Srini .... This means that you have entered through a dislocation in the space-time continum....It means that you're traveling through another new dimension, a dimension not only of sight and sound but of mind. A journey into a wondrous land whose boundaries are that of imagination.
That's the signpost up ahead, Srini - your next stop buddy is, the Twilight Zone!
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mX10500=Output+Loss through flue gases+Unaccounted losses
based on these equation......by varying the load.
if we change the load fuel consumption will change.....this is way im doing calculations.
Well, Power output would = the load... the engine will output power (HP) in the quantity needed to drive the load... (if work is to be done) so that would not be a viable calculation.
If you want fuel consumption, waste heat, torque, for different loads thats different.
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Sorry, but it could never be negative. Even using you equation. As mentioned, engine load will vary from idle to full power.
You will have some available energy from the fuel comming in. Then, the engine transforms the fuel in its output. The balance between the usefull output and the energy contained in the fuel is the engine efficiency, and is a number between virtually zero and 60% for Carnot cycle based machines due to the inherent thermodynamics. It is indeed expected that the engine efficiency will vary according load (the most efficient engines are made to work in a constant speed-constant load regimen).
If you vary load, of course you are varying fuel consumption, that's where energy is comming in. How much? Power output x efficiency@load point.
Check out your available information and examine your calculations. If you are talking about an engine being tested, it could be easy to take readings, state a performance curve and check it out with some calculation.
Well, the <...engine...> manufacturer can. During testing enough data will be collected to enable a torque/speed load curve to be established. Phone call? Ask for technical support.
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Fuel consumption will vary with engine and fuel type, temperature and humidity, altitude and other factors...the only generalities to be assumed is that under heavy load more fuel will probably be used...over time lack of maintenance will increase fuel usage... a bigger engine will probably use more fuel to produce the same amount of work as a smaller engine...and around 50% load is usually the sweet spot....whatever anybody says, actual results may vary....
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Usually an engine will have a rated capacity (HP or KW) and a rated fuel consumption at that capacity (gallons or liters per hour). For example, suppose it is a 100-KW generator. If the electrical loads on the system total only 80 KW, then this generator is running 80% loaded. However, the fuel consumption will not decrease quite the same; it will use perhaps 83% of the full-rated value. Etc. If there is no load (0%), the engine will still burn fuel, maybe 20% of full-rated.
If you are lucky, the engine literature may give fuel-consumption rates for such part-load conditions. If not, a rough estimate could be made by a linear graph based on this concept.
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Engine Working Loads
Re: load on engine
