Fuel Definition and 563 Threads

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 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?

1 litre of petrol contain about 8.79 KWHr (30023 BTU) of energy. A car wieghs about 1500Kg is able to run for about 10000 meters by burning 1 litre of petorl. For moving 1500 Kgs for 10000 meters the energy required is 150 Megajoules which is equal to 41.67 KWHr. How this is possible? Am I...

I was given a task for homework. I am in 8th grade and please could you tell me how you separate hydrogen from h2o and make hydrogen fuel. thanks

Homework Statement The space shuttle, with an initial mass M = 2.41E+6 kg, is launched from the surface of the Earth with an initial net acceleration a = 26.1 m/s2. The rate of fuel consumption is R = 6.90E+3 kg/s. The shuttle reaches outer space with a velocity of vo = 4632 m/s, and a mass of...

Coal- clean? or dirty? Hello everyone I have received a termproject regarding energy myths and my topic is this: Can coal be as clean as other fuels? I personally would say yes but I need some good replies from you guys for this survey...either the eco side or the capitalist side...

Homework Statement I'm trying to calulate the efficency of a small hydrogen fuell cell that I built. I have all of the measurements, but I'm not coming up with a resonable effiency. Homework Equations \frac{P OUT}{P IN}x 100 The power to electrolyze the water is the P IN. 3.25 W...

Rocket propulsion In the serway textbook at the rocket propulsion section it is mentioned that If the fuel is ejected with a speed v_e relative to the rocket (the subscript e stands for exhaust, and v_e is usually called the exhaust speed), the velocity of the fuel relative to the Earth is...

it is unfortunate that it has come down to this... http://news.bbc.co.uk/2/hi/middle_east/7068239.stm this conflict has no real winners... :frown:

Any ideas about the causes of the incident at the new Australian research reactor (OPAL) where some fuel plates in some of the assemblies were found to be elevated? I.e., translated vertically upwards. This has been reported as the plates being "partially" dislodged, but the actual degree of...

Homework Statement A bus runs out of fuel as it approaches a hill. If the hill is 3.54 m high, how fast must the bus be traveling in order to coast just to the top of the hill? Homework Equations The Attempt at a Solution How do we solve this problem?? We aren't given any...

http://www.nextenergynews.com/news1/next-energy-news-betavoltaic-10.1.html I cam across this article. It is horribly written from a scientific standpoint and lacks some necessary information on how the device works. But the basics are... Tritium is the beta source, porous silicon matrix...

i need to calculate the surface area of a furnace for a firetube boiler. do anyone know what is the temperature of the gas inside the furnace when Heavy fuel oil is burnt?and also what is the temperature of the furnace wall. thank you in advance

I hear a lot of talk about the law from teh 70's passed by Congress that forbade the reprocessing of commercial SNF. In my Radioactive Waste Management class today, the professor (who is a CHP/PE who specializes in waste management) said it was actually Carter, not Congress (which means, I...

what is the stiochiometric air-to-fuel ratio for heavy fuel oil? i need it to calculate the enthalpy of gas fromheavy fuel oil firing .

Anyone know how long a typical let's say news helicopter can last in the air given how much fuel it holds? I am not sure but I heard a news helicopter or a police helicopter probably won't last more than 3 hours in the air. Some military transport helicopters can only do about 2 and attack...

[SOLVED] Fat: the fuel of migrating birds Consider a bird that flies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W (this rate represents the power consumption of the bird). Assume that the bird consumes 4g of fat to fly over a...