM fuel cells, their shortcomings basically revolve around the carbon/platinum membrane and is essentially the "heart" of the fuel cell. But why does a fuel cell need a membrane to function? If you think about it, just about all energy conversion...

In this problem, we're going get a rough estimate the amount of uranium fuel it would take if the US received all its electrical power from nuclear power plants. The size of a power plant in normally given as the about of electrical power it can produce when running a full capacity. This...

Does anyone have the linear or cubical expansion coefficients of diesel fuel/kerosene?

I have an application where I am bubbling N2 into diesel at the bottom of a storage tank to register the head pressure. I want to calculate at what depth (head pressure) the nitrogen gas would go into solution instead of creating a bubble at the bottom of the tank. Could you explain or...

What about using water as fuel in Automobiles, recently I've seen in local TV channel of our country, Genepax Co Ltd of Japan built a new car that uses water as fuel. The system produces Hydrogen from water. For more detail, I used this link, [crackpot link deleted] Welcome for More...

I work at a Pool store where I have many chemicals laying around me. One day I got bored and started toying with the idea of what can I make out of these chemicals. So concluded, here is my Equation: NH3 + 3 HOCl = NCl3 + 3 H2O Simplified: (1 part Ammonia) + (3 parts Hypochlorous...

The new Honda fuel cell car is out and I am confused. There are now gas cars, electric cars, hybrids, and now hydrogen-to-electricity(fuel cell) cars. I always thought that fuel cell tech was basically filters that produced combustible H from H2O, and after combustion rejoined the combustion...

Internal combustion engines, Ram Jet, Turban engines etc. require that the air fuel mix be compressed. Is the compression of the air fuel mixture required to give a higher or more efficient energy output? Otherwise if the air fuel mix were at a static or ambient pressure vs. compressed would the...

I have just finished my sophomore year at Columbia University with a major in physics. I chose Columbia College instead of the engineering school due to the better reputation/ranking and I was not sure whether to go into physics or engineering. However, after two years of courses, I am very...

Motoring. With fuel prices so high it seems a good idea to try every way we can to save fuel, Are there any TESTED methods that save fuel, any gizmos that actually work? Take for granted that your vehicle is in top running order, engine tuned, brakes running free, tyres at correct pressure etc.

Yep, £70. For you yanks that's about $140. And it's only a moderate saloon car. Grrrrrr. Time to start shopping for biodiesel.

The weight of a rocket is 80kN at the instant it takes off , and the products of the combusion are ejected at a velocity of 0.60 kms-1 relative to the rocket. Calculate the rate at which the rocket must be consuming fuel in order to take off vertically. Ans: 134kgs-1 Cant find a solution...

I have again a question: In the new 3rd generation reactors, I thought that one could run entirely on MOXed fuel. On the other hand, I read somewhere that an EPR reactor can only be filled for about 50% with MOXed fuel. Any comments ? And if the second thing is true, is there a...

Hey guys, Just trying to understand this piece of information I have been given. It is for a compression ignition engine. I can see where they get the 115.954 kmol/kmol fuel and 120.204 kmol/kmol fuel from but don't understand how to change the units 0.7027 kmol/kg fuel and 0.7285 kmol/kg...

Hai, I want to know to the basic criteria to be noted while designing the fuel rail. Is there any special recommendations or standard for designing a fuel rail.

I am looking to find information on fuel injector vanes that can be used for fuel injection into a gas turbine. I am at the moment designing one that will be integrated into the gas turbine. However i am struggling because i need to know if there is a formula for particle spread I have a formula...

I have a question: it is generally stated that 100 micrometers is the acceptable limit on the thickness of the oxidation layer on Zircaloy4 fuel rods. But I'm at loss as what is the reason for this limit ? Is it structural integrity ? Thermal resistance ? Mechanical tolerance ?

Showman Sir R. Branson put on another display that highlighted some technical and business advances on the use of biofuel instead of the traditional kerosene source for jet fuel. Branson's Virgin Airways flew a 747 Sunday from London to Amsterdam w/ one of the four engines using a...

What does the operating temperature of a fuel cell mean? Is this the temperature the cell generates or the temperature the cell is brought to so that it can operate? I see articles that state operating temperatures for different fuel cell systems---i.e. solid oxide 600 to 1000 C, phosphoric acid...

Could anybody advise the compressibility of Diesel fuel at 10 degrees Celsius? Thanks Filippo

Aside from combustion (oxidation?) of the noxious fuel from the exploded spy satellite, will most of the remaining fuel eventually burn up due to friction with the atmosphere, or will it fall unaltered as precipitation?

Let me start off by saying that I understand conservation of energy and the laws of thermodynamics. I know you can't use water for fuel, and you can't power a vehicle soley on hydrogen produced by an onboard electrolyzer. But... I have read quite a few claims that using an onboard...

It may be valuable to consider microalgae as a potential solution to a number of problems; not the least of which being the energy problem. Algae can be used to produce biodiesel, ethanol, and hydrogen, as options to the use of petroleum based fuels...

Enuma's thread got me thinking why these isn't more buzz for the hydrogen cars like the Honda FCX, GM Sequel, Nissan Frontier, BMW 7...

When hydrogen combusts it is turned into h20. H20 can be broken down into hydrogen and oxygen. NASA has been using solar panels power hydrogen generators in space for this purpose. Say you had a vehicle that carried a water tank, a hydrogen generator a solar panel a battery and a hydrogen...

I understand the sensitivity and confidentiality of some of this data. Its so difficult to archive or access data for this experiments (coated particle and pebble irradiations at material testing reactors: IVV-2M, R2, HFR, AVR, Dragon etc.) as well as the current irradiation programs...

Hi guys, Im doing a group project on a conversion of a small motorcycle engine(suzuki dr125s) so that it can run on ethanol(have not decide on what proportion, maybe going to run it at 85% or more). The modifications and the reasons behind it : 1) Cleaning/changing the fuel...

What is the maximum useful work which can be obtained from a hydrogen-oxygen fuel cell that produces 1.96 kg of water at 25°C? How do we approach this problem? I guess -Ecell x charge = w?