is electrical load on generator equal to higher fuel consumation?
is electrical load on generator equal to higher fuel consumation?
(OP)
Relationship between generator load and fuel consumation on ships auxiliary engine.
How´s this relantionship?..since the engines run on fast rpm, i still assumme that teh generator torque influences the fuel feeding,,,or not?
Thanks in advance
How´s this relantionship?..since the engines run on fast rpm, i still assumme that teh generator torque influences the fuel feeding,,,or not?
Thanks in advance





RE: is electrical load on generator equal to higher fuel consumation?
Rafiq Bulsara
http://www.srengineersct.com
RE: is electrical load on generator equal to higher fuel consumation?
.....now i´m a simple mechanic studying marine engineering and I know for af fact that car generators electrical load has an influence on fuel feeding..cuz of the torque required when extra el. load..windowshiels washers for instance..that´s the the reason why i asked.
....best regards....
RE: is electrical load on generator equal to higher fuel consumation?
No, you have got it all wrong. The diesel will have a governor that keeps the speed (nearly) constant so that you get the 60 or 50Hz generator output tha the set is designed for. As you increase the load on the generator, (your consumers) the drag will increase so that the engine governor will have to open up more fuel to the injectors to keep the speed (nearly) at set RPM. So therefore the fuel consumption will go up as load increases.
rasevskii
RE: is electrical load on generator equal to higher fuel consumation?
-------as soon as i know for a fact that the el. load in kWh costs them the equivalent in tons fuel I´ll kind of smile
RE: is electrical load on generator equal to higher fuel consumation?
There is no free lunch. Fuel provides the energy and load consumes the energy. You figure out the relationship.
Rafiq Bulsara
http://www.srengineersct.com
RE: is electrical load on generator equal to higher fuel consumation?
1000* 100/1000 = 100 Kg fuel
--------that will be the relationship, i believe..please correct if i´m wrong.
RE: is electrical load on generator equal to higher fuel consumation?
The more efficient engines may get near 14 KWHrs per Gallon.
Caveats:
This is based on an engine working in it's most efficient range. Less than a full load results in less than the optimum KWHrs per gallon.
This is based on test fuel at a given specific gravity. Lighter fuel will produce less KWHrs per gallon and heavier fuels will produce more KWHrs per gallon. This effect is fairly linear.
But the answer to your question is yes, more load always uses more fuel.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: is electrical load on generator equal to higher fuel consumation?
Rafiq Bulsara
http://www.srengineersct.com
RE: is electrical load on generator equal to higher fuel consumation?
"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
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RE: is electrical load on generator equal to higher fuel consumation?
Actually i´m only calculating how the chiller retrofit (from R22 to 134a) will act in terms compressor efficiency, since that´s an older screw one...but i allowed myself to amplify the picture, since the el-motor driving the compressor is rather big (I n = 720 A )...according to the crew the second engine (AE) is a back up..running for safety reasons cuz we r talking of a passenger-ship (2000 PAX).
...anyway I guess I should take a closer look to fuel consumption in different conditions(loads) and see if i´m able to come up with some results...instead of assumptions
..........cheers......
RE: is electrical load on generator equal to higher fuel consumation?
Example; A 150 kW motor will cause an increase in fuel consumption of 150/14 = 10.7 Estimate that you will use an extra 10.7 gallons per hour of standard specific gravity diesel fuel.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: is electrical load on generator equal to higher fuel consumation?
..as far as i remember fuel comsuption is a product of effective engine power and fuel specific heat value-----i´m really curious concerning the 14 gallons/h...........cheers
RE: is electrical load on generator equal to higher fuel consumation?
The numbers suggested here, by Bill, are for #2 diesel oil, the most common in North America. You may want to check out units that run on the fuel you are interested in.
Rafiq Bulsara
http://www.srengineersct.com
RE: is electrical load on generator equal to higher fuel consumation?
RE: is electrical load on generator equal to higher fuel consumation?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: is electrical load on generator equal to higher fuel consumation?
Please use a factor of 13.
Bill
--------------------
"Why not the best?"
Jimmy Carter