From academic point this can be calculated using the heating value of the fuel multiplied by the different values of efficiencies. What I need here is a thump rule or some experience values.
The graph attached shows data concerning energy generation and fuel consumption for 2 different small Diesel generators with nominal powers of 2 kW and 3,3 kW.
These data are results of laboratory tests for the Diesel generators supplying different loads, operating with Diesel with LHV of 10,550 kcal/kg (Diesel used in Brazil).
The average consumption measured is of approximately 0.47 L/kWh.
For bigger Diesel generators the efficiencies shall be much better than these.
Thank you Marco,
If I calculated the over all efficiency of conversion (not thermal) from diesel to electricity I get 14.7. am I right.
I used density of diesel 0.85.
I also consider a density of 0.85 kg/L for the Diesel.
However, I calculate an overall efficiency of 20,4 %, as follows.
Effic (%) = ___________________3.6_x_106_J/kWh__________________
(10,550 kcal/kg) x (0.85 kg/L) x (4,184 J/kcal) x (0.47 L/kWh)
How did you calculate 14,7%?
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