G
Guest
Guest
Guys
Was out West at the weekend and found diesel at a very good price so filled up both main and auxiliary fuel tank. I figured I'd saved a few quid but then realised that I'd have to carry the auxiliary 170Ltrs around for 400 miles before I could start burning it. Then I was wondering how much diesel I burnt carrying around the auxiliary tank. Now I think I didn't save anything - possibly the opposite.
Anyone ever done the calculations to see what the Brake specific fuel consumption is of a LC or come across it anywhere?
Brake specific fuel consumption is a measure of an engine's efficiency - the rate of fuel consumption divided by the rate of power production.
If we knew this we could possibly calculate the cost of carrying additional weight when driving.....
Perhaps there's a rule of thumb out there - something like every additional 100KG reduces fuel efficency by 2% or something.....
Niall
HDJ80 - heavier than it needs to be.
To calculate BSFC, use the formula BSFC =3D Fuel_rate / Power
Where:
Fuel_rate is the fuel consumption in grams per hour (g/hr)
Power is the power produced in Kilowatts where kW =3D w * Tq / 9549.27
w is the engine speed in rpm
Tq is the engine torque in newton meters (N=B7m)
Note: The Power in the BSFC calculation is not weather corrected.
The resulting units of BSFC are g/(kW=B7h)
The conversion between metric and U.S. units is:
BSFC_US(Lbs/(HP*Hr)) * 608.277 =3D BSFC_METRIC(g/(kW=B7h))
BSFC_METRIC(g/(kW=B7h)) * .001644 =3D BSFC_US(Lbs/(HP*Hr))
Was out West at the weekend and found diesel at a very good price so filled up both main and auxiliary fuel tank. I figured I'd saved a few quid but then realised that I'd have to carry the auxiliary 170Ltrs around for 400 miles before I could start burning it. Then I was wondering how much diesel I burnt carrying around the auxiliary tank. Now I think I didn't save anything - possibly the opposite.
Anyone ever done the calculations to see what the Brake specific fuel consumption is of a LC or come across it anywhere?
Brake specific fuel consumption is a measure of an engine's efficiency - the rate of fuel consumption divided by the rate of power production.
If we knew this we could possibly calculate the cost of carrying additional weight when driving.....
Perhaps there's a rule of thumb out there - something like every additional 100KG reduces fuel efficency by 2% or something.....
Niall
HDJ80 - heavier than it needs to be.
To calculate BSFC, use the formula BSFC =3D Fuel_rate / Power
Where:
Fuel_rate is the fuel consumption in grams per hour (g/hr)
Power is the power produced in Kilowatts where kW =3D w * Tq / 9549.27
w is the engine speed in rpm
Tq is the engine torque in newton meters (N=B7m)
Note: The Power in the BSFC calculation is not weather corrected.
The resulting units of BSFC are g/(kW=B7h)
The conversion between metric and U.S. units is:
BSFC_US(Lbs/(HP*Hr)) * 608.277 =3D BSFC_METRIC(g/(kW=B7h))
BSFC_METRIC(g/(kW=B7h)) * .001644 =3D BSFC_US(Lbs/(HP*Hr))