Fuel Definition and 563 Threads

Homework Statement I posted int he other section but not sure if that area was a bit high maths I have this questions an answer to it would be great. .Q.1 At t minutes after an engine starts, the rate of fuel consumption is Rkg per minute. it is given by R=10+ 10/2t+1. a) Sketch R as...

Can a capacitor be used to fuel the electrolysis process?

Does anyone think anything will come from this? http://news.yahoo.com/s/ap/20070910/ap_on_sc/burning_seawater

Can anyone tell me if it is right to say that maximum power of a hydrogen oxygen fuel cell varies directly (with constant efficiency) with gas flow rate at constant pressure at room temperature

Let's assume we have a generic, standard design ICE car, except that transmission is CVT (continously variable) and can be popped into neutral, since this simplifies the problem. Assume car travels in a hypothetically-empty freeway at any speed and also assume that driver is optimizing fuel...

I was thinking. Now people plan to build factories to transform wood to liquid fuels. But why not run a motor on solid fuel. A diesel spread diesel to a fine particle dust so it burn faster and better. But you can get a explosion by sawdust. Is it not possible to get sawdust into the...

Hi! I'm django, new member. Right, I would like to talk about fuel cells. At first glance they are great, right! 99% fuel efficieny. But what most peopkle don't realize, is that although hydrogen might well be the most predominant element in the Universe, it is not available on Earth in...

hey guys can any1 tell me wats the concept behind cars using compreesed air as fuel...

http://blogs.reuters.com/2007/06/19/its-new-its-disgusting-and-it-fooled-an-oil-industry-group

I need help thinking of ideas for slides. I have "How it works", "benefits", "challenges", "Physics behind it", "Hydrogen vehicles", "Why Hydrogen", "What is a fuel cell", "Uses", "efficiency", "Fuel cell configurations". I can't think of anything else.

Check out this video. It looks like the future of this is very bright.

With the model, they can make tiny changes to the timing of the opening of both valves and ultimately optimize how engines run on alternative fuels. "The major issue right now is that we have all these vehicles on the road today that are 'flex fuel' vehicles," Shaver said. That just means...

Does anybody know what's the most recent alternative fuel that has come out beside Biodiesel pro types and Ethanol.Or what the efficiency rate of this fuel is?

When Ethanol is talked about as a fuel, it's the same exact molecule in alcoholic beverages, right? If that's the case, what is it about Ethanol that makes it preferable as a fuel to other alcohols? Is it just that we already have the capacity to ferment ethanol from sugars easily, or is...

I need to do some head loss calculations for pumping diesel fuel or No. 2 fuel oil from a storage tank to an emergency generator. I see in many places that diesel fuel is specified to have kinematic viscosities of 1.3 to 4.1 cSt at 40C. However, under worst case scenarios, this fuel is likely...

The other day I took note of the fact that the U.S. does not recycle its spent nuclear fuel. This struck me as very wasteful. Could it be recycled at some later date? Will we run out of Uranium in 50 years, or can we simply dig deeper into the Earth to get more? There must be a large amount...

Hi How is it possible to tell if fuel (gas) is contaminated (by water / alcohols / oils etc)? Roger

Number of weeks back I was reading in Wikipedia on plot holes in movies, one of the mentioned plot holes is in an awful movie I'm going to do my best to avoid: Battlefield Earth. But I digress. The plot hole, among others, is aviation fuel spoils after a few years, so it would be impossible to...

:smile: Hi I did this simple calculation as a mature student in 1965 & now I need to prove my statement. 'In most hydrocarbon fuels the combustion of Hydrogen H2 gives about 90% of the toal heat' Eg Propane C3 H8 gives 50,350 KJ/Kg, H2 gives 141,790 KJ/Kg I know Carbon is a lump of black stuff...

Why is fire hotter when fueled by sulfur as compared to say, paper, wood, or charcoal?

I live in Saskatchewan, which has the world's largest and richest Uranium mines (producing 35% of the world's uranium from deposits as rich as 25%). But at present rates of extraction, the known reserves will last only 20 to 30 years according to the Cameco, the largest uranium producer. It...

I am doing a project and was researching some information and found this site and read some information as to what I am doing but it didn't have all the answers needed. I'm doing a project on egt readings and twin cylinder 2 stroke snowmobile engines. For example what effects higher or lower...

I am not sure why the Pebble Bed modular reactor (PBMR) is being touted as the great solution to problems with nuclear power. It uses a once through, virtually non-reprocessible fuel. It produces a high volume of waste consisting not only of the fuel but the casing/moderator which has about 50...

I read about incidences of fuel tank explosions in commercial airliners recently. (For example, this http://www.cnn.com/2006/US/07/14/twa.main/index.html" ). I'm aware of four incidences of fuel tank explosions on commercial airliners. All four were on Boeing airplanes. - The first was in...

I'm a physics student trying to do a project on fuels cells. One thing I don't get is, when the atom goes through the electr-- whatever, how does it separate into electrons and protons. I thought the only way to separate electrons from the nucleus is by extreme heat and pressure, like that...

So I'm starting to read up on some of this stuff on the internet but most the argument counterargument seems to be from the same sources Gold vs peak oil theorist. Is this debate so far concluded in academics that no research is being published in journals? What is the curret status of the...

Hey there , It's known that metalic U was uesed as a fuel in certain types of reactors. What I 'd like to know : 1-Which type of reactor use metalic Uranium ? 2-Is Uranium metal used nowdays as a fuel? 3-what are the disadvantages of using U as a metal beside reacting highly with water ?

i'm looking for help to a question that i have, i have tried every thing to find an answer to it. the qustion is "how would would an increase in fuel burned affect the PV daigram of a given engine. i belief it has to do with changing of the pressure and volume figures on the PV diagram. if...

What is the shelf life of jet fuel especial for JP-5? How to predict it? My homework ask me to write topic about this but I don't have any idea. Is that correct for the 4 years of the shelf life of JP-5?

hello every one while surfing i came across this site http://netmar.com/~maat/archive/feb2/carplans.htm it has some plans and drawings for adapting an ordinary petrol/gasoline engine to run on water i just started university as a mechanical engineer may be i will take this as a final...

was recently informed that the microbial stew in a termite's gut is the most efficient known transformer of cellulose to sugar. as sugar is the food source that ultimately results in our production of alcohol which can be used as alternative fuel, doesn't it make sense to synthesize the...

A rocket, mass m=4000kg, lifts off the ground vertically with acceleration of a=0.2g. The velocity of gass emmiting from it is u=1200m/s (with respect to the rocket). Find engine's reactive force and then fuel burn rate (mu). This is what i managed to do: rocket's speed at any moment t (with...

In my school we are developing and investigating the process of generating electricity by means of an hydrogen fuel cell. We have started with an aqueous solution of NaCl and connect it to a 12 volt generator. Then, we waited for 3-4 minutes and disconnected it from the generator and connected...

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...